Synthesis of Au@TiO2 Core-Shell Nanoparticles
碩士 === 國立臺北科技大學 === 有機高分子研究所 === 99 === This thesis included two parts. In the first part, we synthesized the gold nanoparticles (Au-NP) by reducing of hydrogen tetrachloroaurate (HAuCl4) by sodium thiocyanate (NaSCN) and sodium citrate (Na3-citrate). The thiocyanate ions adsorbed on Au-NP form self...
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| Format: | Others |
| Language: | zh-TW |
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2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/fdpr43 |
| Summary: | 碩士 === 國立臺北科技大學 === 有機高分子研究所 === 99 === This thesis included two parts. In the first part, we synthesized the gold nanoparticles (Au-NP) by reducing of hydrogen tetrachloroaurate (HAuCl4) by sodium thiocyanate (NaSCN) and sodium citrate (Na3-citrate). The thiocyanate ions adsorbed on Au-NP form self-assembled monolayers on Au-NP to make dispersion of Au-NP in the solution.. The size of Au-NP was as small as 4 nm. Using Na3-citrate as reducing and stabilizing reagent, the diameter of the Au-NP is about 16 to 17 nm.
The second part of the thesis is to apply a one-pot hydrothermal reaction to synthesize the Au-TiO2 core-shell nanoparticles (Au@TiO2) using titanium tetrafluoride as TiO2 precursors and HAuCl4 as Au precursor and ascorbic acid/Na3-citrate mixture as reducing agent. Two different morphology of Au@TiO2 nanostructures were obtained after 48 h hydrothermal reaction at 180 °C . The preliminary trial of Au@TiO2 in dye-sensitized solar cells was performed.
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