School of Chemical and Environmental Engineering, Center of Graphene Research, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China.
Nanoscale. 2018 Oct 21;10(39):18635-18641. doi: 10.1039/c8nr06138f. Epub 2018 Sep 27.
A metallic cobalt nanoparticle-implanted 5,15-diphenyl-10,20-di(4-pyridyl) porphyrin (DPyP)/graphene oxide (GO) nanohybrid (GO-Co-DPyP) was facilely fabricated. By means of XPS, XRD, Raman spectroscopy and UV-vis spectroscopy, it was demonstrated that on implanting metallic cobalt nanoparticles (Co NPs) in the GO, stronger interaction between GO and DPyP can be achieved, which enlarged the included angle between DPyP and GO. The nanohybrid was benifical for light absorption and photo-induced electron transfer. Furthermore, photocatalytic activity for hydrogen evolution over the nanohybrid was investigated. We found that higher activity over the GO-Co-DPyP nanohybrid was obtained, which was about two times higher than that of Co implanted in the GO (GO-Co-DPyP). Combined with the results of fluorescence spectra and photoelectronic spectra, the electron transfer mechanism for hydrogen evolution was clarified. This study will provide some theoretical and experimental basis for the assembly and photocatalytic performance of GO-based composites by interfacial modification.
一种金属钴纳米粒子植入的 5,15-二苯基-10,20-二(4-吡啶基)卟啉(DPyP)/氧化石墨烯(GO)纳米杂化物(GO-Co-DPyP)被简便地制备。通过 XPS、XRD、拉曼光谱和紫外-可见光谱，证明在将金属钴纳米颗粒(Co NPs)植入 GO 中时，可以实现 GO 和 DPyP 之间更强的相互作用，从而扩大 DPyP 和 GO 之间的夹角。该纳米杂化物有利于光吸收和光致电子转移。此外，还研究了该纳米杂化物在光解水制氢方面的光催化活性。我们发现，GO-Co-DPyP 纳米杂化物具有更高的活性，约是 Co 植入 GO 中的两倍(GO-Co-DPyP)。结合荧光光谱和光电谱的结果，阐明了光解水制氢的电子转移机制。这项研究将为基于 GO 的复合材料的界面修饰的组装和光催化性能提供一些理论和实验基础。
