Open AccessPhotoelectric properties of three‐dimensional urchin‐like zinc oxide/titanium dioxide composite micronanostructures
Author(s) -
Zhou Yi,
Yang Luyue,
Lu Jun,
Wu Yiwei,
Li Chaocheng,
Liu Yuhuan,
Li Mengyao
Publication year - 2016
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.2015.0394
Subject(s) - zinc , titanium dioxide , composite number , photoelectric effect , sea urchin , materials science , chemical engineering , chemistry , composite material , metallurgy , optoelectronics , biology , ecology , engineering
Three‐dimensional (3D) urchin‐like zinc oxide (ZnO)/titanium dioxide (TiO 2 ) composite micronanostructures were first successfully synthesised using a facile electrochemical deposition method by depositing TiO 2 into the surface of as‐prepared 3D urchin‐like ZnO, and polydienes dimethylammonium chloride as polycation solution. Photoelectric properties of the single 3D urchin‐like ZnO and the composite micronanostructures as dye‐sensitised solar cell (DSSC) anodes were investigated. During the deposition reaction, the TiO 2 was exactly densely anchored onto the surface of 3D urchin‐like ZnO with uniform size, which were characterised by scanning electron microscopy, X‐ray diffraction, and energy dispersive X‐ray spectroscopy. The effects of different molar ratios of TiO 2 and ZnO for the composite structure's morphology and photocatalytic activity were investigated systematically. The results indicated that the composite micronanostructures exhibited a larger adsorption range (−450 nm) and higher photoelectric conversion efficiency due to the synergistic effects, planar heterojunction, and mesoporous structure. When used as photoanodes for DSSCs, the I–V curve showed the photoelectric conversion efficiency of the novel composite was increased by 17.7% of that compared with the single 3D urchin‐like ZnO. These features collectively demonstrated the composite has a considerable potential for various applications in photocatalysis materials.