Qi Kezhen, Cui Nan, Zhang Manjie, Ma Yuhua, Wang Guangzhao, Zhao Zhen, Khataee Alireza
Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, 110034, China; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China.
Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, 110034, China.
Chemosphere. 2021 Jun;272:129953. doi: 10.1016/j.chemosphere.2021.129953. Epub 2021 Feb 11.
This work presents a simple way to prepare boron-doped graphitic carbon nitride (B/g-CN), exhibiting an enhanced photocatalytic performance to split water for hydrogen production. B/g-CN was synthesized via the pyrolysis of urea and 1-ethyl-3-methylimidazolium tetrafluoroborate ([Emim]BF), which was adopted as the boron source. The aggregate of B/g-CN nanosheets shows a porous structure since some bubbles are generated under the heat decomposition of ionic liquids. The porous structure is conducive to the exposure of more active sites. Moreover, B-doping will form some localized electronic energy levels in the band gap of g-CN, thereby extending its visible light response. As impacted by the porous structure of B/g-CN aggregate and the narrow the band gap, the photocatalytic hydrogen generation rate (901 μmol h g) is increased, almost 3 times faster than g-CN (309 μmol h g). This work proposed a simple method to prepare the aggregate of B/g-CN nanosheets exhibiting pores under ionic liquid assistance. It can be a novel method to design porous polymer photocatalysts.
这项工作提出了一种制备硼掺杂石墨相氮化碳（B/g-CN）的简单方法，其在光催化分解水产氢方面表现出增强的性能。B/g-CN是通过尿素与作为硼源的1-乙基-3-甲基咪唑四氟硼酸盐（[Emim]BF）热解合成的。B/g-CN纳米片的聚集体呈现出多孔结构，这是因为离子液体热分解时会产生一些气泡。这种多孔结构有利于更多活性位点的暴露。此外，硼掺杂会在g-CN的带隙中形成一些局域化的电子能级，从而扩展其可见光响应。受B/g-CN聚集体的多孔结构和窄带隙的影响，光催化产氢速率（901 μmol h g）提高，几乎比g-CN（309 μmol h g）快3倍。这项工作提出了一种在离子液体辅助下制备具有孔隙的B/g-CN纳米片聚集体的简单方法。它可以成为设计多孔聚合物光催化剂的一种新方法。
