首页|Piezo-photocatalysis of 2,4-DCP using In_2O_3/BiVO_4 Heterojunction: Catalyst development and pollutant degradation mechanism
Piezo-photocatalysis of 2,4-DCP using In_2O_3/BiVO_4 Heterojunction: Catalyst development and pollutant degradation mechanism
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Elsevier
Improving the separation efficiency of photogenerated charge carriers via piezo-effect is a critical strategy for optimizing catalytic performance. In this study, In_2O_3/BiVO_4 (INBV) composite piezo-photocatalysts were synthesized via a two-step hydrothermal method. This composite catalyst demonstrated significantly enhanced catalytic activity due to the synergistic effect of ultrasonic vibration and visible light irradiation. Notably, the degradation efficiency of 40-INBV (40 mg) for 10 mg/L 2,4-dichlorophenol (2,4-DCP) reached 91.67 % within 60 min, representing 1.6-fold and 2.17-fold improvements over pure In_2O_3 (INO) and BiVO_4 (BVO), respectively. The type-S heterojunction structure between INO and BVO was identified as the primary factor driving the significant enhancement of piezo-photocatalytic performance in the composite catalysts. The constructed type-S heterojunction is driven simultaneously by the piezoelectric polarization field and the built-in electric field at the interface. Photoexcitation-induced holes preferentially accumulate on the BVO side due to its strong oxidizing capability, while electrons migrate to the INO side owing to its pronounced reducing property. This spatial separation of photogenerated carriers significantly enhances the production of •O_2~- and •OH radicals, which actively facilitate the redox degradation of 2,4-DCP. The findings of this study demonstrate significant potential for the rapid and efficient degradation of organic pollutants, offering a novel and practical approach to managing refractory pollutants in aquatic environments.
Piezo-photocatalysisType-S heterojunctionDegradation of 2,4-DCPOrganic matter degradation
Shan Zhong、Han Yang、Lishan Zhang、Guoguan Liu、Hangyu Shi、Qian Zhang、Xuan Ru、Yifu Li
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School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, China
Department of Mechanical Engineering, Kettering University, 1700 University Ave, Flint, MI 48504, USA
NETL
NSTL
Elsevier
