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A kind of preparation method of doped modified tio2/graphene composite material

A composite material, graphene technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of low sunlight utilization efficiency, limited practical use, expensive precious metals, etc. The effect of catalytic activity, simple operation and simple process

Active Publication Date: 2015-11-18
CHANGZHOU GOLDEN SPRING TEXTILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] TiO 2 It is one of the currently used semiconductor photocatalytic materials. In the actual use process, there are two outstanding problems: (1) It needs ultraviolet light to be activated, and the ultraviolet light radiated to the ground only accounts for about 5% of sunlight, so Inefficient use of sunlight
Due to the high price of precious metals, the practical use of this method is limited

Method used

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  • A kind of preparation method of doped modified tio2/graphene composite material
  • A kind of preparation method of doped modified tio2/graphene composite material
  • A kind of preparation method of doped modified tio2/graphene composite material

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Experimental program
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Effect test

Embodiment 1

[0027] (1) Add n-butyl titanate to absolute ethanol and keep stirring to obtain a uniform and transparent yellow solution, then add a small amount of concentrated nitric acid dropwise to adjust the pH value to 3, and continue stirring for 1 hour after the dropwise addition to obtain a uniform and transparent solution The yellow solution is A liquid,

[0028] Butyl titanate: the volume ratio of absolute ethanol is 1: 4;

[0029] (2) Prepare a mixed solution of cerium nitrate and europium nitrate, which is liquid B,

[0030] The solvent is water. In the solution, the total concentration of cerium ions and europium ions is 0.2mol / L, and the molar ratio of cerium ions and europium ions is 1:1;

[0031] (3) Mix liquid A and liquid B obtained in the above two steps, and add transition metal salt Cu(NO 3 ) 2 After stirring evenly, a uniform and transparent sol is obtained, aged until the sol loses fluidity to obtain a gel,

[0032] In this step, the molar ratio between titanium e...

Embodiment 2

[0053] (1) Add n-butyl titanate to absolute ethanol and keep stirring to obtain a uniform and transparent yellow solution, then add a small amount of concentrated nitric acid dropwise to adjust the pH value to 2, and continue stirring for 2 hours after the dropwise addition to obtain a uniform and transparent solution The yellow solution is A liquid,

[0054] Butyl titanate: the volume ratio of absolute ethanol is 1: 4;

[0055] (2) Prepare a mixed solution of cerium nitrate and europium nitrate, which is liquid B,

[0056] The solvent is ethanol. In the solution, the total concentration of rare earth element ions (cerium ions and europium ions) is 0.4mol / L, and the molar ratio of cerium ions and europium ions is 3:1;

[0057] (3) Mix liquid A and liquid B obtained in the above two steps, and add transition metal salt Mn(NO 3 ) 2 4H 2 O, after stirring evenly, obtain a uniform and transparent sol, age until the sol loses fluidity and obtain a gel,

[0058] In this step, t...

Embodiment 3

[0079] (1) Add n-butyl titanate to absolute ethanol and keep stirring to obtain a uniform and transparent yellow solution, then add a small amount of concentrated nitric acid dropwise to adjust the pH value to 3, and continue stirring for 1.5 hours after the dropwise addition to obtain a uniform and transparent solution The yellow solution is A liquid,

[0080] Butyl titanate: the volume ratio of absolute ethanol is 1: 4;

[0081] (2) Prepare a mixed solution of cerium nitrate and europium nitrate, which is liquid B,

[0082] The solvent is water. In the solution, the total concentration of rare earth element ions (cerium ions and europium ions) is 0.3mol / L, and the molar ratio of cerium ions and europium ions is 2:1;

[0083] (3) Mix liquid A and liquid B obtained in the above two steps, and add transition metal salt Co(NO 3 ) 2 ·6H 2 O, after stirring evenly, obtain a uniform and transparent sol, age until the sol loses fluidity and obtain a gel,

[0084] In this step, ...

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Abstract

The invention relates to a method for preparing a doped-modified TiO2 / graphene composite material, belongs to the technical field of photocatalytic oxidation printing and dyeing wastewater treatment, and particularly relates to methods for preparing TiO2 composite photocatalysts which are loaded onto graphene and are doped with rare earth elements and transition metal ions. According to the method, the rare earth elements and the transition metal ions are doped into TiO2 firstly by a sol-gel method, and then, doped and modified TiO2 is loaded into a graphene oxide material through hydrothermal reaction, thus the doped-modified TiO2 / reduced graphene composite material is obtained. The composite photocatalyst prepared by the method can play a role in catalytically degrading organic pollutants in the presence of ultraviolet light and can play a role in catalysis under the conditions of visible light and even infrared light, and the utilization ratio of sunlight is increased greatly.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic oxidation printing and dyeing wastewater treatment, in particular to TiO loaded on graphene and doped with rare earth elements and transition metal ions 2 Preparation method of composite photocatalyst. Background technique [0002] Water is an important natural resource essential to human life and production. With the rapid development of dye and textile industries, the variety and quantity of dyes are increasing day by day, and the damage to natural ecology and environmental pollution caused by printing and dyeing wastewater are becoming more and more serious. Statistics show that the printing and dyeing industry discharges 2.3 billion tons of industrial wastewater every year, accounting for 10.6% of the total discharge of industrial wastewater in the country, ranking third in the total discharge of all industrial sectors in the country. Printing and dyeing wastewater has the characterist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18
Inventor 徐成耀李小春纪俊玲汪媛蒋海华
Owner CHANGZHOU GOLDEN SPRING TEXTILE