Photochemistry of semiconductor particles 5. Location of dyes in reverse micelles containing TiO2 nanoparticles and effects on photoinduced interfacial electron transfer
✍ Scribed by Ling Zang; Chun-Yan Liu; Xin-Min Ren
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 452 KB
- Volume
- 88
- Category
- Article
- ISSN
- 1010-6030
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✦ Synopsis
TiO2 nanoparticles have been prepared in sulphosuccinate sodium salt) reverse micelles. Three dyes, eosin (EO), methyl thionine (MT) and rhodamine B (RB), with different net charges were chosen as probes solubilized in the water phase to investigate the interaction with TiO2 particles and AOT micelles. It was found from the spectral characteristics of the dyes that the three dye molecules were located at different places in the reverse micelles. EO was adsorbed on to the TiO2 particles, whereas MT was transferred into the micelle phase. This was attributed to the different charges of the dyes, which determine their interaction with the micelle surface. The different locations of the dyes resulted in different efticiencies of photoinduced interfacial electron transfer from the dyes to the TiO2 particles. This can be explained in relation to the contact of the dyes with the TiO2 surface.