| 纳米TiO2分散液的制备及其光催化性能 |
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| 作者姓名： | 吴志娇 翟彦青 郭瑞 曹宝升 朴玲钰 |
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| 作者单位： | 1.中国科学院纳米标准与检测重点实验室, 中国科学院纳米科学卓越创新中心, 国家纳米科学中心, 北京 100190;2.北京石油化工学院化学工程学院, 北京 102617 |
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| 基金项目： | 科技部重点研发计划（2016YFA0200900，2016YFF0203803）与战略性先导科技专项-A类纳米技术的环境、健康和安全评价体系（XDA09040400）资助 |
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| 摘 要： | 利用沉淀-溶剂热联用方法，制备粒径约为30nm的TiO2材料，作为光催化分散液的光催化剂。采用X射线粉末衍射（XRD）、电镜（透射TEM、扫描SEM）、拉曼、红外光谱（FT-IR）和X射线光电子能谱（XPS）等技术对纳米TiO2的晶型、形貌、结构与表面特性进行表征。制备的TiO2为粒度均匀、分散良好的锐钛矿型纳米TiO2。在不做任何修饰的情况下，将纳米TiO2置于水中，通过超声得到分散均匀、稳定性好的纳米TiO2水性分散液，室温静置180d后仍保持澄清透明，无沉淀析出。180d后，该分散液对有机污染物罗丹明B的降解仍旧表现出优异的光催化活性，光照15min后罗丹明B明显褪色，30min完全降解，无活性损失。将该分散液喷涂在铝板基底上，表现出良好的自清洁能力。本文提供了一种可规模化生产、成本低、过程易控的纳米光催化分散液制备思路。
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| 关 键 词： | 纳米二氧化钛 分散液 光催化 分散性 稳定性 |
| 收稿时间： | 2017-10-26 |
| 修稿时间： | 2017-12-07 |
Preparation of nano-TiO2 dispersion solution and its photocatalytic activity |
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| Authors: | WU Zhijiao ZHAI Yanqing GUO Rui CAO Baosheng PIAO Lingyu |
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| Institution: | 1.Key Laboratory of Standardization and Measurement for Nanotechnology of Chinese Academy of Sciences, Center for Excellence in Nanoscience of Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100190, China;2.School of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China |
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| Abstract: | In this work, a kind of nano-TiO2 dispersion solution with excellent dispersity and stability was prepared and its photocatalytic activity was studied. The TiO2 nanoparticles (NPs) with particle size of 30nm were prepared using a combined method of precipitation and solvothermal. The morphology, structure, and surface state of TiO2 NPs were characterized by transmission electron microscope (TEM), scanning electron microscopy (SEM), X-ray powder diffraction (XRD), Fourier transform infrared spectra (FT-IR), and X-ray photoelectron spectroscopy (XPS). The results show that the TiO2 NPs are of anatase type with uniform particle size and good dispersion. Without surface modification, the prepared TiO2 dispersion solution keeps transparent after aged for 180 days at room temperature. Under UV irradiation, the dispersion shows excellent photocatalytic activity on degradation of rhodamine B. The aluminum substrates exhibit good self-cleaning ability after modification by the prepared dispersion. |
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| Keywords: | TiO2 nanoparticles" target="_blank">2 nanoparticles')">TiO2 nanoparticles dispersion photocatalysis dispersibility stability |
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