摘要
主要研究β-环糊精(β-CD)对水热法制备氧化锌(ZnO)及其光催化性能影响,采用XRD、SEM、FTIR和UV-Vis对制备的ZnO样品进行表征,并用罗丹明B(RB)模拟印染废水,考察ZnO光催化性能。结果表明,水热环境下β-CD既可抑制ZnO晶体沿[0001]方向的生长,又可抑制ZnO晶体的团聚,ZnO晶粒逐渐变小;当β-CD浓度达到18g·L-1时,可以得到纳米刺球状ZnO,对光生电子的捕获能力较强,光催化活性比普通水热合成的ZnO提高近20%。β-CD可以作为水热法制备特殊形貌ZnO的形貌控制剂,刺球状ZnO在染料废水处理方面将具有巨大的应用价值。
The effects ofβ-cyclodextrin（β-CD）on the hydrothermal synthesis of zinc oxide（ZnO）and the photocatalytic behaviors of ZnO were studied.The as-prepared ZnO samples were characterized by XRD,SEM,and UVVis.The photocatalytic behaviors of ZnO were characterized by the degradation of printing and dyeing wastewater,which was simulated via rhodamine B（RB）degradation.The crystal sizes of ZnO were reduced because of the inhibitory effects ofβ-CD on the（0001）crystal face growth of ZnO crystal and the agglomeration of ZnO crystal.Prickly sphere-liked ZnO crystal could be synthesized with the addition of 18g·L-1β-CD,and the photocatalytic performance of the prickly sphere-liked ZnO crystal was increased by 20%.In conclusion,β-CD could be used as a morphology control agent for the hydrothermal synthesis of ZnO,and the prickly sphere-like ZnO would have a great application value in the treatment of printing and dyeing wastewater.
基金
江苏省基金资助项目(BK20130094)
江苏省高校自然科学基金面上项目(15KJB430014)
金陵科技学院博士启动项目(JIT-B-201233)
江苏省新型环保重点实验室开放项目(AE201308)
关键词
Β-环糊精
氧化锌
水热法
光催化
β-cyclodextrin
zinc oxide
hydrothermal synthesis
photocatalysis
