【摘要】 采用调控块状石墨相氮化碳（g-C₃N₄）的微观形貌来增加比表面积是提高其光催化性能的有效方法。利用不同溶剂的导向作用将前驱体组装成超分子聚集体，并在熔融盐介质中煅烧，成功制备了锥形、花状、珊瑚状和多孔球形形貌的g-C₃N₄。通过红外光谱、全自动比表面积测定、荧光光谱和紫外-可见漫反射光谱分析其结构，并进行光催化性能评价。结果表明，相对于块状g-C₃N₄,多形貌g-C₃N₄均引入了氰基基团，并增大了比表面积，拓宽了可见光吸收范围。由于光生载流子的复合被抑制，多形貌g-C₃N₄对罗丹明B的降解效率明显高于块状g-C₃N₄,其中锥形g-C₃N₄的降解性能最好，经5次循环后，降解性能仍达到90%。更多还原

【Abstract】 Construction of particular morphology of carbon nitride（g-C₃N₄） to provide large specific surface area is an effective way to accelerate its photocatalytic performance.Melamine and cyanuric acid were assembled by the direction-induced function of solvent, and then the products were calcinated in the presence of inorganic salts.The resultant g-C₃N₄ presented different ordered structures, depending on the solvent from which it was mixed.The FTIR,BET,PL and DRS analyses its structure, and the photocatalytic performance was evaluated.The result showed that relative to the g-C₃N₄ leading to enlarge the specific surface area and increase the absorption range of visible light.In all cases, the g-C₃N₄ exhibited superior photocatalytic activity compared to the bulk material on the account of the inhibition of recombination of photogenerated carriers, in particular, the hollow spindle-like g-C₃N₄ exhibits highest stability and efficiency（more than 90%） for the degradation of Rhodamine B（RhB） dye even after 5 consecutive runs.更多还原