Preparation of magnetically separable and low-cost MC-FePd3NPs with enhanced catalytic activity in the reduction of p-nitrophenol

Yuxing Liu; Guozhen Wang; Wangrui Ma; Ningning Feng; Jiaxin Tong; Xinke Kang; Tao Hu; Haiyan Wu; Quan Yang; Jianping Xie

doi:10.1088/1361-6528/aceafd

Preparation of magnetically separable and low-cost MC-FePd₃NPs with enhanced catalytic activity in the reduction of p-nitrophenol

Nanotechnology. 2023 Aug 29;34(46). doi: 10.1088/1361-6528/aceafd.

Authors

Yuxing Liu^{1

2}, Guozhen Wang^{1

2}, Wangrui Ma³, Ningning Feng^{1

2}, Jiaxin Tong^{1

2}, Xinke Kang^{1

2}, Tao Hu^{1

2}, Haiyan Wu^{1

2}, Quan Yang³, Jianping Xie^{1

2}

Affiliations

¹ School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China.
² Key Laboratory of Biometallurgy of Ministry of Education, Changsha 410083, People's Republic of China.
³ Sino-Platinum Metals Resources (Yimen) Co., Ltd, Yuxi 651100, Yunnan, People's Republic of China.

PMID: 37499636
DOI: 10.1088/1361-6528/aceafd

Abstract

To obtain a magnetically separable, low-cost and highly efficient reduction catalyst, microbial carbon-loaded bimetallic palladium/iron nanoparticles (MC-FePd₃NPs) were synthesized in this study by using waste yeast residue doped with iron during the preparation process of microbial carbon-loaded monometallic palladium nanoparticles (MC-Pd NPs). The morphology, crystal structure, magnetic properties and catalytic performance of MC-FePd₃NPs for the reduction ofp-nitrophenol (p-NP) were investigated by various characterization techniques, such as SEM-EDS, TEM, XRD, PPMS-9 and UV-vis spectroscopy. The catalytic experiments showed that the MC-FePd₃NPs prepared under pyrolysis conditions at 700 °C had an apparent rate constant of 1.85 × 10^-1s^-1which is better than the rate constants of MC-Pd NPs and other palladium-based nanocatalytic materials reported so far. The amount of palladium used in the synthesis of MC-FePd₃NPs was half that of MC-Pd NPs. The catalyst exhibited soft magnetic ordering behavior and still showed a catalytic efficiency of 97.4% after five consecutive reaction cycles. Furthermore, employing MC-FePd₃NPs reduces the costs of catalyst preparation and use in production. MC-FePd₃NPs with efficient catalytic properties, facile magnetic separation and recyclability, and low costs of preparation and use have considerable potential for industrial applications.

Keywords: catalysis reduction; magnetic separation; microbial carbon-loaded bimetallic palladium/iron nanoparticles; microbial carbon-loaded monometallic palladium nanoparticles; recycling.