Enhanced Charge Separation Efficiency Accelerates Hydrogen Evolution from Water of Carbon Nitride and 3,4,9,10-Perylene-tetracarboxylic Dianhydride Composite Photocatalyst,ACS Applied Materials & Interfaces

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Enhanced Charge Separation Efficiency Accelerates Hydrogen Evolution from Water of Carbon Nitride and 3,4,9,10-Perylene-tetracarboxylic Dianhydride Composite Photocatalyst
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-01-22 00:00:00 , DOI: 10.1021/acsami.7b14896
Chen Ye ₁ , Jia-Xin Li ₁ , Hao-Lin Wu ₁ , Xu-Bing Li ₁ , Bin Chen ₁ , Chen-Ho Tung ₁ , Li-Zhu Wu ₁

Affiliation

The catalytic ability of graphitic carbon nitride is greatly affected by its intrinsic electronic properties. Although combination with chromophore has been demonstrated to be one of the promising approaches to improve the catalytic performance of carbon nitride, it is imperative to understand the key factors governing the whole process. Here, we report a composite photocatalyst CN–P by embedding perylene unit into the matrix of carbon nitride. The composite photocatalyst could catalyze hydrogen evolution with a high rate of 17.7 mmol h^–1 g^–1, which is 2.8 times faster than pure carbon nitride. The apparent quantum efficiency is high up to be 5.8% at 450 nm. Detailed studies reveal that the light absorption ability and charge separation efficiency are greatly enhanced in the synthesized catalyst. These are the key factors for the improved hydrogen evolution ability of CN–P than that of pure carbon nitride.

中文翻译：

增强的电荷分离效率促进了碳氮化物和3,4,9,10-Per-四羧酸二酐复合光催化剂从水中的析氢

石墨氮化碳的催化能力受其固有的电子性能极大地影响。尽管已证明与发色团结合是改善氮化碳催化性能的一种有前途的方法，但必须了解控制整个过程的关键因素。在这里，我们通过将per单元嵌入氮化碳基质中来报告复合光催化剂CN-P。复合光催化剂可以以17.7 mmol h ^–1 g ^–1的高速率催化氢的释放。，比纯氮化碳快2.8倍。表观量子效率很高，在450 nm时高达5.8％。详细的研究表明，合成催化剂大大提高了光吸收能力和电荷分离效率。这些是与纯氮化碳相比提高CN-P析氢能力的关键因素。

更新日期：2018-01-22

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