Preparation method and applications of In2S3/BiPO4 heterojunction photocatalyst

A photocatalyst and heterojunction technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as excessive band gap, low quantum efficiency, and reduced photocatalytic activity

Active Publication Date: 2018-06-08
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Tetracycline antibiotics are currently the most widely used antibiotics in the world, but because of their strong persistence, bioaccumulation and biodegradability, they exist in the human body and animals for a long time, which is harmful to human health. Potential harm to the ecological environment
[0004] Well-known BiPO 4 It is a semiconductor material with excellent photocatalytic performance, and its own advantages such as relatively stable and no secondary pollution have become a hot research topic at present, but BiPO 4 There are also some disadvantages, such as (1) the band gap energy is too large, the light absorption wavelength range is mainly in the ultraviolet region, (2) photogenerated electrons and holes are easy to recombine, and the quantum efficiency is low, resulting in a decrease in photocatalytic activity

Method used

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  • Preparation method and applications of In2S3/BiPO4 heterojunction photocatalyst
  • Preparation method and applications of In2S3/BiPO4 heterojunction photocatalyst
  • Preparation method and applications of In2S3/BiPO4 heterojunction photocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) In 2 S 3 preparation of

[0030] 1 mmol InCl 3 and 2 mmol of TAA were dissolved in 40 mL of deionized water and stirred until clear, and the pH was adjusted to 12 with NaOH. The resulting mixed liquid was transferred to a 70 mL stainless steel autoclave, sealed and kept at 120° C. for 12 hours, and then cooled to room temperature. The obtained product was collected by centrifugation, washed several times with absolute ethanol and deionized water, and then dried at 60°C for 12 hours.

[0031] (2) BiPO 4 preparation of

[0032] 1mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 2.5 mL of ethylene glycol and stirred for 30 min to prepare a clear solution. 1.5mmol of NH 4 h 2 PO 4 Dissolve in 30mL of deionized water and slowly add to the above solution. The resulting white suspension was further stirred at room temperature for 30 minutes to achieve homogeneity. The suspension was centrifuged and washed several times with deionized water and absolute ethanol to ...

Embodiment 2

[0039] (1) In 2 S 3 preparation of

[0040] 1 mmol InCl 3 and 2 mmol of TAA were dissolved in 40 mL of deionized water and stirred until clear, and the pH was adjusted to 13 with NaOH. The resulting mixed liquid was transferred to a 70 ml stainless steel autoclave, sealed and kept at 120° C. for 12 hours, and then cooled to room temperature. The obtained product was collected by centrifugation, washed several times with absolute ethanol and deionized water, and then dried at 60°C for 12 hours.

[0041] (2) BiPO 4 preparation of

[0042] 1mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 2.5 mL of ethylene glycol and stirred for 30 min to prepare a clear solution. 1.5mmol of NH 4 h 2 PO 4 Dissolve in 30mL of deionized water and slowly add to the above solution. The resulting white suspension was further stirred at room temperature for 30 minutes to achieve homogeneity. The suspension was centrifuged and washed several times with deionized water and absolute ethanol to ...

Embodiment 3

[0049] (1) In 2 S 3 preparation of

[0050] c. 1 mmol of InCl 3 and 2 mmol of TAA were dissolved in 40 ml of deionized water and stirred until clear, and the pH was adjusted to 14 with NaOH. The resulting mixed liquid was transferred to a 70 ml stainless steel autoclave, sealed and kept at 120° C. for 12 hours, and then cooled to room temperature. The obtained product was collected by centrifugation, washed several times with absolute ethanol and deionized water, and then dried at 60°C for 12 hours.

[0051] (2) BiPO 4 preparation of

[0052] c. Add 1mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 2.5 mL of ethylene glycol and stirred for 30 min to prepare a clear solution. 1.5mmol of NH 4 h 2 PO 4 Dissolve in 30ml of deionized water and slowly add to the above solution. The resulting white suspension was further stirred at room temperature for 30 minutes to achieve homogeneity. The suspension was centrifuged and washed several times with deionized water and absolut...

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Abstract

The invention relates to a preparation method and applications of an In2S3/BiPO4 heterojunction photocatalyst, and belongs to the technical field of environment material preparation. According to thepreparation method, hydrothermal method is adopted, thioacetamide is taken as a sulfur source, sodium hydroxide is adopted to adjust pH value, synthesis of In2S3 nanometer particles (about 10nm) is carried out, simple water bath heating method is adopted so as to coat the surface of rod-shaped BiPO4 with In2S3, and prepare the In2S3/BiPO4 heterojunction photocatalyst. The In2S3/BiPO4 heterojunction photocatalyst is nontoxic, is stable, and is high in photocatalytic activity; construction of heterojunction is capable of improving separation of photo-induced electrons and photo-induced holes, and improving the photocatalytic activity of the photocatalyst.

Description

technical field [0001] The present invention relates to a kind of preparation method and application of In2S3 / BiPO4 heterojunction photocatalyst; 2 S 3 、BiPO 4 Constructing a heterojunction photocatalyst for photocatalytic degradation of tetracycline in wastewater; it belongs to the technical field of environmental material preparation. Background technique [0002] Tetracycline antibiotics are currently the most widely used antibiotics in the world, but because of their strong persistence, bioaccumulation and biodegradability, they exist in the human body and animals for a long time, which is harmful to human health. Potential harm to the ecological environment. At present, pharmaceutical pollutants left in the environment are affecting organisms in the environment in various ways. [0003] The degradation pathways of tetracycline mainly include hydrolysis, photocatalytic degradation and biodegradation. Among them, photocatalytic degradation technology is the most prom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/186C02F1/32C02F101/38C02F101/34
CPCB01J27/186B01J35/004C02F1/32C02F2101/34C02F2101/38C02F2305/10
Inventor 张梦瀚赵晓旭季蓉马长畅高新肖博新黄锦鑫王宜炜闫永胜
Owner JIANGSU UNIV
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