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Xu M, Deng Y, Li S, Zheng J, Liu J, Tremblay PL, Zhang T. Bacterial cellulose flakes loaded with Bi 2MoO 6 nanoparticles and quantum dots for the photodegradation of antibiotic and dye pollutants. CHEMOSPHERE 2023; 312:137249. [PMID: 36400196 DOI: 10.1016/j.chemosphere.2022.137249] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 11/11/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
Effective strategies to improve charge separation in semiconductor particles are critical for improving the photodegradation of organic pollutants at levels sufficient for environmental applications. Herein, Bi2MoO6 (BMOMOF), comprising both nanoparticles (NPs) and quantum dots (QDs), was synthesized from a bismuth-based metal-organic framework (Bi-MOF) precursor. Surface defects on BMOMOF, the combination of NPs and QDs, and modified energy band edges improved photogenerated charge separation and facilitated redox reactions. When compared to BMO derived from uncoordinated Bi, the BMOMOF photocatalyst (PC) was more efficient at photodegrading tetracycline hydrochloride (TCH) and ciprofloxacin (CIP), two widely-used antibiotics ubiquitous in wastewater, as well as the carcinogenic pollutant rhodamine B (RhB). BMOMOF was then loaded on the biopolymer bacterial cellulose (BC) to further enhance photocatalytic performance and facilitate the recovery of the PC after water treatment processes. The novel BMOMOF/BC photocatalytic flakes were significantly larger than pure BMOMOF, and thus easier to recuperate. Furthermore, anchoring BMOMOF on BC flakes augmented significantly the photodegradation of TCH, CIP, and RhB, mainly because hydroxyl groups in BC act as hole traps facilitating photogenerated electron-hole separation. Results obtained with BMOMOF/BC highlight promising approaches to develop optimal PCs for aqueous pollutants degradation.
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Affiliation(s)
- Mengying Xu
- Shaoxing Institute for Advanced Research, Wuhan University of Technology, Shaoxing, 312300, PR China; School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, 430070, PR China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Yichao Deng
- School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Shanhu Li
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Jingyan Zheng
- School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Jieyu Liu
- School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, 430070, PR China
| | - Pier-Luc Tremblay
- Shaoxing Institute for Advanced Research, Wuhan University of Technology, Shaoxing, 312300, PR China; School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, 430070, PR China.
| | - Tian Zhang
- Shaoxing Institute for Advanced Research, Wuhan University of Technology, Shaoxing, 312300, PR China; School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, 430070, PR China; State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, PR China; Sanya Science and Education Innovation Park, Wuhan University of Technology, Sanya, 572024, PR China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, PR China; School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, PR China.
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