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Method for preparing multi-stage SnO2 nanotubular gas sensitive material and application of method

A gas-sensitive material and nanotechnology, applied in the direction of tin oxide, etc., can solve the problems of human health and surrounding environment, harsh reaction conditions, cumbersome steps, etc., and achieve good application prospects, low water and heat temperature, and auxiliary performance effects

Active Publication Date: 2019-03-22
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the traditional methods for preparing nano gas-sensitive materials require cumbersome steps, expensive instruments and harsh reaction conditions, and use volatile and toxic reagents, which will affect human health and the surrounding environment.

Method used

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  • Method for preparing multi-stage SnO2 nanotubular gas sensitive material and application of method
  • Method for preparing multi-stage SnO2 nanotubular gas sensitive material and application of method
  • Method for preparing multi-stage SnO2 nanotubular gas sensitive material and application of method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A multilevel SnO 2 A method for preparing a nanotube-shaped gas-sensitive material, comprising the following steps:

[0035] (1) Add 0.45g of PVP (MW.58000) into 25ml of ethylene glycol, stir for 30min, and sonicate for 10min until the solution is clear to obtain a solution;

[0036] (2) Add 15 mg of molybdenum oxide nanorods into solution a, stir for 1 h until molybdenum oxide is evenly dispersed in solution a, and obtain solution b;

[0037] (3) Add 1.6ml tin protochloride solution (0.758g tin protochloride dissolved in 10ml ethylene glycol) and 1.6ml thioacetamide solution (0.3g thioacetamide dissolved in 10ml ethylene glycol) to b solution, stirred for 20 minutes, then transferred to a 50ml polytetrafluoroethylene-lined stainless steel reaction kettle, heated at a constant temperature of 160°C for 12 hours;

[0038] (4) collect after cooling, collect by centrifugation with dehydrated alcohol, repeat 5 times, then transfer the gained precipitation in the beaker wit...

Embodiment 2

[0041] (1) Add 0.5g of PVP (MW.58000) into 25ml of ethylene glycol, stir for 30min, and sonicate for 10min until the solution is clear;

[0042] (2) Add 20 mg of molybdenum oxide nanorods into the solution a, and stir for 1 h until the molybdenum oxide is evenly dispersed in the solution a;

[0043] (3) Add 1.6ml tin protochloride solution (0.758g tin protochloride dissolved in 10ml ethylene glycol) and 1.6ml thioacetamide solution (0.3g thioacetamide dissolved in 10ml ethylene glycol) to b solution, stirred for 20 minutes, then transferred to a 50ml polytetrafluoroethylene-lined stainless steel reaction kettle, and heated in constant temperature water for 12 hours;

[0044] (4) collect after cooling, collect by centrifugation with dehydrated alcohol, repeat 5 times, then transfer the gained precipitation in the beaker with 20ml dehydrated alcohol, add 3ml concentrated ammonia water, stir 90min, its purpose is to remove molybdenum oxide template, Then it was collected by cent...

Embodiment 3

[0047] A multilevel SnO 2 A method for preparing a nanotube-shaped gas-sensitive material, comprising the following steps:

[0048] (1) Add 0.45g of PVP (MW.58000) into 45ml of ethylene glycol, stir for 30min, and sonicate for 10min until the solution is clear to obtain a solution;

[0049] (2) Add 24 mg of molybdenum oxide nanorods into solution a, stir for 1 h until the molybdenum oxide is evenly dispersed in solution a, and obtain solution b;

[0050] (3) Add 2.18ml tin protochloride solution (0.5g tin protochloride dissolved in 10ml ethylene glycol) and 2.62ml thioacetamide solution (0.5g thioacetamide dissolved in 10ml ethylene glycol) to b solution, stirred for 20 minutes, then transferred to a 50ml polytetrafluoroethylene-lined stainless steel reaction kettle, heated at a constant temperature of 150°C for 14 hours;

[0051] (4) collect after cooling, collect by centrifugation with dehydrated alcohol, repeat 3 times, then transfer the gained precipitation in the beaker...

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Abstract

The invention discloses a method for preparing a multi-stage SnO2 nanotubular gas sensitive material. The method comprises the following steps: (1) stirring PVP (Polyvinyl Pyrrolidone) in ethylene glycol, and carrying out ultrasonic treatment so as to obtain a solution a; (2) uniformly dispersing molybdenum oxide nanorods into the solution a so as to obtain a solution b; (3) putting a stannous chloride solution and a thioacetamide solution into the solution b, stirring, transferring into a reaction kettle, and carrying out constant-temperature hydrothermal treatment for 10-14 hours; (4) cooling, carrying out centrifugal collection with absolute ethyl alcohol, transferring obtained precipitate into a flask by using the absolute ethyl alcohol, adding ammonia water, stirring for 1-2 hours, carrying out centrifugal collection, and drying the obtained precipitate so as to obtain SnS2; (5) calcining the obtained SnS2 in a tubular furnace, thereby obtaining the multi-stage SnO2 nanotubular gas sensitive material. The method is cheap and easy in raw material obtaining, simple in operation method, low in energy consumption, good in repeatability, high in yield and applicable to on-scale production, and in addition, the prepared multi-stage SnO2 nanotubular gas sensitive material can be used as materials of sensors, catalysts, catalyst carriers and the like, and has good application prospects.

Description

technical field [0001] The invention relates to the technical field of gas sensitive materials, in particular to a multi-level SnO 2 Preparation method and application of nanotube gas-sensing material. Background technique [0002] In recent years, the development of nanotechnology has greatly promoted the development and application of functional materials. The size, morphology and composition of nanomaterials will greatly affect their properties, thereby affecting their application prospects. So far, two-dimensional sheet, hollow tubular or three-dimensional multi-level semiconductor nanostructures, and multi-component modulation have aroused great interest of researchers and become a new hotspot in nanomaterials research. This type of material has the advantages of large specific surface area and open structure, so it has extremely important application value in the field of gas-sensing materials. [0003] Gas-sensing materials involve the interaction between the surfa...

Claims

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Application Information

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IPC IPC(8): C01G19/02
CPCC01G19/02C01P2002/72C01P2004/03C01P2004/04C01P2004/16
Inventor 韦映梅欧文超王丽伟王英辉余克服
Owner GUANGXI UNIV
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