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3D Hierarchical N, O Co–Doped MoS 2 /NiO Hollow Microspheres as Reusable Catalyst for Nitrophenols Reduction
Author(s) -
Chen Qiushuang,
Li Yang,
Li Qiuhao,
Jia Yanlin,
Qiao Xiuqing
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901851
Subject(s) - non blocking i/o , catalysis , materials science , noble metal , microsphere , chemical engineering , amorphous solid , 4 nitrophenol , hydrothermal circulation , nitrophenol , metal , nanotechnology , nuclear chemistry , nanoparticle , chemistry , metallurgy , organic chemistry , engineering
The exploitation of efficient noble metal free catalyst for nitrophenols is of great importance. Herein, 3D hierarchical N, O‐MoS 2 /NiO hollow microspheres have been successfully prepared via a facile hydrothermal method. Characterizations reveal that the as‐obtained hollow microspheres were assembled by amorphous N, O co‐doped MoS 2 and NiO nanosheets. Catalytic experiments show that the hollow microspheres displayed remarkably enhanced catalytic activity for 2, 3, 4‐nitrophenol reduction with the k app reaching 1.72 min −1 for 4‐nitrophenol, among the best reported non‐noble metal catalysts. The greatly enhanced catalytic activity is attributed to the synergistic effects of abundant exposed catalytic edge sites, intimate P−N heterojunction between NiO and N, O‐MoS 2 , as well as the hollow porous structure. Moreover, the recovered N, O‐MoS 2 /NiO hollow microspheres can be reused in successive 8 cycles without much losing its activity. These results suggest that the novel N, O‐MoS 2 /NiO hollow microspheres had significant application potential for wastewater treatment.