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Chemosphere

Title:		Hollow ZSM-5 zeolite encapsulating Pt nanoparticles: Cage-confinement effects for the enhanced catalytic oxidation of benzene
Author(s):		Tian J; Tan KB; Liao Y; Sun D; Li Q;
Address:		"Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, PR China. Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, PR China. Electronic address: sdaohua@xmu.edu.cn. Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, PR China; College of Food and Biological Engineering, Jimei University, Xiamen, 361021, PR China. Electronic address: kelqb@xmu.edu.cn"
Journal Title:		Chemosphere
Year:		2022
Volume:		20211227
Issue:
Page Number:		133446 -
DOI:		10.1016/j.chemosphere.2021.133446
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"A zeolitic cage was introduced and rationally fabricated by encapsulating Pt nanoparticles (NPs) in hollow ZSM-5, a nanomaterial with a cavity and porous shell, for efficient catalytic oxidation of benzene. The structure and formation of the zeolitic cage were systematically investigated and characterized using transmission electron microscopy, nitrogen sorption investigations, X-ray photoelectron spectroscopy, nuclear magnetic resonance spectroscopy, and X-ray diffraction. The obtained hollow 0.2 Pt@ZSM-5 exhibited a comparable low-temperature catalytic activity with 0.5Pt/ZSM-5 with T(90) value of 178 degrees C. Various characterization techniques combined with adsorption experiments uncover the tremendous role of the zeolitic cage in the catalytic activity toward benzene oxidation. The porous shell prevented benzene dilution and the acidity originating from the hollow interior of ZSM-5 promoted the storage of benzene, thereby forming a high local concentration of benzene around Pt NPs, resulting in excellent catalytic performance. These findings provide valuable insights into the rational design of efficient catalysts for the catalytic oxidation of volatile organic compounds"
Keywords:		Benzene Catalysis *Nanoparticles *Zeolites Noble metal catalyst Pt nanoparticles Volatile organic compounds Zeolitic cage;
Notes:		"MedlineTian, Jian Tan, Kok Bing Liao, Yichen Sun, Daohua Li, Qingbiao eng England 2021/12/31 Chemosphere. 2022 Apr; 292:133446. doi: 10.1016/j.chemosphere.2021.133446. Epub 2021 Dec 27"