Revealing the size effect of metallic CoS2 on CdS nanorods for photocatalytic hydrogen evolution based on Schottky junction
Revealing the size effect of metallic CoS2 on CdS nanorods for photocatalytic hydrogen evolution based on Schottky junction
复制标题
揭示金属CoS2对CdS纳米棒的尺寸效应，用于基于肖特基结的光催化析氢
DOI：
10.1016/j.apcata.2019.117377
复制
发表时间：
2020-02
期刊：
影响因子：
--
通讯作者：
Jing Tang
中科院分区：
文献类型：
--
作者：
Bing Qing Qiu;Chen Xi Li;Xia Qiang Shen;Wei Li Wang;He Ren;Yi Li;Jing Tang
通过控制贵金属共催化剂的尺寸来实现半导体的高效光催化已经得到了广泛的应用。然而，金属材料作为一种新型的助催化剂，在这一过程中是否有尺寸效应尚不清楚。本研究以十六烷基十六烷基三甲基溴化铵（CTAB）为表面活性剂，采用易水热法制备了不同负载和尺寸的CoS2/CdS纳米棒复合材料。作为共催化剂的金属cos2纳米颗粒（NPs）的尺寸可以控制在~ 9 nm ~ ~ 45 nm之间，并探讨了CoS2NPs的尺寸效应对氢的光催化演化的影响。由于CdS和CoS2的功函数差异最大，CoS2/CdS NR纳米复合材料（CoS2NPs为~ 9 nm）的光催化制氢速率是原始CdS NRs的13倍。实验和DFT计算结果表明，通过CoS2NPs和CdS NRs之间的肖特基结，CdS NRs上的电子有效分离和转移。进一步验证了金属材料的尺寸效应，这对提高半导体的光催化活性具有重要意义。
The highly efficient photocatalysis of semiconductors by controlling the size of noble metal co-catalysts has been widely used. However, it is unknown whether metallic materials, as a new type of co-catalyst, have a size effect in this process. In this study, by using CTAB (hexadecylcetyltrimethyl-ammonium bromide) as a surfactant, nanocomposites of CoS2/CdS nanorods (NRs) with different loads and sizes of CoS2were fabricated by using the facile hydrothermal method. The size of the metallic CoS2nanoparticles (NPs) as co-catalysts could be controlled from ∼ 9 nm to ∼ 45 nm, and the size effect of CoS2NPs was explored for the photocatalytic evolution of hydrogen. The rate of production of photocatalytic hydrogen of 0.5 % CoS2/CdS NR nanocomposites, with ∼ 9 nm CoS2NPs, was 13 times that of the pristine CdS NRs owing to the maximum difference in work function between CdS and CoS2. The results of experiments and DFT calculations show the effective electron separation and transfer on the CdS NRs through the Schottky junction between CoS2NPs and CdS NRs. Furthermore, the size effect of metallic materials was verified, which is significant for enhancing the photocatalytic activity of semiconductors.
登录
查看更多内容
影响因子：
3.7
作者：
Zhenyi Zhang;Z. Wang;Shaowen Cao;Can Xue
通讯作者：
Zhenyi Zhang;Z. Wang;Shaowen Cao;Can Xue
影响因子：
15
作者：
Subramanian, V;Wolf, EE;Kamat, PV
通讯作者：
Kamat, PV
影响因子：
12.9
作者：
M. Zhukovskyi;Pornthip Tongying;H. Yashan;Yuanxing Wang;M. Kuno
通讯作者：
M. Zhukovskyi;Pornthip Tongying;H. Yashan;Yuanxing Wang;M. Kuno
Cu-N 掺杂剂促进碳点的电子转移和光氧化反应
影响因子：
16.6
作者：
Wu, Wenting;Zhan, Liying;Zeng, Haibo
通讯作者：
Zeng, Haibo
嵌入还原氧化石墨烯的 CoS2 纳米晶体的微波吸收特性
影响因子：
9.5
作者：
Can Zhang;Bochong Wang;Jianyong Xiang;Can Su;Congpu Mu;Fusheng Wen;Zhongyuan Liu
通讯作者：
Zhongyuan Liu