Heterojunctions between amorphous and crystalline niobium oxide with enhanced photoactivity for selective aerobic oxidation of benzylamine to imine under visible light
Heterojunctions between amorphous and crystalline niobium oxide with enhanced photoactivity for selective aerobic oxidation of benzylamine to imine under visible light
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无定形和结晶氧化铌之间的异质结具有增强的光活性，用于可见光下苯甲胺选择性有氧氧化为亚胺
DOI：
10.1039/c5ta03214h
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发表时间：
2015-08
影响因子：
11.9
通讯作者：
Zhu Huaiyong
中科院分区：
文献类型：
--
作者：
Zhang Yantao;Pei Linjuan;Zheng Zhanfeng;Yuan Yong;Xie Tengfeng;Yang Juan;Chen Shuai;Wang Junwen;Waclawik Eric R.;Zhu Huaiyong
在具有不同带隙结构的两个晶体之间形成异质结，作为光生电荷单向转移的隧道，是提高半导体光催化剂的光催化性能的有效策略。考虑到表面络合物光催化剂也表现出电荷分离和复合过程，异质结也可以通过影响光生电子的转移来促进任何表面络合物催化剂的可见光响应光活性。在此，Nb2O5微纤维，具有高表面积的界面之间的非晶相和结晶相，设计和合成的煅烧的氢形式的草酸盐，同时控制结晶。这些微纤维对选择性好氧氧化反应的光活性进行了研究。正如所预测的，Nb2O5微纤维含有异质结表现出最高的光活性。这可能是由于非晶相和晶相之间的带隙差允许电子单向转移，这降低了复合速率并提高了效率。
The formation of heterojunctions between two crystals with different band gap structures, acting as a tunnel for the unidirectional transfer of photogenerated charges, is an efficient strategy to enhance the photocatalytic performance of semiconductor photocatalysts. Considering that surface complex photocatalysts also exhibit charge separation and recombination processes, the heterojunctions may also promote the visible-light-response photoactivity of any surface complex catalysts by influencing the transfer of photogenerated electrons. Herein, Nb2O5 microfibers, with a high surface area of interfaces between an amorphous phase and a crystalline phase, were designed and synthesised by the calcination of hydrogen-form niobate while controlling the crystallisation. The photoactivity of these microfibres towards selective aerobic oxidation reactions was investigated. As predicted, the Nb2O5 microfibres containing heterojunctions exhibited the highest photoactivity. This could be due to the band gap difference between the amorphous phase and the crystalline phase that allows electron transfer unidirectionally, which decreased the recombination rate and improved the efficiency.
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DOI：
10.1039/c4cp02834a
发表时间：
2014-09
期刊：
Physical chemistry chemical physics : PCCP
影响因子：
--
作者：
Lei Pan;Yi Wang;Xianjie Wang;Hui-Ying Qu;Jiupeng Zhao;Yao Li;A. Gavrilyuk
通讯作者：
Lei Pan;Yi Wang;Xianjie Wang;Hui-Ying Qu;Jiupeng Zhao;Yao Li;A. Gavrilyuk
影响因子：
7.4
作者：
Hawkins, CL;Davies, MJ
通讯作者：
Davies, MJ
影响因子：
--
作者：
Yun Zhao;C. Eley;Jing-yu Hu;J. Foord;L. Ye;Heyong He;S. Tsang
通讯作者：
Yun Zhao;C. Eley;Jing-yu Hu;J. Foord;L. Ye;Heyong He;S. Tsang
影响因子：
56.9
作者：
Chen, Xiaobo;Liu, Lei;Mao, Samuel S.
通讯作者：
Mao, Samuel S.
影响因子：
4.5
作者：
R. Kydd;W. Y. Teoh;J. Scott;D. Ferri;R. Amal
通讯作者：
R. Kydd;W. Y. Teoh;J. Scott;D. Ferri;R. Amal