Synthesis of Rice-Husk-Carbon-Supported Nickel Ferrite Catalyst for Reduction of Nitrophenols.

Author(s) Han, F.; Xu, X.; Fu, Y.; Wang, X.
Journal J Nanosci Nanotechnol
Date Published 2019 Sep 01
Abstract

In this paper, magnetic NiFe₂O₄-RHC (rice husk carbon) catalysts with different NiFe₂O₄ contents are prepared through a one-step hydrothermal method and employed as a catalyst for the reduction of nitrophenols. The resulting catalysts are characterized using various techniques. It is indicated that the NiFe₂O₄ nanoparticles are well dispersed on the RHC with the average size of 9.97 nm and 224.13 m²·g BET surface area. NiFe₂O₄-RHC (0.75) has the highest activity for the reduction of nitrophenols (k = 0°8872 min). The combination of NiFe₂O₄ nanoparticles with RHC results in a dramatic conversion of the inert NiFe₂O₄ into a highly active catalyst for the reduction of nitrophenols at 25 °C employing NaBH4 as the reducing agent in aqueous medium. The excellent catalytic performance of NiFe₂O₄-RHC (0.75) may be attributed to the specific characteristics of the nanostructure and the synergistic effect between NiFe₂O₄ and RHC. The effect of the substituent and temperature are also investigated. The activation energy was reduced to 15.342 kJ mol, facilitating the reaction at lower temperature. Furthermore, the catalyst NiFe₂O₄-RHC (0.75) is very cheap when RHC is introduced as the support compared to other carbon materials. The catalyst also exhibits magnetic performance and good stability; it can be used for 10 successive experiments with a conversion of 96%.

DOI 10.1166/jnn.2019.16567
ISSN 1533-4880
Citation Han F, Xu X, Fu Y, Wang X. Synthesis of Rice-Husk-Carbon-Supported Nickel Ferrite Catalyst for Reduction of Nitrophenols. J Nanosci Nanotechnol. 2019;19(9):5838-5846.

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