石墨氮化碳
乙酰化物
材料科学
铂金
催化作用
带隙
光催化
金属
电子供体
制氢
氮化物
贵金属
异质结
光化学
化学
纳米技术
有机化学
光电子学
冶金
图层(电子)
作者
Xuan Zhou,Yurong Liu,Teruhisa Ohno,Meina Huang,Feifan Zhou,Jun Song,Junle Qu,Yu‐Jia Zeng,Peng‐Cheng Qian,Wai‐Yeung Wong
标识
DOI:10.1002/advs.202002465
摘要
Abstract A metal‐complex‐modified graphitic carbon nitride (g‐C 3 N 4 ) bulk heterostructure is presented here as a promising alternative to high‐cost noble metals as artificial photocatalysts. Theoretical and experimental studies of the spectral and physicochemical properties of three structurally similar molecules Fo–D , Pt–D , and Pt–P confirm that the Pt(II) acetylide group effectively expands the electron delocalization and adjusts the molecular orbital levels to form a relatively narrow bandgap. Using these molecules, the donor–acceptor assemblies Fo–D @ CN , Pt–D @ CN , and Pt–P @ CN are formed with g‐C 3 N 4 . Among these assemblies, the Pt(II) acetylide‐based composite materials Pt–D @ CN and Pt–P @ CN with bulk heterojunction morphologies and extremely low Pt weight ratios of 0.19% and 0.24%, respectively, exhibit the fastest charge transfer and best light‐harvesting efficiencies. Among the tested assemblies, 10 mg Pt–P @ CN without any Pt metal additives exhibits a significantly improved photocatalytic H 2 generation rate of 1.38 µmol h −1 under simulated sunlight irradiation (AM1.5G, filter), which is sixfold higher than that of the pristine g‐C 3 N 4 .
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