59results about "Cadmium sulfides" patented technology

The invention discloses a composite sensing electrode and a preparation method and application thereof, and belongs to the technical field of environmental detection.The preparation method comprises the steps that CNC is activated, then the activated CNC is modified with a CdS cluster material, a CdS-CNC composite electrode material is obtained, then a GCE electrode is modified with the CdS-CNC composite electrode material, and a CdS-CNC-GCE composite sensing electrode is obtained; the invention also discloses the CdS-coated CNC-GCE composite sensing electrode prepared by the method and application of the composite sensing electrode in detection of heavy metal elements in an aqueous solution. The CdS-coated CNC-GCE composite sensing electrode has the beneficial effects that an effective technical method and way are provided for improving the electrode performance of a heavy metal sensor, the prepared CdS-coated CNC-GCE composite sensing electrode is high in anti-interference performance and good in stability, the content of various heavy metals can be timely and rapidly detected, and the purpose of dynamically monitoring the change of the content of the heavy metals in the production activity period is achieved.

The present invention discloses a method for photocatalytic dehydration condensation of biomass platform small molecule furfural and its derivatives with aldehydes / ketones. The method uses water-soluble cadmium sulfide quantum dots doped with proline as a photocatalyst, and biomass platform small molecule furfural and its derivatives and aldehydes / ketones as substrates, aiming to achieve photocatalytic dehydration condensation of biomass platform small molecule furfural and its derivatives with aldehydes / ketones in an aqueous phase system. The photocatalyst of the present invention is synthesized using cheap and easily available raw materials by a simple and easy-to-operate experimental method. This photocatalytic reaction does not require the use of noble metal materials as co-catalysts, and can achieve dehydration condensation to construct C═C under mild conditions. The products can be applied in fields such as spices and aviation fuel.

The invention relates to the field of nano materials and photonic crystal materials, in particular to nano particles, preparation of the nano particles and application of the nano particles in self-assembly of three-dimensional non-close-packed photonic crystals. The nanoparticles can be self-assembled into a three-dimensional non-close-packed photonic crystal in a concentration range of 1 wt%-60 wt%. According to the invention, the problem that the self-assembly of the three-dimensional non-close-packed colloid photonic crystal is difficult to realize at low concentration at present is solved. By adjusting the mass fraction of the particles in a solution, the three-dimensional non-close-packed colloidal photonic crystal with rich colors can be formed through self-assembly, and the three-dimensional non-close-packed colloidal photonic crystal has wide application prospects in the fields of sensing, display and the like.

This disclosure relates to a process for removing cadmium and copper, and optionally arsenic, from phosphoric acid solutions typically obtained by wet methods. The process can also allow for the selective and separate recovery of cadmium, copper, and arsenic.

This invention discloses a superhydrophobic unsaturated transition metal chalcogenide compound, its synthesis method, and its applications. The invention involves heating chalcogenide powder to above its melting temperature to form a molten chalcogenide. This molten chalcogenide is then mixed with a reducing agent to undergo a disproportionation reaction. A strongly acidic solution containing transition metal cations is then added for aging, yielding a transition metal chalcogenide compound with a uniform porous structure, numerous surface defect sites, and a superhydrophobic surface. This transition metal chalcogenide compound exhibits good water resistance and high selective adsorption performance for nonpolar atoms and molecules, making it suitable for the removal of heavy metals or oxides from high-humidity flue gas. Furthermore, its unique porous structure and numerous catalytically active sites demonstrate good adsorption, capture, and catalytic conversion activity for oxidizing gases, making it suitable as an electroreduction catalyst.

This invention discloses a cubic spinel-structured sulfide composite gas-sensitive material, a gas sensor, its preparation method, and its application, belonging to the field of gas sensor technology. The preparation method of this composite gas-sensitive material involves using FeCl2, CdCl2, and InCl3 as metal sources, and thiourea as a sulfur source, placing them together in a solvent of water, adding citric acid or sodium citrate as a dispersant, and obtaining a precursor material through a hydrothermal reaction. After calcination and annealing, a cubic spinel-structured FeIn2S4 / CdIn2S4 heterojunction material powder is obtained. The two gold electrodes and the ceramic tube of the gas sensor are coated with the cubic spinel-structured sulfide composite gas-sensitive material. The gas sensor based on this invention, made from a cubic spinel-structured sulfide composite gas-sensitive material, has a simple manufacturing process, low production cost, and is suitable for industrial mass production. It has broad application prospects in the field of acetone detection in trace hazardous situations.

