光催化
吸附
钯
催化作用
价(化学)
化学
氧化磷酸化
降级(电信)
光化学
有机化学
生物化学
计算机科学
电信
作者
Fa Guo,Hao Zhang,Hui Li,Zhurui Shen
标识
DOI:10.1016/j.apcatb.2022.121092
摘要
Nano-structured metal cocatalysts are easy to be oxidized and form mixed valences and interfaces which would facilitate the catalytic performance in previous studies. Herein, as an example in photocatalysis, three kinds of Pd cocatalysts with various valence distributions (PdO70-Pd30/CN, PdO50-Pd50/CN and PdO30-Pd70/CN) were loaded on g-C3N4 nanosheets with the close loading amounts (~1 wt%) and uniform sizes (2–3 nm). Then, the results of the photocatalytic degradation of ciprofloxacin showed that the generated oxidative active species are highly related to the distribution of palladium valence. Pd2+ (PdO) benefits the production of·O2-, while Pd0 benefits the production of h+. The theoretical simulations revealed that surface states e.g., electron distribution and the adsorption ability of O2 on different Pd species determined the production of·O2- and h+. Besides, PdO50-Pd50/CN showed the best performance for degrading ciprofloxacin, due to the joint action of·O2- and h+ in the CIP degradation.
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