1008 results about "Chemical sensor" patented technology

The invention relates to a sensor control method of an air purification system. The pollutant concentration gradient is monitored in real time by combining initial distribution of the sensors, and a pollutant diffusion path is simulated by utilizing a fluid dynamic model; a pollutant source is reversely deduced through sensor data, and the acquisition range of the sensor is dynamically changed; the method comprises the following steps: acquiring multi-dimensional data through physical sensors including particulate matters, temperature and humidity and chemical sensors including VOC and harmful gas, and extracting pollutant characteristics by utilizing PCA (principal component analysis); constructing hazard indexes of pollutants including AQI grading standards, and dynamically evaluating the priority of the pollutants in combination with real-time monitoring data of a sensor; for pollutants with different priorities, resources of the air purification system are distributed, and the air volume of a filter, the adsorption strength of activated carbon and the turn-on time of an ultraviolet germicidal lamp are adjusted; a self-adaptive calibration algorithm is introduced, and sensor output including interference correction of temperature and humidity on the particulate matter sensor is adjusted in real time according to the environment reference value; and dynamically adjusting the maintenance and replacement period of the sensor.

The invention provides a reinforced diesel engine friction pair on-line wear detection device and a wear detection method. The reinforced diesel engine friction pair on-line wear detection device comprises a wear calculation terminal, an NI-PXIe8115 acquisition instrument, a sampling detection circulating oil path, a cylinder pressure sensor, a rotating speed sensor, a vibration sensor, an acoustic emission sensor, a six-in-one lubricating oil physical and chemical sensor, an abrasive particle sensor, an abrasive particle visual sensor and a CAN / USB / RS485 communication interface. The method has the beneficial effects that the load of a friction pair of the strengthened diesel engine is large, the process from symptoms to failure is extremely short, and serious fault events are difficult to control, the device can quickly warn an abnormal state after being implemented, gives a corresponding action instruction to a user, and provides a reliable identification means for strengthening research, development and operation safety of the diesel engine.

The invention discloses a kit raw material quality detection method based on multi-modal data fusion, and relates to the technical field of automatic quality detection of chemical reagent raw materials. Comprising the following steps: S1, synchronously acquiring spectral data, microscopic image data and chemical detection data of a kit raw material through a spectral sensor, microscopic imaging equipment and a chemical sensor; s2, inputting the multi-modal data into a self-adaptive spatial-temporal feature calibration network, and analyzing local detail features and global time sequence features of the modal data through a multi-scale spatial-temporal feature extraction module; according to the kit raw material quality detection method based on multi-modal data fusion, by constructing a collaborative fusion system of an adaptive spatial-temporal characteristic calibration network and a layered information entropy screening mechanism, the core technical problems of misalignment of multi-modal data dynamic alignment and redundant interference accumulation are solved.

The invention discloses an indoor air quality monitoring method and system based on multi-dimensional analysis, and belongs to the technical field of air quality monitoring. The indoor air quality monitoring method based on multi-dimensional analysis comprises the steps that various data of a chemical sensor, an optical sensor and an acoustic sensor are collected; preprocessing the data, including unifying sampling frequency and normalizing different data formats; performing multi-dimensional feature extraction to obtain a multi-modal feature; carrying out feature fusion by adopting a machine learning algorithm; the air quality state is evaluated based on the fusion features; through multi-source data fusion analysis, the problems of one-sided monitoring result and insufficient reliability of a single sensor are solved, the monitoring accuracy and reliability are improved, and the method can be widely applied to scenes such as smart homes and office buildings.

The invention provides an integrated dynamic drug metabolism monitoring and early warning system, and relates to the technical field of drug metabolism monitoring and early warning, the integrated dynamic drug metabolism monitoring and early warning system comprises a data acquisition module, a data processing module, a model construction module, an early warning mechanism module and a user interaction module, the data acquisition module is composed of an optical sensor, a chemical sensor and an electrophysiological sensor, according to the system, the concentration of drugs and related physiological parameters are monitored in real time, different types of biological signals are captured, and the sensitivity and selectivity of the sensors are considered in the design of the data acquisition module so as to ensure the stability and accuracy in different physiological states. Drug concentration and physiological parameters are monitored in real time from multiple dimensions, sensors select and cooperate to form an efficient acquisition network according to performance expression, data quality is optimized in combination with a multi-source data fusion algorithm (such as Kalman filtering and a weighted average method), and a data processing module adopts a statistical analysis algorithm to clean standardized data.

