Assembly of AgI nanoparticles and ultrathin g-C3N4 nanosheets codecorated Bi2WO6 direct dual Z-scheme photocatalyst: An efficient, sustainable and heterogeneous catalyst with enhanced photocatalytic performance
Assembly of AgI nanoparticles and ultrathin g-C3N4 nanosheets codecorated Bi2WO6 direct dual Z-scheme photocatalyst: An efficient, sustainable and heterogeneous catalyst with enhanced photocatalytic performance
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AgI纳米粒子和超薄 g-C3N4 纳米片的组装 Bi2WO6 直接双 Z 型光催化剂：一种高效、可持续的非均相催化剂，具有增强的光催化性能
DOI：
10.1016/j.cej.2019.05.069
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发表时间：
2019-10
影响因子：
15.1
通讯作者：
Bo Li
中科院分区：
文献类型：
--
作者：
Wenjing Xue;Danlian Huang（黄丹莲;通讯作者）;Jing Li;Guangming Zeng;Rui Deng;Yang Yang;Sha Chen;Zhihao Li;Xiaomin Gong;Bo Li
首次采用水热法和原位沉淀法制备了一种新型的直接双Z结构g-C3 N4/Bi 2 WO 6/AgI（CBA）三元异质结光催化剂。系统的研究表明，20%AgI和60% g-C3 N4共修饰的Bi 2 WO 6具有最高的光催化性能，在60 min内对四环素的去除率达到91.13%，是纯Bi 2 WO 6的10.04倍。结果表明：（1）g-C3 N4纳米片可以作为载体分散Bi 2 WO 6和AgI纳米粒子，防止它们的团聚，（2）g-C3 N4和AgI的加入可以促进光吸收，增强光捕获能力; Bi_2 WO_6、g-C_3 N_4和AgI的紧密接触有利于光生载流子的分离和转移。进一步的分析表明，在三元异质结中，光生电子的移动路径呈现直接的双Z模式，不仅实现了光生电子-空穴对的有效空间分离，而且赋予了复合材料较强的氧化还原能力，从而提高了CBA复合材料的光降解效率。本工作为构建多组分Z型光催化体系进行环境净化提供了新的思路。
A novel direct dual Z-scheme g-C3N4/Bi2WO6/AgI (CBA) ternary heterojunction photocatalyst was fabricated through the hydrothermal reaction and a succedent in-situ precipitation route for the first time. Systematic studies showed that the 20% AgI and 60% g-C3N4co-modified Bi2WO6presented the highest photocatalytic performance, achieving 91.13% removal efficiency of tetracycline within 60 min, which was 10.04 times that of pure Bi2WO6. The enhanced photocatalytic performance mainly derived from the co-effects of Bi2WO6, g-C3N4and AgI and could be summarized as following: i) The g-C3N4nanosheets could be used as carriers for dispersion of Bi2WO6and AgI nanoparticles, preventing their agglomeration; ii) The addition of g-C3N4and AgI could promote the light absorption, resulting in the strengthened light harvesting ability; iii) The intimate contact of Bi2WO6, g-C3N4, and AgI favored the separation and transfer of photogenerated carriers. Further analysis demonstrated that the path of photogenerated electrons moved exhibited a direct dual Z-scheme pattern in ternary heterojunction, which not only fulfilled the efficient spatial separation of photogenerated electron-hole pairs but also endowed the composites with strong redox capability, thereby boosting the photodegradation efficiency of CBA composite. This work opens a new strategy to constructing multi-component Z-scheme photocatalytic system for environmental decontamination.
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影响因子：
15.1
作者：
Jo, Wan-Kuen;Natarajan, Thillai Sivakumar
通讯作者：
Natarajan, Thillai Sivakumar
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影响因子：
12.8
作者：
Huang, Danlian;Xue, Wenjing;Xu, Piao
通讯作者：
Xu, Piao
影响因子：
3.7
作者：
Zhijie Zhang;Wenzhong Wang;Erping Gao;Songmei Sun;Ling Zhang
通讯作者：
Zhijie Zhang;Wenzhong Wang;Erping Gao;Songmei Sun;Ling Zhang
以碳纳米管作为高效电子介体增强石墨氮化碳/碳纳米管/Bi2WO6三元Z型异质结的光催化活性
影响因子：
9.9
作者：
Jiang, Deli;Ma, Wanxia;Chen, Min
通讯作者：
Chen, Min
影响因子：
6.7
作者：
Wu, Xuesen;Hu, Yidong;Chen, Gang
通讯作者：
Chen, Gang