Enhanced catalytic reduction of 4-nitrophenol using magnetic Ni–Ag bimetal supported on reduced graphene oxide
- 1State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology Wuhan Hubei 430074 PR China
Abstract
Designing a catalyst with high activity and good recyclability for the reduction of 4-nitrophenol (4-NP) is a challenge of great significance. Herein, we report a one-step synthesis of highly effective and magnetically recyclable Ni–Ag bimetal supported on reduced graphene oxide (Ni–Ag/rGO), carried out via the co-reduction of Ag+, Ni2+, and graphene oxide (GO) using hydrazine hydrate as a reducing agent. The morphologies and structures of the prepared Ni–Ag/rGO composites were investigated using XRD, SEM, and TEM. The catalytic performance of the obtained Ni–Ag/rGO catalysts with different contents of rGO (0, 0.1, 0.5, and 1 wt%) was also studied. The results showed that the Ni–Ag/rGO catalyst with 0.5 wt% rGO exhibited higher catalytic activity, with a reaction rate constant of 0.8585 min−1, which is 3.4 times that of the catalyst without GO. The enhanced catalytic activity of the Ni–Ag/rGO catalyst with 0.5 wt% rGO can be attributed to the improved dispersity of Ni–Ag bimetallic nanoparticles (NPs) and accelerated electron transfer between the catalyst and rGO. It is noteworthy that the Ni–Ag/rGO catalyst shows superior magnetic recyclability and stability, with maintenance of more than 90% of its catalytic activity after 10 cycles of catalysis experiments, suggesting that the Ni–Ag/rGO catalyst is a resource-saving, highly effective catalyst for reducing 4-NP.
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BibTeX
@article{li2026enhanced,
title = {{Enhanced catalytic reduction of 4-nitrophenol using magnetic Ni–Ag bimetal supported on reduced graphene oxide}},
author = {Yue Li and Jiaxin Li and Fatang Tan and Wei Wang and Xueliang Qiao},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra05575c},
url = {https://europepmc.org/article/PMC/PMC13670033},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Enhanced catalytic reduction of 4-nitrophenol using magnetic Ni–Ag bimetal supported on reduced graphene oxide
AU - Yue Li
AU - Jiaxin Li
AU - Fatang Tan
AU - Wei Wang
AU - Xueliang Qiao
PY - 2026
DA - 2026/10/15
JO - RSC advances
DO - 10.1039/d6ra05575c
UR - https://europepmc.org/article/PMC/PMC13670033
AB - Designing a catalyst with high activity and good recyclability for the reduction of 4-nitrophenol (4-NP) is a challenge of great significance. Herein, we report a one-step synthesis of highly effective and magnetically recyclable Ni–Ag bimetal supported on reduced graphene oxide (Ni–Ag/rGO), carried out via the co-reduction of Ag+, Ni2+, and graphene oxide (GO) using hydrazine hydrate as a reducing agent. The morphologies and structures of the prepared Ni–Ag/rGO composites were investigated using XRD, SEM, and TEM. The catalytic performance of the obtained Ni–Ag/rGO catalysts with different contents of rGO (0, 0.1, 0.5, and 1 wt%) was also studied. The results showed that the Ni–Ag/rGO catalyst with 0.5 wt% rGO exhibited higher catalytic activity, with a reaction rate constant of 0.8585 min−1, which is 3.4 times that of the catalyst without GO. The enhanced catalytic activity of the Ni–Ag/rGO catalyst with 0.5 wt% rGO can be attributed to the improved dispersity of Ni–Ag bimetallic nanoparticles (NPs) and accelerated electron transfer between the catalyst and rGO. It is noteworthy that the Ni–Ag/rGO catalyst shows superior magnetic recyclability and stability, with maintenance of more than 90% of its catalytic activity after 10 cycles of catalysis experiments, suggesting that the Ni–Ag/rGO catalyst is a resource-saving, highly effective catalyst for reducing 4-NP.
SN - 2046-2069
ER -