Constructing effective photocatalytic purification system with P-introduced g-C 3 N 4 for elimination of UO 2 2+
作者： Xi Wu , Shujuan Jiang , Shaoqing Song , Chuanzhi Sun
DOI: 10.1016/J.APSUSC.2017.06.065
关键词: Heptazine 、 Band gap 、 Photochemistry 、 Delocalized electron 、 Materials science 、 Electronic structure 、 Charge carrier 、 Inorganic chemistry 、 Uranyl 、 Photocatalysis 、 Absorption (electromagnetic radiation)
摘要: Abstract Due to the inherent defects of precursor molecular structure, limited effect structure in formed g-C3N4 will weaken extension delocalization π electrons between adjacent tri-s-triazine or heptazine units g-C3N4, which thus leads poor visible-light absorption, low utilization efficiency charge carrier. Herein, P-introduced (PC3N4) photocatalysts were constructed by partially replacing C with tributyl phosphate as precursor, and as-designed PC3N4 used eliminate aqueous uranyl ion photocatalytic reduction technology under irradiation. Experimental DFT revealed that introduction P into significantly modified its electronic reflected narrowed band gap, enhanced absorption well improved transfer capability photogenerated charge. Therefore, activity was much better than pristine conventional reducing-type photocatalysts. This study suggests an efficient strategy for construct effective visible-light-responsive radioactive environmental remediation.
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