The present invention relates to a method for removing cadmium and copper and optionally arsenic contained in phosphoric acid solutions typically obtained in wet processes. The process also enables selective and separate recovery of cadmium, copper and arsenic.

The invention discloses a composite material and a preparation method thereof, a photoelectric device and a display device, and relates to the technical field of display. The composite material comprises inorganic nanoparticles and a complex, wherein the complex comprises phytic acid and metal ions. According to the composite material provided by the invention, the complex can avoid agglomeration of the inorganic nanoparticles and improve the stability of the inorganic nanoparticles, so that the stability of the device is improved.

This invention belongs to the field of photoelectrochemical detection, specifically relating to a method for fabricating a photo-assisted all-solid-state zinc-air battery self-powered sensor based on a signal reversal strategy and its application in detecting theophylline. Using CuInS2 as the photocathode, CdS is loaded onto the photocathode using a split aptamer technique. Polished zinc foil is used as the anode, and PVA gel polymer is used as the solid electrolyte to construct a photo-assisted all-solid-state zinc-air battery self-powered sensor based on a signal reversal strategy. This invention achieves signal reversal by incorporating split aptamer technology, thereby significantly improving the detection sensitivity for antioxidants. The constructed photo-assisted all-solid-state zinc-air battery self-powered sensor based on a signal reversal strategy also has a wide detection range, low detection limit, and low detection cost.

The invention discloses a synthesis method of monodisperse urchin-shaped CdS, which comprises the following steps: S1, adding deionized water, a cysteine solution and a chromium salt solution into a reaction container, stirring and mixing, and introducing N2; s2, adding a sodium citrate solution into the solution obtained in the step 1, and stirring and mixing; s3, dropwise adding an alkaline solution into the mixed solution obtained in the step 2, and adjusting the pH value of the solution to 9-11; and S4, heating the solution of which the pH is adjusted in the step 3, and performing reflux reaction to obtain the sea urchin-shaped CdS. By adding a first ligand (cysteine), Cd < 2 + > is fixed in a (cysteine-Cd < 2 + >) n coordination polymer, so that the reaction activity of a precursor can be reduced, and a nucleation process occurs under a mass action law in the initial stage of reaction; and secondly, for the formed CdS, through combination of a second ligand (sodium citrate), electrostatic repulsion and steric hindrance effect between the CdS are remarkably increased, so that adsorption and fusion between the CdS are avoided.

The invention belongs to the technical field of photocatalyst composite materials, and particularly relates to a covalent bond bonded MoBTx / CdS composite material and a preparation method and application thereof.According to the MoBTx / CdS composite material, rod-shaped CdS and two-dimensional layered MoBTx are compounded through an in-situ growth strategy, covalent bonding between Mo atoms and S atoms is achieved at an interface, and the MoBTx / CdS composite material is obtained. Therefore, a strong-coupling heterogeneous interface is constructed. The covalent bond mediated composite structure can significantly enhance visible light absorption and optimize carrier separation and transmission kinetics, thereby improving the activity and stability of hydrogen production by photocatalytic decomposition of water. The material is excellent in environmental adaptability and can keep good hydrogen evolution performance under complex water quality and low-temperature conditions. The research provides a new interface engineering idea for designing an efficient and stable semiconductor-metal boride photocatalyst.

A system for producing agglomerated cadmium sulfide (CdS) nanospheres for supercapacitor electrode applications, comprising: a) a precursor production unit configured to maintain aqueous solutions of cadmium chloride monohydrate (CdCl2.H2O) and sodium sulfide (Na2S) at a concentration of 0.5 M; b) a reaction unit configured to combine the cadmium and sulfide precursors and maintain the reaction conditions at 80 °C to precipitate CdS nanospheres, the reaction unit comprising a temperature controller configured to maintain the temperature of the reaction unit; c) a stirring unit with a gear motor configured to continuously stir the reaction unit at 1050-1100 rpm to ensure uniform growth of the agglomerated nanospheres; d) a purification unit connected to the reaction unit and designed to receive, filter and wash precipitated CdS nanospheres with a filter component based on alcohol and double distilled water; (e) a heat treatment unit connected to the purification unit and configured to dry the CdS precipitate at 60 °C and anneal it at 450 °C to form pure cadmium sulfide; and f) an electrode preparation unit configured to deposit the CdS nanospheres on nickel foam substrates for electrochemical applications.

