Bismuth titanate photocatalytic material with visible light response and preparation method thereof

A photocatalytic material, bismuth titanate technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of environmental protection, simple preparation process, and low cost

Inactive Publication Date: 2009-11-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, with Bi 20 TiO 32 Bismuth titanate photocatalytic materials are mainly impure phases, due to Bi 20 TiO 32 metastability

Method used

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  • Bismuth titanate photocatalytic material with visible light response and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of bismuth titanate photocatalytic material with visible light response:

[0019] 1) Preparation of raw materials: Weigh the analytically pure TiO 2 and Bi 2 o 3 As a raw material, according to TiO 2 with Bi 2 o 3 The molar ratio of the mixture is 1:20 for batching, put the prepared raw materials into the mixer and mix evenly, the mixer speed is 200 rpm, and the mixing time is 2 hours;

[0020] 2) Heating reaction: put the mixture obtained in step 1) into a platinum crucible, then put the platinum crucible into a muffle furnace preheated to 900°C in advance, and react for 2 minutes;

[0021] 3) Quenching and cooling: take out the reacted platinum crucible and quickly put it into cold water for quenching, and grind the obtained sample finely in an agate mortar.

Embodiment 2

[0023] Preparation of bismuth titanate photocatalytic material with visible light response:

[0024] 1) Preparation of raw materials: Weigh the analytically pure TiO 2 and Bi 2 o 3 As a raw material, according to TiO 2 with Bi 2 o 3 The molar ratio of the mixture is 1:20 for batching, put the prepared raw materials into the mixer and mix evenly, the mixer speed is 200 rpm, and the mixing time is 2 hours;

[0025] 2) Heating reaction: put the mixture obtained in step 1) into a platinum crucible, then put the platinum crucible into a muffle furnace preheated to 900°C in advance, and react for 3 minutes;

[0026] 3) Quenching and cooling: take out the reacted platinum crucible and quickly put it into cold water for quenching, and grind the obtained sample finely in an agate mortar.

Embodiment 3

[0028] Preparation of bismuth titanate photocatalytic material with visible light response:

[0029] 1) Preparation of raw materials: Weigh the analytically pure TiO 2 and Bi 2 o 3 As a raw material, according to TiO 2 with Bi 2 o 3 The molar ratio of the mixture is 1:20 for batching, put the prepared raw materials into the mixer and mix evenly, the mixer speed is 200 rpm, and the mixing time is 2 hours;

[0030] 2) Heating reaction: put the mixture obtained in step 1) into a platinum crucible, then put the platinum crucible into a muffle furnace preheated to 1000°C in advance, and react for 3 minutes;

[0031] 3) Quenching and cooling: take out the reacted platinum crucible and quickly put it into cold water for quenching, and grind the obtained sample finely in an agate mortar.

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Abstract

The invention discloses a bismuth titanate photocatalytic material with visible light response, which is a pure phase material with a chemical formula of Bi20TiO32 and prepared by the steps of preparation of raw materials, heating reaction, and quenching and cooling. The material has the advantages of good photocatalytic activity, low cost, capability of recycling catalyst, simple method, easy large-scale production, and the like.

Description

technical field [0001] The invention relates to a photocatalytic material, in particular to a bismuth titanate photocatalytic material with visible light response and a preparation method thereof, belonging to the technical field of semiconductor materials. Background technique [0002] With the development of human society, the requirements for the environment are getting higher and higher, and environmental pollution is a problem that people need to solve urgently. Fujishima and Honda at TiO since 1972 2 Since hydrogen and oxygen are cracked under light on the electrode, semiconductor photocatalytic materials have aroused widespread interest among scientists in energy development and environmental governance. Among these semiconductor catalytic materials, TiO 2 It has become the most widely used photocatalytic material due to its advantages of non-toxicity, low price and good stability. However, due to TiO 2 It has a wide band gap (the anatase phase band gap is 3.2eV, ...

Claims

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Application Information

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IPC IPC(8): B01J23/18B01J21/06B01J37/00
Inventor 黄柏标程合锋张晓阳秦晓燕
Owner SHANDONG UNIV
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