The invention relates to a flexible electrochemical pH sensor as well as a preparation method and application thereof. Wherein the flexible electrochemical pH sensor comprises a flexible nanofiber substrate as well as a working electrode and a reference electrode which are arranged on the surface of the flexible nanofiber substrate at an interval, the working electrode comprises a first working part and a first wire part connected with the first working part, and the first working part is provided with a polyaniline sensitive layer. The flexible electrochemical pH sensor has the characteristics of high sensitivity, good flexibility and good air and moisture permeability, can be tightly attached to the surface of skin to monitor the pH value of body fluid, and is high in monitoring accuracy and simple in manufacturing method.

The invention provides an online monitoring method for product quality in a solid waste recycling process, and belongs to the technical field of solid waste recycling. A parameter acquisition system is constructed to synchronously acquire a multi-parameter matrix, a sampling rate determination function is applied to realize dynamic adjustment of a sampling frequency, and a solid waste component migration equation is utilized to analyze a substance conversion rule; a spectrum fusion optimization function is used for processing various spectrum data, an FWM model is used for achieving product quality multi-dimensional evaluation, the heavy metal content is monitored in combination with an electrochemical sensor network, a comprehensive quality evaluation result is finally formed, an updating sampling rate is output through the FWM model, a function weight coefficient is determined, online monitoring closed-loop control is formed, and the comprehensive quality evaluation result is obtained. Real-time, accurate and comprehensive monitoring of the quality of solid waste recycling products is realized, the problem of key process transition point data missing caused by fixed frequency sampling is effectively solved, and reliable technical support is provided for optimization of the solid waste recycling process.

The invention relates to the technical field of new energy station environment monitoring, in particular to a new energy station environment monitoring system and method based on a chemical sensor, and the system comprises an edge calculation unit which carries out the fusion use of a plurality of sensors, and dynamically adjusts the data standardization parameters. The real-time performance is improved, different working conditions are adapted, the influence caused by repeated data is reduced, the abnormal judgment threshold value is dynamically adjusted according to real-time data fluctuation and seasonal change, the limitation of a traditional static threshold value is avoided, it is ensured that the precision of the sensor is always in the optimal state, and the accuracy of the sensor is improved. Errors caused by environmental changes are reduced, reliability and maintenance efficiency of the system are improved, sensor faults are recognized, it is guaranteed that even if individual sensors fail, the system can still provide reliable data support through correlation analysis, and energy consumption is reduced and power generation efficiency is improved.

The invention discloses a method for detecting cadmium ions and lead ions in a water body by utilizing a screen-printed electrode electrochemical sensor, which comprises the following steps of: constructing the screen-printed electrode electrochemical sensor by taking a screen-printed electrode of which the surface of a reaction end is modified with a ZIF-8 / MWCNT nano composite material as a working electrode; the method comprises the following steps: detecting the peak current change of a to-be-detected cadmium / lead ion solution by using a screen-printed electrode electrochemical sensor, and calculating the concentrations of cadmium ions and lead ions in the to-be-detected cadmium / lead ion solution by using a linear regression equation of the cadmium ion concentration, the lead ion concentration and the peak current change. The method provided by the invention has the advantages of simple operation, low cost, high detection efficiency, high detection accuracy and the like, can realize on-site detection of cadmium ions and lead ions in a water body, and has the advantages of convenient operation, high accuracy, strong anti-interference capability to interference factors, and good application prospect. The method is of great significance to efficient detection of heavy metal cadmium ions and lead ions in the water environment.

An electrochemical sensor extracts information from biofluid systems by harnessing a nonlinear dynamic electrochemical model and stochastic voltage or current input. It uses a black-box approach that describes the fluid's state and predicts its evolution over time using a collection of model parameters, nonlinear dynamic measurement modes, and modeling techniques. For example, the sensor can use principal component analysis to reduce the set of (potentially hundreds) of model parameters to a handful of latent variables which evolve independently of each other. The sensor can use a set of these latent variables as a description of the state of the fluid. For a given sample fluid (e.g., milk containing contaminants), the sensor collects trajectories of the fluid state over time under varying conditions, permitting the training of a machine learning model to predict either fluid state trajectories or time until the fluid state crosses a given threshold (e.g., spoilage).

