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Composite photocatalyst for photocatalytic water splitting for hydrogen generation and preparation method and application of composite photocatalyst

A composite light and catalyst technology, applied in the field of photocatalysis, can solve the problems of unsatisfactory hydrogen production rate and low photocatalytic efficiency of photolysis of water

Active Publication Date: 2015-04-29
安徽杰清环保科技有限公司
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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 using this compound as a photocatalyst is not high, and the rate of hydrogen production from photolysis of water is not satisfactory.

Method used

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  • Composite photocatalyst for photocatalytic water splitting for hydrogen generation and preparation method and application of composite photocatalyst
  • Composite photocatalyst for photocatalytic water splitting for hydrogen generation and preparation method and application of composite photocatalyst
  • Composite photocatalyst for photocatalytic water splitting for hydrogen generation and preparation method and application of composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] (1) CdLa 2 S 4 sample preparation

[0126] (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, and the resulting solution was added to a stainless steel autoclave with a PTFE substrate of 100mL capacity, and reacted at a constant temperature of 433K (about 160°C) for 72h to obtain a yellow precipitate.

[0127] (1-2) Rinse the yellow precipitate obtained in step (1-1) with absolute ethanol, and dry it under vacuum at 333K (about 60°C) to obtain CdLa 2 S 4 sample;

[0128] (1') Pretreatment of SiC

[0129] (1'-1) The SiC powder was calcined in a 973K (about 700°C) muffle furnace for 3 hours, and then immersed in a 2% HF solution for 5 hours,

[0130] (1'-2) Suction filter the solution, rinse with distilled water three times, and finally dry at 393K (about 120°C) for 12h to obtain a SiC sample;

[0131] (2)SiC / CdLa 2 S 4 Catalyst sample preparation

[0132] (2-1) Accurately weigh the Cd...

Embodiment 2

[0135] The method used in this example is the same as Example 1, the only difference is that 0.005g SiC is added in step (3-1) to obtain a composite catalyst sample SiC / CdLa 2 S 4 The weight fraction of SiC in is 1.0%.

Embodiment 3

[0137] The method used in this example is the same as Example 1, the only difference is that 0.010g SiC is added in step (3-1) to obtain a 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 composite photocatalyst SiC / CdLa2S4 and a preparation method and application of the composite photocatalyst SiC / CdLa2S4. A hydrothermal method is adopted for synthesizing a composite photocatalyst matrix substance CdLa2S4 by one step, and the composite photocatalyst with the regular morphology is prepared by adopting a burning method. The composite photocatalyst can catalytically degrade organic dyes under UV irradiation, has high efficiency on degrading ozo organic dyestuffs particularly, and also can decompose water to generate a clean energy substance-hydrogen under the UV irradiation.

Description

technical field [0001] The invention belongs to the field of photocatalysis and relates to a composite photocatalyst and its preparation and application, in particular to a composite photocatalyst SiC / CdLa 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 been widely concerned by people. With the continuous improvement of industrial pollution control technology, photocatalytic technology, that is, the use of solar energy to photocatalytically degrade pollutants, has been studied more and more deeply in environmental governance. [0003] At the same time, with the development and progress of society, the energy problem is becoming more and more severe. Among the many petroleum alternative energy substances, hydrogen is a new type of green energy substance because it is non-polluting and the combustion product is water that can be used by hu...

Claims

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Application Information

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IPC IPC(8): B01J27/224C02F1/32C01B3/04C01G11/02
CPCY02E60/36Y02W10/37
Inventor 崔玉民李慧泉苗慧陶栋梁
Owner 安徽杰清环保科技有限公司
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