Preparation method of polypyrrole/self-doped defect-rich tin oxide heterojunction nano composite photocatalytic material

A photocatalytic material and nanocomposite technology, which is applied in the field of preparation of nanocomposite photocatalytic materials, can solve the problems of obvious material agglomeration effect, insufficient environmental and friendly reaction raw materials, etc., and achieve simple process control, high efficiency and stable photocatalytic performance, and plasticity. Good results

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

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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 polypyrrole/self-doped defect-rich tin oxide heterojunction nano composite photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Take 1 mmol of analytically pure stannous pyrophosphate (Sn 2 P 2 O 7 ) and 1.5 mmol of acetic acid (CH 3 COOH) was fully dissolved in 5 mL of absolute ethanol, then 0.5 mmol of alkyldimethylhydroxypropyl phosphobetaine, 2 mmol of tea polyphenols and 13 mL of deionized water were added in turn to obtain solution A. Constant-temperature magnetic stirring was continuously used in an ice-salt bath of calcium chloride and crushed ice at -40°C;

[0028] 2) The solution A was transferred to a polytetrafluoroethylene-lined hydrothermal kettle at a filling ratio of 70%, and then the reaction kettle was placed in a thermostatic oven at 80° C. for 72 hours, and the hydrothermal reaction was completed. Self-doping defect-rich tin oxide heterojunction mixed solution B;

[0029] 3) Control pyrrole (C 4 H 5 N) and stannous pyrophosphate (Sn) used in step 1) 2 P 2 O 7 ) at a molar ratio of 0.01:1, pyrrole (C 4 H 5 N) fully dissolve in absolute ethanol in a closed contain...

Embodiment 2

[0032] 1) Take 1 mmol of analytically pure stannous pyrophosphate (Sn 2 P 2 O 7 ) and 2.5 mmol of acetic acid (CH 3 COOH) is fully dissolved in 10mL of absolute ethanol, then add 5mmol of alkyl dimethyl hydroxypropyl phospholipid betaine, 8mmol of tea polyphenols and 18mL of deionized water and mix to obtain solution A, the whole process is in - Constant-temperature magnetic stirring was continuously used in an ice-salt bath of calcium chloride and crushed ice at 30°C;

[0033] 2) The solution A was transferred to a polytetrafluoroethylene-lined hydrothermal kettle at a filling ratio of 66%, then the reaction kettle was placed in a constant temperature oven and kept at 130 ° C for 60 h, the hydrothermal reaction was completed, and cooled to room temperature to obtain a solution containing Self-doping defect-rich tin oxide heterojunction mixed solution B;

[0034] 3) Control pyrrole (C 4 H 5 N) and stannous pyrophosphate (Sn) used in step 1) 2 P 2 O 7 ) at a molar rati...

Embodiment 3

[0038] 1) Take 1 mmol of analytically pure stannous pyrophosphate (Sn 2 P 2 O 7 ) and 3.6 mmol of acetic acid (CH 3 COOH) was fully dissolved in 16mL of absolute ethanol, followed by adding 8mmol of alkyl dimethyl hydroxypropyl phospholipid betaine, 15mmol of tea polyphenols and 23mL of deionized water and mixed uniformly to obtain solution A, the whole process was in - Continuously use constant temperature magnetic stirring in an ice-salt bath of calcium chloride and crushed ice at 20°C;

[0039] 2) Transfer solution A to a polytetrafluoroethylene-lined hydrothermal kettle at a filling ratio of 35%, then put the reaction kettle into a constant temperature oven and keep it at 160°C for 48 hours. After the hydrothermal reaction is completed, it is cooled to room temperature to obtain a Self-doping defect-rich tin oxide heterojunction mixed solution B;

[0040] 3) Control pyrrole (C 4 H 5 N) and stannous pyrophosphate (Sn) used in step 1) 2 P 2 O 7 ) at a molar ratio of...

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Abstract

The invention relates to a preparation method of a polypyrrole/self-doped defect-rich tin oxide heterojunction nano composite photocatalytic material. The nano composite material is obtained by loading and dispersing a self-doped defect-rich tin oxide heterojunction material on Ppy in a chemical bond complexing form; 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 is facilitated by utilizing the visible light responsive oxidation and reduction capacity of theself-doped defect-rich tin oxide heterojunction material, the conductivity and photo conduction characteristic of polypyrrole as well as chemical bond heterojunction structure among different components, so that the excellent photocatalytic performance can be obtained. Meanwhile, the easy-to-mold characteristic of polypyrrole can effectively avoid the recycling difficulty of the powder material,so that the polypyrrole/self-doped defect-rich tin oxide nano composite material prepared by the method is a novel environment-friendly photocatalytic material convenient to recycle.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite photocatalytic material, in particular to a preparation method of a polypyrrole / self-doping defect-rich tin oxide heterojunction nanocomposite photocatalytic material. Background technique [0002] In recent years, organic pollutants and heavy metal ions discharged from industrial wastewater and industrial waste gas have seriously endangered the environment. The construction of new inorganic-organic nanomaterials for photocatalytic removal of organic pollutants in water and air has received extensive attention. SnO 2 Due to its excellent optoelectronic properties, gas-sensing properties, chemical stability and environmental friendliness, it has been widely used in the field of catalysts to degrade organic dyes such as orange-yellow G, Brill blue, alizarin red S, methylene blue, and rhodamine B. Monovalent SnO 2 The large forbidden band width leads to the fact that it can only absorb an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J35/02C02F1/30C02F1/72C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J31/26B01J35/004B01J35/023C02F1/30C02F1/725C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 杨柳青白青曹可生李青彬韩永军
Owner PINGDINGSHAN UNIVERSITY
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