The application relates to a preparation method and application of chiral two-dimensional cadmium sulfide nanosheets. The application aims to solve the problem that it is difficult to construct non-layered chiral two-dimensional inorganic nanomaterials. The method comprises the following steps: placing a first open reaction container and a second open reaction container in a sealable container, adding a cadmium acetate solution into the first open reaction container, then adding a left-rotational ibuprofen / chloroform solution drop by drop, adding a sodium sulfide aqueous solution into the second open reaction container, then adding a hydrochloric acid solution drop by drop, and finally sealing and standing. The application is used for preparing a circularly polarized light detection device for detecting left-rotational / right-rotational circularly polarized light. The application is used for the preparation and application of chiral two-dimensional cadmium sulfide nanosheets.

The application belongs to the technical field of nano material heterojunction, and particularly relates to a NiO / CdS nanoparticle heterojunction array and a preparation method and application thereof. The application comprises a substrate and a NiO / CdS heterojunction array in-situ grown on the surface of the substrate; the substrate is an Al2O3 gas sensitive substrate; the NiO / CdS heterojunction array is composed of NiO nanosheets and CdS nanoparticles, wherein the NiO nanosheets are in an array structure of vertical interlaced growth, and the CdS nanoparticles are uniformly dispersed on the surface of the NiO porous nanosheets. The preparation process of the application is simple, and the cost is low. The NiO / CdS heterojunction array prepared by the application has good heterojunction interface contact, and the size and distribution density of the CdS nanoparticles in the NiO / CdS heterojunction array can be conveniently regulated. In addition, the NiO / CdS nanoparticle heterojunction array can be applied in room temperature gas sensing, and specifically in high selectivity detection of triethylamine at room temperature under green light excitation.

The application belongs to the field of electrochemical detection, and particularly relates to a novel water-vapor coupling photoelectric self-powered electrochemical sensor for detecting enrofloxacin and a preparation method thereof. A glass substrate is used as a substrate, a copper foil tape is used as a positive electrode and a negative electrode, CdS (cadmium sulfide) and a cobalt-based metal organic framework (ZIF-67) are used as water-vapor / photovoltaic materials to construct a heterojunction for preparing a water-vapor generator to realize sustainable power generation. The CdS / ZIF-67 heterojunction is beneficial to the separation of photo-generated carriers under illumination and synergistically enhances the water evaporation effect. An enrofloxacin (ENR) aptamer is assembled to construct a water-vapor / photovoltaic self-powered electrochemical sensor. With the help of split aptamers, the ENR detection exhibits high sensitivity and high specificity, and provides a new strategy for self-powered electrochemical detection. The water-vapor / photovoltaic self-powered electrochemical sensor has a wide detection range, high sensitivity and low detection limit.

The invention discloses an Au-Pd / CdS nanorod and a synthesis method thereof, and the synthesis method comprises the following steps: S1, dissolving Cd (NO3) 2.4 H2O and thiourea in ethanediamine according to a molar ratio of 1: (2.5-3.5), and carrying out a hydrothermal reaction at 180-200 DEG C for 18-36 h to prepare a CdS nanorod; and S2, dispersing the CdS nanorods in water, adding a mixed solution containing HAuCl4. 3H2O and PbCl2, regulating the molar ratio of Au to Pd to be (1: 9)-(9: 1), stirring and adsorbing for 8-12 hours, adding NaBH4, reducing for 10-15 hours at room temperature, and washing and drying to obtain the Au-Pd / CdS composite catalyst.

