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Fast and Long-Lasting Iron(III) Reduction by Boron Toward Green and Accelerated Fenton Chemistry |
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| Authors: | Peng Zhou Wei Ren Gang Nie Xiaojie Li Dr Xiaoguang Duan Yongli Zhang Prof Shaobin Wang |
| Institution: | 1. School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA, 5005 Australia
College of Architecture & Environment, Sichuan University, Chengdu, 610065 China;2. School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA, 5005 Australia;3. College of Architecture & Environment, Sichuan University, Chengdu, 610065 China |
| Abstract: | Generation of hydroxyl radicals in the Fenton system (FeII/H2O2) is seriously limited by the sluggish kinetics of FeIII reduction and fast FeIII precipitation. Here, boron crystals (C-Boron) remarkably accelerate the FeIII/FeII circulation in Fenton-like systems (C-Boron/FeIII/H2O2) to produce a myriad of hydroxyl radicals with excellent efficiencies in oxidative degradation of various pollutants. The surface B−B bonds and interfacial suboxide boron in the surface B12 icosahedra are the active sites to donate electrons to promote fast FeIII reduction to FeII and further enhance hydroxyl radical production via Fenton chemistry. The C-Boron/FeIII/H2O2 system outperforms the benchmark Fenton (FeII/H2O2) and FeIII-based sulfate radical systems. The reactivity and stability of crystalline boron is much higher than the popular molecular reducing agents, nanocarbons, and other metal/metal-free nanomaterials. |
| Keywords: | boron catalytic oxidation Fenton-like systems hydroxyl radicals metal-free catalysis |