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ZIF‐67‐Derived 3D Hollow Mesoporous Crystalline Co 3 O 4 Wrapped by 2D g‐C 3 N 4 Nanosheets for Photocatalytic Removal of Nitric Oxide
Author(s) -
Liu Dongni,
Chen Dongyun,
Li Najun,
Xu Qingfeng,
Li Hua,
He Jinghui,
Lu Jianmei
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201902291
Subject(s) - mesoporous material , materials science , photocatalysis , annealing (glass) , graphitic carbon nitride , chemical engineering , heterojunction , nitride , nanotechnology , catalysis , layer (electronics) , chemistry , organic chemistry , composite material , optoelectronics , engineering
ZIF‐67‐derived 3D hollow mesoporous crystalline Co 3 O 4 wrapped by 2D graphitic carbon nitride (g‐C 3 N 4 ) nanosheets are prepared by low temperature annealing, and are used for the photocatalytic oxidation of nitric oxide (NO) at a concentration of 600 ppb. The p–n heterojunction between Co 3 O 4 and g‐C 3 N 4 forms a spatial conductive network frame and results in a broad visible light response range. The hollow mesoporous structure of Co 3 O 4 contributes to the circulation and adsorption of NO, and the large specific surface area exposes abundant active sites for the reaction of active species. A maximum NO degradation efficiency of 57% is achieved by adjusting the mass of the Co 3 O 4 precursor. Cycling tests and X‐ray diffraction indicate the high stability and recyclability of the composite, making it promising in environmental purification applications.