The invention discloses a quantum rod with stable chirality and a preparation method thereof.The preparation method of the quantum rod with stable chirality comprises the steps that zinc stearate is dissolved in octadecene under the high-temperature condition, a selenium source is added to form a Se-TOP solution, and a ZnSe core solution is successfully prepared; purifying the ZnSe core, and dispersing the ZnSe core in a TOP solution to obtain a ZnSe-TOP core mother solution; then, the ZnSe-TOP core mother liquor is added into a reaction solution composed of a Cd precursor and a sulfur precursor, epitaxial growth is carried out under the high-temperature condition, and ZnSe / CdS quantum rods with different length-diameter ratios are obtained; and carrying out ligand exchange reaction on chiral cysteine and the surface of the quantum rod to obtain the II-type chiral ZnSe / CdS quantum rod. The prepared II-type quantum rod has good optical performance and stable chiral effect, and the chiral optical effect is not affected by the space structure of the core / shell structure of the quantum rod.

The invention provides a sulfur defect CdS quantum dot and a preparation method and application thereof.The preparation method of the sulfur defect CdS quantum dot comprises the steps that a sulfur source and a Cd precursor solution are mixed, and a mixed solution is obtained; under an inert atmosphere, heating the mixed solution to 100-180 DEG C, carrying out a constant temperature reaction for 0.5-3 h, cooling to 20-30 DEG C at a cooling rate of 2.5-5.5 DEG C / min, and filtering to obtain the sulfur defect CdS quantum dot, the pH value of the Cd precursor solution is greater than or equal to 10. The preparation method provided by the invention is simple in process, the sulfur defect CdS quantum dots with high catalytic activity can be obtained without precious metal catalysis, and the sulfur defect CdS quantum dots have excellent light reforming performance and hydrogen evolution activity on plastics.

The invention provides a method for recycling all components of a retired cadmium telluride thin-film solar cell, which comprises the following steps of: (1) mechanically dissociating a main body part of the solar cell to obtain front glass, back glass and wires enriched with Cd, Te and Sn, and directly recycling the back glass and the wires; (2) vulcanizing the front glass, and washing with water to obtain clean glass and tellurium-cadmium-tin mixed powder; (3) performing vacuum distillation on the tellurium-cadmium-tin-rich powder to obtain high-purity tellurium and cadmium-rich tin slag; and (4) the cadmium-rich tin slag is leached through a Na2S or NaHS solution, and CdS sediment and a Na2SnS3 solution are obtained. According to the method, the retired cadmium telluride thin-film solar cell is treated through a dry-wet combined method, and a multi-layer coating material is recycled in an echelon manner. Wherein the recovery rates of tellurium, cadmium and tin are all more than 98%, the glass substrate can be recovered by 100%, the purity of the obtained tellurium product reaches more than 99.9%, and the purity of the cadmium and tin products exceeds 98%. The method has the advantages of thorough component recovery, simple process flow, high added value of products and the like, and has a relatively good application prospect.

The invention relates to the technical field of composite materials, in particular to a CdS-NiCo-LDH composite material and a preparation method and application thereof. According to the preparation method disclosed by the invention, NiCo-LDH is firstly obtained through hydrothermal reaction, and then CdS nanodots are introduced into NiCo-LDH interlayers through electrochemical reaction and in-situ vulcanization, so that the interlayer spacing is increased, and OH <-> transportation is facilitated; due to the construction of the CdS nanodots, the conductivity of the CdS nanodots is improved, electron migration of the CdS nanodots is facilitated, and electrochemical reaction active sites are increased. Meanwhile, the in-situ synthesis method not only avoids the adverse effect of secondary growth, but also reduces the volume expansion of NiCo-LDH in the oxidation-reduction reaction process.

The present application relates to the technical field of inorganic nanometer catalyst material manufacturing, and particularly relates to a multi-legged nanocrystal for photocatalytic reforming of biomass and derivatives thereof to produce hydrogen as well as a preparation method and application thereof. The multi-legged nanocrystal takes spherical quantum dots as a core, and grows multiple nanometer arms on the surface of the core under the regulation of a surfactant. The specific surface area of the multi-legged nanocrystal is large, and more surface active sites can be exposed, so as to improve the migration efficiency of photo-generated carriers. Meanwhile, the nanometer arms can effectively solve the problems of electron and hole recombination and electron migration in photocatalysis. As the main light absorption unit, the nanometer arms absorb photons, generate electrons, and make the electrons gather on the nanometer arms, thereby inhibiting the recombination of electrons and holes and accelerating the photocatalytic reaction and improving the photocatalytic efficiency. The size of the multi-legged nanocrystal is adjustable, and the stability is good, so that the problem of photo corrosion in photocatalysis can be effectively alleviated.

