Combining iodic acid and nitric acid to fabricate carbon nitride tubes for enhanced hydrogen evolution under visible light†,Catalysis Science & Technology

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Combining iodic acid and nitric acid to fabricate carbon nitride tubes for enhanced hydrogen evolution under visible light†
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-12-04 00:00:00 , DOI: 10.1039/c8cy02006j
Guifang Ge _{1,

2,

3,

4,

5} , Zhongkui Zhao _{1,

2,

3,

4,

5}

Affiliation

This work presents a facile approach for preparing porous graphitic carbon nitride tubes with cyano groups and carbon vacancies (I/N-CN) through thermal polymerization of the pre-assembled melamine–cyanuric acid supramolecules from melamine by a mixed iodic acid/nitric acid assisted hydrothermal process. I/N-CN demonstrates 3.64-fold higher visible-light-driven hydrogen evolution rate (9.75 μmol h⁻¹) than the traditional tubular carbon nitride (HCN) prepared without iodic acid or nitric acid, originating from the promoted light absorption extending to the near-infrared region, accelerated electron transfer, inhibited recombination of charge carriers, higher reduction capability, more accessible active sites from the combination of porous tubular structure and enriched cyano groups and carbon vacancies.

中文翻译：

结合碘酸和硝酸以制造氮化碳管，以增强可见光下的氢逸出†

这项工作提出了一种容易的方法，通过混合碘酸/硝酸辅助的三聚氰胺对预组装的三聚氰胺-氰尿酸超分子进行热聚合，可以制备具有氰基和碳空位（I / N-CN）的多孔石墨碳氮化碳管。水热过程。I / N-CN的可见光驱动氢释放速率（9.75μmolh ^-1）比不含碘或硝酸的传统管状碳氮化物（HCN）高3.64倍，这归因于光吸收的扩展至近红外区域，加速的电子传输，抑制了载流子的重组，更高的还原能力，多孔管状结构与富集的氰基和碳空位的结合，使活性位点更易接近。

更新日期：2018-12-04

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