Ag/AgCl/质子化g-C3N4纳米复合材料的制备及其光催化性能的研究

摘要

Ag/AgCl/protonated g-C3N4 (Ag/AgCl/p-g-C3N4) nanocomposites were synthesized by the deposi-tion-precipitation method.The structures,morphologies and optical properties of samples were characterized by XRD,TEM,XPS,UV-Vis and PL.UV-Vis and PL analysis showed that the response abilities to visible light and the separation efficiency of photogenerated charges of p-g-C3N4 and Ag/AgCl/p-g-C3N4 nanocomposites were significantly enhanced.The photocatalytic performances of samples were evaluated by photodegradation of methyl orange (MO),tetracycline hydrochloride (TC) and ciprofloxacin (CIP) under visible light irradiation. The photodegradation rates of the optimized Ag/AgCl/p-g-C3N4 nanocomposite to MO,TC and CIP were 90. 4% (60 min),92.4% (120 min) and 76.1% (120 min) under visible light irradiation,respectively.Besides, Ag/AgCl/p-g-C3N4 nanocomposite showed good photocatalyticability.The enhanced photocatalytic perform-ances of Ag/AgCl/p-g-C3N4 nanocomposites were attributed to the strong surfaced plasmon resonance (SPR) effect of Ag nanoparticles and the synergistic effect between Ag,AgCl and p-g-C3N4 .%采用沉积-沉淀法制备Ag/AgCl/质子化g-C3N4(Ag/AgCl/p-g-C3N4)纳米复合材料,通过XRD、TEM、XPS、UV-Vis和PL对样品的结构、形貌和光学性能进行了表征.UV-Vis和PL分析表明,相比于纯g-C3N4,p-g-C3N4和Ag/AgCl/p-g-C3N4纳米复合材料对可见光的响应能力和光生载流子的分离效率明显增强.通过可见光下降解甲基橙(MO)、盐酸四环素(TC)和环丙沙星(CIP)溶液评价样品的光催化性能.经优化后的Ag/AgCl/p-g-C3N4纳米复合材料在可见光照射60 min后对MO的降解率达到90.4%,照射120 min后对TC和CIP的降解率分别为92.4%和76.1%.此外,Ag/AgCl/p-g-C3N4纳米复合材料具有良好的光催化稳定性.Ag/AgCl/p-g-C3N4纳米复合材料增强的光催化性能归因于Ag纳米颗粒的SPR效应以及Ag、AgCl和p-g-C3N4之间的协同效应.