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论文类型：期刊论文

发表时间：2019-03-18

发表刊物：SEPARATION AND PURIFICATION TECHNOLOGY

收录刊物：SCIE、Scopus

卷号：211

页面范围：782-789

ISSN号：1383-5866

关键字：g-C3N4/Ti3C2 composite; Heterojunction; Visible light; Photocatalytic capability; Ciprofloxacin degradation

摘要：Photocatalytic water treatment is an eco-friendly technique for organic pollutants degradation. In this work, a novel photocatalyst, g-C3N4/Ti3C2 (CNTC) composite, was prepared by an evaporation-induced self-assembly method. In the CNTC composite, schottky heterojunction was successfully formed between two-dimensional (2D) g-C3N4 and Ti3C2 Nano sheets, which suppressed the recombination of electron-hole pairs and provided better photo-generated charge separation and migration performance. CNTC displayed obvious red-shift to visible region with the absorption edge of 515 nm compared to g-C3N4 (450 nm). Its photocurrent was 2.2 mu A.cm(-1) under visible light irradiation, which was 2.75 times higher than that of g-C3N4. The CNTC composite exhibited enhanced photocatalytic capability for ciprofloxacin (CIP) degradation than g-C3N4. The pseudo-first-order kinetic constant of CIP decomposition on CNTC was 2.2 times greater than that of g-C3N4 under the visible-light irradiation with wavelength more than 400 nm. The active species trapping experiments indicated that h(+) and center dot O-2(-) played critical roles in this photocatalytic process.