Compound photocatalyst for treating wastewater pollution as well as preparation method and application of compound photocatalyst

A technology of composite light and catalyst, applied in the field of photocatalysis, can solve the problem of low photocatalytic efficiency

Active Publication Date: 2015-04-29
安徽金森源环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the development of semiconductor compounds that can be used for photocatalysis is no longer looking for semiconductor compounds that exist in nature, but tends to artificially synthesize semiconductor compounds, such as CdLa 2 S 4 However, the photocatalytic efficiency of simply using this compound as a photocatalyst is not high

Method used

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  • Compound photocatalyst for treating wastewater pollution as well as preparation method and application of compound photocatalyst
  • Compound photocatalyst for treating wastewater pollution as well as preparation method and application of compound photocatalyst
  • Compound photocatalyst for treating wastewater pollution as well as preparation method and application of compound photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] (1) CdLa 2 S 4 sample preparation

[0101] (1-1) 2.3799g Cd(NO 3 ) 2 ·4H 2 O, 6.6896g La (NO 3 ) 3 ·6H 2 O and 2.5365g of thiourea were placed in 60mL of distilled water, the obtained solution was added to a stainless steel autoclave with a 100mL capacity polytetrafluoroethylene substrate, and a constant temperature reaction was performed at 433K (about 160°C) for 72h to obtain a yellow precipitate,

[0102] (1-2) Rinse the yellow precipitate obtained in step (1-1) with absolute ethanol, and vacuum dry it at 333K (about 60°C) to obtain CdLa 2 S 4 sample;

[0103] (1') Pretreatment of SiC

[0104] (1'-1) The SiC powder was calcined in a muffle furnace at 973K (about 700°C) for 3 hours, and then immersed in a 2% HF solution for 5 hours.

[0105] (1'-2) The solution was suction filtered, rinsed with distilled water for 3 times, and finally dried at 393K (about 120°C) for 12h to obtain a SiC sample;

[0106] (2)SiC / CdLa 2 S 4 Preparation of catalyst samples

...

Embodiment 2

[0110] The method used in this example is the same as that in Example 1, except that 0.005g of SiC is added in step (2-1) to prepare the composite catalyst sample SiC / CdLa 2 S 4 The weight fraction of SiC is 1.0%.

Embodiment 3

[0112] The method used in this example is the same as that in Example 1, except that 0.010 g of SiC is added in step (2-1) to prepare the composite catalyst sample SiC / CdLa 2 S 4 The weight fraction of SiC is 2.0%.

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Abstract

The invention discloses a compound photocatalyst for treating wastewater pollution as well as a preparation method and application of the compound photocatalyst for treating the wastewater pollution. According to the preparation method, a matrix substance CdLa2S4of the compound photocatalyst is compounded once by virtue of a hydrothermal method and is prepared into the compound photocatalyst with a regular shape by virtue of a calcining method. The compound photocatalyst can be utilized for catalytically degrading organic dyes under ultraviolet irradiation, and particularly the efficiency for catalytically degrading azo organic dyes is high.

Description

technical field [0001] The invention belongs to the field of photocatalysis, relates to a composite photocatalyst and its preparation and application, in particular to a composite photocatalyst SiC / CdLa for treating wastewater pollution 2 S 4 and its preparation and application. Background technique [0002] In recent years, with the rapid development of industrial production, the problem of environmental pollution has always received widespread attention. With the continuous improvement of industrial pollution control technology, photocatalytic technology, that is, the use of solar energy for photocatalytic degradation of pollutants, has been increasingly studied in environmental governance. [0003] Another way to study photocatalysts is to find new types of photocatalysts. At present, the development of semiconductor compounds that can be used for photocatalysis is no longer the search for semiconductor compounds that exist in nature, but tends to artificially synthesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/224C02F1/32C02F101/38
CPCY02W10/37
Inventor 李慧泉崔玉民苗慧陶栋梁
Owner 安徽金森源环保工程有限公司
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