【摘要】 以石墨相氮化碳（g-C₃N₄）为主要催化剂,α-Fe₂O₃为助催化剂,还原氧化石墨烯（RGO）为电子通道,通过高温煅烧法、水热法和机械搅拌法构筑了g-C₃N₄/α-Fe₂O₃/RGO三元复合光催化剂,探讨了不同RGO含量时光催化剂在可见光下对有机染料罗丹明B的光催化降解活性,并对催化剂的结构、形貌进行了表征。结果表明,六角柱状的α-Fe₂O₃负载在片层状的g-C₃N₄上,周围分散着絮状RGO。降解实验表明,当RGO的含量为5%时,g-C₃N₄/α-Fe₂O₃/RGO的光催化性能最佳,这主要是由于α-Fe₂O₃的加入拓宽了材料的光响应范围,另外RGO的加入提供了一个电子通道,促进了材料内光生电子-空穴对的迁移与分离。更多还原

【Abstract】 Using g-C₃N₄ as the main catalyst，α-Fe₂O₃ as the catalyst and RGO as the electron channel,the g-C₃N₄/α-Fe₂O₃/RGO ternary photocatalyst was constructed by high-temperature calcining,hydrothermal and mechanical stirring methods.The photocatalytic degradation of rhodamine B by photocatalyst with different RGO contents under visible light was investigated,and the structure and morphology of the catalyst were characterized.The results shown that the hexagonal columnar α-Fe₂O₃ was loaded on the lamellar g-C₃N₄,surrounded by floccus RGO.Degradation experiments showed that the catalytic activity of g-C₃N₄/α-Fe₂O₃/RGO was better than that of g-C₃N₄/α-Fe₂O₃.When the content of RGO was 5%,the photocatalytic performance of g-C₃N₄/α-Fe₂O₃/RGO was the best.This was mainly due to the addition of α-Fe₂O₃ to broaden the optical response range of the material,in addition,the addition of RGO provided an electronic channel,promoting the migration and separation of photogenerated electronholes in the material.更多还原