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Preparation method of MoS2/Bi2O3 p-n heterojunction photocatalyst and application thereof

A bi2o3p-n, photocatalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, chemical instrument and method, etc., to achieve the effect of improving efficiency, improving photocatalytic activity, and improving separation efficiency

Inactive Publication Date: 2019-04-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently the MoS 2 and Bi 2 o 3 The combination of the two for photocatalytic degradation has not been reported yet

Method used

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  • Preparation method of MoS2/Bi2O3 p-n heterojunction photocatalyst and application thereof
  • Preparation method of MoS2/Bi2O3 p-n heterojunction photocatalyst and application thereof
  • Preparation method of MoS2/Bi2O3 p-n heterojunction photocatalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1)MoS 2 Preparation: 1.00g sodium molybdate dihydrate (Na 2 MoS 2 2H 2 O) and 1.30g thiourea (CS(NH 2 ) 2 ) was dissolved in 60mL of deionized water and stirred until clarified, the resulting mixed liquid was transferred to a 100mL stainless steel autoclave, sealed and reacted at 180°C for 24h, then cooled to room temperature; the obtained product was collected by centrifugation and washed with absolute ethanol and Wash with deionized water three times, and then dry at 60°C for 12 hours to obtain MoS 2 ;

[0037] (2) Bi 2 o 3 Preparation: 5g of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 100mL of deionized water, stirred for 30min, adjusted to pH 8 with 10Mol / L NaOH solution, ultrasonicated for 30min, then stirred for 18h to obtain a precipitate, which was collected by centrifugation and washed with absolute ethanol and deionized water respectively. After washing 3 times, dry at 60 °C for 12 h, and finally the bright yellow precipitate was calcined in air at 400 °C...

Embodiment 2

[0040] (1)MoS 2 Preparation: 1.10g sodium molybdate dihydrate (Na 2 MoS 2 2H 2 O) and 1.40g thiourea (CS(NH 2 ) 2 ) was dissolved in 60mL of deionized water and stirred until clarified, the resulting mixed liquid was transferred to a 100mL stainless steel autoclave, sealed and reacted at 180°C for 24h, then cooled to room temperature; the obtained product was collected by centrifugation and washed with absolute ethanol and Wash with deionized water 3 times, and then dry at 60°C for 12 hours;

[0041] (2) Bi 2 o 3 Preparation: 5g of Bi(NO 3 ) 3 ·5H 2 Dissolve O in 100mL deionized water, stir for 30min, adjust the pH value to 9 with 10Mol / L NaOH solution, then sonicate for 30min, then stir for 20h to obtain a precipitate, which is collected by centrifugation and washed with absolute ethanol and deionized water After 3 times, it was dried at 60°C for 12h, and finally the bright yellow precipitate was calcined in air at 400°C for 2h to obtain Bi 2 o 3 ;

[0042] (3)Mo...

Embodiment 3

[0044] (1)MoS 2 Preparation: 1.20g sodium molybdate dihydrate (Na 2 MoS 2 2H 2 O) and 1.60g thiourea (CS(NH 2 ) 2 ) was dissolved in 60mL of deionized water and stirred until clarified, the resulting mixed liquid was transferred to a 100mL stainless steel autoclave, sealed and reacted at 180°C for 24h, then cooled to room temperature; the obtained product was collected by centrifugation and washed with absolute ethanol and Wash with deionized water 3 times, and then dry at 60°C for 12 hours;

[0045] (2) Bi 2 o 3 Preparation: 5g of Bi(NO 3 ) 3 ·5H 2 Dissolve O in 100mL of deionized water, stir for 30min, adjust the pH value to 10-11 with 10Mol / L NaOH solution, ultrasonicate for 30min, then stir for 24h to obtain a precipitate, collect the precipitate by centrifugation and wash with absolute ethanol and deionized water After each wash 3 times, dry at 60°C for 12h, and finally air calcinate the bright yellow precipitate at 400°C for 2h to obtain Bi 2 o 3 ;

[0046] ...

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Abstract

The invention belongs to the technical field of preparation of environment-friendly materials and relates to a preparation method of a MoS2 / Bi2O3 p-n heterojunction photocatalyst. The preparation method comprises the specific steps: first, preparing MoS2 and Bi2O3; then dissolving MoS2 and Bi2O3 in ethanol; stirring the mixture and carrying out ultrasonic treatment; transferring the mixture to a stainless steel high pressure kettle; sealing the stainless steel high pressure kettle and setting a certain temperature to react; after the reaction, cooling the mixture to room temperature; centrifugalizing and collecting a solid product; then washing the solid product with absolute ethyl alcohol and deionized water; and finally, drying the solid product to obtain the MoS2 / Bi2O3 p-n heterojunction photocatalyst. The MoS2 / Bi2O3 p-n heterojunction photocatalyst prepared by the preparation method has good photocatalytic activity and stability, and the degradation rate to 2-mercaptobenzothiazolereaches 90% within 120 min, so that the photocatalytic degrading efficiency is improved. The preparation method is simple in operating process and relatively low in cost and is a green and environment-friendly efficient treatment technique.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and relates to a kind of MoS 2 / Bi 2 o 3 Preparation method and application of p-n heterojunction photocatalyst. Background technique [0002] In organic chemistry, a class of non-aromatic compounds containing sulfhydryl functional groups (-SH) is called thiols. Structurally speaking, it can be seen as the formation of oxygen in ordinary alcohols replaced by sulfur, among which 2-mercaptobenzothiazole (MBT) is one of the most widely used mercaptans, but mercaptans are bioaccumulative and Biodegradability and other characteristics exist in human and animal bodies for a long time, bringing potential harm to human health and the ecological environment. At present, mercaptans, organic pollutants remaining in the environment, are affecting organisms in the environment in various ways. [0003] 2-Mercaptobenzothiazole is difficult to degrade, and its main degradation ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J37/10C02F1/30C02F1/72C02F101/38C02F101/30
CPCC02F1/30C02F1/725B01J27/051B01J37/10C02F2101/40C02F2101/38C02F2305/10C02F2305/023B01J35/39
Inventor 季蓉张梦瀚马长畅闫永胜
Owner JIANGSU UNIV
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