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Nanometer ZnO/graphene photo-catalyst and preparation method thereof

A nano-photocatalyst and photocatalyst technology, applied in the field of photocatalyst and its preparation, can solve the problems of not being widely used, complex processing process, expensive CNT and C60, etc., and achieve low cost, good photocatalytic effect, photocatalytic The effect of improving the degradation rate

Inactive Publication Date: 2012-05-02
SHANGHAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, since CNT and C 60 The price is relatively expensive and the processing process is complicated, neither of which has been widely used

Method used

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  • Nanometer ZnO/graphene photo-catalyst and preparation method thereof
  • Nanometer ZnO/graphene photo-catalyst and preparation method thereof
  • Nanometer ZnO/graphene photo-catalyst and preparation method thereof

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preparation example Construction

[0025] The preparation method of graphite oxide please refer to (1. Hummers, W. S.; Offeman, R. E. Preparation of Graphitic

[0026] Oxide. J. Am. Chem. Soc. 1958, 80, 1339;

[0027] 2. Wang, Y.; Li, Y. M.; Tang, L. H.; Lu, J.; Li, J. H. Application ofGraphene-Modi?ed Electrode for Selective Detection of Dopamine. Electrochem. Commun. 2009, 11, 889.).

[0028] The preparation method of the graphite oxide of the present embodiment is: 2.5g P 2 o 5 , 2.5 g K 2 S 2 o 8 Add to Erlenmeyer flask, shake well, slowly add H 2 SO 4 , heated to 80°C in an oil bath, and then added 3 g Graphite powder, keep the temperature at 80°C for 4.5 h; cool at room temperature, use 500 ml Stir for 30 min after diluting with water, then stand still for 20 h; filter with suction and dry; 120 ml H 2 SO 4 Add it into the Erlenmeyer flask, add the above filter residue, and slowly add 15 g KMnO 4 , the temperature should be lower than 20°C, then put the Erlenmeyer flask into an oil b...

Embodiment 1

[0030] 1.1 Reagents and Instruments

[0031] Graphite powder (graphite powder, C.P., Sinopharm Chemical Reagent Co., Ltd.), P 2 o 5 (A.R., Sinopharm Chemical Reagent Co., Ltd.), H 2 SO 4 (G.R., Sinopharm Chemical Reagent Co., Ltd.), K 2 S 2 o 8 (A.R., Sinopharm Chemical Reagent Co., Ltd.), KMnO 4 (A.R., Sinopharm Chemical Reagent Co., Ltd.), H 2 o 2 (A.R., Sinopharm Chemical Reagent Co., Ltd.), ZnNO 3 (A.P., Sinopharm Chemical Reagent Co., Ltd.), (NH 4 ) 2 CO 3 (A.P., Sinopharm Chemical Reagent Co., Ltd.), and the experimental water was deionized water. The main instruments are CR21GⅡ high-speed refrigerated centrifuge (Hitachi, Japan), U-3010 UV-visible spectrophotometer (Hitachi, Japan), JEOL-200CX transmission electron microscope (Japan Electronics Co., Ltd.), JSM-2010F X-ray powder Diffraction instrument (JEOL Ltd.), JSM-6700F high-resolution scanning electron microscope (JEOL Ltd.), AVATAR 370 infrared spectrophotometer (Thermo Nicolet, USA); photocatalytic...

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Abstract

The invention relates to a nanometer ZnO / graphene photo-catalyst and a preparation method thereof. The photo-catalyst is a composite nanometer photo-catalyst which adopts the graphene as the frame and is carried with ZnO, wherein the mass rate of the graphene and the ZnO nanometer particles is 1:100-10:100. Because of adding of GS, the recombination rate of the electron-hole is reduced, and the photo-degradation ratio is greatly improved during the process of degrading methyl oranges under the irradiation of ultraviolet lights. If optimization of parameters is considered, If optimization of parameters, such as optimum ratio of the adding quantities of ZnO and GS, and the influences of pH and temperature are considered, so the prepared ZnO / GS combined catalyst has low cost, can be recycled and used, has good photo-catalyst effect, and can be applied to the photo-catalyst treatment of industrial waste water and waste gas.

Description

technical field [0001] The invention relates to a photocatalyst and a preparation method thereof, in particular to a nanometer ZnO-graphene photocatalyst and a preparation method thereof. Background technique [0002] Hot spots for photocatalytic degradation of organic pollutants in water and air. Semiconductor photocatalysts are non-toxic and can degrade a wide range of pollutants at relatively mild temperatures and pH. So far, TiO 2 It is considered as one of the best semiconductor photocatalysts. However, studies have shown that ZnO has shown special value in degrading some pollutants, such as sewage from bleaching pulp mills, phenol and 2-phenylphenol, etc. Moreover, some studies have proved that ZnO has the same effect as TiO 2 The same photodegradation mechanism. [0003] However, due to its own forbidden bandwidth, the generated electron-hole pairs are not only easy to recombine, but also have a short life span and a narrow photoresponse range, which limits the ph...

Claims

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Application Information

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IPC IPC(8): B01J23/06
Inventor 尹东光张乐刘斌虎
Owner SHANGHAI UNIV
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