Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co3O4 Catalyst and Its Catalytic Performance for Benzene Oxidation. Issue 4 (4th February 2019)

• Record Type: Journal Article
• Authors: Ma, Xiuyun; Yu, Xiaolin; Yang, Xueqin; Lin, Mengya; Ge, Maofa
• Is Part Of: ChemCatChem. Volume 11:Issue 4(2019)
• Page Start: 1214
• Page End: 1221
• Publication Date: 2019-02-04
• Subjects: benzene removal -- catalytic oxidation -- Co3O4 -- double-sided nanobrush structure -- hydrothermal synthesis; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201801539
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: A double‐sided nanobrush Co3 O4 (Co3 O4 −B) catalyst was successfully prepared by a hydrothermal method for the first time, and Co3 O4 rods (Co3 O4 −R), Co3 O4 hexagonal plates (Co3 O4 −H) and Co3 O4 double‐sided helianthus discs (Co3 O4 −D) were also synthesized through tuning the water/ethanol ratio. Among all of the as‐prepared catalysts, the Co3 O4 −B catalyst exhibited the best catalytic activity for benzene oxidation. The excellent catalytic performance could be attributed to the surface abundance Co 3+ species, good low‐temperature reducibility and high number of lattice defects with substantial active oxygen species, which resulted from the unique structure of the double‐sided nanobrush. The stability and water tolerance tests demonstrated that the Co3 O4 −B catalyst displays excellent stability for benzene combustion, and the deactivation caused by water vapor is also reversible. It is concluded that the unique structure of the catalysts plays a crucial role in determining its catalytic oxidation performance. Abstract : Brushing away ! A novel double‐sided nanobrush Co3 O4 catalyst (Co3 O4 −B) was synthesized by a hydrothermal method and used for the degradation of gaseous benzene. Numerous analytical techniques confirmed that the Co3 O4 −B catalyst displays a highly defective structure and a high amount of surface Co 3+, which results from the special double‐sided nanobrush structure. In addition, the Co3 O4 −B catalyst displays excellent catalytic performance and stability for benzene oxidation.