7 results about "Ion selective electrode" patented technology

This invention discloses an anion-selective electrode, its preparation method, and its application. The anion-selective electrode consists of two electrodes with different loading amounts, each on a conductive substrate loaded with a metal / a sparingly soluble metal salt. The preparation method involves first depositing a large amount of metal on a conductive substrate, then using it as the anode and electrolyzing it for a long time in an anion solution containing anions capable of forming the sparingly soluble metal salt, resulting in an electrode composed of a large amount of metal and its sparingly soluble salt. Then, a small amount of metal is deposited on another conductive substrate, which is then used as the anode and electrolyzed for a short time in the same anion solution, resulting in an electrode composed of a small amount of metal and its sparingly soluble salt. The two electrodes form an electrode pair. The selective electrode of this invention consists of a pair of electrodes, exhibiting uniform size, high specific surface area, and abundant active sites. Compared with traditional electrodes, it is smaller in size. The preparation method is simple and reliable. When applied to fields such as anion detection, it demonstrates high selectivity and sensitivity, making it suitable for widespread application.

The present application relates to the field of plant factory water culture, and specifically discloses a kind of plant factory three-dimensional cultivation automatic liquid supply equipment and hierarchical compensation control method, including independent liquid supply unit, comprising: a pneumatic sensing assembly, with a closed flexible sensing capsule inside encapsulating low-boiling working medium, the sensing capsule is configured to respond to the microenvironment humidity change caused by crop transpiration in the cultivation layer. The plant factory three-dimensional cultivation automatic liquid supply equipment and hierarchical compensation control method, through the mechanical combination of transpiration-condensation sensing capsule and nonlinear cam differential proportional valve, realizes the passive, real-time, independent compensation of the different water and fertilizer requirements of each layer of three-dimensional cultivation, and gets rid of the dependence on expensive and frequently maintained online ion selective electrode.

The present application relates to the technical field of lithium ion extraction, and particularly relates to an electrochemical lithium extraction device and method based on interfacial evaporation. The device comprises an upper end plate provided with a light transmission hole, a middle chamber and a lower end plate; the middle chamber takes a composite lithium extraction electrode as a top cover, and the bottom of the middle chamber is provided with an auxiliary electrode; the composite lithium extraction electrode comprises, from top to bottom, a photothermal material layer, a current collector layer and an electrode material layer; the electrode material layer is loaded with lithium ion selective electrode active material; the sidewall of the middle chamber is provided with a water inlet hole and a drainage hole, the water inlet hole and the drainage hole are connected with a water pump through a pipeline to form a solution circulation loop; the auxiliary electrode is connected with a power supply and the current collector layer through a wire in sequence to form a power supply circuit. Through the organic integration of photothermal interfacial evaporation and electrochemical ion pump, the present application effectively solves the problems of concentration polarization and reaction kinetics limitation in the process of low lithium source lithium extraction, and significantly improves the extraction efficiency of lithium ions and the system performance.

This invention discloses a Se-doped CuCo2S4 composite material, an all-solid-state sodium ion selective electrode, its preparation method, and its application. In the composite material, Se atoms replace some S sites in the CuCo2S4 lattice, forming a lattice-doped structure; the Se doping amount, calculated as the amount of SeO2 added, is 0.1–0.3 mmol. The preparation method includes dissolving a copper source and a cobalt source in anhydrous methanol, adding a sulfur source and SeO2, and then performing a solvothermal reaction. This invention also discloses an all-solid-state sodium ion selective electrode, comprising an electrode substrate, a transduction layer, and a sodium ion selective film disposed on the surface of the transduction layer, wherein the transduction layer is made of the aforementioned Se-doped CuCo2S4 composite material. This electrode exhibits a near-Nernst response to sodium ions, with a detection limit of 10. ‑5.2 M. This invention significantly improves the capacitance and hydrophobicity of materials by inducing lattice expansion and sulfur vacancy formation through Se doping, achieving stable detection of sodium ions. Furthermore, the preparation process is simple and has promising prospects for industrial application.

The present application belongs to the field of mine filling engineering and safety monitoring, and relates to an intelligent monitoring device and evaluation system for long-term performance of filling body in underground environment. The intelligent monitoring device comprises a packaging sheath, a sleeve, a sensor array, a signal conditioning circuit, a computing unit and a power supply module; the packaging sheath and the sleeve are made of titanium alloy material, the inner wall of the sleeve is coated with a silicon dioxide nano coating, which significantly improves the long-term service ability of the device; the sensor array comprises a solid-state ion selective electrode, an acoustic emission sensor array and an integrated wet temperature sensor; the device uses the signals obtained by the sensor array, and through a coupling algorithm of chemical corrosion rate and cumulative acoustic emission energy, the residual bearing capacity decay coefficient of the filling body is calculated in real time, and the result is transmitted to the monitoring server wirelessly for safety performance evaluation of the filling body; the evaluation result is more comprehensive, intuitive and timely, and provides a high-reliability and high-precision technical means for stability evaluation of filling body in green mining.

The present application belongs to the technical field of water treatment, and particularly relates to a biochar wetland desulfurization and denitrification system based on a rotating reactor. The system comprises a rotating sulfate-reducing unit and a biochar-based artificial wetland unit connected in series. The rotating unit is internally provided with rotatable filler devices, Ca-bacteria charcoal composite layers and granular calcium sulfide solid layers. The concentration of SO4 2‑ / is monitored in real time by an ion selective electrode, and the filler lifting and wastewater backflow are linked. 2‑ The wetland unit is provided with a biochar-sand mixed substrate layer for planting reeds. The wastewater is subjected to adsorption and reduction of SO4 2‑ by the rotating unit to generate CaSO4 precipitates and release S 2‑ into the wetland to drive sulfur autotrophic denitrification. The system can achieve a SO4 2‑ removal rate of more than 84%, a NO3 ‑ removal rate of more than 66%, and a COD effluent of less than 20 mg / L, thereby solving the problems of high water quality mineralization and inhibited denitrification.

The application discloses a method for tracking electrode zero-point drift based on Kalman filtering combined with Arrhenius equation, and belongs to the field of water quality monitoring sensor signal processing. The application establishes a temperature-related electrode aging drift rate model through the Arrhenius equation, embeds the drift law into the state transition process of Kalman filtering, realizes prior prediction of the zero point and posterior correction after observation, can filter out measurement noise and predict long-term aging drift trend at the same time, significantly reduces the frequency of manual calibration, improves the long-term stability and precision of online measurement of an ion selective electrode, and is suitable for unattended long-term operation of water quality monitoring equipment such as ammonia nitrogen sensors.