Ke Jun, Li Xinyong, Zhao Qidong, Liu Baojun, Liu Shaomin, Wang Shaobin
State Key Laboratory of Fine Chemical, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China; School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430072, China; Department of Chemical Engineering, Curtin University, Perth, GPO Box U1987, WA 6845, Australia.
State Key Laboratory of Fine Chemical, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China; Department of Chemical Engineering, Curtin University, Perth, GPO Box U1987, WA 6845, Australia.
J Colloid Interface Sci. 2017 Jun 15;496:425-433. doi: 10.1016/j.jcis.2017.01.121. Epub 2017 Feb 3.
It finds that CQDs synthesized by hydrothermal method possess obvious upconversion properties that could transfer low energy photons to high energy photons, resulting in enhanced visible light response and utilization. Herein, carbon quantum dots (CQDs) modified TiO photocatylysts were successfully prepared by a facile sol-gel method. Photophysical and surficial properties of the as-prepared composite photocatalyst were investigated in details. Furthermore, photocatalytic performance was tested by degrading methylene blue (MB) under visible light irradiation. The degradation efficiency of methylene blue (MB) is as high as 90% within 120min, which is 3.6 times higher than that of pure TiO.
研究发现，通过水热法合成的碳量子点（CQDs）具有明显的上转换特性，能够将低能量光子转换为高能量光子，从而增强可见光响应和利用。在此，采用简便的溶胶 - 凝胶法成功制备了碳量子点（CQDs）修饰的TiO光催化剂。详细研究了所制备的复合光催化剂的光物理和表面性质。此外，通过在可见光照射下降解亚甲基蓝（MB）来测试光催化性能。亚甲基蓝（MB）在120分钟内的降解效率高达90%，比纯TiO高3.6倍。
