7 results about "Cadmium Metal" patented technology

The invention discloses a soil environment Cd metal monitoring method based on specific response of root exudates, which comprises the following steps: in a monitoring period, carrying out root exudates sample collection and soil sample collection on a to-be-monitored area, carrying out root environment perception and dynamic exudates capture based on the collected samples, and generating a root perception data set; a response mode between the soil environment Cd degree and root exudates is established, and an exudates response characteristic fingerprint spectrum is established; coupling the synchronously collected soil environment data to carry out feature importance analysis and regression modeling, quantifying interference rules of different environment factors on a secretion response mode, and generating an environment correction coefficient set; constructing an environmental cadmium analysis model by utilizing the secretion response characteristic fingerprint spectrum and the environmental correction coefficient set; and in the next monitoring period, acquiring real-time area monitoring data of the cadmium sampling points in the area to be monitored, importing the real-time area monitoring data into the environment cadmium analysis model to carry out area cadmium metal situation diagnosis, and carrying out early warning prompt.

The invention provides an aqueous cadmium ion-vanadium dioxide battery as well as a preparation method and application thereof, and relates to the field of ocean energy storage. The battery comprises a negative electrode, a positive electrode, a diaphragm and an aqueous electrolyte, the negative electrode is metal cadmium or cadmium-based alloy; the active material of the positive electrode is metastable monoclinic phase vanadium dioxide; the diaphragm is a glass fiber diaphragm; the aqueous electrolyte is an aqueous solution containing cadmium salt; the total concentration of the cadmium salt in the aqueous electrolyte is 1-4 mol / L. The aqueous vanadium dioxide-cadmium metal secondary battery disclosed by the invention has the advantages of safe aqueous electrolyte system, high rate capability, ultra-long cycle life and the like, and has remarkable advantages when being applied to ocean energy storage.

The application provides a water-based cadmium ion-vanadium dioxide battery and a preparation method and application thereof, and relates to the field of marine energy storage.The application comprises a negative electrode, a positive electrode, a diaphragm and a water-based electrolyte; the negative electrode is metal cadmium or a cadmium-based alloy; the active substance of the positive electrode is metastable monoclinic phase vanadium dioxide; the diaphragm is a glass fiber diaphragm; the water-based electrolyte is an aqueous solution containing cadmium salt; and the total concentration of the cadmium salt in the water-based electrolyte is 1-4 mol / L.The water-based vanadium dioxide-cadmium metal secondary battery has the advantages of a safe water-based electrolyte system, high rate performance and super-long cycle life, and has significant advantages in marine energy storage.

The application relates to a self-supporting NiCdMo ternary composite metal oxide catalyst and application thereof, and a preparation method of the catalyst is as follows: foam nickel is cleaned under ultrasonic conditions to obtain a foam nickel substrate; nickel metal salt, molybdenum metal salt and cadmium metal salt are dissolved in an ethylene glycol aqueous solution, the mixture is stirred uniformly at room temperature, and then is transferred to a polytetrafluoroethylene-lined high-pressure kettle, the foam nickel substrate is added, the high-pressure kettle is sealed, and a solvothermal reaction is carried out; after being naturally cooled to room temperature, the obtained precursor is washed and vacuum dried to obtain A; A is calcined in an inert atmosphere, and is naturally cooled to room temperature to obtain B; B is calcined in a 5 vol.% NH3 / N2 atmosphere, and is naturally cooled to room temperature to obtain the self-supporting NiCdMo ternary composite metal oxide catalyst. The self-supporting NiCdMo ternary composite metal oxide catalyst exhibits high catalytic activity and long-term stability in urea oxidation reaction and hydrogen evolution reaction.

The invention relates to a nitrogen-containing dicyclobutane derivative with a controllable configuration and a preparation method thereof. According to the invention, cadmium metal is taken as a coordination metal, and is subjected to coordination driving self-assembly with a diolefin-containing ligand under the assistance of carboxylic acid to form a stable coordination polymer, so that a [2 + 2] light ring addition reaction is realized under a solid-phase condition, and the controllable nitrogen-containing dicyclobutane derivative with a stable structure is efficiently and highly selectively synthesized. The method effectively avoids the common side reaction and isomerization problems in the traditional liquid phase reaction, has the advantages of mild reaction conditions, high yield, good stereoselectivity, easy product separation and the like, and provides a new way for synthesis of dicyclobutane compounds with potential biological activity.

The application discloses a three-dimensional cadmium metal organic framework material with a fluorescent detection function, and synthesis and application thereof, and has a chemical formula of Cd4(BTB)3(DMF)2(H2O)6·((CH3)2NH2). The synthesis method of the three-dimensional cadmium metal organic framework material is generated by a solvothermal reaction of 1,3,5 benzene-triphenylmethane acid BTB and anhydrous cadmium nitrate. The three-dimensional cadmium metal organic framework material with the fluorescent detection function is applied to detection of p-nitrophenol. The complex can specifically detect p-nitrophenol, has strong anti-interference ability, low detection limit and fast response speed, has strong acid and alkali resistance, and good fluorescent stability. In addition, the three-dimensional cadmium metal organic framework material has low raw material cost, simple and environment-friendly synthesis method, and high yield.

The invention provides a sensing material based on a cadmium metal organic framework as well as a preparation method and application of the sensing material, and a chemical structural unit of the sensing material comprises cadmium ions and 2, 3-quinoline diformate anions; the preparation method at least comprises the following steps: adding 2, 3-quinolinedicarboxylic acid and cadmium salt into a mixed solvent, carrying out solvothermal reaction at 130-150 DEG C for 36-60 hours, and after the reaction is finished, cooling and separating to obtain the Cd-MOF sensing material. The Cd-MOF sensing material disclosed by the invention is good in stability and has high selectivity and high sensitivity to Fe < 3 + > ions, and the good stability and wide pH adaptability of the sensing material guarantee the reliable detection capability in different actual water samples; the bottleneck problem that sensitivity, selectivity, environmental applicability and on-site convenience of a traditional sensing technology are difficult to consider at the same time is systematically solved.