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Preparation method and application of g-C3N4/TiO2 heterojunction photocatalytic film

A photocatalytic thin film, g-c3n4 technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex preparation process, achieve simple preparation method and improve light energy utilization rate , the effect of enhancing efficiency

Active Publication Date: 2016-06-15
INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the photocatalytic films prepared by these patents all have problems such as complicated preparation process and need for laser and high temperature treatment.

Method used

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  • Preparation method and application of g-C3N4/TiO2 heterojunction photocatalytic film
  • Preparation method and application of g-C3N4/TiO2 heterojunction photocatalytic film
  • Preparation method and application of g-C3N4/TiO2 heterojunction photocatalytic film

Examples

Experimental program
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Embodiment 1

[0028] A high-efficiency g-C 3 N 4 / TiO 2 The preparation of heterojunction photocatalytic thin film comprises the following steps:

[0029] (1) Using the peptization method, add 12mL tetrabutyl titanate to 120mL0.12mol / L hydrochloric acid solution, hydrolyze and age at room temperature for 2 weeks to obtain TiO 2 Sol;

[0030] Preparation of g-C by Ultrasonic Pulverization 3 N 4 Ethanol suspension: add g-C 3 N 4 Dispersed in ethanol, continuously ultrasonicated at 400W for 4h, to obtain g-C 3 N 4 Ethanol suspension; where, g-C 3 N 4 The ratio with ethanol is 0.001g: 100mL.

[0031] TiO 2 Sol and g-C 3 N 4 The suspension is mixed uniformly according to the volume ratio of 1:1 to obtain g-C 3 N 4 / TiO 2 Composite sol;

[0032] (2) put g-C 3 N 4 / TiO 2 Composite sol adopts pressure spraying method, under 6KPa pressure, in 10*10cm 2 Spray 2 to 4 times on the glass substrate, air dry naturally to get g-C 3 N 4 / TiO 2 Heterojunction Photocatalytic Thin Film...

Embodiment 2

[0034] The difference from Example 1 is that TiO 2 Sol and g-C 3 N 4 The suspension volume ratio is 1:5.

Embodiment 3

[0036] The difference from Example 1 is that TiO 2 Sol and g-C 3 N 4 The suspension volume ratio is 1:10.

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Abstract

The invention provides a preparation method and application of a g-C3N4 / TiO2 heterojunction photocatalytic film.Tetrabutyl titanate is hydrated so that TiO2 sol can be prepared, the TiO2 sol and g-C3N4 ethanol suspension liquid are evenly mixed, and g-C3N4 / TiO2 compound sol is obtained; the g-C3N4 / TiO2 compound sol is sprayed on a substrate at normal temperature, and the g-C3N4 / TiO2 heterojunction photocatalytic film is obtained.The TiO2 sol serves as a carrier, g-C3N4 powder is prepared into a film, and application of g-C3N4 to environment pollution treatment is expanded; g-C3N4 / TiO2 serves as the heterojunction photocatalytic film, the sunlight utilizing rate achieved through a TiO2 photocatalyst is increased, the photocatalytic pollutant degradation efficiency is remarkably enhanced under visible light, and the g-C3N4 / TiO2 heterojunction photocatalytic film can be used for degradation of NOx and other pollutants in air.In the preparation method, after the g-C3N4 / TiO2 compound sol is sprayed on the substrate, natural airing is adopted for drying, and the preparation method is simple and convenient, and popularization is easy.

Description

technical field [0001] The invention belongs to the field of photocatalytic thin films and relates to a g-C 3 N 4 / TiO 2 Preparation method and application of heterojunction photocatalytic thin film. Background technique [0002] Energy shortage and environmental pollution are major challenges facing human society in the 21st century. The application of photocatalytic technology has brought new opportunities for energy utilization and environmental protection. Thin film materials often have excellent properties that bulk materials do not have, and are more suitable for popularization and application. Therefore, photocatalytic thin films have attracted more and more attention not only in the field of research, but also in industrial production and daily life applications. TiO 2 As one of the most widely studied and practical materials in the field of semiconductor photocatalysis, it has the advantages of low cost, non-toxicity, high photocatalytic efficiency, and stable p...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00B01J37/02B01D53/86B01D53/56
CPCB01D53/8628B01J27/24B01J37/0215B01J37/0236B01D2258/06B01J35/39
Inventor 黄宇王鹏鸽王震宇曹军骥
Owner INST OF EARTH ENVIRONMENT CHINESE ACAD OF SCI