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In2O3/ZnFe2O4 nanometer heterojunction composite photocatalytic material and preparation method thereof

A composite photocatalysis, znfe2o4 technology, applied in the field of environmental pollution control, to achieve good application value and prospects, broaden the spectral response range, improve the effect of separation efficiency

Active Publication Date: 2016-05-25
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Currently, using ZnFe 2 o 4 Modify In 2 o 3 There is no report, especially the use of ZnFe 2 o 4 Nanoparticle-modified monodisperse In 2 o 3 Nanospheres form heterojunction composite photocatalytic materials and are used to degrade gas-phase toluene, which has not been reported at home and abroad.

Method used

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  • In2O3/ZnFe2O4 nanometer heterojunction composite photocatalytic material and preparation method thereof
  • In2O3/ZnFe2O4 nanometer heterojunction composite photocatalytic material and preparation method thereof
  • In2O3/ZnFe2O4 nanometer heterojunction composite photocatalytic material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Preparation of monodisperse In by hydrothermal method 2 o 3 nanosphere

[0033] 0.2mmolInCl 3 ·xH 2 O and 0.4mmol sodium citrate were dissolved in 10mL deionized water, and stirred until a transparent solution A was obtained; 1mmol urea was added to 10mL deionized water, stirred until dissolved to obtain solution B; solution B was slowly added dropwise to solution A, Continue to stir for 20–60 minutes, then transfer to a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 150°C for 22 hours; after cooling to room temperature, wash and purify with ethanol and deionized water several times to remove unreacted reactants, and centrifuge Separated and dried to give a white precipitate (In(OH) 3 ), the In(OH) 3 The white powder was calcined at 500°C for 2h to obtain monodisperse In 2 o 3 nanospheres.

Embodiment 2

[0035] According to the preparation method in Example 1, the hydrothermal reaction temperature was 120°C, the reaction was 18h, and other parameters remained unchanged, and monodisperse In 2 o 3 nanospheres.

Embodiment 3

[0037] According to the preparation method in Example 1, the amount of sodium citrate was increased to 0.7 mmol, and the amount of other raw materials and experimental procedures remained unchanged to obtain monodisperse In 2 o 3 nanospheres.

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Abstract

The invention discloses an In2O3 / ZnFe2O4 nanometer heterojunction composite photocatalytic material and a preparation method thereof and belongs to the technical fields of photocatalytic materials and environmental pollution improvement. The preparation method comprises the steps of firstly, preparing monodispersed In2O3 nanospheres through a hydro-thermal method; then adding ferric acetylacetonate, zinc nitrate and terephthalic acid to a mixed solution of absolute ethyl alcohol and N, N-dimethyl formamide, conducting sufficient stirring, then adding the In2O3 nanospheres to the mixture, and finally conducting a solvothermal reaction, centrifugation, drying and calcining, so that the nanometer heterojunction composite photocatalytic material is obtained finally. By means of obtained In2O3 / ZnFe2O4 nanometer heterojunction, the spectrum response range of In2O3 is enlarged, furthermore, separation efficiency of photogenerated charges is improved, and good application value and prospect are achieved in the field of photocatalytic degradation of organic pollutants. Raw materials used in the preparation method are low in price and easy to obtain, the reaction condition is easy to control, operation is simple, the equipment requirement is low, and environmental protection is achieved.

Description

technical field [0001] The invention belongs to the field of environmental pollution control and relates to a ferromagnetic semiconductor modified In 2 o 3 The preparation method of nanosphere, specifically relates to a kind of In 2 o 3 / ZnFe 2 o 4 Preparation and application of nano-heterojunction composite photocatalytic materials. Background technique [0002] Volatile organic compounds (VOCs for short) is the general term for volatile organic compounds. At present, more than 300 kinds of VOCs pollutants have been detected in the environment. VOCs mainly include a series of organic compounds such as aliphatic hydrocarbons, aromatic hydrocarbons, oxygen hydrocarbons, halogenated hydrocarbons, nitrogen hydrocarbons, sulfur hydrocarbons and low-boiling polycyclic aromatic hydrocarbons. The main sources of VOCs pollutants in outdoor air are the combustion of fuels such as coal, oil and natural gas, the production and processing of chemical raw materials such as coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/825B01J35/02B01J35/08
CPCB01J23/002B01J23/825B01J2523/00B01J35/50B01J35/23B01J35/51B01J35/39B01J2523/842B01J2523/33B01J2523/27
Inventor 李新勇张菲肇启东
Owner DALIAN UNIV OF TECH
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