Defective Bi.333(Bi6S9)Br/Bi2S3 heterostructure nanorods: Boosting the activity for efficient visible-light photocatalytic Cr(VI) reduction
Defective Bi.333(Bi6S9)Br/Bi2S3 heterostructure nanorods: Boosting the activity for efficient visible-light photocatalytic Cr(VI) reduction
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有缺陷的 Bi.333(Bi6S9)Br/Bi2S3 异质结构纳米棒：提高有效可见光光催化 Cr(VI) 还原的活性
DOI：
10.1016/j.apcatb.2020.119730
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发表时间：
2021-05
期刊：
影响因子：
--
通讯作者：
贾丽霞
中科院分区：
文献类型：
--
作者：
艾礼莉;王鲁香;徐梦姣;张苏;郭楠楠;贾殿赠;贾丽霞
设计一个直接的Z-计划系统异质结构，可以实现有效的电荷分离是非常可取的电子束。采用水热法合成了Bi. 333（Bi 6S 9）Br/Bi 2S 3异质结构纳米棒，并在可见光照射下进行了Cr（VI）的光催化还原反应，评价了其光催化性能。硫缺陷以可控的方式引入到Bi. 333（Bi 6S 9）Br/Bi 2S 3杂化纳米棒中。显微结构分析表明，Bi. 333（Bi 6S 9）Br/Bi 2S 3异质结界面由Bi. 333（Bi 6S 9）Br的（130）面和Bi 2S 3的（300）面组成。Bi. 333（Bi 6S 9）Br/Bi 2S 3杂化纳米棒的高性能归因于硫缺陷和直接Z-方案异质结构。硫缺陷可以有效地吸附和活化Cr（VI），而Bi. 333（Bi 6S 9）Br和Bi 2S 3之间的直接Z-模式机制显著提高了光生电子和空穴的分离和转移效率。这一工作为新型光催化材料的设计提供了新的思路。
The design of a direct Z-scheme system heterostructure that can achieve an effective charge separation is highly desirable for photocatalysis. Herein, Bi.333(Bi6S9)Br/Bi2S3heterostructure nanorods were synthesized by a facile hydrothermal method, and the photocatalytic reduction of Cr (VI) under visible light irradiation was conducted to evaluate their photocatalytic performance. Sulfur defects were introduced into the Bi.333(Bi6S9)Br/Bi2S3hybrid nanorods in a controlled way during the phase evolution. Microstructural analysis shows that the interface of Bi.333(Bi6S9)Br/Bi2S3heterostructure consists of (130) facet of Bi.333(Bi6S9)Br and (300) facet of Bi2S3. The high performance of the Bi.333(Bi6S9)Br/Bi2S3hybrid nanorods was ascribed to sulfur defects and direct Z-scheme heterostructure. The sulfur defects can effectively adsorb and activate Cr (VI) while a direct Z-scheme mechanism between Bi.333(Bi6S9)Br and Bi2S3significantly improved the separation and transfer efficiency of photogenerated electrons and holes. This work provides a new strategy for the design of advanced photocatalytic materials.
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