The invention discloses an electrochemical sensor calibration method and equipment. The method comprises the following steps: acquiring probe data, temperature and humidity data and gas characteristic data of a sensor to be calibrated; according to the probe data, constructing a dynamic updating model for dynamically updating the zero data of the sensor to be calibrated; according to the temperature and humidity data, constructing a temperature and humidity compensation model for performing temperature and humidity compensation on the to-be-calibrated sensor; according to the gas characteristic data, a multi-gas correction model is constructed, and the multi-gas correction model is used for correcting output data when the sensor to be calibrated is in different gas types; the dynamic updating model, the temperature and humidity compensation model and the multi-gas correction model form a calibration model of the sensor to be calibrated; and calibrating the to-be-calibrated sensor according to the calibration model to obtain a calibration result which is used for indicating the to-be-calibrated sensor to be calibrated and then output. The output data of the sensor to be calibrated in different gas types can be corrected, and the problem that accurate measurement cannot be achieved in a multi-gas interference scene is solved.

The invention discloses a nitrite electrochemical sensor based on a graphene oxide and polytromethamine composite material and a preparation method and application thereof, and belongs to the field of electrochemical method detection, the preparation method comprises the following steps: uniformly dispensing a graphene oxide suspension on the surface of a glassy carbon electrode, and airing to obtain GO / GCE; putting the GO / GCE, a saturated calomel electrode and a platinum wire electrode into an electrolyte containing tromethamine with a certain concentration, and carrying out electropolymerization by adopting a cyclic voltammetry to obtain Poly (Tris) / GO / GCE; a saturated calomel electrode is used as a reference electrode, a platinum wire electrode is used as a counter electrode, Poly (Tris) / GO / GCE is used as a working electrode, and the nitrite electrochemical sensor is constructed and is more accurate and sensitive in nitrite detection, the linear detection range is 2 * 10 <-6 >-6 * 10 <-3 > mol / L, and the detection limit is 1.00 * 10 <-7 > mol / L.

Embodiments herein relate to optical chemical sensor systems that can be wearable and include microneedle arrays. In an embodiment, a chemical sensing device is included having a set of microneedles and a sensor element. The sensor element can include a first low-index gel layer, a second low-index gel layer, and a chromoionophore sensing film disposed between the first low-index gel layer and the second low-index gel layer. In an embodiment, a delay layer can be disposed between the sensor element and the set of microneedles. An optical emitter can be configured to emit light into the sensor element. An optical detector can be configured to receive light from the sensor element. Other embodiments are also included herein.

The invention discloses a flood season river pollution early warning system and method, and relates to the technical field of environmental monitoring, the system comprises a microbial electrochemical sensor module, a current monitoring and data analysis module, a multistage early warning trigger module, a chemical detection auxiliary module, and a data transmission and storage module, through the microbial electrochemical sensor network, water samples on the surface layer, the middle layer and the bottom layer of a river can be collected at the same time, the toxicity index of composite pollutants is analyzed in real time by means of metabolic activity changes of electroactive flora, the comprehensiveness of monitoring of the river pollution condition is greatly improved, meanwhile, the current pulse frequency is monitored in real time, and the toxicity index is rapidly analyzed; and by matching with a preset accurate threshold value of the early warning trigger module, an early warning mechanism can be quickly triggered once the pollution condition reaches an early warning standard, so that the early warning timeliness is greatly improved, the time interval from pollution occurrence to early warning sending is shortened, and precious time is won for taking pollution prevention and control measures in time.

The invention discloses a zwitterionic polymer, an electrochemical sensor and a preparation method and application of the zwitterionic polymer, the zwitterionic polymer is a sulfobetaine type zwitterionic polymer and has high hydrophilicity and electric neutrality, and a hydration layer can be formed on the surface of the zwitterionic polymer through the solvation effect, the hydrogen-bond effect and the like of charged functional groups. The surface of the hydration layer can effectively resist non-specific adsorption, has high anti-pollution performance, and has huge application potential in the field of anti-pollution electrochemical sensors. The invention further provides an electrochemical sensor, the anti-fouling layer formed by the zwitterionic polymer on the electrochemical sensor can effectively resist non-specific adsorption, has high anti-fouling performance, and can reduce and eliminate signal interference in actual sample detection, so that sample pretreatment work is reduced, and the detection accuracy is improved. The method has the characteristics of high anti-interference capability, good reproducibility and the like in chloramphenicol detection.

