Novel in situ fabrication of conjugated microporous poly (benzothiadiazole)-Bi2MoO6 Z-scheme heterojunction with enhanced visible light photocatalytic activity
Novel in situ fabrication of conjugated microporous poly (benzothiadiazole)-Bi2MoO6 Z-scheme heterojunction with enhanced visible light photocatalytic activity
复制标题
新型原位制备具有增强可见光催化活性的共轭微孔聚苯并噻二唑-Bi2MoO6 Z型异质结
DOI：
10.1016/j.jcat.2016.11.014
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发表时间：
2017
影响因子：
7.3
通讯作者：
Chen Hao
中科院分区：
文献类型：
--
作者：
Yang Xianglong;Xiang Yonggang;Qu Yang;Ding Xing;Chen Hao
通过钯催化的Sonogashira-Hagihara交叉偶联缩聚反应，使4，7-二溴苯并[c][1，2，5]噻二唑和1，3，5-三乙炔基苯在Bi 2 MoO 6表面原位制备了新型共轭微孔聚（苯并噻二唑）-Bi 2 MoO 6（BBT-BMO）Z型异质结。表征结果表明，BBT稳定地包覆在Bi 2 MoO 6纳米片的表面，形成了C O键.与纯BBT和Bi 2 MoO 6相比，BBT-BMO复合材料在可见光下具有上级光催化降解磺胺噻唑和还原Cr（VI）的性能.根据系统的表征结果，提出了一个合理的光催化机理的直接Z-计划异质结，并进一步验证了通过OH测定。这种Z型异质结使其具有改善的可见光吸收、更大的表面积和更大的电子-空穴分离，从而有效地增强了光催化性能。该工作为共轭微孔聚合物在光催化领域的应用提供了新的思路，并为通过无金属聚合物改性构建具有增强光催化性能的Z型异质结开辟了新的途径。
A novel conjugated microporous poly (benzothiadiazole)–Bi 2 MoO 6 (BBT–BMO) Z-scheme heterojunction was fabricated in situ through a facile palladium-catalyzed Sonogashira–Hagihara cross-coupling polycondensation of 4, 7-dibromobenzo [c][1, 2, 5] thiadiazole and 1, 3, 5-triethynylbenzene on the surface of Bi 2 MoO 6. Characterization results illuminated that BBT was stably coated on the surface of Bi 2 MoO 6 nanosheets with the formation of C O bonds. This novel BBT–BMO composite exhibited superior photocatalytic performance in both sulfathiazole degradation and Cr (VI) reduction compared with pure BBT and Bi 2 MoO 6 in visible light. In line with systematic characterizations results, a reasonable photocatalytic mechanism based on direct Z-scheme heterojunction was proposed and further verified via OH determination. This Z-scheme heterojunction endowed it with improved visible light absorption, larger surface area, and greater electron–hole separation and thus efficiently enhanced the photocatalytic performance. This work provides new insight into the utilization of conjugated microporous polymers in photocatalysis and paves a new way to construct Z-scheme heterojunctions with enhanced photocatalytic performance via metal-free polymers modification.