TY - JOUR
T1 - Preparation of Ag 2 O/Ag 2 CO 3 /MWNTs composite photocatalysts for enhancement of ciprofloxacin degradation
AU - Wang, Huiqin
AU - Li, Jinze
AU - Huo, Pengwei
AU - Yan, Yongsheng
AU - Guan, Qingfeng
N1 - Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/3/15
Y1 - 2016/3/15
N2 - The Ag 2 O/Ag 2 CO 3 /multi-walled carbon nanotube (MWNTs) composite photocatalysts were prepared by calcination of the obtained precipitate. The structures and morphology of as-prepared composite photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy, X-ray photoelectron spectroscopy (XPS). The Ag 2 O/Ag 2 CO 3 /MWNTs composite photocatalysts exhibit higher degradation rate of ciprofloxacin (CIP) than the pure Ag 2 CO 3 , Ag 2 O/Ag 2 CO 3 and Ag 2 CO 3 /MWNTs under visible light irradiation. The amount of loaded Ag 2 CO 3 onto MWNTs and calcined time for Ag 2 CO 3 /MWNTs were systematically investigated, and the optimal amount of loaded Ag 2 CO 3 and calcined time of Ag 2 CO 3 /MWNTs are 150 wt% and 10 min, respectively. The highest photocatalytic degradation rate of CIP could reach 76% under optimal conditions. The active species trapping experiments were also analyzed, the results show that the holes are main contributor for the degradation processes of CIP, furthermore the electrons, •O 2 - and •OH are also crucially influenced the photocatalytic degradation processes of CIP. The possible photocatalytic processes of CIP with Ag 2 O/Ag 2 CO 3 /MWNTs composite photocatalyst are also proposed.
AB - The Ag 2 O/Ag 2 CO 3 /multi-walled carbon nanotube (MWNTs) composite photocatalysts were prepared by calcination of the obtained precipitate. The structures and morphology of as-prepared composite photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy, X-ray photoelectron spectroscopy (XPS). The Ag 2 O/Ag 2 CO 3 /MWNTs composite photocatalysts exhibit higher degradation rate of ciprofloxacin (CIP) than the pure Ag 2 CO 3 , Ag 2 O/Ag 2 CO 3 and Ag 2 CO 3 /MWNTs under visible light irradiation. The amount of loaded Ag 2 CO 3 onto MWNTs and calcined time for Ag 2 CO 3 /MWNTs were systematically investigated, and the optimal amount of loaded Ag 2 CO 3 and calcined time of Ag 2 CO 3 /MWNTs are 150 wt% and 10 min, respectively. The highest photocatalytic degradation rate of CIP could reach 76% under optimal conditions. The active species trapping experiments were also analyzed, the results show that the holes are main contributor for the degradation processes of CIP, furthermore the electrons, •O 2 - and •OH are also crucially influenced the photocatalytic degradation processes of CIP. The possible photocatalytic processes of CIP with Ag 2 O/Ag 2 CO 3 /MWNTs composite photocatalyst are also proposed.
KW - Ag O/Ag CO
KW - CIP
KW - MWNTs
KW - Photocatalytic degradation
KW - Synergistic effect
UR - https://www.scopus.com/pages/publications/84960117343
U2 - 10.1016/j.apsusc.2015.12.229
DO - 10.1016/j.apsusc.2015.12.229
M3 - 文章
AN - SCOPUS:84960117343
SN - 0169-4332
VL - 366
SP - 1
EP - 8
JO - Applied Surface Science
JF - Applied Surface Science
ER -