A system may include a flow valve coupled to a gas inlet of a landfill gas system and a pump coupled to the flow valve and configured to draw gas from the landfill gas system via the gas inlet. The system may further include an oxygen sensor comprising at least one laser configured to detect oxygen concentration in the gas, a carbon dioxide sensor comprising at least one infrared light source configured to detect carbon dioxide concentration in the gas, and / or one or more chemical sensors configured to sense concentrations of a respective one or more chemicals in the gas. A microprocessor may determine sensed data including at least the oxygen concentration, the carbon dioxide concentration, concentrations of the one or more chemicals, the static pressure, the atmospheric pressure, and / or a differential pressure, and communicate the sensed data to a mobile control device.

The present invention provides a fluorescent chemical sensor array for detecting infant formula milk powder and a method for detecting infant formula milk powder using the same. The fluorescent chemical sensor array includes the following sensor units: a first sensor unit, which is a compound having the structure shown in Formula I (i.e., PPE2); a second sensor unit, which is a compound having the structure shown in Formula II (i.e., PPE-SO3); and a third sensor unit, which is a compound having the structure shown in Formula III (i.e., PPE-N1). In Formula I, Formula II, and Formula III, n is independently 9-60. The present invention can use the fluorescent chemical sensor array and the LDA pattern recognition algorithm to detect and distinguish different types, different origins, and different brands of infant formula milk powder, and can optimize the sensor array to achieve the purpose of differentiating detection with the least number of sensing units.

The invention discloses a preparation method of an electrochemical biosensor based on neuraminidase, and relates to the field of electrochemical sensors. The method comprises the following steps: preparing N-Gr / MWCNTs, preparing N-Gr / MWCNTs (at) GCE, preparing Ppy / N-Gr / MWCNTs (at) GCE, and preparing NA / Ppy / N-Gr / MWCNTs (at) GCE. According to the electrochemical biosensor based on neuraminidase, MWCNTs and N-Gr are compounded to form an N-Gr / MWCNTs composite material, high-conductivity polypyrrole is polymerized on the N-Gr / MWCNTs composite material through pyrrole, the biosensor without a mediator is prepared, electrons can be directly transmitted between an electrode and a bioactive substance, and the electrochemical biosensor can be used for detecting neuraminidase. The response performance of the sensor is obviously improved; the electrochemical biosensor is based on the NA inhibition principle, is mainly used for rapidly screening antiviral components in traditional Chinese medicines, can realize rapid screening and evaluation of the antiviral components in the traditional Chinese medicines, belongs to a convenient, efficient and low-cost means, and also provides scientific basis and technical support for discovery and evaluation of active components.

The invention discloses a wearable micro-fluidic sweat detection system which comprises a bionic micro-fluidic chip which comprises a chip body, a sweat inlet, a sweat outlet and a plurality of bionic detection cavities, the sweat inlet, the sweat outlet and the bionic detection cavities are formed in the chip body, and the bionic detection cavities are communicated end to end. Each bionic detection chamber comprises a bionic detection chamber body, an outer side micro-column array and an inner side micro-column array, the outer side micro-column array and the inner side micro-column array are concentrically arranged in the bionic detection chamber body, the outer side micro-column array comprises a plurality of outer side micro-columns which are uniformly arranged at intervals in the circumferential direction, and the inner side micro-column array comprises a plurality of inner side micro-columns which are uniformly arranged at intervals in the circumferential direction; the multi-parameter electrochemical sensor comprises a substrate and a plurality of detection electrodes arranged on the substrate, and one ends of the plurality of detection electrodes are in one-to-one correspondence contact with the plurality of bionic detection chambers respectively; and the wearable equipment is connected with the other ends of the plurality of detection electrodes. According to the invention, uniform and stable liquid supply can be provided, the accuracy of a detection signal is ensured, and high-precision detection of Na < + >, K < + > and Cl <-> can be realized.

Embodiments herein relate to an optical chemical sensor system that is wearable and includes a microneedle array. In one embodiment, the invention includes a chemical sensing device having a set of microneedles and sensor elements. The sensor element may include a first low refractive index gel layer, a second low refractive index gel layer, and a chromogenic ionophore sensing film disposed between the first low refractive index gel layer and the second low refractive index gel layer. In one embodiment, a retardation layer may be disposed between the sensor element and a set of microneedles. An optical emitter may be configured to emit light into the sensor element. An optical detector may be configured to receive light from the sensor element. Other embodiments are also included herein.

