Enhanced Photocatalytic Removal of Tetrabromobisphenol A by Magnetic CoO@graphene Nanocomposites under Visible-Light Irradiation
Source abstract
Abstract
A modified, facile, and ultrasonic-assisted approach was developed to synthesize CoO@graphene nanocomposites. The chemical, electronic, and structural characteristics of CoO nanoparticles grown on graphene nanosheets were investigated by scanning transmission X-ray microscopy through spatially resolved X-ray absorption near edge structure spectroscopy and other techniques. Enhanced octahedral Co2+ (Oh) structures of CoO nanoparticles were successfully loaded on the surface of graphene nanosheets, and the photocurrent of CoO@graphene nanocomposites was 10.6 times higher than that of CoO nanoparticles. The removal efficiency of recyclable magnetic CoO@graphene nanocomposites reached up to 73.4% for tetrabromobisphenol A (TBBPA) degradation under visible-light irradiation. Free radical trapping experiments revealed that ·OH radicals were the photogenerated radical species driving the high catalytic activity. Moreover, β scission and debromination are suggested as two possible pathways of TBBPA degradation under visible light. CoO@graphene nanocomposites maintained high photocatalytic activity after reuse over four cycles, which suggests that the synthesized materials have a promising application for TBBPA removal from wastewater.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Graphene research and applications · Graphene and Nanomaterials Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, P. R. China
Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P. R. China
Shanghai Key Lab of Chemical Assessment and Sustainability, Department of Chemistry, Tongji University, Shanghai 200092, P. R. China
Shanghai East Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai 200443, P. R. China
Funding
Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China
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