A facile approach to synthesize oxygen doped g-C3N4 with enhanced visible light activity under anoxic conditions via oxygen-plasma treatment

作者：Qu, Xiaoyu; Hu, Shaozheng^*; Bai, Jin; Li, Ping; Lu, Guang; Kang, Xiaoxue

来源：New Journal of Chemistry, 2018, 42(7): 4998-5004.

DOI：10.1039/c7nj04760f

• GRAPHITIC CARBON NITRIDE
• PHOTOCATALYTIC NO OXIDATION
• HYDROGEN EVOLUTION
• HYDROTHERMAL SYNTHESIS
• GRAPHENE OXIDE
• CO2 REDUCTION
• PERFORMANCE
• SEMICONDUCTORS
• BORON
• NANOPARTICLES

Photocatalytic oxidation technology for the anoxic removal of organic pollutants that exist under some oxygen-free conditions is attractive but challenging. In this work, oxygen doped graphitic carbon nitride (g-C3N4) with outstanding visible light activity under anoxic conditions is synthesized via oxygen-plasma treatment for the first time. Oxygen doping does not influence the structure of g-C3N4 but changes its morphology, enhances the S-BET, decreases the band gap energy and increases the separation efficiency of photogenerated electrons and holes, which increase anoxic photocatalytic RhB degradation constants by approximately 6 times. After plasma treatment, doped oxygen not only increases the adsorption ability of g-C3N4 but also captures photogenerated electrons to reserve photogenerated holes for RhB degradation under anoxic conditions. This study provides a new insight into the design and fabrication of oxygen-free photocatalysts.

• 出版日期2018-4-7
• 单位辽宁石油化工大学