新型介孔石墨相氮化碳/碘化铋异质结用于增强可见光照射下的光催化性能。
Novel mesoporous graphite carbon nitride/BiOI heterojunction for enhancing photocatalytic performance under visible-light irradiation.
作者信息
Chang Chun, Zhu Lingyan, Wang Shanfeng, Chu Xiaolong, Yue Longfei
机构信息
Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University , Tianjin 300071, P.R. China.
出版信息
ACS Appl Mater Interfaces. 2014 Apr 9;6(7):5083-93. doi: 10.1021/am5002597. Epub 2014 Mar 25.
A novel organic-inorganic three-dimensional (3D) mesoporous graphite carbon nitride/BiOI (MCN/BiOI) heterojunction photocatalyst with excellent visible-light-driven photocatalytic performance was synthesized by a facile solvothermal method and used for degradation of bisphenol A (BPA) in water. After hybridization with MCN, a heterojunction was formed and the photogenerated carriers could be effectively separated by the internal electric field built at the heterojunction interface. The photocatalytic and photoelectrochemical performance of BiOI were improved and much higher than pure BiOI and MCN. The best photocatalytic performance was achieved with MCN proportion of 10%, and the kobs was approximately 1.6 times of pure BiOI and 3.4 times of MCN under simulated solar light irradiation, respectively. The photocurrent intensity generated by 10%-MCN/BiOI electrode was about 1.5 and 2.0 times of those induced by BiOI and MCN under visible-light irradiation, respectively. The superoxide radical species were predominant in the reaction system.
通过简便的溶剂热法合成了一种具有优异可见光驱动光催化性能的新型有机-无机三维（3D）介孔石墨相氮化碳/BiOI（MCN/BiOI）异质结光催化剂，并将其用于水中双酚A（BPA）的降解。与MCN杂化后，形成了异质结，光生载流子可通过在异质结界面处建立的内建电场有效分离。BiOI的光催化和光电化学性能得到改善，远高于纯BiOI和MCN。当MCN比例为10%时，获得了最佳光催化性能，在模拟太阳光照射下，表观反应速率常数分别约为纯BiOI的1.6倍和MCN的3.4倍。在可见光照射下，10%-MCN/BiOI电极产生的光电流强度分别约为BiOI和MCN诱导光电流强度的1.5倍和2.0倍。反应体系中主要是超氧自由基。
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