光催化
异质结
X射线光电子能谱
材料科学
制氢
可见光谱
光致发光
甲醛
水溶液
光化学
带隙
化学工程
氢
催化作用
光电子学
化学
物理化学
有机化学
工程类
作者
Ling Feng,Okonkwo Chika Anthony,Qiong Xiong,Mingping Luo,Xiaojun Pan,Lishan Jia,Jiale Huang,Daohua Sun,Qingbiao Li
标识
DOI:10.1016/j.ijhydene.2015.10.036
摘要
PdO/LaCoO3 heterojunction photocatalyst was prepared by sol gel process and deposition precipitation method under mild condition, used for H2 production from formaldehyde aqueous solution without any additives at low temperature. We demonstrate through PdO doping that creation of heterojunction on LaCoO3 particles surface can effectively adjust band-gap and Fermi energy levels to apply in hydrogen production from formaldehyde solution under visible light. The work indicate that the heterojunction structure can greatly enhance the charge generation, largely improve the visible light absorptive quality and effectively restrain the recombination of photogenerated electron–holes pairs to exhibit a higher photocatalytic activity. The optimal photocatalytic activity of PdO/LaCoO3 in H2 production from formaldehyde solution under visible light was ten times of LaCoO3 (1.26 mmol h−1 g−1). The photocatalysts composition and optical properties were characterized by XRD, TEM, EDS, XPS, TPR-H2, UV–vis (DRS) and Photoluminescence (PL).
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