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a kind of wo 3 /tiof 2 Preparation method of composite visible light catalyst

A catalyst and visible light technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as high energy consumption and complex process, and achieve low energy consumption, good degradation performance, and good application foreground effect

Inactive Publication Date: 2017-10-10
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrothermal method usually requires a high temperature and high pressure environment, the process is complicated, the energy consumption is high, and this defect also exists when it is combined with other substances

Method used

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  • a kind of wo <sub>3</sub> /tiof <sub>2</sub> Preparation method of composite visible light catalyst
  • a kind of wo <sub>3</sub> /tiof <sub>2</sub> Preparation method of composite visible light catalyst
  • a kind of wo <sub>3</sub> /tiof <sub>2</sub> Preparation method of composite visible light catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment prepares WO 3 / TiOF 2 The method of composite visible light catalyst is realized by the following steps:

[0022] (1) Measure absolute ethanol, add it to butyl titanate according to the ratio of butyl titanate to absolute ethanol volume ratio of 1.15:1, and mix well to obtain A solution;

[0023] (2) Take deionized ethanol and HF and add them into deionized water so that the volume ratio of deionized water to deionized ethanol and HF is 1:0.169:0.112 to obtain solution B;

[0024] (3) Under the condition of heating at a constant temperature of 60°C, add solution B to solution A drop by drop, so that the molar ratio of butyl titanate in mixed solution A to deionized water in mixed solution B is 1:100, and the dropping speed Controlled at 3 drops per second, stirred at a constant speed of 650r / min for 2 hours to obtain TiOF 2 gel;

[0025] (4) Place the aged TiOF at room temperature for 2 days in the dark. 2 Put it in an oven and dry it at 100°C, wash...

Embodiment 2

[0029] This embodiment prepares WO 3 / TiOF 2 The method of composite visible light catalyst is realized by the following steps:

[0030] (1) Measure absolute ethanol, add it to butyl titanate according to the ratio of butyl titanate to absolute ethanol volume ratio of 1:1, and mix well to obtain A solution;

[0031] (2) Take deionized ethanol and HF and add them into deionized water so that the volume ratio of deionized water to deionized ethanol and HF is 1:0.1:0.1 to obtain solution B;

[0032] (3) Under the condition of heating at a constant temperature of 50°C, add solution B to solution A dropwise, so that the molar ratio of butyl titanate in mixed solution A to deionized water in mixed solution B is 1:90, and the dropping speed is controlled At 2 drops per second, 500r / min constant temperature magnetic stirring for 3 hours, TiOF 2 Gel, aged at room temperature for 1 day;

[0033] (4) The aged TiOF 2 The gel was moved to a blast drying oven at 80°C and dried at a const...

Embodiment 3

[0037] This embodiment prepares WO 3 / TiOF 2 The method of composite visible light catalyst is realized by the following steps:

[0038] (1) Measure absolute ethanol, add it to butyl titanate according to the ratio of butyl titanate to absolute ethanol volume ratio of 1.2:1, and mix well to obtain A solution;

[0039] (2) Take deionized ethanol and HF and add them into deionized water so that the volume ratio of deionized water, dehydrated ethanol and HF is 1:0.2:0.2 to obtain solution B;

[0040] (3) Under the condition of constant temperature heating at 58°C, add solution A to solution B dropwise, so that the molar ratio of butyl titanate in mixed solution A to deionized water in mixed solution B is 1:105, and the dropping speed is controlled At 3 drops per second, 800r / min constant temperature magnetic stirring for 1 hour, TiOF 2 Gel, aged at room temperature for 3 days;

[0041] (4) The aged TiOF 2 The gel was moved to a blast drying oven at 90°C and dried at a consta...

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Abstract

The present invention relates to a WO 3 / TiOF 2 A method for preparing a composite visible light catalyst, which uses butyl titanate (TBT) as a precursor, adopts an improved sol-gel method, and prepares tubular TiOF with small grain size and large specific surface area at low temperature and normal pressure 2 , and then through the chemical precipitation method on TiOF 2 Surface deposition of nanoscale WO 3 , making full use of the WO 3 The characteristics of being excited in the visible light range, and the tube-like TiOF 2 The photocatalytic properties of each other synergize to greatly improve the WO 3 / TiOF 2 The photocatalytic effect, especially the degradation performance to rhodamine B (RhB) is better, and the preparation process of the present invention does not need high temperature and high pressure environment, reaction conditions are mild, energy consumption is low, operating cost is low, have very good application prospect .

Description

technical field [0001] The invention belongs to the technical field of photocatalyst synthesis research, in particular to a WO 3 / TiOF 2 Preparation method of composite visible light catalyst. Background technique [0002] Currently, for cubic TiOF 2 As a substrate for composite photocatalysts, the ability to effectively improve the photocatalytic performance of procatalysts has been reported in the literature, and it was reported that the cubic TiOF 2 It is prepared by hydrothermal method, such as H.Li, Pengyu Dong(Materials Letters,2015,143(15):20-23), S.Z.Qiao(Chem Commun,47(2011):6138–6140), Hongsen Li(Electrochimica Acta, Volume 62, 15 February 2012, Pages 408-415) have reported the use of TiF 4 As the hydrothermal method of the precursor, Kangle Lv (.Appl.Mater.Interfaces 2013,5,8663-8669), Jiaguo Yu et al. (Journal of Alloys and Compounds,2011,509(13):4557-4562) used phthalic acid butyl ester (TBT) as a precursor, Seung-Taek Myung et al. (Journal of Power Sources...

Claims

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Application Information

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IPC IPC(8): B01J27/135
Inventor 侯晨涛柳文莉丁家国李妍洁杜炎玲
Owner XIAN UNIV OF SCI & TECH
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