Synthesis of 3D CQDs/urchin-like and yolk-shell TiO2 hierarchical structure with enhanced photocatalytic properties
作者： Zhaoying Guo , Qi Wang , Tao Shen , Xianjie Hou , Jianlei Kuang
DOI: 10.1016/J.CERAMINT.2018.12.052
关键词: Absorption spectroscopy 、 Raman spectroscopy 、 Photocatalysis 、 Visible spectrum 、 Chemical engineering 、 Crystallinity 、 Electrochemistry 、 Hydrothermal circulation 、 Materials science 、 Dispersion (chemistry)
摘要: Abstract A novel CQDs/TiO2 hierarchical structure with enhanced photocatalytic properties was achieved by uniformly decorating urchin-like and yolk-shell TiO2 microspheres (UYTMs) carbon quantum dots (CQDs) through an environmentally friendly hydrothermal process. The CQDs were firstly synthesized the electrochemical method, TEM, Raman PL characterizations strongly indicated that as-prepared exhibited good dispersion, high crystallinity unique up-conversion properties. UYTMs a NaOH-assisted process showed stable 3D large surface area, which beneficial for light absorption contacting contamination. combination of further successfully during process, demonstrated series tests. experiments suggested CQDs/UYTMs better activities than pure P25 under both visible UV irradiation. combining 6 wt% best efficiency, while excessive tended to inhibit activity. According results discussions, possible mechanism in improving efficiency is significantly proposed. property can broaden spectrum light. Moreover, CQDs, as electron reservoirs, are efficient separate electrons holes, leading improved activity CQDs/UYTMs.
sci-hub.se 参考文章(36)
S Girish Kumar, L Gomathi Devi, None, Review on Modified TiO2 Photocatalysis under UV/Visible Light: Selected Results and Related Mechanisms on Interfacial Charge Carrier Transfer Dynamics Journal of Physical Chemistry A. ,vol. 115, pp. 13211- 13241 ,(2011) , 10.1021/JP204364A
Peng Zhang, Ang Li, Jinlong Gong, Hollow spherical titanium dioxide nanoparticles for energy and environmental applications Particuology. ,vol. 22, pp. 13- 23 ,(2015) , 10.1016/J.PARTIC.2015.03.001
D. Sudha, P. Sivakumar, Review on the photocatalytic activity of various composite catalysts Chemical Engineering and Processing. ,vol. 97, pp. 112- 133 ,(2015) , 10.1016/J.CEP.2015.08.006
Huijun Yu, Yufei Zhao, Chao Zhou, Lu Shang, Yong Peng, Yinhu Cao, Li-Zhu Wu, Chen-Ho Tung, Tierui Zhang, Carbon quantum dots/TiO2 composites for efficient photocatalytic hydrogen evolution Journal of Materials Chemistry. ,vol. 2, pp. 3344- 3351 ,(2014) , 10.1039/C3TA14108J
Hexing Li, Zhenfeng Bian, Jian Zhu, Dieqing Zhang, Guisheng Li, Yuning Huo, Hui Li, Yunfeng Lu, Mesoporous titania spheres with tunable chamber stucture and enhanced photocatalytic activity. Journal of the American Chemical Society. ,vol. 129, pp. 8406- 8407 ,(2007) , 10.1021/JA072191C
D. Dolat, N. Quici, E. Kusiak-Nejman, A.W. Morawski, G. Li Puma, One-step, hydrothermal synthesis of nitrogen, carbon co-doped titanium dioxide (N,CTiO2) photocatalysts. Effect of alcohol degree and chain length as carbon dopant precursors on photocatalytic activity and catalyst deactivation Applied Catalysis B-environmental. ,vol. 115, pp. 81- 89 ,(2012) , 10.1016/J.APCATB.2011.12.007
Jian Tian, Yanhua Leng, Zhenhuan Zhao, Yang Xia, Yuanhua Sang, Pin Hao, Jie Zhan, Meicheng Li, Hong Liu, Carbon quantum dots/hydrogenated TiO2 nanobelt heterostructures and their broad spectrum photocatalytic properties under UV, visible, and near-infrared irradiation Nano Energy. ,vol. 11, pp. 419- 427 ,(2015) , 10.1016/J.NANOEN.2014.10.025
Yue Qi, Yi Luan, Mu Yang, Ge Wang, Li Tan, Jie Li, Alkali concentration-dependent tailoring of highly controllable titanate nanostructures: From yolk-shell, hollow 3D nanospheres to 1D nanowires Applied Surface Science. ,vol. 293, pp. 359- 365 ,(2014) , 10.1016/J.APSUSC.2013.12.170
Juanrong Chen, Fengxian Qiu, Wanzhen Xu, Shunsheng Cao, Huijun Zhu, Recent progress in enhancing photocatalytic efficiency of TiO2-based materials Applied Catalysis A-general. ,vol. 495, pp. 131- 140 ,(2015) , 10.1016/J.APCATA.2015.02.013
Jiaqi Pan, Yingzhuo Sheng, Jingxiang Zhang, Jumeng Wei, Peng Huang, Xin Zhang, Boxue Feng, Preparation of carbon quantum dots/ TiO2 nanotubes composites and their visible light catalytic applications Journal of Materials Chemistry. ,vol. 2, pp. 18082- 18086 ,(2014) , 10.1039/C4TA03528C