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Preparation method of nano cuprous oxide photocatalyst

A nano-cuprous oxide, photocatalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., achieves short time-consuming, simple and readily available raw materials, and conditions mild effect

Inactive Publication Date: 2014-01-15
SUZHOU UNIV OF SCI & TECH
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Problems solved by technology

At present, cuprous oxide has been used as a photocatalyst for the photocatalytic degradation of phenol, methylene blue and other substances [see: (a) Long Jinqiao, Li Yuancheng, Yang Hanyan 2004 Chemical Design 14 42; (b) Chen Jinyi, Liu Xiaoling, Li Changlun 2002 Central China Normal University Journal (Natural Science Edition) 36 200], nano-cuprous oxide used in the degradation of chlorophenol pollutants, especially the impact of nano-cuprous oxide morphology on photocatalytic efficiency has not been reported

Method used

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  • Preparation method of nano cuprous oxide photocatalyst

Examples

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Embodiment 2

[0032] The steps of preparing nano-cuprous oxide photocatalyst are the same as those in Example 1, wherein the amount of deionized water is 452.5 mL, and the amount of NH 2 OH·HCl is 32.5 mL 0.2 mol / L, centrifuged, washed and dried to obtain sample b. The morphology of the catalyst is a chamfered cube with an average particle size of about 300 nm.

Embodiment 3

[0034] The steps of preparing nano-cuprous oxide photocatalyst are the same as those in Example 1, wherein the amount of deionized water is 437.5 mL, and the amount of NH 2 OH·HCl is 47.5 mL 0.2 mol / L, centrifuged, washed and dried to obtain sample c. The morphology of the catalyst is cubo-octahedron, and the average particle size is about 220 nm.

[0035] The catalysts prepared in the above examples were respectively used in the following photocatalytic degradation experiments to investigate the catalytic activity of each catalyst:

[0036] Reaction 1: Weigh 0.01 g of catalyst a, add 100 mL of 4-chlorophenol aqueous solution with an initial concentration of 12.8 mg / L, pH 5.0, and ultrasonically disperse it for about 20 min in a dark room to completely disperse the catalyst in the solution to form an emulsion, And reach saturation adsorption, the reaction temperature is maintained by circulating water bath. Samples were taken regularly, centrifuged, and the supernatant was t...

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Abstract

The invention discloses a preparation method of a nano cuprous oxide photocatalyst, the preparation method comprises the following steps: 1) sequentially adding a CuCl2 solution and a NaOH solution into a certain amount of deionized water; 2) adding surfactant SDS (sodium dodecyl sulfate) under vigorous stirring, performing ultrasonic treatment, adding NH2OH.HCl drop by drop, performing room temperature aging, centrifuging, washing and drying to obtain orange-yellow Cu2O powder. The nano cuprous oxide photocatalyst has a particle diameter of 200-300nm, and can absorb visible light of less than 600nm. Under simulate visible light source irradiation, a 4-chlorophenol degradation photocatalytic reaction is used for evaluation of the catalyst activity, and the nano cuprous oxide photocatalyst can remove about 90% of 4-chlorophenol (the initial concentration is 12.8mg / L) in water within 2 hours. The nano cuprous oxide prepared by the method is a low energy gap photocatalyst with a high solar utilization rate, is used for degradation of chlorophenol pollutants, and has very important practical significance.

Description

technical field [0001] The invention relates to a preparation method of a chemical preparation, in particular to a preparation method of a nanometer cuprous oxide photocatalyst which can be used for degrading 4-chlorophenol (4-CP) in water. Background technique [0002] Chlorophenols are widely used in anticorrosion, insecticide, etc., and are also important chemical raw materials, but they have a great impact on human hormones and immune system. Chlorophenol is a national priority control environmental pollutant, and its degradation research has always been a research hotspot in the field of pollutant treatment. Because the p electron of the chlorine atom in chlorophenol can be conjugated with the electron of the benzene ring, and the chlorine atom can inhibit the activity of benzene ring lyase, so the chlorophenol has strong anti-biodegradation ability [see: Wang Yanli 2009 Anhui Agricultural Science 37 14858], It is difficult to degrade efficiently with conventional wate...

Claims

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Application Information

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IPC IPC(8): B01J23/72C02F1/30
CPCY02W10/37
Inventor 张钱丽柯荣锋魏杰
Owner SUZHOU UNIV OF SCI & TECH
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