The invention discloses a high-efficiency and low-cost sulfide nanomaterial and a preparation method thereof. The nanomaterial is zinc sulfide or cadmium sulfide. The preparation method of the nanomaterial comprises the following steps: adding 0.001-0.002g of a surfactant to 20-50ml of water with a live bacteria content of 10,000-20,000 / ml, heating the mixture to 80-90°C, cooling the mixture to room temperature, adding 0.02-0.027g of a sulfur source, and stirring and mixing the mixture to obtain a material A; dissolving 0.1-0.3g of a zinc source or a sulfide source in 30-50ml of an aqueous solution containing 0.001-0.002g of a surfactant, and then adding 1-2mg of trypsin, stirring and mixing the mixture to obtain a material B; adding 2-4ml of octanol to the material A, mixing the mixture to obtain a mixed solution, and then allowing the mixture to stand, and dropwise adding 10ml of the mixed solution. 0.2 mol / L sodium hydroxide solution and material B are added dropwise for 5-8 min. After the addition is completed, the mixture is filtered, washed with water, washed with alcohol, and dried to obtain a nanomaterial. The present invention overcomes the shortcomings of the prior art, and the method is not only applicable to zinc sulfide, but also to cadmium elements in the same family as zinc, thereby expanding the scope of application of the method.

The invention discloses CdS nano-particles with controllable lattice strain and a preparation method and application thereof, and relates to the technical field of electrocatalysts.The preparation method of the CdS nano-particles comprises the following steps that 1, a cadmium source and a sulfur source are subjected to a coordination polymerization reaction, and a precursor is obtained; and (2) carrying out hydrothermal reaction on the precursor to obtain the CdS nanoparticles. The coordination polymer is used as a precursor, controllable decomposition of the ligand is achieved by adjusting the hydrothermal reaction temperature, C and N co-doped CdS is induced in the hydrothermal reaction process, 0-10% controllable tensile strain is spontaneously formed in crystal lattices of the C and N co-doped CdS, and therefore excellent catalytic activity is shown in the reaction for preparing CO through electro-catalysis CO2 reduction.

The invention discloses a cubic spinel structure sulfide composite gas-sensitive material, a gas-sensitive sensor and a preparation method and application thereof, and belongs to the technical field of gas sensors. The preparation method of the composite gas-sensitive material comprises the following steps: taking FeCl2, CdCl2 and InCl3 as metal sources, taking thiourea as a sulfur source, putting the metal sources and the sulfur source into solvent water, adding citric acid or sodium citrate serving as a dispersing agent, carrying out hydrothermal reaction to obtain a precursor material, calcining, and then carrying out annealing treatment to obtain cubic spinel structure FeIn2S4 / CdIn2S4 heterojunction material powder; the two gold electrodes and the ceramic tube of the gas-sensitive sensor are coated with the cubic spinel structure sulfide composite gas-sensitive material. The gas-sensitive sensor based on the cubic spinel structure sulfide composite gas-sensitive material is simple in manufacturing process, low in preparation cost and suitable for industrial batch production, and has a wide application prospect in the field of acetone detection in trace dangerous occasions.

The application discloses a preparation method of Cu2S-CdS heterojunction nanosheet, and specifically comprises the following steps: (1) vacuum heating of CuSCN and oleylamine, saturated Ar is introduced, heating reaction is carried out, cooling to room temperature, adding toluene and methanol, centrifugation, washing, drying, and obtaining Cu2S hexagonal nanosheet; (2) mixing Cd(NO3)2 4H2O methanol solution, tetrahydrofuran, TOP and Cu2S hexagonal nanosheet toluene solution, degassing treatment, reaction in inert gas atmosphere, centrifugation, washing, ultrasonic, centrifugation, washing, dispersion, centrifugation, drying, and obtaining the product. The application does not use toxic S source, but uses CuSCN as S source and Cu source to prepare Cu2S matrix, and applies the matrix to cation exchange of electrocatalytic CO2 reduction Cu2S, and uses room temperature stirring to prepare hexagonal nanosheet with perfect morphology, uniform size and stability. The method is simple, low in cost, high in yield, small in loss and easy to prepare.

