摘要
以十二烷基硫酸钠(SDS)-聚乙烯吡咯烷酮(PVP)组成的项链状软物质团簇为可调性软模板,采用N2H4.H2O为还原剂,还原CuSO4制备Cu2O中空亚微球。XRD结果确定产物为Cu2O立方晶系晶体;表面孔径吸附测试确定其表面多孔的特殊形貌;从SEM、TEM图像可以看出,产物Cu2O晶体为表面粗糙、具有中空结构的规整亚微球;用SDS-PVP项链状软物质团簇模板诱导二次组装作用成功解释了Cu2O中空亚微球的生长过程。随着Cu2O中空亚微球粒径减小,其紫外-可见特征吸收峰发生蓝移,利用半导体公式换算出Cu2O中空亚微球的禁带宽度;相同激发波长下,随着Cu2O中空亚微球粒径减小,光致发光强度增大。
In this paper, hollow cuprous oxide （Cu2O） submicrospheres were prepared by simply reducing CuSO4 with N2H4 ·H2O in the template of SDS-PVP soft cluster. XRD pattern shows that the synthesized hollow submierospheres are pure Cu2O. The N2 adsorption-desorption isotherms indicate the presence of the inhomogeneous mesopores and macropores. SEM and TEM images demonstrate the products are hollow submicrospheres with rough surface and uniform size. The growing progress of the Cu2O hollow submierospheres were explained by the secondary assembly induced by the SDS-PVP soft clusters. With the decrease of the size of Cu2O hollow submicrospheres, its UV-vis characteristic absorption peaks considerably blue-shifted from the absorption of bulk Cu2O. According to the semiconductor equation, a classical Taue approach is further employed to estimate the Eg value of Cu2O hollow submicrospheres. The photoluminescenee spectra of Cu2O hollow submicrospheres was recorded on a fluorescence spectrophotometer, at the same excitation wavelength. It is shown that the intensity is increased while the size is reducing.
出处
《江南大学学报（自然科学版）》
CAS
2009年第5期601-606,共6页
Joural of Jiangnan University (Natural Science Edition)
基金
国家自然科学基金项目(20871059
20371021)
关键词
氧化亚铜
中空亚微球
软团簇
光学性能
Cu2O, hollow submicrospheres, soft cluster, optical properties
作者简介
冯冯（1988-），女，安徽合肥人，应用化学专业本科生。
通讯作者：方云（1957-），男，江苏扬州人，教授，博士生导师。主要从事表面活性剂与胶体研究。Email：yunfang@126．com
