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| 1 | Photocatalytic Hydrogen Evolution Performance for Hydroxyl-rich Porous Carbon Nitride显示文摘Metal-free photocatalyst C3N4 has been well investigated,while how to create hydroxyl-rich porous C3N4 remains a great challenge.Herein,we report a facile approach to address this issue by developing a novel two-step process:(i)precursor achieved via freeze-drying the mixture o f urea,thiourea and NH4CI;(ii)subsequent thermal polydensation o f the precursor.Systematic sample characterization demonstrated the formation o f C3N4 featured by unique hydroxyl-rich porous structure with an extended tri-s-triazine unit.When applied as photocatalyst for water splitting under UV-Vis light irradiation,the sample displays a high hydrogen evolution rate o f 243.4μmol·g^-1·h^-1about 4 times higher than that o f C3N4 prepared by conventional method.Such a performance enhancement could be due to the porous structure and surface hydroxyl-rich functional groups that promote multiple-times reflection and light absorption,increase the active site numbers,and improve carrier transfer/separation efficiency. | WANG Yan LI Liping LI Guangshe | 2020 | Chemical Research in Chinese Universities2020，36，6： | 0 |
| 2 | Cd_(0.5)Zn_(0.5)S/N-g-C_(3)N_(4)复合催化剂的制备及其可见光催化性能的研究显示文摘采用两步水热法制备了分散性较好的镉锌硫基/氮掺杂氮化碳(Cd_(0.5)Zn_(0.5)S/N-g-C_(3)N_(4))复合催化剂。利用扫描电子显微镜、透射电子显微镜、X射线光电子能谱和X射线衍射仪对所制备的催化剂微观形貌和结构进行表征,并通过瞬态光电流法和气相色谱仪对其产氢性能进行分析。结果表明,Cd_(0.5)Zn_(0.5)S/N-g-C_(3)N_(4)复合催化剂具有较好的催化性能,产氢速率为20.431μmol/h,Cd_(0.5)Zn_(0.5)S/N-g-C_(3)N_(4)复合光催化剂有较高的氧化还原电势和电荷载体的快速迁移能力。 | 袁钊 刘忠久 蔡铁强 李高旗 潘自琼 郭卓 | 2022 | 现代化工2022，42，5： | 0 |
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