The invention discloses a method for regulating and controlling sulfur vacancies in sulfide, and relates to the field of functional materials. The preparation method comprises the following specific steps: S1, dissolving metal salt and a sulfur source in deionized water to obtain a mixed solution A; s2, adjusting the pH value of the mixed solution A to 2-5 by using a pH regulator, and adding a sulfur vacancy regulator into the mixed solution A to obtain a mixed solution B; and S3, carrying out a hydrothermal reaction on the mixed solution B, cooling to room temperature, and filtering, washing and drying the reacted solution to obtain the sulfide rich in sulfur vacancies. The sulfur vacancy regulator is introduced before hydrothermal treatment, the sulfide rich in sulfur vacancies can be directly prepared, the process is simple, the concentration of the sulfur vacancies in the sulfide can be directly regulated, and the prepared sulfide has good photocatalytic performance.

The invention relates to the technical field of photosensitive electrode materials, in particular to preparation of a cadmium sulfide-gallium oxide heterojunction-based photoelectrochemical sensor and a method for detecting tetracycline by using the cadmium sulfide-gallium oxide heterojunction-based photoelectrochemical sensor. A CdS / Ga2O3 composite material is synthesized by adopting a hydro-thermal method and is used as a substrate material for preparing a photoelectrochemical sensor. Ga2O3 with the advantages of good chemical stability, high photoelectric conversion efficiency and the like is compounded with CdS with the problems of high photo-induced electron-hole recombination rate, serious photo-corrosion phenomenon and the like to construct the S-type heterojunction photosensitive composite material, so that the photo-response range is widened, and the light energy utilization rate and the photo-induced carrier separation efficiency are improved. Due to excellent chemical stability and light corrosion resistance of Ga2O3, CdS can be effectively protected, the light corrosion phenomenon is reduced, and the long-term stability of the photoelectrochemical sensor is enhanced. The photoelectrochemical sensor constructed by the invention realizes high-sensitivity detection of tetracycline within a wide linear range of 1 [mu] M to 50 [mu] M, and has the advantages of low preparation cost, stable photoelectric response, good repeatability and the like while the detection limit is as low as 0.045 [mu] M.

In one aspect, the disclosure relates to methods for preparing compositions comprising a chiral nanostructure, wherein the nanostructure comprises a semiconductor material, the method comprising admixing a chiral ligand, optionally a metal salt, and at least one inorganic-material forming precursor in a nonpolar organic solvent. Also disclosed herein are compositions and articles comprising the chiral nanostructures and methods for performing biological imaging using the chiral nanostructures. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

The application relates to the technical field of composite materials, in particular to a CdS-NiCo-LDH composite material and a preparation method and application thereof. In the application, NiCo-LDH is obtained through a hydrothermal reaction, then CdS nanodots are introduced into the interlayer of the NiCo-LDH through an electrochemical reaction and in-situ sulfuration, so that the interlayer spacing is increased, the transportation of OH- is facilitated, the conductivity of the CdS nanodots is improved, the electron migration is facilitated, and the electrochemical reaction active sites are increased. Meanwhile, the in-situ synthesis method not only avoids the adverse influence of secondary growth, but also reduces the volume expansion of the NiCo-LDH in the redox reaction process.

This invention belongs to the field of photocatalysis technology, and particularly relates to a CdS / TiO2 / CdS semi-inverted quantum well nanosheet, its preparation method, and its applications. This invention uses the ultrathin edge layer of TiO2 nanosheets as the quantum well bottom, cleverly utilizing the redox properties of TiO2 crystal heterojunctions, and employs a simple photoreduction and ion exchange method to grow CdS quantum dots on the TiO2 {101} surface as a quantum well barrier, thus constructing a CdS / TiO2 / CdS semi-inverted quantum well nanosheet. TiO2 is a wide-bandgap semiconductor with a bandgap of 3.2 eV, absorbing only about 4% of the ultraviolet light in sunlight. CdS is an n-type semiconductor with a bandgap of 2.4 eV, capable of absorbing visible light. Combining TiO2 and CdS extends the photoresponse range to the visible light region, improving the utilization efficiency of sunlight; the photocatalytic performance for the reduction of water and carbon dioxide is significantly enhanced.