Premium
Fabrication of Oxygen‐Doped Double‐Shelled GaN Hollow Spheres toward Efficient Photoreduction of CO 2
Author(s) -
Zhang Yuan,
Zhou Yong,
Tang Lanqin,
Wang Meng,
Li Ping,
Tu Wenguang,
Liu Junming,
Zou Zhigang
Publication year - 2016
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201500235
Subject(s) - photocatalysis , spheres , materials science , doping , visible spectrum , absorption (acoustics) , fabrication , oxygen , band gap , trapping , ammonia , nanotechnology , chemical engineering , photochemistry , optoelectronics , chemistry , catalysis , composite material , medicine , ecology , biochemistry , physics , alternative medicine , organic chemistry , pathology , astronomy , engineering , biology
Double‐shelled GaN hollow spheres are prepared for photocatalytic reduction of CO 2 through ammonia‐gas nitridation of shape‐analogous Ga 2 O 3 hollow spheres. Small amount oxygen in situ doping narrows the bandgap of the GaN hollow sphere which significantly enhances the utilization of visible light. The large surface area of the hollow spheres provides more activity sites for the photoreduction reaction. The specific hollow structure also allows the trapping of the incident light for a longer time during photocatalysis process, which provides more opportunities for light absorption. Loading of Pt and RuO 2 cocatalysts further enhances the separation of photogenerated electrons and holes to improve the CO 2 reduction activity.