Zhou Xuejiao, Wang Ye, Wang Yang, Zhang Mingyi, Gao Hong, Zhang Xitian
Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150025, People's Republic of China.
Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150025, People's Republic of China.
J Hazard Mater. 2020 Apr 15;388:121759. doi: 10.1016/j.jhazmat.2019.121759. Epub 2019 Nov 25.
Ultrathin g-CN nanolayers were uniformly assembled on Au nanoparticles (NPs) decorated carbon nanofiber (CNFs) by a facile gas-solid approach. The mean thickness of g-CN shell layers on CNFs-Au supports was about 22.5 nm. The ternary system of as-prepared photocatalysts with superior uniformly core-shell nanostructures present enhanced photocatalytic properties. The rate constants (rhodamine B and KCrO) of CNFs-Au@g-CN were about 3.5 and 4.5 times of g-CN powders, respectively. While the rate of H-evolution was 2.3-fold of the physical mixture, when the loading amount of Au NPs was about 0.52 At.%. Their excellent photocatalytic activities were attributed to the advantages of their unique core-shell nanostructures and the synergy of the Au NPs as a high-efficiency electron conduction bridge and their surface plasmon resonance (SPR) effect. Moreover, the ternary systems of CNFs-Au@g-CN present the gratifying cycling stability in photocatalytic reactions due to their ultra-long core-shell nanostructures. Our work provides a novel route for designing and constructing multicomponent photocatalyst in wastewater treatment and solar energy applications.
通过一种简便的气固方法，超薄g-CN纳米层均匀地组装在装饰有金纳米颗粒（NPs）的碳纳米纤维（CNFs）上。CNFs-Au载体上g-CN壳层的平均厚度约为22.5nm。所制备的具有优异均匀核壳纳米结构的三元光催化剂体系具有增强的光催化性能。CNFs-Au@g-CN的速率常数（罗丹明B和KCrO）分别约为g-CN粉末的3.5倍和4.5倍。当金纳米颗粒的负载量约为0.52At.%时，析氢速率是物理混合物的2.3倍。它们优异的光催化活性归因于其独特的核壳纳米结构的优势以及金纳米颗粒作为高效电子传导桥及其表面等离子体共振（SPR）效应的协同作用。此外，CNFs-Au@g-CN的三元体系由于其超长的核壳纳米结构，在光催化反应中表现出令人满意的循环稳定性。我们的工作为设计和构建用于废水处理和太阳能应用的多组分光催化剂提供了一条新途径。
