期刊
CHEMICAL ENGINEERING JOURNAL
卷 349, 期 -, 页码 748-755出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.05.148
关键词
Ti3C2Tx MXene; Heterostructure; Photocatalytic degradation; {001} Facets
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2018R1A6A1A03024962, NRF-2016R1A2B4010431]
- National Research Foundation of Korea [2016R1A2B4010431, 2018R1A6A1A03024962] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A simple hydrothermal treatment process was used for the fabrication of a Ti3C2Tx (MXene) nanosheet-based hybrid photocatalyst. The chemical composition of the MXene and its derivatives (nanosize {0 0 1} facets of TiO2 in Ti3C2Tx (001-T/MX)), as well as the structural properties and morphology of the as-prepared photocatalyst, were well characterised. The heterostructure of the as-prepared photocatalyst was obtained by controlled oxidation action via the Schottky junction formed between TiO2-MXene interfaces. The adsorption/photocatalytic degradation abilities of the pristine MXene and the as-synthesised 001-T/MX nanocomposite for carbamazepine (CBZ) were investigated. The determined K-app value of CBZ under ultraviolet light was 0.0304 min(-1), higher than that under natural solar light, and the degradation capacity was strongly controlled under acidic conditions (pH 3.0-5.0). During the photocatalytic degradation, (OH)-O-center dot and O-center dot(2) attacked the CBZ molecule; detailed degradation pathways were proposed accordingly. The novel heterojunction 001-T/MX exhibited excellent applicability for CBZ decomposition.
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