文献类型：期刊文献

英文题名：High Degradation Activity and Quantity Production of Aluminum-Doped Zinc Oxide Nanocrystals Modified by Nitrogen Atoms

作者：Wang, Jian-Dong[1];Liu, Jin-Ku[1];Tong, Qin[1];Lu, Yi[1];Yang, Xiao-Hong[2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Chizhou Univ, Dept Chem, Chizhou 247000, Peoples R China

年份：2014

卷号：53

期号：6

起止页码：2229

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20140917378368);WOS:【SCI-EXPANDED(收录号:WOS:000331343600017)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant 21341007), Fundamental Research Funds for the Central Universities (Grant 222201313005), and State Key Laboratory of Pollution Control and Resource Reuse Foundation (Grant 13019).

语种：英文

外文关键词：Atoms - Photocatalysis - Photocatalysts - Urea - Nanocrystals - Nitrogen - Organic pollutants - Flow velocity - Rhodium compounds - Water pollution - Zinc oxide - Light - Photodegradation - Water treatment

摘要：The precursor of aluminum-doped zinc oxide nanocrystals modified by nitrogen atoms (N-AZO) can be quantity-produced by ultrasonic hydrothermal equipment. Then the N-AZO photocatalysts with good visible-light response were synthesized via solid-phase method with urea as a nitrogen source. The ultraviolet visible (UV-vis) patterns of N-AZO nanocrystals obviously showed a red shift toward the visible-light region compared to pure aluminum-doped zinc oxide (AZO) nanocrystals and an absorbance in the wavelength range of 450-600 nm which was attributed to the change of lattice structure after nitrogen doping. The photocatalytic activity of N-AZO photocatalysts were investigated by the degradation of RhB solution in sunlight irradiation. The ratio of nitrogen atoms to Zn atoms had significant impact on the photocatalytic efficiency of N-AZO nanocrystals. The experimental results showed that the optimal doping mole ratio of urea molecules to zinc atoms was 6:5, and the RhB dyes were degradated completely within 2 h, exhibiting that improved photocatalytic activity increased by 400% compared with that of pure AZO nanocrystals. What is more, a feasible water purification reactor with continuous photodegradation was manufactured which was also suitable to degrade other kinds of organic pollutants by changing the effective photocatalyst. The result showed that when the flow velocity of RhB solution (2 x 10(-5) g/L) was 60 mL/min, the degradation rates of the four reactors were about 38%, 48%, 62.5%, and 100%, respectively.