| TiO2纳米刺球制备和表征 |
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| 引用本文： | 李行璐,徐晓明,王乐,韩国彬. TiO2纳米刺球制备和表征[J]. 厦门大学学报(自然科学版), 2012, 51(5): 888-892 |
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| 作者姓名： | 李行璐 徐晓明 王乐 韩国彬 |
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| 作者单位： | 厦门大学化学化工学院,福建厦门,361005 |
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| 基金项目： | 厦门大学科技创新重点基金项目(XMKJCX20052001) |
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| 摘 要： | 采用溶胶-凝胶法制备出球形TiO2纳米粒子,通过离心的方法将TiO2纳米粒子从乙醇中转移到水中.在60℃下,将分散剂聚乙烯吡咯烷酮(PVP)和刻蚀剂NaBH4加入到TiO2纳米粒子水分散体系中,经61h的恒温刻蚀反应,制备出TiO2纳米刺球.此外,该刻蚀方法同样被应用于Au@SiO2@TiO2纳米刺球的制备.用扫描电子显微镜(SEM)、动态光散射(DLS)、透射电镜(TEM)及X射线衍射实验(XRD)等方法对TiO2纳米粒子和Au@SiO2@TiO2纳米粒子及其纳米刺球进行表征,进而探索NaBH4刻蚀TiO2的机理.该刻蚀方法所需的设备和实验步骤相对简单,反应条件温和可控,较易实现大批量的TiO2纳米刺球的合成并且也适用于外壳层为TiO2的复合核壳结构纳米刺球的制备.
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| 关 键 词： | TiO2 纳米粒子 刺球 |
Synthesis and Characterization of TiO2 Nano-acanthosphere |
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| LI Xing-lu , XU Xiao-ming , WANG Le , HAN Guo-bin. Synthesis and Characterization of TiO2 Nano-acanthosphere[J]. Journal of Xiamen University(Natural Science), 2012, 51(5): 888-892 |
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| Authors: | LI Xing-lu XU Xiao-ming WANG Le HAN Guo-bin |
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| Affiliation: | (College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China) |
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| Abstract: | The novel synthesis of nano-acanthosphere via etching method was developed.The uniform spherical TiO2 nanoparticles were synthesized via sol-gel method,and the prepared TiO2 nanoparticles were centrifuged to be separated from ethanol,followed by dispersing in water,and etching by NaBH4 under PVP protection for 61 h at 60 ℃ to produce TiO2 nano-acanthosphere.In addition,the etching method was also applied to synthesize Au@SiO2@TiO2 hybrid nanospheres.By means of SEM,DLS,TEM and XRD methods,the structure and properties of nano-acanthosphere formed from spherical nanoparticles were characterized and the etching mechanism was inquired.The reported etching method is rather facile,its mild and easy controllable reaction condition make it readily up-scalable for fabrication of TiO2/TiO2 outer shell-based hybrid nano-acanthosphere. |
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| Keywords: | TiO2 nanoparticles acanthosphere |
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