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TiO2@C/CdS composite material and preparation method thereof

A composite material, in-situ composite technology, applied in chemical instruments and methods, water/sludge/sewage treatment, chemical/physical processes, etc. Low utilization rate and other problems, to achieve the effect of cost saving and excellent photocatalytic performance

Inactive Publication Date: 2019-11-05
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of industrial technology, the ensuing environmental pollution problem has now seriously threatened people's lives. Photocatalytic technology has broad application prospects in dealing with environmental pollution problems, but photocatalytic technology still faces severe challenges in practical applications. problems, which limit its large-scale application, so it is necessary to develop efficient and stable photocatalytic technology
TiO 2 It is the first material used to study photocatalysis, but it has many shortcomings, such as low utilization rate of sunlight, high recombination rate of photogenerated carriers, etc., through semiconductor recombination, noble metal doping, introduction of defects and heteroatoms and other technologies can be effective Raise TiO 2 Photocatalytic properties of semiconductors

Method used

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  • TiO2@C/CdS composite material and preparation method thereof
  • TiO2@C/CdS composite material and preparation method thereof
  • TiO2@C/CdS composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In the first step, ethanol, tetraethyl orthosilicate and NH 3 ·H 2 O was mixed at a volume ratio of 10:1:4, and magnetically stirred at room temperature for more than 8 hours;

[0035] In the second step, after the precipitate obtained in the first step is centrifugally washed and dried, the temperature is raised to 800°C at a rate of 5°C / min and then calcined for 2 hours to obtain SiO 2 nanospheres;

[0036]In the third step, 100 mg of the sample obtained in the second step was ultrasonically dispersed in deionized water and ethanol solution (volume ratio 1:37), and 0.6 mL of tetrabutyl titanate was added to it, stirred magnetically, transferred to a kettle, and kept at 120°C for 3 hours;

[0037] The fourth step is to take the kettle, cool it down naturally, wash and dry the product by centrifugation, then raise the temperature to 500°C at a rate of 5°C / min and then calcinate for 2 hours to obtain SiO 2 @TiO 2 core-shell structure;

[0038] In the fifth step, 200...

Embodiment 2

[0044] In the first step, ethanol, tetraethyl orthosilicate and NH 3 ·H 2 O was mixed at a volume ratio of 10:1:4, and magnetically stirred at room temperature for more than 8 hours;

[0045] In the second step, after the precipitate obtained in the first step is centrifugally washed and dried, the temperature is raised to 800°C at a rate of 5°C / min and then calcined for 2 hours to obtain SiO 2 nanospheres;

[0046] In the third step, 100 mg of the sample obtained in the second step was ultrasonically dispersed in deionized water and ethanol solution (volume ratio 1:37), and 0.6 mL of tetrabutyl titanate was added to it, stirred magnetically, transferred to a kettle, and kept at 120°C for 3 hours;

[0047] The fourth step is to take the kettle, cool it down naturally, wash and dry the product by centrifugation, then raise the temperature to 500°C at a rate of 5°C / min and then calcinate for 2 hours to obtain SiO 2 @TiO 2 core-shell structure;

[0048] In the fifth step, 20...

Embodiment 3

[0054] In the first step, ethanol, tetraethyl orthosilicate and NH 3 ·H 2 O was mixed at a volume ratio of 10:1:4, and magnetically stirred at room temperature for more than 8 hours;

[0055] In the second step, after the precipitate obtained in the first step is centrifugally washed and dried, the temperature is raised to 800°C at a rate of 5°C / min and then calcined for 2 hours to obtain SiO 2 nanospheres;

[0056] In the third step, 100 mg of the sample obtained in the second step was ultrasonically dispersed in deionized water and ethanol solution (volume ratio 1:37), and 0.6 mL of tetrabutyl titanate was added to it, stirred magnetically, transferred to a kettle, and kept at 120°C for 3 hours;

[0057] The fourth step is to take the kettle, cool it down naturally, wash and dry the product by centrifugation, then raise the temperature to 500°C at a rate of 5°C / min and then calcinate for 2 hours to obtain SiO 2 @TiO 2 core-shell structure;

[0058] In the fifth step, 20...

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Abstract

The invention discloses a TiO2@C / CdS composite material and a preparation method thereof. TiO2@C hollow spheres are prepared by a hard template process, the TiO2@C hollow spheres are compounded with CdS synthesis raw materials in different mass fractions, and the obtained compounded product is washed and dried to prepare the TiO2@C / CdS composite material. The composite and unique hollow structureof three materials is utilized to greatly improve the visible light utilization rate of the catalyst and inhibit the recombination rate of photogenerated carriers. The TiO2@C / CdS composite material prepared in the invention has excellent catalytic performances in the degradation of organic dyes as a photocatalyst.

Description

technical field [0001] The present invention relates to a kind of TiO 2 The @C / CdS composite material and its preparation method belong to the field of micron material preparation. Background technique [0002] With the continuous development of industrial technology, the ensuing environmental pollution problem has now seriously threatened people's lives. Photocatalytic technology has broad application prospects in dealing with environmental pollution problems, but photocatalytic technology still faces severe challenges in practical applications. The problems limit its large-scale application, so it is necessary to develop efficient and stable photocatalytic technology. TiO 2 It is the first material used to study photocatalysis, but it has many shortcomings, such as low utilization rate of sunlight, high recombination rate of photogenerated carriers, etc., through semiconductor recombination, noble metal doping, introduction of defects and heteroatoms and other technologi...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/08C02F1/30C02F1/70C02F101/38C02F101/34C02F101/36C02F101/22
CPCB01J27/04C02F1/30C02F1/70C02F2101/22C02F2305/10C02F2101/38C02F2101/34C02F2101/36B01J35/397B01J35/39B01J35/23B01J35/51
Inventor 刘孝恒曹颖殷鸿飞
Owner NANJING UNIV OF SCI & TECH
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