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Facile Synthesis of Ag NPs Decorated CuO/Cu 2 O Composite Nanoparticles for Enhancing Catalytic Activity in the Hydrogenation of 4‐ Nitrophenol
Author(s) -
Zhang Nannan,
Xie Ruyan,
Song Wanyu,
Zhang Fang,
Chen Lihua,
Chai Fang
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202100815
Subject(s) - catalysis , materials science , nanoparticle , noble metal , scanning electron microscope , composite number , transmission electron microscopy , chemical engineering , metal , transition metal , copper , 4 nitrophenol , nuclear chemistry , nanotechnology , metallurgy , chemistry , composite material , organic chemistry , engineering
The catalytic hydrogenation of 4‐Nitrophenol (4‐NP) can transfer serious toxic 4‐NP to invaluable industrial raw materials 4‐aminophenol (4‐AP) in the presence of NaBH 4 , which prevents industrial and agricultural wastewater affecting the health of living beings. It is crucial and meaningful to design cost‐effective catalysts as alternate to cut down the dependence on precious metals catalysts in the reduction of 4‐NP. Metal/semiconductor composites can be endowed promising cost‐effective substitution to catalyticly reduce 4‐NP. Herein, CuO/Cu 2 O−Ag composite nanoparticles (CNPs) were prepared based on the CuO/Cu 2 O nanocubes by a step method. The morphology and components of the CuO/Cu 2 O−Ag CNPs were characterized by X‐ray diffraction (XRD), scanning electronic microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive X‐ray spectroscopy (EDX) respectively. CuO/Cu 2 O−Ag CNPs displayed high catalytic activity in the hydrogenation of 4‐NP with pseudo‐first‐order rate constant of 1.5×10 −2 s −1 . Notably, a high turnover frequency of 6.44×10 −2 s −1 was obtained, which expressed much higher than some noble‐metal catalysts. Also, CuO/Cu 2 O−Ag CNPs exhibited outstanding sustainable catalytic performance, as no distinct activity slump was perceived in continuous 10 cycles with conversion rate exceed 95 %, endowed it potential utility in industrialization.