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J Colloid Interface Sci

Title:		"Boosting total oxidation of acetone over spinel MCo(2)O(4) (M?ª+=?ª+Co, Ni, Cu) hollow mesoporous spheres by cation-substituting effect"
Author(s):		Zhang C; Wang J; Yang S; Liang H; Men Y;
Address:		"College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, PR China. Electronic address: Jinguowang1982@sues.edu.cn"
Journal Title:		J Colloid Interface Sci
Year:		2019
Volume:		20181217
Issue:
Page Number:		65 - 75
DOI:		10.1016/j.jcis.2018.12.061
ISSN/ISBN:		1095-7103 (Electronic) 0021-9797 (Linking)
Abstract:		"Boosting total oxidation of volatile organic compounds (VOCs) over spinel Co(3)O(4) by cation-substituting effect is an effective solution, but the underlying mechanism has not yet been clearly elucidated. Herein, a series of spinel MCo(2)O(4) (M?ª+=?ª+Co, Ni, Cu) hollow mesoporous spheres (HMS) have been synthesized by solvothermal alcoholysis with goals to elaborate the cation-substituting effect on spinel Co(3)O(4) for total oxidation of VOCs. The physicochemical properties of spinel MCo(2)O(4) (M?ª+=?ª+Co, Ni, Cu) HMS have been well characterized and correlated with their catalytic activities. Results reveal that CuCo(2)O(4) HMS exhibited superior catalytic activity than those of NiCo(2)O(4) and CoCo(2)O(4) HMS for total oxidation of acetone and their catalytic activities followed the sequence of CuCo(2)O(4)?ª+>?ª+NiCo(2)O(4)?ª+>?ª+CoCo(2)O(4). This phenomenon can be attributed to the cation-substituting effect, which resulted in the synthesized catalysts with different amounts of surface Co(3+) cations, active oxygen species, defective sites and reducible capabilities. Meanwhile, kinetics studies offer direct evidence to support that the cation-substituting effect played the decisive role in determining the catalytic activity, and the underlying mechanism has been proposed by correlating the structure-activity relationship. Moreover, CuCo(2)O(4) HMS also showed excellent long-term stability and good water tolerance due to its highly stable crystal phase and robust morphological structure, demonstrating its potential applications in the field of VOCs elimination"
Keywords:		Cation-substituting effect Hollow mesoporous spheres Spinel Co(3)O(4) Total oxidation of acetone VOCs;
Notes:		"PubMed-not-MEDLINEZhang, Chi Wang, Jinguo Yang, Shuaifeng Liang, Hao Men, Yong eng 2018/12/24 J Colloid Interface Sci. 2019 Mar 15; 539:65-75. doi: 10.1016/j.jcis.2018.12.061. Epub 2018 Dec 17"