Biochar composite photocatalytic material preparation method

A technology of composite photocatalysis and biochar, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as few research concerns, and achieve cheap sources Easy to obtain, strengthen adsorption, and improve performance

Inactive Publication Date: 2018-07-13
SOUTH CHINA AGRI UNIV
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Problems solved by technology

However, at present, domestic and foreign scholars' research on biochar mainly focuses on adsorption and soil improvement, and few studies focus on its photocatalytic degradation of organic pollutants.

Method used

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  • Biochar composite photocatalytic material preparation method
  • Biochar composite photocatalytic material preparation method

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specific Embodiment

[0049] Case 1:

[0050] Biochar of the present invention-BiVO 4 The preparation method of composite photocatalytic material comprises the following steps:

[0051] 1) Wash the fresh elephant grass with tap water to remove surface impurities (the raw material used in this study comes from the elephant grass in the net room of South China Agricultural University), dry it in the sun, put it in an oven at 60°C and dry it fully, then crush it with a pulverizer, and use it as a raw material for later use;

[0052] 2) Weigh 15g of raw material, fill it in a closed stainless steel thick-walled container, put it into a programmed temperature-controlled muffle furnace, and heat it at 15°C min -1 Raise the temperature to 650°C, then carbonize at a constant temperature for 3 hours, cool down to room temperature naturally, grind the powder and pass through a 100 sieve to obtain the primary product of biochar;

[0053] 3) Treat the primary product of biochar in step 2) with a 1:1 HCl solu...

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Abstract

The invention discloses a preparation method and applications of a biochar composite photocatalytic material, and belongs to the field of environmental functional materials. In the prior art, BiVO4 isa good photocatalytic material, and the affinity of BiVO4 to organic pollutants is not strong, such that the efficient degradation of organic pollutants is not easily achieved. According to the present invention, biochar is doped during the preparation of BiVO4, the biochar-BiVO4 composite material is prepared in the high pressure reaction kettle under the alkaline condition, rhodamine B is addedto the customized visible light reactor, and mass transfer is performed under the deuterium lamp light source by using the composite material as the catalyst; the results show that the composite photocatalytic material has the improved visible light absorption and can enhance the adsorption on organic pollutants by the catalytic material after the biochar is doped; and the composite material canimprove the adsorption on organic pollutants by the photocatalytic material and increase the utilization on visible light by the photocatalytic material so as to improve the photocatalytic degradationefficiency of the BiVO4 material on organic pollutants.

Description

technical field [0001] The invention belongs to the field of environmental functional materials, in particular to a biochar-BiVO 4 Preparation and application of composite photocatalytic materials. Background technique [0002] Rhodamine B is a synthetic dye widely used in papermaking, textile printing and dyeing, leather manufacturing, colored glass coloring, cell fluorescent staining and fireworks. If Rhodamine B dye wastewater is not properly treated, it will cause great harm to human health and the ecological environment, such as biological carcinogenicity. Therefore, it is very important to understand the dye removal methods represented by rhodamine B. Among the various methods for removing rhodamine B, photocatalysis has attracted attention because of its use of clean solar energy, mild reaction conditions, no secondary pollution, and wide application range. [0003] Photocatalytic technology is to degrade pollutants through photocatalytic materials. It is an energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22C02F1/30C02F1/72C02F101/38
CPCB01J23/22B01J35/004C02F1/30C02F1/725C02F2101/308C02F2101/38C02F2305/10
Inventor 黄柱坚蔡丽苗崔理华张杰聪刘怡吴思颖
Owner SOUTH CHINA AGRI UNIV
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