Open AccessSynthesis of hierarchical porous ZnO/Ag microspheres with enhanced photocatalytic activity
Author(s) -
Cai Honglan,
Qiao Qingan,
Guo Zhenliao,
Sun Lixiang,
Ren Shuhua,
Zhu Dongdong,
Yin Ping
Publication year - 2020
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2020.0231
Subject(s) - photocatalysis , microsphere , porosity , materials science , chemical engineering , zinc , nanotechnology , chemistry , metallurgy , catalysis , composite material , organic chemistry , engineering
Hierarchical porous zinc oxide (ZnO)/silver (Ag) microspheres were prepared by two‐step method. The porous ZnO microspheres were prepared firstly, and then Ag nanoparticles were evenly anchored on the surface of ZnO microspheres by Sn 2+ activation method. The results show that ZnO is wurtzite phase, and Ag particles are only coated on the surface of ZnO microspheres. Compared with pure ZnO, there are two obvious absorption peaks of Ag‐doped ZnO, which corresponds to the ultraviolet absorption peak of ZnO and the plasma resonance absorption peak of Ag, respectively. The intensities of photoluminescence peak of ZnO/Ag microspheres are significantly lower than that of pure ZnO. Moreover, ZnO/Ag microspheres show higher photocatalytic activity than ZnO, which may be attributed to the existence of highly dispersed Ag.