期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 522, 期 -, 页码 29-39出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.02.005
关键词
3D micro-rods; Ag-Cu bimetallic alloy; NIR-response; Photocatalytic water purification
资金
- Doctoral Foundation of Natural Science Foundation of Shandong Province [ZR2017BEM013]
- Primary Research & Development Plan of Shandong Province [2017GNC13110]
In this paper, novel silver-copper bimetallic alloy (Ag-Cu) nanoparticles (NPs) decorated beta-NaYF4: Yb3+, Tm3+@TiO2 (@ means TiO2 supported on NaYF4: Yb3+, Tm3+, marked as NYFT) micro-rods were successfully synthesized through a surfactant-assistant sol-gel method and H-2 reduction process for the first time. In NYFT@Ag-Cu composite, efficient energy transfer from beta-NaYF4: Yb3+, Tm3+ (NYF) to TiO2 and metal NPs was confirmed. Under near-infrared (NIR) light irradiation, Ag-Cu alloy supported NYFT exhibited significantly enhanced photocatalytic activity in comparison with other samples, and water disinfection involving 100% inactivation of bacteria was realized within 8 h. The strengthened photocatalytic activity was assigned to the synergistic effect of up-conversion (UC) material and alloy NPs. Some reasons for the improved photocatalytic activity were systematically investigated and a probable mechanism for NIR-responsive photocatalysis was elucidated. (C) 2018 Elsevier Inc. All rights reserved.
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