Wang Aijian, Shen Xiaoliang, Wang Qi, Cheng Laixiang, Zhu Weihua, Shang Danhong, Song Yinglin
School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China.
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212013, PR China.
Dalton Trans. 2021 May 25;50(20):7007-7016. doi: 10.1039/d1dt00756d.
Herein, we report a novel graphene oxide (GO) nanohybrid covalently functionalized by covalent organic polymer (COP) based on porphyrin (GO-TPPCOP), as the optical limiter and hydrogen evolution reaction (HER) electrocatalyst. The GO-TPPCOP nanohybrid exhibits markedly enhanced optical limiting and HER activity over that of TPP, GO and TPPCOP alone. More importantly, the optical limiting property and HER activity of GO-TPPCOP nanohybrid are comparable to the state-of-the-art activity of materials from some previous reports. The possible mechanisms of optical limiting and HER are explored by various means, including UV-Vis absorption, fluorescence, photocurrent, electrochemical impedance spectra and Raman spectroscopic techniques. It is demonstrated that the synergistic effect and charge transfer between GO and TPPCOP are important factors in determining its optical limiting and HER performances. These results demonstrate a new strategy to design and develop functional nanohybrids for efficient optical limiting and HER activity by the covalent linkage of GO with COPs.
在此，我们报道了一种基于卟啉的共价有机聚合物（COP）共价功能化的新型氧化石墨烯（GO）纳米杂化物（GO-TPPCOP），作为光学限幅器和析氢反应（HER）电催化剂。与单独的TPP、GO和TPPCOP相比，GO-TPPCOP纳米杂化物表现出显著增强的光学限幅和HER活性。更重要的是，GO-TPPCOP纳米杂化物的光学限幅性能和HER活性与先前一些报道中的材料的最先进活性相当。通过各种手段，包括紫外可见吸收、荧光、光电流、电化学阻抗谱和拉曼光谱技术，探索了光学限幅和HER的可能机制。结果表明，GO和TPPCOP之间的协同效应和电荷转移是决定其光学限幅和HER性能的重要因素。这些结果展示了一种通过GO与COPs的共价连接来设计和开发用于高效光学限幅和HER活性的功能性纳米杂化物的新策略。
