Sonophotocatalytic degradation of bisphenol A and its intermediates with graphitic carbon nitride

Title
Sonophotocatalytic degradation of bisphenol A and its intermediates with graphitic carbon nitride
Authors
나인욱Sharmini SunaseeKah Hon LeongKien Tiek WongGooyong LeeSaravanan PichiahByong-Hun JeonYeomin YoonMin Jang
Keywords
Sonophotocatalysis; Bisphenol A; Graphitic carbon nitride; Ultrasound; Visible light; Intermediates
Issue Date
2017-03
Publisher
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Citation
-12
Abstract
Since bisphenol A (BPA) exhibits endocrine disrupting action and high toxicity in aqueous system, there are high demands to remove it completely. In this study, the BPA removal by sonophotocatalysis coupled with nanostructured graphitic carbon nitride (g-C3N4, GCN) was conducted with various batch tests using energy-based advanced oxidation process (AOP) based on ultrasound (US) and visible light (Vis-L). Results of batch tests indicated that GCN-based sonophotocatalysis (Vis-L/US) had higher rate constants than other AOPs and especially two times higher degradation rate than TiO2-based Vis-L/US. This result infers that GCN is effective in the catalytic activity in Vis-L/US since its surface can be activated by Vis-L to transport electrons from valence band (VB) for utilizing holes (h+ VB) in the removal of BPA. In addition, US irradiation exfoliated the GCN effectively. The formation of BPA intermediates was investigated in detail by using high-performance liquid chromatography-mass spectrometry (HPLC/MS). The possible degradation pathway of BPA was proposed.
URI
http://pubs.kist.re.kr/handle/201004/66350
ISSN
0944-1344
Appears in Collections:
KIST Publication > Article
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