Figure 6.

The excitation (a) and emission (b) spectra for CeF3: Eu3+/SBA-15/SI, CeF3: Eu3+/SBA-15/SS, and CeF3: Eu3+/SBA-15/IS

Li and Yan Nanoscale Research Letters 2010 5:701   doi:10.1007/s11671-010-9534-0