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Surface Roughness Effects of Pd‐loaded Magnetic Microspheres on Reduction Kinetics of Nitroaromatics
Author(s) -
An Seonghwi,
Manivannan Shanmugam,
Viji Mayavan,
Shim Min Suk,
Hwang Byeong Hee,
Kim Kyuwon
Publication year - 2021
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.12284
Subject(s) - hematite , materials science , mesoporous material , chemical engineering , catalysis , kinetics , magnetite , nanoparticle , selective catalytic reduction , nuclear chemistry , inorganic chemistry , chemistry , nanotechnology , organic chemistry , metallurgy , physics , quantum mechanics , engineering
Metal nanoparticles decoration on magnetically active semiconductor materials is a common strategy to improve the colloidal stability, catalyst harvesting, and reuse. In this study, a surfactant‐free solvothermal method followed by a heat treatment to prepare highly surface roughened α‐Fe 2 O 3 (Hematite)/Pd microspheres (MSPs) is reported. Amine‐functionalized silicate sol‐gel matrix is used as a stabilizing agent for the solvothermal synthesis of Prussian blue (PB) MSPs using HCl at 80 °C for 20 h. It is observed that modulating HCl concentration in a medium led to a high degree of improvement in surface roughness. Employing heat treatment at 350 °C for 6 h, PB MSPs are transformed into α‐Fe 2 O 3 , Hematite phase. Fabricated Hematite/Pd MSPs have shown high catalytic reduction activity over p‐nitrophenol. Reduction kinetics of nitroaromatics is monitored using UV‐vis absorption spectroscopy and product formation is confirmed by 1 H and 13 C NMR analyses.