The invention provides a molecularly imprinted electrochemical sensor for hippuric acid detection, a preparation method and a segmented response technology, and belongs to the technical field of electrochemical sensors. Based on functional monomers aniline and o-phenylenediamine, hippuric acid is taken as a template molecule, and the molecularly imprinted electrochemical sensor for detecting hippuric acid is prepared by an electrochemical polymerization method, and combines the advantages of a molecular imprinting technology and an electrochemical technology; the hippuric acid detection sensor has excellent sensitivity, fast response time and specific recognition capability, has good signal response to hippuric acid detection under different concentrations, generates a good electric signal in a hippuric acid solution of 0-100 nM, forms a better linear relationship between the electric signal generated in the hippuric acid solution with the concentration of 100 nM or above and the concentration, and can be applied to the detection of hippuric acid with the concentration of 100 nM or above. The signal response and detection range of the molecularly imprinted electrochemical sensor under high concentration is widened, and the molecularly imprinted electrochemical sensor is suitable for hippuric acid detection in a wide range.

The invention provides a flexible electrochemical sensor, a preparation method and application. The flexible electrochemical sensor comprises a flexible substrate, three electrodes, a conductive strip, an external wire and a multi-cavity polypyrrole film, the three electrodes comprise a working electrode, a reference electrode and an auxiliary electrode and are printed on the flexible substrate; the conductive strip is connected with the three electrodes, the conductive strip is packaged through an insulating tape, and only working areas of the three electrodes are exposed; the external wire is pasted on the conductive strip through conductive silver adhesive. The multi-cavity polypyrrole film is modified on the surface of the working electrode. The technical problems that existing equipment is insufficient in portability, cannot meet the requirements of on-site rapid screening and real-time analysis of large-batch samples, and is difficult to realize on-site mobile detection are solved. The invention provides a feasible technical means for portable, mobile and on-site rapid detection of high-harm heavy metal ions such as Hg < 2 + > and Cd < 2 + >, and the method is simple to operate and extremely low in cost.

The invention belongs to the technical field of electrochemical sensors, and particularly relates to a cobalt-based modified industrial solid waste vinegar residue derived carbon composite material and a preparation method and application thereof. The preparation method comprises the following steps: washing, drying, crushing and sieving industrial waste vinegar residues to obtain vinegar residue powder; carbonizing the vinegar residue powder in an inert atmosphere to obtain carbonized vinegar residues; the carbonized vinegar residues are mixed in a hot alkali solution for activating treatment, and then Co3O4 is derived through inorganic cobalt salt in-situ growth ZIF-67, so that the cobalt-based modified industrial solid waste vinegar residue derived carbon composite material is obtained. Porous activation is carried out on the surface of the carbonized vinegar residues through hot alkali, rich protruding wrinkles and pores are formed, the surface area is increased, rich nitrogen components and active carbon oxygen functional groups are reserved, and the catalytic reaction activity is improved. The material is used as a sensing material to prepare a high-performance electrochemical biosensor, and the constructed electrochemical sensor is used for detecting biomolecules such as hydrogen peroxide and the like to obtain a relatively wide detection range.

The invention belongs to the technical field of biosensing, and particularly relates to a cell electrochemical sensor and application thereof in evaluating the anti-inflammatory activity of capsaicin. Sb2O4 / rGO is firstly prepared, a DDAB-HIMIMPF6 composite material with stable current response and low biotoxicity is synthesized in one step, then the DDAB-HIMIMPF6 composite material is combined with the Sb2O4 / rGO, an electrochemical sensor is used for loading, and the cell electrochemical sensor with high selectivity and high sensitivity is finally obtained and can be applied to evaluation of the anti-inflammatory activity of capsaicin. Moreover, the cell electrochemical sensor provided by the invention not only can realize the purpose of evaluating the anti-inflammatory effect of capsaicin, but also has the outstanding advantages of low cost, high detection speed, simplicity in operation and miniaturization, and has a wide application prospect.

The invention relates to an electrochemical sensor for monitoring beta cell insulin secretion in real time and a preparation method and application thereof, the sensor is an electrochemical chip modified by a multi-dimensional nano material, and the multi-dimensional nano material on the electrochemical chip is used for capturing dopamine released by beta cells; and determining the release quantity of dopamine according to the electrochemical signal. According to the method, the insulin secretion condition of the beta cells is monitored in real time by taking dopamine as a tracer agent, and the exocytosis process of the beta cells can be researched under natural and normal conditions. According to the invention, only a common Faraday cage and a basic electrochemical workstation are needed for detection, one or more beta cells can be detected, the operation is simple, and the research efficiency of insulin secretion is greatly improved. In addition, the medicine for regulating beta cell insulin secretion can be efficiently screened, and a foundation is laid for research of diabetes treatment medicine.

