TY - JOUR
T1 - Novel Ag-Cu bimetallic alloy decorated near-infrared responsive three-dimensional rod-like architectures for efficient photocatalytic water purification
AU - Zhang, Yuanyuan
AU - Wang, Lili
AU - Kong, Xiaoying
AU - Jiang, Haiyan
AU - Zhang, Fan
AU - Shi, Jinsheng
N1 - Publisher Copyright:
© 2018 Elsevier Inc.
PY - 2018/7/15
Y1 - 2018/7/15
N2 - In this paper, novel silver-copper bimetallic alloy (Ag-Cu) nanoparticles (NPs) decorated β-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 H2 reduction process for the first time. In NYFT@Ag-Cu composite, efficient energy transfer from β-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.
AB - In this paper, novel silver-copper bimetallic alloy (Ag-Cu) nanoparticles (NPs) decorated β-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 H2 reduction process for the first time. In NYFT@Ag-Cu composite, efficient energy transfer from β-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.
KW - 3D micro-rods
KW - Ag-Cu bimetallic alloy
KW - NIR-response
KW - Photocatalytic water purification
UR - https://www.scopus.com/pages/publications/85044131623
U2 - 10.1016/j.jcis.2018.02.005
DO - 10.1016/j.jcis.2018.02.005
M3 - 文章
C2 - 29574266
AN - SCOPUS:85044131623
SN - 0021-9797
VL - 522
SP - 29
EP - 39
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -