Zheng Minfeng, Xing Xiaowei, Zhang Yeke, Li Zenan, Yang Ting, Liu Yuqing, Kang Zhenhui
College of Textile and Clothing Engineering, Soochow University, 199 Ren'ai Road, Suzhou 215123, PR China.
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, PR China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt C):417-429. doi: 10.1016/j.jcis.2024.09.149. Epub 2024 Sep 16.
Recent progress in the co-spinning of nanofibers and semiconductor particles offers a promising strategy for the development of photocatalytic devices, solving aggregation and catalyst recovery challenges. However, composite photocatalysts based on nanofiber membranes often suffer from poor conductivity, low hydrophilicity, and easy recombination of photogenerated electron-hole pairs in the semiconductor components. Here, to tackle the aforementioned issues of ZnInS/polyacrylonitrile (ZIS/PAN) nanofiber-based catalysts, we prepared a composite carbon dots/ZnInS/polyacrylonitrile (CZP) nanofiber membrane by blending carbon dots (CDs) with ZIS/PAN using the electrospinning process. The hydrogen evolution performance of the CZP photocatalyst was significantly improved by CDs, which enhanced the hydrophilicity, increased the light absorption, facilitated the transfer of photogenerated electrons, and reduced the recombination of photogenerated electron-hole pairs. Notably, the optimal CZP photocatalyst achieved a hydrogen evolution rate of 2250 μmol gh, which is about 23 % higher than that of the nanofiber membrane without CDs and 4.55 times higher than that of ZIS particles. The present work successfully improved the CZP nanofiber membrane of photocatalytic hydrogen evolution performance, and the membrane may benefit further device development by eliminating the need for stirring and simplifying the recovery process.
纳米纤维与半导体颗粒的共纺技术最近取得的进展为光催化装置的开发提供了一种很有前景的策略，解决了团聚和催化剂回收方面的挑战。然而，基于纳米纤维膜的复合光催化剂通常存在导电性差、亲水性低以及半导体组分中光生电子 - 空穴对容易复合的问题。在此，为了解决上述基于ZnInS/聚丙烯腈（ZIS/PAN）纳米纤维的催化剂的问题，我们通过静电纺丝工艺将碳点（CDs）与ZIS/PAN共混制备了一种复合碳点/ZnInS/聚丙烯腈（CZP）纳米纤维膜。CDs显著提高了CZP光催化剂的析氢性能，增强了亲水性，增加了光吸收，促进了光生电子的转移，并减少了光生电子 - 空穴对的复合。值得注意的是，最佳的CZP光催化剂实现了2250 μmol g⁻¹ h⁻¹的析氢速率，比不含CDs的纳米纤维膜高出约23%，比ZIS颗粒高出4.55倍。本工作成功提高了CZP纳米纤维膜的光催化析氢性能，并且该膜通过消除搅拌需求和简化回收过程可能有利于进一步的器件开发。
