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Preparation method of flower-like tin oxide/silver heterojunction material

A technology of tin oxide and heterojunction, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc. Such as the limitation of photocatalytic performance and gas-sensing performance, etc., to achieve the effect of accurate process parameters, accurate control of process parameters, and shortened production cycle

Inactive Publication Date: 2012-11-07
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] This method belongs to a two-step synthesis method, the process is cumbersome, and it is not economical and practical in large-scale production; in the preparation of the solution, ammonia water is added dropwise to make the pH>7, which is difficult to accurately control in specific operations and has poor repeatability; at the same time, the obtained The crystallinity of nanoparticles is not good, which will limit some properties of tin dioxide such as photocatalytic performance and gas sensing performance

Method used

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  • Preparation method of flower-like tin oxide/silver heterojunction material
  • Preparation method of flower-like tin oxide/silver heterojunction material
  • Preparation method of flower-like tin oxide/silver heterojunction material

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Effect test

Embodiment 1

[0018] Embodiment 1, with 0.9026gSnCl 2 2H 2 O and 0.2941gNa 3 C 6 h 5 o 7 2H 2 O was added to 30ml of deionized water, stirred magnetically for 10min, and mixed evenly; added 0.06g flake NaOH, stirred magnetically for 10min, mixed evenly; at the same time, mixed 0.1019g AgNO 3 Add it into 10ml of deionized water, stir it magnetically for 10min to prepare a uniform solution, then add it to the aforementioned mixed solution, and continue magnetic stirring for 10min; transfer the mixed solution to a reaction tank made of polytetrafluoroethylene, tighten the container, and put Put it into a microwave reactor, heat it to 150°C, and keep it warm for 1.5h; after the reaction is completed and cooled to room temperature, pour out the solution in the reaction vessel, and repeatedly wash and filter with deionized water and absolute ethanol until the filtered deionized The pH of the water is 7, dry at 60°C; at 1°C min -1 The temperature was raised to 450°C at a certain rate, and k...

Embodiment 2

[0020] Embodiment 2, 0.9477gSnCl 2 2H 2 O and 3.088gNa 3 C 6 h 5 o 7 2H 2 O was added to 35ml of deionized water, stirred magnetically for 15min to make it evenly mixed; added 0.084g flake NaOH, stirred magnetically for 15min, and mixed evenly; at the same time, 0.1698g AgNO 3 Add it into 10ml of deionized water, stir it magnetically for 15 minutes to prepare a uniform solution, add it to the aforementioned mixed solution, and continue magnetically stirring it for 15 minutes; transfer the mixed solution to a reaction tank made of polytetrafluoroethylene, tighten the container, and put Put it into a microwave reactor, heat it to 180°C, and keep it warm for 1.3h; after the reaction is completed and cooled to room temperature, pour out the solution in the reaction vessel, wash and filter it repeatedly with deionized water and absolute ethanol until the filtered deionized The pH of the water is 7, dry at 60°C; at 2°C min -1 The temperature was raised to 500°C at a certain r...

Embodiment 3

[0022] Embodiment 3, 1.0831gSnCl 2 2H 2 O and 3.5292gNa 3 C 6 h 5 o 7 2H 2 O was added to 40ml of deionized water, stirred magnetically for 20min, and mixed evenly; added 0.096g flake NaOH, stirred magnetically for 20min, mixed evenly; at the same time, 0.3396gAgNO 3 Add it into 10ml of deionized water, stir magnetically for 20min to prepare a homogeneous solution, add it to the aforementioned mixed solution, and continue magnetically stirring for 20min; transfer the mixed solution to a reaction tank made of polytetrafluoroethylene, tighten the container, and pack Put it into a microwave reactor, heat it to 200°C, and keep it warm for 1h; after the reaction is completed and cooled to room temperature, pour out the solution in the reaction vessel, and repeatedly wash and filter with deionized water and absolute ethanol until the filtered deionized water The pH value is 7, dried at 60°C; at 2°C min -1 The temperature was raised to 550°C at a certain rate, and kept for 1.5...

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Abstract

The invention discloses a preparation method of a flower-like tin oxide / silver heterojunction material. The method is used for solving the technical problem that the preparation period of preparation of the metal silver doped with stannic oxide is long. The technical scheme includes that a mixed solution of SnC12.2H20 and Na3C6H5O7.2H2O is prepared firstly, flaky NaOH is added, the mixture is mixed uniformly, the prepared AgNO3 solution is added to the mixed solution, the mixed solution is transferred to a reaction tank and added into a microwave reactor for heating, the temperature is lowered to a room temperature after the reaction, the solution in a reaction container is poured out, performing repeat washing with deionized water and absolute ethyl alcohol and drying after filtering, the temperature is raised to 450-600 DEG C with the speed of 1-3 DEG C min-1, 1-2.5 h heat preservation is achieved, and the flower-like tin oxide / silver heterojunction material is obtained. Microwave water heating is performed, and a heat processing method is supplemented, so that flower-like tin oxide / silver heterojunction which is in good crystallinity is obtained, the preparation period is shortened, and the technological parameter can be controlled accurately.

Description

technical field [0001] The invention relates to a preparation method of a tin oxide / silver heterojunction material, in particular to a preparation method of a flower-shaped tin oxide / silver heterojunction material. Background technique [0002] Literature "Zeng Wen, Lin Zhidong, Gao Junjie, Metal ion doped nano SnO 2 Gas-sensing properties and doping mechanism of materials, Nanotechnology and Precision Engineering, 6 (2008) 174-179" discloses a preparation method of metal ion doped tin dioxide, which involves the preparation of metal silver doped tin dioxide In this method, after the tin dioxide particles are obtained by a sol-gel method, metal particles are doped, and finally calcined, and the diameters of the obtained particles are all in the nanometer range, and the size distribution range is narrow. [0003] This method belongs to a two-step synthesis method, the process is cumbersome, and it is not economical and practical in large-scale production; in the preparation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/66B01J35/02
Inventor 樊慧庆王欣
Owner NORTHWESTERN POLYTECHNICAL UNIV
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