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Controlled Synthesis of Higher Interfacial Electron Transfer Graphite‐Like Carbon Nitride/Perylenetetracarboxylic Diimide Heterogeneous for Enhanced Photocatalytic Activity
Solar RRL ( IF 7.9 ) Pub Date : 2020-09-24 , DOI: 10.1002/solr.202000453
Hong Miao 1 , Jun Yang 1 , Yuqiang Sheng 1 , Wenlu Li 1 , Yongfa Zhu 1
Affiliation  

To exploit the noble‐metal‐free, highly efficient and broad‐spectrum responsive photocatalyst of perylenetetracarboxylic diimide (PDI), a self‐assembled PDI nanowire is loaded on the surface of a graphite‐like carbon nitride (g‐C3N4) nanosheet and forms an all‐organic supramolecular 1D/2D heterogeneous g‐C3N4/PDI with broad‐spectrum responsiveness (254–700 nm), which can improve the absorption efficiency of solar energy. In the g‐C3N4/PDI system, the π–π conjugated bond in the g‐C3N4/PDI can accelerate the photoinduced charge carrier transfer. On the other hand, the interlaced band structure between the g‐C3N4 and PDI and the Z‐scheme pathway of the carriers leads to the spatial separation of redox reaction sites. Therefore, the g‐C3N4/PDI photocatalyst reaches strong redox ability in the photocatalytic process. In detail, the photocatalytic phenol degradation of g‐C3N4/PDI (0.837 h−1) is enhanced 2.67 and 9.19 times higher as the pure PDI and g‐C3N4, respectively, under the full spectra. Meanwhile, the H2 evolution activity of the g‐C3N4/PDI (1649.93 μmol g−1 h−1) is 2.03 times higher than g‐C3N4 nanosheet (814.03 μmol g−1 h−1).

中文翻译:

高界面电子转移石墨状碳氮化物/ tetra四甲酸二亚胺的非均相控制合成以提高光催化活性

为了开发per四羧酸二亚胺(PDI)的无贵金属,高效且广谱响应的光催化剂,将自组装PDI纳米线负载在类石墨氮化碳(g‐C 3 N 4)的表面上纳米片并形成具有广谱响应性(254-700 nm)的全有机超分子1D / 2D异质g-C 3 N 4 / PDI,可以提高太阳能的吸收效率。在G-C 3 Ñ 4 / PDI系统中,在G-C的π-π共轭键3 Ñ 4 / PDI可加速光诱导电荷载体传输。另一方面,g‐C 3之间的交错带结构N 4和PDI以及载体的Z型路径导致了氧化还原反应位点的空间分离。因此,g‐C 3 N 4 / PDI光催化剂在光催化过程中具有很强的氧化还原能力。详细地讲,在全光谱下,g-C 3 N 4 / PDI(0.837 h -1)的光催化苯酚降解分别比纯PDI和g-C 3 N 4高2.67和9.19倍。同时,g‐C 3 N 4 / PDI(1649.93μmolg -1  h -1)的H 2析出活性是g‐C的2.03倍3 N 4纳米片(814.03μmolg -1  h -1)。
更新日期:2020-09-24
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