The invention relates to the technical field of electrochemical sensors, in particular to an electrochemical gas sensor state automatic analysis method and device and a storage medium. The method comprises the following steps: acquiring degradation data corresponding to the electrochemical gas sensor through an in-situ analysis model; preprocessing the degradation data; inputting the preprocessed degradation data into a target feature prediction model for performance simulation to obtain performance prediction data; inputting the performance prediction data into a target accelerated degradation database for degradation matching to obtain evaluation data; and classifying and correcting the state of the electrochemical gas sensor according to the evaluation data. The factors influencing the performance of the electrochemical gas sensor can be quickly obtained and corrected in a complex environment.

The invention discloses a flexible electrochemical sensor and a preparation method and application thereof. The electrochemical sensor comprises a working electrode, the working electrode comprises a carbonized fabric with high conductivity, strong electrochemical activity and large specific surface area and a functional layer arranged on the surface of the carbonized fabric, the carbonized fabric is composed of carbonized yarns, the carbonized yarns comprise carbonized fibers, the carbonized fibers contain active nitrogen and a microcrystalline graphite phase, and the functional layer is arranged on the surface of the carbonized fabric. The fibers comprise at least one of wool and silk; a counter electrode; a reference electrode; a lead; the working electrode, the counter electrode, the reference electrode and the wire are positioned on the surface of the flexible substrate and form a three-electrode system. The flexible electrochemical sensor has the advantages of low cost, simple process, high sensitivity, wide linear detection range, strong anti-interference capability and the like, can be directly attached to skin or attached to other wearable pads, and realizes wearable monitoring of lactic acid, glucose, ethanol or uric acid and other biomarkers in sweat.

The invention discloses a dual-emission molecular imprinting ratiometric fluorescence sensor, a preparation method thereof and application of the dual-emission molecular imprinting ratiometric fluorescence sensor in aureomycin detection, and belongs to the technical field of chemical sensors. The preparation method of the sensor comprises the following steps: preparing silicon dioxide-quantum dot composite nanoparticles, and preparing a molecularly imprinted polymer by taking salicylamide as a template molecule; and mixing the molecularly imprinted polymer and the silicon dioxide-quantum dot composite nanoparticles in an HEPES buffer solution by adopting a post-mixing strategy to construct the dual-emission molecularly imprinted ratiometric fluorescence sensor. The double-emission molecular imprinting ratiometric fluorescence sensor has the beneficial effects that the double-emission molecular imprinting ratiometric fluorescence sensor provided by the invention is rich in fluorescence color change, rapid, high-sensitivity and visual detection of aureomycin can be realized, the whole detection process is simple, convenient and rapid, and the double-emission molecular imprinting ratiometric fluorescence sensor is suitable for being widely popularized in practical application.

The invention relates to conductive hydrogel, which is CS hydrogel of Ga grafted MXene, Ga is liquid metal gallium, MXene is Ti3C2Tx, Tx is-F,-OH or-O, CS is chitosan, a two-dimensional sheet structure of single-layer MXene provides a chain, and adjacent chains are connected through liquid metal Ga spheres to provide a three-dimensional chain structure of the conductive hydrogel. The invention also relates to the conductive hydrogel, a preparation method thereof, a flexible electrochemical sensor and application of the flexible electrochemical sensor in glucose detection. According to the invention, disease markers such as glucose in human sweat can be rapidly detected with high sensitivity for a long time, the operation is simple, professional workers are not needed, and real-time daily monitoring can be realized.

The invention relates to a samarium molybdate / reduced graphene oxide electro-catalytic material, a preparation method and application thereof and an electrochemical sensor, and relates to the technical field of electro-catalytic materials and electrochemical sensors, the preparation method comprises the following steps: dispersing GO in water, and stirring to obtain a GO suspension; the preparation method comprises the following steps: separately adding Sm (NO3) 3.6 H2O and Na2MoO4. 2H2O into water for ultrasonic dissolution, and mixing to obtain a first mixture; stirring and mixing the GO suspension and the first mixture to obtain a second mixture, and the like. The samarium molybdate / reduced graphene oxide electro-catalytic material is synthesized by a hydrothermal synthesis method and is used for modifying a glassy carbon electrode so as to be applied to electrochemical detection of FZD for the first time. Compared with a traditional detection method, the detection method has the advantages of being simple, efficient, green, environmentally friendly, sensitive in response and portable, and a new way is provided for detection of carcinogenic residues.