Oxygen-vacancy-enhanced piezo-photocatalytic performance of AgNbO3

Piezo-photocatalysis (implement by ultrasound vibration and UV-vis light irradiation), a new-emerging strategy, can suppress the rapid recombination of electrons and holes to enhance the catalytic performance. The modulation of interface structures (e.g., the introduction of oxygen vacancies, OVs) p...

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Bibliographic Details
Published inScripta materialia Vol. 206; p. 114234
Main Authors Li, Li, Ma, Yanran, Chen, Gaifang, Wang, Jingsong, Wang, Chunchang
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2022
Subjects
AgNbO3
Degradation
Hydrothermal
Oxygen vacancy
Piezo-photocatalysis
Degradation
Piezo-photocatalysis
AgNbO3
Hydrothermal
Oxygen vacancy
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Summary:Piezo-photocatalysis (implement by ultrasound vibration and UV-vis light irradiation), a new-emerging strategy, can suppress the rapid recombination of electrons and holes to enhance the catalytic performance. The modulation of interface structures (e.g., the introduction of oxygen vacancies, OVs) plays a significant role in the charge-transfer and the catalytic activity. In this paper, the AgNbO3 (ANO) powder was prepared by a facile hydrothermal method. Based on this, we introduce OVs into ANO successfully by annealing in N2 (ANO-N2). The ANO-N2 with OVs exhibits much better piezo-photocatalytic activity for degradation of Rhodamine B (RhB) than the ANO. The result found that OVs can narrow the band gap and improve the UV-vis light absorption, and most importantly, promote the separation of electron hole pairs under electric field to enhance the piezo-photocatalytic performance. The work thus supplies an in-depth understanding of the mechanism between OVs and piezo-photocatalytic performance. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2021.114234