Nanomaterials and Solar Energy Conversion Lab, Department of Chemistry, National Institute of Technology, Tiruchirappalli, 620 015, India.
Department of Environmental Engineering and Science, Feng Chia University, Taichung 407, Taiwan.
Ultrason Sonochem. 2016 Mar;29:205-12. doi: 10.1016/j.ultsonch.2015.09.013. Epub 2015 Sep 25.
Multiwalled carbon nanotubes (MWCNTs) and Vulcan carbon (VC) decorated with SnO2 nanoparticles were synthesized using a facile and versatile sonochemical procedure. The as-prepared nanocomposites were characterized by means of transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transform infra red spectroscopy. It was evidenced that SnO2 nanoparticles were uniformly distributed on both carbon surfaces, tightly decorating the MWCNTs and VC. The electrochemical performance of the nanocomposites was evaluated by cyclic voltammetry and galvanostatic charge/discharge cycling. The as-synthesized SnO2/MWCNTs nanocomposites show a higher capacity than the SnO2/VC nanocomposites. Concretely, the SnO2/MWCNTs electrodes exhibit a specific capacitance of 133.33 F g(-1), whereas SnO2/VC electrodes exhibit a specific capacitance of 112.14 F g(-1) measured at 0.5 mA cm(-2) in 1 M Na2SO4.
多壁碳纳米管（MWCNTs）和 Vulcan 碳（VC）用 SnO2 纳米粒子修饰，通过简便通用的超声化学法合成。通过透射电子显微镜、X 射线衍射、X 射线光电子能谱和傅里叶变换红外光谱对所制备的纳米复合材料进行了表征。结果表明，SnO2 纳米粒子均匀分布在碳表面上，紧密地修饰 MWCNTs 和 VC。通过循环伏安法和恒电流充放电循环评估了纳米复合材料的电化学性能。所合成的 SnO2/MWCNTs 纳米复合材料的容量高于 SnO2/VC 纳米复合材料。具体而言，SnO2/MWCNTs 电极在 1 M Na2SO4 中以 0.5 mA cm(-2)的电流密度测量时，具有 133.33 F g(-1)的比电容，而 SnO2/VC 电极具有 112.14 F g(-1)的比电容。
