光降解
盐酸四环素
电子顺磁共振
激进的
降级(电信)
光化学
四环素
质谱法
反应速率常数
化学
剥脱关节
化学工程
材料科学
动力学
色谱法
纳米技术
有机化学
生物化学
核磁共振
抗生素
光催化
计算机科学
催化作用
石墨烯
工程类
物理
电信
量子力学
作者
Madina Telkhozhayeva,Baruch Hirsch,Rajashree Konar,Eti Teblum,Ronit Lavi,Michal Weitman,Bibhudatta Malik,Elisa Moretti,Gilbert Daniel Nessim
标识
DOI:10.1016/j.apcatb.2022.121872
摘要
Here, we report a simple route of synthesizing bulk layered TiS2 via chemical vapor transport (CVT) using non-toxic inorganic precursors, followed by successful isolation of few-layered TiS2 flakes using high-frequency-based liquid-phase exfoliation. Exfoliated TiS2 flakes exhibit significantly enhanced photocatalytic activity towards the degradation of tetracycline hydrochloride (TCH) under simulated solar light irradiation, achieving ~ 95% degradation efficiency with its reaction rate constants six times higher than that of the bulk counterpart. The underlying degradation mechanism can be attributed to the fully exposed reactive sites originating from the well-defined layered structure. Trapping experiments coupled with electron paramagnetic resonance (EPR) measurements confirm the generation of electrons and hydroxyl radicals as major active species. The photodegradation pathway and intermediates of TCH were studied in-depth through liquid chromatography-mass spectrometry (LC-MS). The current work provides new insight into using exfoliated TiS2 for environmental remediation.
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