Enhancing photodegradation of Methyl Orange by coupling piezo-phototronic effect and localized surface plasmon resonance

Piezo-potential promoted photocatalysis enables a scalable and high-efficiency dye decomposition by conjugating the photoexcitation and mechanical stimulus. However, its catalytic efficiency is significantly restricted by the limited quantum yield and piezoelectric activity of catalysts. Herein, a h...

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Bibliographic Details
Published in:Nano energy 2023-04, Vol.108, p.108234, Article 108234
Main Authors: Li, Jing, Xie, Guangzhong, Jiang, Jin, Liu, Yanyou, Chen, Chunxu, Li, Weixiong, Huang, Junlong, Luo, Xiaolan, Xu, Ming, Zhang, Qiuping, Yang, Min, Su, Yuanjie
Format: Article
Language:English
Subjects:
CdS-Au composite
Photocatalysis
Piezophototronic effect
Pollutant degradation
Surface plasmon resonance
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Summary:Piezo-potential promoted photocatalysis enables a scalable and high-efficiency dye decomposition by conjugating the photoexcitation and mechanical stimulus. However, its catalytic efficiency is significantly restricted by the limited quantum yield and piezoelectric activity of catalysts. Herein, a heterogeneous CdS-Au composite photocatalyst was synthesized via a facile water bath heating and reflux condensation method for organic pollutants degradation. The synergism between piezo-phototronic effect and localized surface plasmon resonance facilitates photon-generated carrier separation and internal quantum efficiency. The loading of Au nanoparticles remarkably modulates the morphologies, surface defect, effective optronics utilization and photocatalytic activities of CdS nanospheres. A 2.3 folds enhancement in the photodegradation of Methyl Orange (MO) was observed with the optimal 4 mol% Au loading. Furthermore, the impact of frequency and intensity of ultrasonication on the electrochemical impedance and photocatalytic activity was systematically investigated. This work offers a promising approach for harnessing noise or vibration for environmental remediation and opens up a new route for designing and developing high-performance piezo-photocatalyst. [Display omitted] •The synergism between surface plasma and piezo-phototronic effect was proposed.•A 2.3 folds enhancement in degradation was attained by loading 4 mol% Au NPs.•The impact of ultrasonic frequency and intensity on degradation was investigated.•Photogenerated carrier separation and internal quantum efficiency were improved.
ISSN:2211-2855
DOI:10.1016/j.nanoen.2023.108234