Photocatalytic activity of ZnO/Sn1−xZnxO2−x nanocatalysts: A synergistic effect of doping and heterojunction
Photocatalytic activity of ZnO/Sn1−xZnxO2−x nanocatalysts: A synergistic effect of doping and heterojunction
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DOI：
10.1016/j.apcatb.2013.10.042
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发表时间：
2014-04
影响因子：
22.1
通讯作者：
Lirong Zheng;Chongqi Chen;Yuanhui Zheng;Y. Zhan;Yanning Cao;Xingyi Lin;Q. Zheng;K. Wei;Jiefang Zhu
中科院分区：
文献类型：
--
作者：
Lirong Zheng;Chongqi Chen;Yuanhui Zheng;Y. Zhan;Yanning Cao;Xingyi Lin;Q. Zheng;K. Wei;Jiefang Zhu
A novel configuration of porous ZnO/Sn1−xZnxO2−xheterojunction nanocatalyst with high photocatalytic activity was successfully synthesized through a simple two-step solvothermal method. Porous Sn1−xZnxO2−xwas synthesized from Zn2+and Sn4+precursors with the Zn/Sn ratio of 2:1 in the absence of alkali, and then intermolecular dehydrolysis led to the formation of heterointerface between Sn1−xZnxO2−xand ZnO. The results show that Zn2+doping exhibits a significant influence on particle size of SnO2leading to much higher specific surface area and larger band gap, which is in favor of the photocatalytic activity of SnO2under UV light irradiation. In addition, the formation of ZnO/Sn1−xZnxO2−xheterostructure improves the separation of photogenerated electron–hole pairs due to the potential difference between Sn1−xZnxO2−xand ZnO, which also benefits to photocatalysis. By taking account of them together, these results provide further insight into the synergistic effects of metal ion doping and semiconductor/semiconductor heterostructure on the activity of photocatalysts in environmental remediation applications.
