| 基于碳量子点的TiO2改性及降解污染物性能 |
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| 引用本文： | 姜婷婷,石勇,柯军,许开立.基于碳量子点的TiO2改性及降解污染物性能[J].东北大学学报(自然科学版),2018,39(1):138-142. |
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| 作者姓名： | 姜婷婷 石勇 柯军 许开立 |
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| 作者单位： | (1. 东北大学 资源与土木工程学院， 辽宁 沈阳110819; 2. 大连理工大学 环境学院， 辽宁 大连116024; 3. 武汉工程大学 化学与环境工程学院， 湖北 武汉430074) |
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| 基金项目： | 国家重点基础研究发展计划项目(2017YFC0805101). |
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| 摘 要： | 采用溶胶-凝胶法合成掺入碳量子点(CQDs)的TiO2纳米复合光催化剂，通过荧光光谱、紫外-可见吸收光谱、X射线衍射、扫描电镜等进行表征，并在可见光下降解亚甲基蓝(MB)染料溶液以评价其光催化性能.研究表明，CQDs具备上转换荧光特性，掺入CQDs的TiO2样品可见光响应明显提升.水热法180℃下反应6h制备的CQDs，其溶液加入量为10mL时TiO2/CQDs样品光催化活性最高，115min后MB的降解率达80%.TiO2/CQDs样品主要以锐钛矿相存在，颗粒呈球形，比表面积高达200m3·g-1.
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| 关 键 词： | TiO2 碳量子点 溶胶-凝胶法 光催化降解 亚甲基蓝 |
TiO2 Photocatalyst Modified by Carbon Quantum Dots and Its Activity in Pollutants Degradation |
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| JIANG Ting-ting,SHI Yong,KE Jun,XU Kai-li.TiO2 Photocatalyst Modified by Carbon Quantum Dots and Its Activity in Pollutants Degradation[J].Journal of Northeastern University(Natural Science),2018,39(1):138-142. |
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| Authors: | JIANG Ting-ting SHI Yong KE Jun XU Kai-li |
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| Institution: | 1. School of Resources ＆ Civil Engineering， Northeastern University， Shenyang 110819， China； 2. School of Environment， Dalian University of Technology， Dalian 116024， China； 3. School of Chemistry and Environmental Engineering， Wuhan Institute of Technology， Wuhan 430074， China. |
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| Abstract: | The nanocomposite photocatalyst TiO2 modified by carbon quantum dots(CQDs) was first prepared by sol-gel method and represented by fluorescence spectra， UV-vis absorption spectra， X-ray diffraction and scanning electron microscope. Then， the photocatalytic activity was investigated by degrading methylene blue(MB) in visible light. Results show that CQDs exhibits an upconversion fluorescence， meanwhile， the visible-light response of TiO2 modified by CQDs was significantly improved. For the TiO2/CQDs obtained by hydrothermal method under 180 ℃ lasting for 6h， when the doping amount is 10 mL， the photocatalytic activity is the highest. The degradation rate of MB comes to 80% after 115 min. The TiO2/CQDs is mainly composed by anatase， whose particles take on a spherical shape with a specific surface area up to 200 m3·g-1. |
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| Keywords: | TiO2 carbon quantum dots(CQDs) sol-gel method photocatalytic degradation methylene blue |
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