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Graphene Quantum‐Dot‐Modified Hexagonal Tubular Carbon Nitride for Visible‐Light Photocatalytic Hydrogen Evolution
ChemCatChem ( IF 3.8 ) Pub Date : 2018-02-19 , DOI: 10.1002/cctc.201701823 Yanting Gao 1, 2 , Feng Hou 2 , Shan Hu 2 , Baogang Wu 2 , Ying Wang 1, 2 , Haiqiu Zhang 2 , Baojiang Jiang 2 , Honggang Fu 2
ChemCatChem ( IF 3.8 ) Pub Date : 2018-02-19 , DOI: 10.1002/cctc.201701823 Yanting Gao 1, 2 , Feng Hou 2 , Shan Hu 2 , Baogang Wu 2 , Ying Wang 1, 2 , Haiqiu Zhang 2 , Baojiang Jiang 2 , Honggang Fu 2
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Graphene quantum dots were modified on hexagonal tubular carbon nitride to form a composite photocatalyst by freeze‐drying technology. With an optimum loading amount of 0.15 wt % GQDs, the composite photocatalyst exhibits an improved visible‐light photocatalytic performance for hydrogen evolution (112.1 μmol h−1) that is about 9 times higher than that of bulk carbon nitride. During the photocatalytic reaction, graphene quantum dots play a photosensitizer role and an electron reservoir, which can extend the visible‐light response of the photocatalyst, decrease its band gap, and improve the separation efficiency of photoinduced electron–hole pairs. The graphene quantum dots can also absorb the long‐wavelength light and then emit the shorter wavelength light based on its upper transfer luminescence properties, which also contribute to the utilization of visible light. This finding demonstrates that the graphene quantum‐dot modification is a promising method to improve visible‐light photocatalytic activities for traditional photocatalysts.
中文翻译：
石墨烯量子点修饰的六角形管状碳氮化物用于可见光光催化氢的释放
石墨烯量子点在六角形管状碳氮化物上进行了改性，通过冷冻干燥技术形成了复合光催化剂。在0.15 wt％GQDs的最佳负载量下，复合光催化剂表现出改善的可见光光催化性能，从而释放出氢气（112.1μmolh -1），是整体氮化碳的9倍左右。在光催化反应中，石墨烯量子点起着光敏剂和电子库的作用，可以扩展光催化剂的可见光响应，减小其带隙，并提高光致电子-空穴对的分离效率。石墨烯量子点还可以吸收长波长的光，然后基于其较高的传输发光特性发出较短波长的光，这也有助于可见光的利用。该发现表明，石墨烯量子点修饰是一种改善传统光催化剂可见光光催化活性的有前途的方法。
更新日期：2018-02-19
中文翻译：
石墨烯量子点修饰的六角形管状碳氮化物用于可见光光催化氢的释放
石墨烯量子点在六角形管状碳氮化物上进行了改性，通过冷冻干燥技术形成了复合光催化剂。在0.15 wt％GQDs的最佳负载量下，复合光催化剂表现出改善的可见光光催化性能，从而释放出氢气（112.1μmolh -1），是整体氮化碳的9倍左右。在光催化反应中，石墨烯量子点起着光敏剂和电子库的作用，可以扩展光催化剂的可见光响应，减小其带隙，并提高光致电子-空穴对的分离效率。石墨烯量子点还可以吸收长波长的光，然后基于其较高的传输发光特性发出较短波长的光，这也有助于可见光的利用。该发现表明，石墨烯量子点修饰是一种改善传统光催化剂可见光光催化活性的有前途的方法。
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