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A hierarchical self-assembled sno 2 The preparation method of -sno composite nanomaterial

A composite nanomaterial and self-assembly technology is applied in the field of preparation of graded self-assembled nanomaterials to achieve the effect of simple preparation process

Active Publication Date: 2017-01-04
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no one-step synthesis of SnO 2 / SnO Composite Material Report

Method used

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  • A hierarchical self-assembled sno <sub>2</sub> The preparation method of -sno composite nanomaterial
  • A hierarchical self-assembled sno <sub>2</sub> The preparation method of -sno composite nanomaterial
  • A hierarchical self-assembled sno <sub>2</sub> The preparation method of -sno composite nanomaterial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) take by weighing the stannous oxalate of 0.1g, and the hexamethylenetetramine of 0.15g is placed in the beaker;

[0018] (2) Add 100ml of water to the above raw materials and stir vigorously for 2 hours;

[0019] (3) Put the solution into a polytetrafluoroethylene reactor with a filling rate of 80%, react in an oven at 95°C for 3 hours, wait until the temperature drops to room temperature, and collect the precipitate.

Embodiment 2

[0021] (1) take by weighing the stannous oxalate of 0.5g, and the hexamethylenetetramine of 0.25g is placed in the beaker;

[0022] (2) Add 100ml of water to the above raw materials and stir vigorously for 2 hours;

[0023] (3) Put the solution into a polytetrafluoroethylene reactor with a filling rate of 50%, react in an oven at 90°C for 5 hours, wait until the temperature drops to room temperature, and collect the precipitate.

Embodiment 3

[0025] (1) take by weighing the stannous oxalate of 0.3g, and the hexamethylenetetramine of 0.3g is placed in the beaker;

[0026] (2) Add 100ml of water to the above raw materials and stir vigorously for 2 hours;

[0027] (3) Put the solution into a polytetrafluoroethylene reactor with a filling rate of 80%, react in an oven at 80°C for 2 hours, and collect the precipitate when the temperature drops to room temperature.

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Abstract

The present invention discloses a method of making grading self-assembly SnO2-SnO composite nanometer materials. The method uses stannous oxalate as tin precursors, under hydrothermal conditions, hexamethylenetetramine provides OH-, and through the control of the conditions such as the concentration, ratio, and reaction temperature of tin precursors, the grading self-assembly SnO2-SnO composite nanometer materials are made. The method includes: 1) weighing 0.1 to 0.5 grams of stannous oxalate and 0.07 to 0.3 grams of hexamethylenetetramine and putting the stannous oxalate and hexamethylenetetramine in a beaker; 2) adding 100 milliliters of water to the above materials and stirring violently; 3) putting the solution in a polytetrafluoroethylene reactor, wherein the filling rate of the reactor is in a range from 30% to 80%, reacting for 2 to 5 hours at a temperature of 80 DEG C to 100 DEG C, and taking deposition when the temperature drops to an ambient temperature. The present invention has the advantages that the hydrothermal method is simple, the reaction temperature is low, and a grading self-assembly SnO2-SnO structure can be obtained with no need of a subsequent processing. The SnO2 / SnO made by the method may be useful for a gas sensor, a solar battery photo-anode, and photocatalysis.

Description

technical field [0001] The invention relates to the preparation technology of metal oxide nanometer materials, in particular to a preparation method of hierarchical self-assembled nanomaterials. Background technique [0002] Due to the adjustable pore structure, high specific surface area and strong ion exchange performance of tin oxide nanomaterials, it is beneficial for the reactants to react at the active site in the catalytic process, and the H 2 The detection of S, ethanol, acetone, formaldehyde and other gases has shown great application prospects, so tin oxide nanostructure materials are widely used as sensitive materials for gas sensors. However, the gas-sensing performance of a single tin oxide material is controlled by the morphology, crystal form, specific surface area, and energy band structure of the material. Although the research in this area has made great progress, there are still low sensitivity and poor selectivity. shortcoming. [0003] Compared to pure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B82B3/00B82Y30/00
Inventor 何丹农葛美英尹桂林卢静宣天美胡骏
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH