A facile approach to load CdSe nanocrystallites into mesoporous SBA-15

• DOI: 10.1016/j.matchemphys.2004.07.007
• Publication Date: 2004-08-17T13:09:01Z
• Authors: Yan Shan; Lian Gao; Shan Zheng
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract CdSe nanocrystallites have been successfully loaded inside the channel of SBA-15 by a two-step impregnation at room temperature. The method is safe and does not require any special equipment. XRD, N 2 adsorption–desorption isotherms, HRTEM, EDS, FTIR, and UV–vis absorption spectrum were used to characterize the structure of the composite materials. It is found that most of the CdSe nanocrystallites are about 7 nm, and they stretch along the channels of SBA-15 with the length varying from 10 to 40 nm. The CdSe nanocrystallites inside the SBA-15 hosts show a significant blue-shift in the UV–vis absorption spectrum.