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Preparation method of poly(3,4-ethylenedioxythiophene)/self-doped defect-rich tin oxide nano composite photocatalytic material

A technology of ethylenedioxythiophene and photocatalytic materials, which is applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of obvious material agglomeration effect and reaction raw materials Insufficient environmental and friendly problems, to achieve the effect of simple process control, high efficiency and stable photocatalytic performance, and good plasticity

Inactive Publication Date: 2019-01-01
PINGDINGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Monovalent SnO 2 The large band gap results in photocatalytic reactions that can only be carried out by absorbing ultraviolet light, but the energy of ultraviolet light accounts for less than 5% of the total energy of sunlight
These preparation methods have their unique advantages, but the disadvantages are that the reaction raw materials are not environmentally friendly, and the agglomeration effect of the prepared materials is obvious, etc.

Method used

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  • Preparation method of poly(3,4-ethylenedioxythiophene)/self-doped defect-rich tin oxide nano composite photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Get 1mmol analytically pure stannous pyrophosphate (Sn 2 P 2 o 7 ) and 1.5mmol of acetic acid (CH 3 COOH), fully dissolved in 5mL of absolute ethanol, and then added successively 0.5mmol of alkyl dimethyl hydroxypropyl phospholipid betaine, 2mmol of tea polyphenols and 13mL of deionized water. In the ice-salt bath of crushed ice, use a constant temperature magnetic stirring device to continuously magnetically stir it at -10°C until it is completely dissolved to obtain solution A;

[0029] 2) Transfer solution A to a polytetrafluoroethylene-lined hydrothermal kettle at a filling ratio of 70%, then put the reaction kettle into a constant temperature oven at 120°C for 24h, after the hydrothermal reaction is completed, cool to room temperature to obtain Mixture B of self-doping defect-rich tin oxide heterojunction;

[0030] 3) Under the condition of continuous magnetic stirring in an ice bath of sodium chloride and crushed ice at -10°C, control 3,4-ethylenedioxythiop...

Embodiment 2

[0033] 1) Get 1mmol analytically pure stannous pyrophosphate (Sn 2 P 2 o 7 ) and 2.8mmol of acetic acid (CH 3 COOH), fully dissolved in 9mL of absolute ethanol, and then sequentially added 5mmol of alkyl dimethyl hydroxypropyl phospholipid betaine, 7mmol of tea polyphenols and 20mL of deionized water. In the ice-salt bath, use a constant temperature magnetic stirring device to continuously magnetically stir it at -5°C until it is completely dissolved to obtain solution A;

[0034] 2) Transfer the solution A to a polytetrafluoroethylene-lined hydrothermal kettle with a filling ratio of 66%, then put the reaction kettle into a constant temperature oven and keep it warm at 170°C for 12h. After the hydrothermal reaction is completed, cool to room temperature to obtain Mixture B of self-doping defect-rich tin oxide heterojunction;

[0035] 3) Under the condition of continuous magnetic stirring in an ice bath of sodium chloride and crushed ice at -5°C, control 3,4-ethylenedioxyt...

Embodiment 3

[0039] 1) Get 1mmol analytically pure stannous pyrophosphate (Sn 2 P 2 o 7 ) and 3.6mmol of acetic acid (CH 3 COOH), fully dissolved in 16mL of absolute ethanol, and then sequentially added 8mmol of alkyl dimethyl hydroxypropyl phospholipid betaine, 15mmol of tea polyphenols and 23mL of deionized water. In the ice-salt bath, use a constant temperature magnetic stirring device to continuously magnetically stir it at 10°C until it is completely dissolved to obtain solution A;

[0040] 2) Transfer the solution A to a polytetrafluoroethylene-lined hydrothermal kettle at a filling ratio of 35%, and then put the reaction kettle into a constant temperature oven at 200°C for 1 hour. After the hydrothermal reaction is completed, cool to room temperature to obtain Mixture B of self-doping defect-rich tin oxide heterojunction;

[0041] 3) Under the condition of continuous magnetic stirring in an ice bath of sodium chloride and crushed ice at 10°C, control 3,4-ethylenedioxythiophene (...

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Abstract

The invention relates to a preparation method of a poly(3,4-ethylenedioxythiophene) / self-doped defect-rich tin oxide nano composite photocatalytic material. A self-doped defect-rich tin oxide heterojunction material is loaded and dispersed on PETOT in a chemical bond complexing form to obtain the nano composite material; and the self-doped defect-rich tin oxide is selected from defect-rich tin oxide SnO2-x consisting of Sn-doped nonstoichiometric or mixed valent tin oxides. The electron-hole separation can be facilitated by utilizing the visible light responsive oxidation and reduction capacity of the self-doped defect-rich tin oxide heterojunction material, conductivity and hole transport capacity of PETOT as well as the chemical bonding heterojunction structure among different components, so that the excellent photocatalytic performance can be achieved. Meanwhile, the easy-to-mold characteristic of polypyrrole can effectively avoid the recycling difficulty of the powder material, sothat the poly(3,4-ethylenedioxythiophene) / self-doped defect-rich tin oxide heterojunction nano composite material is a novel environment-friendly photocatalytic material convenient to recycle.

Description

technical field [0001] The invention relates to a preparation method of a nano-composite photocatalytic material, in particular to a preparation method of a poly-3,4-ethylenedioxythiophene / self-doping defect-rich tin oxide nano-composite photocatalytic material. Background technique [0002] In recent years, the problem of environmental pollution has become increasingly serious, and the removal of toxic and harmful substances in gases and water has become increasingly important. At the same time, in order to avoid the "secondary pollution" caused by powder catalysts, it is of great significance to develop new environmentally friendly photocatalytic materials with recyclability, high performance and good stability. In order to overcome the shortcomings of single metal oxides and single organic semiconductor materials in light absorption, conductivity, and weak separation of photogenerated carriers, inorganic-organic composite photocatalytic materials have attracted extensive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J35/02C02F1/30C02F1/72C02F101/30C02F101/34C02F101/36C02F101/38B01J35/00
CPCC02F1/30C02F1/725B01J31/26C02F2305/10C02F2101/34C02F2101/36C02F2101/38C02F2101/308B01J35/39B01J35/40
Inventor 杨柳青白青曹可生田正山韩永军李青彬赵干卿
Owner PINGDINGSHAN UNIVERSITY
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