Bi2WO6-Cu2S复合材料的制备及其有机物降解应用

doi:10.3976/j.issn.1002-4026.2023.01.010

Abstract

Abstract:

Owing to the low visible-light utilization of traditional photocatalysts and the serious problem of photogenerated electron-hole recombination at the bulk/interface, two-dimensional Bi₂WO₆ nanosheets were prepared herein using the hydrothermal method. Based on the principle of energy-level matching, Cu₂S was grown on the surface of the two-dimensional Bi₂WO₆ nanosheets using the hydrothermal method to construct Bi₂WO₆-Cu₂S heterojunctions for improved light absorption. Based on the excellent piezoelectric properties of the nanosheets and the excellent optical absorption and carrier transport properties of the Bi₂WO₆-Cu₂S heterojunctions, a piezo-photoelectric synergistic catalytic system was constructed and the optimal degradation experimental conditions were explored. The Bi₂WO₆-Cu₂S material was successfully applied for the degradation of Rhodamine B(RhB) in water. The results showed that under the synergistic photoelectric-piezoelectric effect, the degradation rate of RhB by the designed Bi₂WO₆-Cu₂S reached 87% in 40 min. This study provides a new way for designing unique heterojunction structures via the synergistic action of photocatalysis and piezoelectric catalysis.

Key words: photoelectrochemistry, piezotronic effect, heterostructure, Bi₂WO₆, Cu₂S, charge carrier separation, organic-dye degradation

CLC Number:

O611.6

YANG Mengchun, WANG Yanhu, WANG Xiao. Fabrication of Bi₂WO₆-Cu₂S heterostructures for piezo-photoelectric degradation of organic dye[J].Shandong Science, 2023, 36(1): 74-83.

Figures/Tables 10

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References 15

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仪器名称	型号	生产厂家
氟掺杂的氧化铟锡导电玻璃(FTO)	2.2 mm,膜厚500 nm	华南湘城科技有限公司
氙灯光源	PLS-SXE 300UV EC550	北京泊菲莱科技有限公司
电化学工作站	CHI 660E	上海辰华公司
扫描电子显微镜	SUPRA 55	德国ZEISS集团
透射电子显微镜	FEI Talos F200X	美国FEI公司
X射线衍射仪	Bruker D8	德国 Bruker 公司
仪器名称	型号	生产厂家
紫外可见分光光度计	UV-3600	日本岛津公司
电热鼓风干燥箱	DHG-9075A	上海一恒科学仪器有限公司
共聚焦拉曼显微镜	LabRam HR800	法国HORIBA Jobin Yvon公司
压电力显微镜	HF2LI	瑞士苏黎世仪器
紫外可见近红外漫反射仪	3600plus	日本岛津公司

药品名称	分子式	生产厂家
二乙二醇(二甘醇)	C₄H₁₀O₃	上海麦克林生物化学有限公司
硫代乙酰胺	C₂H₅NS	国药集团化学试剂有限公司
乙二醇	C₂H₆O₂	国药集团化学试剂有限公司
五水硝酸铋	Bi(NO₃)₃·5H₂O	国药集团化学试剂有限公司
乙二胺四乙酸(EDTA)	C₁₀H₁₆N₂O₈	天津市科密欧化学试剂有限公司
二水合钨酸钠	Na₂WO₄·2H₂O	国药集团化学试剂有限公司
氢氧化钠	NaOH	国药集团化学试剂有限公司
无水醋酸铜	C₄H₆O₄Cu	阿拉丁试剂(上海)有限公司
硫脲	H₂NCSNH₂	国药集团化学试剂有限公司
无水硫酸钠	Na₂SO₄	国药集团化学试剂有限公司

Fabrication of Bi₂WO₆-Cu₂S heterostructures for piezo-photoelectric degradation of organic dye

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Fabrication of Bi2WO6-Cu2S heterostructures for piezo-photoelectric degradation of organic dye

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Fabrication of Bi₂WO₆-Cu₂S heterostructures for piezo-photoelectric degradation of organic dye