Liu Jiaxing, Duan Siyao, Feng Xintao, Jiang Yinhua, Xiao Yan, Zhang Wenli, Liu Yan, Zhou Ershuai, Zhang Jianming, Liu Zhanchao
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China.
Inorg Chem. 2023 Oct 23;62(42):17241-17253. doi: 10.1021/acs.inorgchem.3c02444. Epub 2023 Oct 11.
In order to utilize the synergistic effect between a conductive polymer and an inorganic semiconductor to efficaciously enhance charge transfer and solve the problem of unsatisfactory performance of a single photocatalyst, thiophene (Th) was polymerized on the CdZnS nanoparticle surface to prepare a conductive polymer-inorganic polythiophene/CdZnS (PTh/CZS) heterostructrue through a simple in situ oxidation polymerization for the first time. The as-prepared PTh/CZS heterostructures significantly improved photocatalytic TCH degradation and hydrogen production activities. Especially, the 15PTh/CZS sample exhibited the optimal hydrogen production rate (18.45 mmol g h), which was 2.51 times higher than pure CdZnS nanoparticles. In addition, 15PTh/CZS also showed very fast and efficient photodegradation ability for degrading 88% of TCH in 25 min. Moreover, the degradation rate (0.06229 min) was five times more than that of CdZnS. The π-π* transition characteristics, high optical absorption coefficient, wide absorption wavelength of PTh, the tight contact interface, and synergistic effect of PTh and CdZnS efficiently boosted charge transfer rate and increased the light absorption of PTh/CZS photocatalysts, which greatly enhanced the photocatalytic abilities. Besides, the mechanism of improved photocatalytic activities for TCH degradation and H production was also carefully proposed. Undoubtedly, this work would provide new insights into coupling conductive polymers to inorganic photocatalysts for achieving multifunctional applications in the field of photocatalysis.
为了利用导电聚合物与无机半导体之间的协同效应来有效增强电荷转移，并解决单一光催化剂性能不理想的问题，首次通过简单的原位氧化聚合反应在CdZnS纳米颗粒表面聚合噻吩（Th），制备了导电聚合物-无机聚噻吩/CdZnS（PTh/CZS）异质结构。所制备的PTh/CZS异质结构显著提高了光催化降解三氯生（TCH）和产氢活性。特别是，15PTh/CZS样品表现出最佳产氢速率（18.45 mmol g⁻¹ h⁻¹），比纯CdZnS纳米颗粒高2.51倍。此外，15PTh/CZS在25分钟内对TCH的降解率达到88%，显示出非常快速且高效的光降解能力。而且，其降解速率（0.06229 min⁻¹）是CdZnS的五倍。PTh的π-π*跃迁特性、高光学吸收系数、宽吸收波长、紧密的接触界面以及PTh与CdZnS的协同效应有效地提高了电荷转移速率，增加了PTh/CZS光催化剂的光吸收，从而大大增强了光催化能力。此外，还详细提出了TCH降解和产氢光催化活性提高的机理。毫无疑问，这项工作将为将导电聚合物与无机光催化剂耦合以实现光催化领域的多功能应用提供新的见解。
