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CN-118206156-B - Ternary metal oxide of bismuth ion doped antimony tungstate micro flowers and preparation method and application thereof

CN118206156BCN 118206156 BCN118206156 BCN 118206156BCN-118206156-B

Abstract

The invention discloses a bismuth ion doped antimony tungstate micro flower ternary metal oxide, a preparation method and application thereof, wherein the ternary metal oxide is a layered microsphere structure formed by nano sheets and nano wires, the thickness of the nano sheets is between 30 and 40 nm, the diameter of a micro flower Sb 2 WO 6 sphere is 3 to 5 mu m, the nano sheets and the nano wires are mutually loaded and assembled to form the bismuth ion doped antimony tungstate micro flower Sb 2 WO 6 ternary metal oxide, and the preparation method is simple and safe, low in cost and high in practicability, fills the blank of detecting carbon dioxide gas sensitivity by utilizing tungstate, and can be applied to carbon dioxide detection.

Inventors

  • ZHANG CHAO
  • ZHENG ZICHEN
  • LIU KEWEI
  • ZHOU YIWEN
  • ZHANG ZICONG

Assignees

  • 扬州大学

Dates

Publication Date
20260512
Application Date
20240402

Claims (5)

  1. 1. The application of the ternary metal oxide of bismuth ion doped antimony tungstate micro flowers in preparing a sensor for detecting carbon dioxide is characterized in that the ternary metal oxide of bismuth ion doped antimony tungstate micro flowers is of a layered microsphere structure consisting of nano sheets and nano wires, the thickness of the nano sheets is between 30 and 40 nm, and the diameter of a sphere of each micro flower Sb 2 WO 6 is 3-5 mu m; The nano-sheets and the nano-wires are mutually loaded and assembled to form bismuth ion doped micro flower Sb 2 WO 6 ternary metal oxide; the method for preparing the ternary metal oxide of the bismuth ion doped antimony tungstate micro flower comprises the following steps of, Placing antimony salt and bismuth salt into a beaker, adding quantitative absolute ethyl alcohol into the beaker, and vigorously stirring at room temperature for 20min to obtain an ethanol solution of the antimony salt and the bismuth salt; Placing tungstate in another beaker, adding quantitative deionized water into the other beaker, and vigorously stirring at room temperature for 20 min to obtain an aqueous solution of the tungstate; mixing the two prepared solutions in a large beaker to obtain a mixed solution, slowly dripping a proper amount of alkali solution into the mixed solution by using a dropper, and continuously stirring for 30min to fully react; Transferring the obtained mixed solution into a stainless steel high-pressure reaction kettle with a polytetrafluoroethylene lining, sealing, reacting at 180 ℃ for 24h, and naturally cooling to room temperature after the reaction is finished; taking out the product from the reaction kettle, alternately washing the obtained product with deionized water and absolute ethyl alcohol for a plurality of times, and drying after ensuring no obvious impurities to obtain the bismuth ion doped micron flower Sb 2 WO 6 ternary metal oxide; The antimony salt is SbCl 3 , the molecular weight is 228.12, the adding amount of the antimony salt is 3.64992 g, the bismuth salt is BiCl 3 , the molecular weight is 315.34, the adding amount of the bismuth salt is 0.64 mmol, the adding amount of absolute ethyl alcohol is 32 mL, the rotating speed of stirring the antimony salt, the bismuth salt and the absolute ethyl alcohol is 800 r/min, the tungstate is Na 2 WO 4 ·2H 2 O, the molecular weight is 329.86, the adding amount of the tungstate is 2.63888 g, the adding amount of deionized water is 32 mL, and the rotating speed of stirring the tungstate and the deionized water is 800 r/min.
  2. 2. The method according to claim 1, wherein the bismuth ion doped ternary metal oxide of the flowers Sb 2 WO 6 has a high specific surface area and an average pore size of 180nm.
  3. 3. The method according to claim 1, wherein the alkaline solution is a NaOH solution, the molecular weight of NaOH used is 40, and the rotational speed of the stirring mixed solution and the alkaline solution is 800 r/min.
  4. 4. The method according to claim 1, wherein the obtained product is washed with deionized water and absolute ethanol alternately for 6 times, and a low-speed table centrifuge is used for centrifugation in washing at 2500 r/min.
  5. 5. The method according to claim 1, wherein the method comprises the steps of adding the ternary metal oxide of bismuth ion doped antimony tungstate micro flowers into deionized water, grinding to form a paste, uniformly coating the paste on the outer surface of a gas sensor substrate, completely covering a platinum electrode, and drying 24 h at a proper temperature to form a gas-sensitive coating, thereby obtaining the gas sensor.

