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Preparation method and application of a g-c3n4/tio2 heterojunction photocatalytic thin film

A photocatalytic film, g-c3n4 technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. The effect of energy utilization

Active Publication Date: 2018-08-31
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 a g-c3n4/tio2 heterojunction photocatalytic thin film
  • Preparation method and application of a g-c3n4/tio2 heterojunction photocatalytic thin film
  • Preparation method and application of a g-c3n4/tio2 heterojunction photocatalytic thin 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 120mL 0.12mol / L hydrochloric acid solution, hydrolyze and age for 2 weeks at room temperature 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 Fil...

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

A preparation method and application of g‑C3N4 / TiO2 heterojunction photocatalytic film. Hydrolyze tetrabutyl titanate to prepare TiO2 sol. Mix the TiO2 sol and g‑C3N4 ethanol suspension evenly to obtain g‑C3N4 / TiO2 Composite sol; sprayed on the substrate at room temperature to obtain a g‑C3N4 / TiO2 heterojunction photocatalytic film. TiO2 sol is used as a carrier to make g-C3N4 powder into a thin film, which expands the application of g-C3N4 in environmental pollution control; g-C3N4 / TiO2, as a heterojunction photocatalytic film, improves the solar response of TiO2 photocatalysts The utilization rate of light and the efficiency of photocatalytic degradation of pollutants under visible light are significantly enhanced, and can be used to degrade pollutants such as NOx in the air. In the present invention, after the g-C3N4 / TiO2 composite sol is sprayed on the substrate, it can be dried by natural air drying. The preparation method is simple and easy to popularize.

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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Patent Type & Authority Patents(China)
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