Bi-MOFs with two different morphologies promoting degradation of organic dye under simultaneous photo-irradiation and ultrasound vibration treatment

• Published in: Ultrasonics sonochemistry Vol. 91; p. 106223
• Main Authors: Dong, Shanghai, Wang, Liying, Lou, Weiyi, Shi, Yunxin, Cao, Zhenzhu, Zhang, Yongfeng, Sun, Junmin
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.12.2022; Elsevier
• Subjects: Bismuth-based MOFs; Environmental remediation; Original; Piezo-photocatalysis; Piezoelectric property; Bismuth-based MOFs; Piezo-photocatalysis; Environmental remediation; Piezoelectric property
• ISSN: 1350-4177; 1873-2828
• DOI: 10.1016/j.ultsonch.2022.106223

For the first time, piezocatalysis activity has been observed in bismuth-based MOFs (ultrasound vibration treatment) with two different morphologies, namely FCAU-17 (flakes) and CAU-17 (rods). CAU-17 and FCAU-17 were synthesized by solvothermal and ultrasonic methods, respectively, with the same organic ligand (1,3,5-benzenetricarboxylic acid) and metal salt (Bi(NO3)3·5H2O). Among these, the apparent rate constant k of CAU-17 in piezo-photocatalysis is 3.9 × 10−2 min−1, which is ∼3.9 and ∼ 1.5 times of those in photocatalysis and piezocatalysis, respectively. CAU-17 showed much high piezo-photocatalytic activity during degradation of RhB. Efficiently coupling between piezocatalysis and photocatalysis has been realized in rod-like CAU-17 (ultrasound vibration treatment). Our results provide a new strategy to improve catalytic performance of Bi MOFs through an efficient synergistic piezo-photocatalysis approach for environmental remediation. •Bismuth-based MOFs with two different morphologies were synthesized.•The piezoelectric property of CAU-17 was first discovered.•CAU-17 was used for piezo-photocatalysis under processing of light and ultrasound.•The removal efficiency of RhB by pure CAU-17 was 96.1% in 80 min.