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TiO2 @ graphitized carbon nuclear shell compound photocatalyst with high visible light catalytic activity and preparation method thereof

A high catalytic activity, titanium dioxide technology, used in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of small specific surface area and large particles, and achieve large specific surface area, small particle size, The effect of rapid catalytic degradation

Inactive Publication Date: 2012-03-07
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the currently reported titania-graphite-carbon composite photocatalyst particles are larger and the specific surface area is smaller (about 30-60m 2 / g)

Method used

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  • TiO2 @ graphitized carbon nuclear shell compound photocatalyst with high visible light catalytic activity and preparation method thereof
  • TiO2 @ graphitized carbon nuclear shell compound photocatalyst with high visible light catalytic activity and preparation method thereof
  • TiO2 @ graphitized carbon nuclear shell compound photocatalyst with high visible light catalytic activity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Mix 10ml triethylamine, 30ml oleic acid, 40ml cyclohexane, and 2ml n-butyl titanate, add 100ml hydrothermal kettle, keep warm at 165°C for 24h, cool, centrifuge and wash 5 times with absolute ethanol, 80°C Vacuum drying for 12 hours, and then under the protection of high-purity argon, heat treatment at 500°C for 5 hours to obtain a titanium dioxide graphitized carbon core-shell composite photocatalyst. X-ray diffraction test shows that the crystal form of titanium dioxide is 100% anatase, and its crystal grain is about 3.4nm according to Scherrer's formula.

Embodiment 2

[0039] Mix 10ml triethylamine, 30ml oleic acid, 40ml cyclohexane, and 2ml n-butyl titanate, add 100ml hydrothermal kettle, keep warm at 165°C for 24h, cool, centrifuge and wash 5 times with absolute ethanol, 80°C Vacuum drying for 12 hours, and then under the protection of high-purity argon, heat treatment at 600°C for 5 hours to obtain a titanium dioxide graphitized carbon core-shell composite photocatalyst. X-ray diffraction test shows that the crystal form of titanium dioxide is 100% anatase, and the crystal grain is about 5.8nm according to Scherrer's formula.

Embodiment 3

[0041] Mix 10ml triethylamine, 30ml oleic acid, 40ml cyclohexane, and 2ml n-butyl titanate, add 100ml hydrothermal kettle, keep warm at 165°C for 24h, cool, centrifuge and wash 5 times with absolute ethanol, 80°C Vacuum drying for 12 hours, and then under the protection of high-purity argon, heat treatment at 700°C for 5 hours to obtain a titanium dioxide graphitized carbon core-shell composite photocatalyst. X-ray diffraction test shows that the crystal form of titanium dioxide is 100% anatase, and its crystal grain is about 9.8nm according to Scherrer's formula.

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Abstract

The invention discloses a TiO2 @ graphitized carbon nuclear shell compound photocatalyst with a high visible light catalytic activity and a preparation method thereof. The invention has the advantage that the compound photocatalyst has strong absorption not only in an ultraviolet region, but also in visible and near infrared regions. The photocatalyst has the characteristics of small particle size, big specific surface area and the like; when serving as an electrode, the compound photocatalyst prepared by the preparation method has a water decomposition voltage of 0.4V under the irradiation of visible light, which is 0.28V lower than a decomposition voltage (about 0.68V) without the irradiation of visible light, and has a high visible light response activity; and the compound photocatalyst prepared by the preparation method can generate photogenic charge carriers under the irradiation of the visible light, effectively prevent the composition of the photogenic charge carriers and improve the quantum yield so as to achieve a high visible light catalytic activity and quickly catalyze and decompose organic contaminants.

Description

technical field [0001] The invention belongs to the technical scope of composition and preparation of photocatalyst materials, and in particular relates to a titanium dioxide graphitized carbon core-shell composite catalyst with high visible light catalytic activity and a preparation method. Background technique [0002] With the continuous development of the global industrialization process, the problem of environmental pollution is becoming more and more serious, and environmental protection and sustainable development have become the primary issues that human beings must consider. Since Fujishima and Honda discovered single crystal TiO in 1972 2 Electrode photolysis of water and Carey et al successfully made TiO 2 Since it is used for photocatalytic degradation of organic pollutants in water, TiO 2 Photocatalysis has quickly attracted the attention of researchers from all over the world. A large number of studies have shown that various toxic and harmful pollutants in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J21/06B01J35/10A62D3/10
Inventor 罗和安张平赵才贤龙丝曦钟冠群
Owner XIANGTAN UNIV
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