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Preparation method of (BiO) 2OH/La (OH) 3 composite visible-light-driven photocatalyst and application thereof

A catalyst and visible light technology, applied in the field of photocatalysis, can solve the problems of complex preparation process and high cost

Pending Publication Date: 2022-01-11
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned modification methods generally have disadvantages such as high cost and complicated preparation process.

Method used

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  • Preparation method of (BiO) 2OH/La (OH) 3 composite visible-light-driven photocatalyst and application thereof
  • Preparation method of (BiO) 2OH/La (OH) 3 composite visible-light-driven photocatalyst and application thereof
  • Preparation method of (BiO) 2OH/La (OH) 3 composite visible-light-driven photocatalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Pure (BiO) 2 Preparation of OHCl:

[0055] To 0.97g Bi(NO 3 ) 3 Add 20mL deionized water and 2mmol KCl to the solid, then add concentrated ammonia water to adjust the pH to 10, transfer the solution after continuous stirring for 60min into a 50ml polytetrafluoroethylene reactor, keep it at 180°C for 12h, and wait for the product to cool down to room temperature naturally Suction filtration, repeated washing with deionized water and ethanol until neutral during the suction filtration process, the sample was taken out and dried (60°C, 12h) to obtain (BiO) 2 OHCl. Among them, the prepared pure sample (BiO) 2 The SEM picture of OHCl is as follows figure 1 shown.

[0056] Pure La(OH) 3 Preparation of:

[0057] To La(NO 3 ) 3Add 20mL deionized water to the solid, then add concentrated ammonia water to adjust the pH to 10, transfer the solution after continuous stirring for 60min into a 50ml polytetrafluoroethylene reactor, keep it at 180°C for 12h, and wait for the ...

Embodiment 2

[0065] (BiO) proposed by the second embodiment of the present invention 2 OHCl / La(OH) 3 The preparation method of composite visible light catalyst specifically comprises the following steps:

[0066] Step 1, prepare La(OH) 3 sample:

[0067] To La(NO 3 ) 3 Add 20ml of deionized water to the solid, then add concentrated ammonia water to adjust the pH to 10, transfer the solution after continuous stirring for 60min into a 50ml polytetrafluoroethylene reactor, keep it at a high temperature of 180°C for 12h, and wait for the product to cool naturally After reaching room temperature, perform suction filtration. During the suction filtration process, wash repeatedly with deionized water and ethanol until neutral. Take out the sample and dry it at 60°C for 12 hours to obtain La(OH) 3 sample;

[0068] Step 2, prepare (BiO) 2 OHCl / La(OH) 3 Composite visible light catalyst:

[0069] To 0.97g Bi(NO 3 ) 3 Add 20mL deionized water and 2mmol KCl to the solid, then add concentrate...

Embodiment 3

[0072] (BiO) proposed by the third embodiment of the present invention 2 OHCl / La(OH) 3 The preparation method of composite visible light catalyst specifically comprises the following steps:

[0073] Step 1, prepare La(OH) 3 sample:

[0074] To La(NO 3 ) 3 Add 20ml of deionized water to the solid, then add concentrated ammonia water to adjust the pH to 10, transfer the solution after continuous stirring for 60min into a 50ml polytetrafluoroethylene reactor, keep it at a high temperature of 180°C for 12h, and wait for the product to cool naturally After reaching room temperature, perform suction filtration. During the suction filtration process, wash repeatedly with deionized water and ethanol until neutral. Take out the sample and dry it at 60°C for 12 hours to obtain La(OH) 3 sample;

[0075] Step 2, prepare (BiO) 2 OHCl / La(OH) 3 Composite visible light catalyst:

[0076] To 0.97g Bi(NO 3 ) 3 Add 20mL deionized water and 2mmol KCl to the solid, then add concentrated...

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Abstract

The invention provides a preparation method of a (BiO)2OH / La(OH)3 composite visible-light-driven photocatalyst and an application thereof. The method comprises the following steps: adding deionized water into a La (NO3)3 solid, adding stronger ammonia water to adjust the pH value to 10, transferring the stirred solution into a reaction kettle, keeping for 12 hours at high temperature, naturally cooling to room temperature, carrying out suction filtration, taking out a sample, and drying to obtain a La(OH)3 sample; adding deionized water and KCl into a Bi(NO3)3 solid, adding stronger ammonia water to adjust the pH value to 10, stirring, adding a La(OH)3 sample, transferring the stirred solution into a reaction kettle, keeping for 12 hours at a high temperature, naturally cooling to room temperature, carrying out suction filtration, taking out the sample, and drying to obtain the (BiO)2OH / La(OH)3 composite visible-light-driven photocatalyst. The pressure of waste treatment and environmental pollution can be relieved, and efficient catalytic degradation of industrial wastewater is achieved.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a (BiO) 2 OHCl / La(OH) 3 Preparation method and application of composite visible light catalyst. Background technique [0002] With the rapid development of industry, the discharge of various types of industrial wastewater has increased rapidly, leading to increasingly serious problems of water body environment and water resource pollution, which in turn threaten human health and safety. Among them, organic pollutants in wastewater are characterized by high toxicity, chemical stability, and difficulty in biodegradation, and can absorb and reflect sunlight entering the water to interfere with the growth of bacteria and other organisms, causing very serious harm to the ecological environment. Therefore, how to efficiently treat organic pollutants in industrial wastewater has become a difficult problem to be solved urgently in the field of environmental protection technology...

Claims

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Application Information

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IPC IPC(8): B01J23/18C02F1/30C02F101/38
CPCB01J23/18C02F1/30C02F2305/10C02F2101/38B01J35/39Y02W10/37
Inventor 黄微雅徐冲陈勋俊杨凯陈喜蓉
Owner JIANGXI UNIV OF SCI & TECH