Lökçü Ersu, Can Süleyman, Anik Mustafa
Department of Metallurgical and Materials Engineering, Eskişehir Osmangazi University, Eskişehir, Turkey.
Department of Metallurgical and Materials Engineering, Bilecik Şeyh Edebali University, Bilecik, Turkey.
Turk J Chem. 2023 Mar 7;47(2):495-503. doi: 10.55730/1300-0527.3554. eCollection 2023.
In this study, a facile approach has been developed to fabricate GO/SiO nanosheets by the hydrolysis of tetraethyl orthosilicate (TEOS) in the graphene oxide (GO) solution with the assistance of the ultrasonication. The morphology and structure of the SiO/GO nanosheets were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and Raman spectroscopy. The results showed that the covalently bonded SiO nanoparticles onto the GO sheets were dense and uniform. The agglomeration of the nanosheets was prevented by the ultrasonication and the layer sizes decreased throughout the synthesis process. The size and thickness of the SiO nanoparticles were determined by the initially and externally added TEOS amounts, respectively, on the GO surface. The anode performance of the thermally reduced rGO/SiO nanosheets was also observed in the Li-ion half-cell. The reversible capacity of the synthesized TrGOSN-1.5 anode was 424 mA h g at a current density of 100 mA g.
在本研究中，已开发出一种简便方法，通过在氧化石墨烯（GO）溶液中借助超声处理使正硅酸乙酯（TEOS）水解来制备GO/SiO纳米片。通过扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外（FTIR）和拉曼光谱对SiO/GO纳米片的形貌和结构进行了表征。结果表明，共价键合在GO片上的SiO纳米颗粒致密且均匀。超声处理防止了纳米片的团聚，并且在整个合成过程中层尺寸减小。SiO纳米颗粒的尺寸和厚度分别由GO表面上最初和外部添加的TEOS量决定。在锂离子半电池中也观察到了热还原的rGO/SiO纳米片的阳极性能。在100 mA g的电流密度下，合成的TrGOSN-1.5阳极的可逆容量为424 mA h g。
