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J Colloid Interface Sci

Title:		Urea-H(2)O(2) defect engineering of delta-MnO(2) for propane photothermal oxidation: Structure-activity relationship and synergetic mechanism determination
Author(s):		Feng C; Bi Y; Chen C; Li S; Wang Z; Xin H; Pan Y; Liu F; Lu Y; Liu Y; Zhang R; Li X;
Address:		"Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China; State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China. Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China. Electronic address: liuyq@upc.edu.cn. State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China. Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China. Electronic address: Lixb@qibebt.ac.cn"
Journal Title:		J Colloid Interface Sci
Year:		2023
Volume:		20230311
Issue:
Page Number:		48 - 58
DOI:		10.1016/j.jcis.2023.03.052
ISSN/ISBN:		1095-7103 (Electronic) 0021-9797 (Linking)
Abstract:		"Photothermal catalysis has an advantage in effective and economical elimination technology of volatile organic compounds (VOCs) in the ascendant. Herein, various surface defect engineering routes were adopted to enhance the low-temperature propane oxidation of delta-MnO(2). Compared to reducing etchants urea and vitamin C, delta-MnO(2) treated with urea - H(2)O(2) exhibited an excellent thermal (T(90) = 240 ?SG) and photothermal (T(90) = 196 ?SG) activities of propane oxidation. Urea - H(2)O(2) treatment provided high concentration of Mn(4+) and surface-active oxygen (Mn(4+)-O(sur)) species as surface-active sites, and produced numerous oxygen vacancies to improve charge separation and superoxide species generation capacity. Thus, the photothermal conversion efficiency and low-temperature reducibility were remarkably enhanced. Furthermore, the photothermal synergistic catalytic mechanism was proposed based on in-situ diffuse reflectance infrared Fourier transform spectroscopy and control experiments. The strategy here offered insight into the rational design of efficient transition catalysts, and in-depth understanding of the photothermal catalytic VOCs removal mechanism"
Keywords:		Defect engineering Photothermal catalysis Propane oxidation Reaction mechanism delta-MnO(2);
Notes:		"PubMed-not-MEDLINEFeng, Chao Bi, Yuxi Chen, Chong Li, Shuangju Wang, Zhong Xin, Hongchuan Pan, Yuan Liu, Fang Lu, Yukun Liu, Yunqi Zhang, Runduo Li, Xuebing eng 2023/03/17 J Colloid Interface Sci. 2023 Jul; 641:48-58. doi: 10.1016/j.jcis.2023.03.052. Epub 2023 Mar 11"