Description

Ternary metal oxide of bismuth ion doped antimony tungstate micro flowers and preparation method and application thereof Technical Field The invention belongs to the field of material processing, and particularly relates to a ternary metal oxide of bismuth ion doped antimony tungstate micro flowers and a preparation method thereof. Background Metal Oxide Semiconductors (MOS) are attracting attention due to their excellent gas detection performance. Micro-nano structured materials have better gas sensing and adsorption properties than bulk materials, the properties of which depend primarily on size, shape and structure. Due to its small size, low cost and low power consumption, MOS has been widely studied and applied to gas sensors. Antimony tungstate (Sb 2WO6) is an important ternary n-type semiconductor oxide, is also an important functional material, and has good optical and electrical properties, high hardness and high melting point. Sb 2WO6 has wide application in the optical field, and can be used for preparing materials with high refractive index, such as transparent ceramics and optical glass. In addition, sb 2WO6 can also be used in the fields of preparing electronic devices, battery materials, catalysts and the like. Due to the excellent performance, the Sb 2WO6 has important application prospect in the fields of material science and engineering, and can be applied to the preparation of gas sensors. In recent years, the preparation method of the Sb 2WO6 -based material is mainly focused on solvothermal method, microwave hydrothermal method and the like, and the Sb2WO6 micro-nano structural material with different morphologies can be prepared and is used for degrading part of pollutants and improving the photocatalytic performance. In recent years, a Sb 2WO6 micro-nano material is adopted as a gas-sensitive material to detect gas, and a method of modifying the Sb 2WO6 micro-nano material by utilizing ion doping is freshly reported to improve the gas-sensitive performance of CO 2 gas. Therefore, the preparation method of the Sb 2WO6 material and the improvement of the detection performance of carbon dioxide gas have yet to be researched and developed. Disclosure of Invention This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application. The present invention has been made in view of the above-mentioned and/or problems occurring in the prior art when Sb 2WO6 -based micro-nano materials are used for carbon dioxide gas detection. Therefore, the invention aims to overcome the defects in the prior art and provide the ternary metal oxide of bismuth ion doped antimony tungstate micro flowers. In order to solve the technical problems, the invention provides a ternary metal oxide of bismuth ion doped stibium tungstate micro flower, which comprises, The layered microsphere structure consists of a nano sheet and a nano wire, wherein the thickness of the nano sheet is between 30 and 40 nm, and the diameter of a micron flower Sb 2WO6 sphere is 3 to 5 mu m; the nano-sheets and the nano-wires are mutually loaded and assembled to form the bismuth ion doped micro flower Sb 2WO6 ternary metal oxide. As a preferable scheme of the ternary metal oxide of the antimony tungstate micro flowers, the ternary metal oxide of the bismuth ion doped micro flowers Sb 2WO6 has high specific surface area and the average pore size of the ternary metal oxide is 180 nm. The invention also aims to overcome the defects in the prior art and provide a preparation method of ternary metal oxide of bismuth ion doped antimony tungstate micro flowers, Placing antimony salt and bismuth salt into a beaker, adding quantitative absolute ethyl alcohol into the beaker, and vigorously stirring at room temperature for 20min to obtain an ethanol solution of the antimony salt and the bismuth salt; Placing tungstate in another beaker, adding quantitative deionized water into the other beaker, and vigorously stirring at room temperature for 20 min to obtain an aqueous solution of the tungstate; mixing the two prepared solutions in a large beaker to obtain a mixed solution, slowly dripping a proper amount of alkali solution into the mixed solution by using a dropper, and continuously stirring for 30min to fully react; Transferring the obtained mixed solution into a stainless steel high-pressure reaction kettle with a polytetrafluoroethylene lining, sealing, reacting at 180 o ℃ for 24: 24 h, and naturally cooling to room temperature after the reaction is finished; And taking out the product from the reaction kettle, washing the obtained product with deionized water and absolute ethyl alcohol for a plurality of times alternately, ensuring no obvious impurities, and drying to obtain t