期刊
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
卷 122, 期 -, 页码 157-167出版社
ELSEVIER
DOI: 10.1016/j.jtice.2021.04.040
关键词
Bio-based microspheres; Photo-catalytic degradation; Titanium dioxide; Grafting
资金
- National Natural Science Foundation of China [21777105]
- Shenzhen Science and Technology Foundations [JCYJ20180507182040308, JCYJ20170818101137960]
A novel biobased polymeric microsphere photocatalyst was developed for the degradation of dyes and antibiotics in wastewater. The microsphere photocatalyst exhibited high degradation efficiency, stability, and recyclability, with promising practical applications.
Photocatalysis, in which carcinogenic compounds are decomposed into harmless products, is the most promising method for the eco-friendly degradation of wastewater pollutants. This study investigated a novel biobased polymeric microsphere photocatalyst produced via the precipitation polymerization of widely available biomass-derived phenylpropenes trans-anethole (ANE) and N-phenylmaleimide (N-PMI). Amino-modified TiO2 nanoparticles were grafted onto the surfaces of the microspheres, thereby producing Poly[ANE+NPMI]-TiO2 microspheres using photocatalysis. The microspheres were used as photocatalysts for the degradation of rhodamine B (RhB) dye and tetracycline (TC) antibiotics in wastewater, where 95% and 97% degradation rates were achieved for 50 mg.L-1 RhB and 100 mg.L-1 TC, respectively. The microsphere photocatalyst exhibited high stability and recyclability, and maintained excellent photocatalytic performance during continued cycling. Kinetic studies demonstrated that the photocatalytic degradation of RhB and TC proceeded according to a pseudo-first-order kinetics model. Furthermore, superoxide free radicals (.O2-) and hydroxyl radicals (.OH) were the primary and secondary reactive species during photo-degradation. Overall, the excellent performance of the simple TiO2-based photocatalyst was clearly demonstrated, and its numerous advantages, such as low energy consumption, low cost, non-toxicity, and environmental friendliness, highlight its promising practical applications. (c) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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