Carbon-based systems have been discussed as prospective alternatives for conventional metal-based catalysts over the past decade. These studies were motivated by the abundance, low cost, lightweight and diversity of structural allotropes of carbon. We reported here the synthesis of a new type of unzipped multiwalled carbon nanotubes/titanium dioxide (UzMWCNT/TiO2) nanocomposite by the two-stage procedure. By the modified Hummers method, multiwalled carbon nanotubes (MWCNTs) were converted to oxidized multi-walled carbon nanotubes (O-MWCNT). Then, through a facile ultrasound-assisted route prepared UzMWCNT/TiO2 nanocomposite. For this, the oxidized multiwalled carbon nanotubes are treated with TiCl4 under an ultrasonic probe for 3 h to generate UzMWCNT/TiO2 and then explored its environmental friendliness and energy applications as a supercapacitor. This novel UzMWCNT/TiO2 nanocomposite was characterized using XRD, TGA, FT-IR, Raman, TEM and EDX analysis. The electrochemical performance can be evaluated by using cyclic voltammetry (CV) and galvanostatic charging-discharging (GCD) study. Finally, the electrodes prepared using UzMWCNT/TiO2 nanocomposite have been analyzed through electrochemical impedance spectroscopy (EIS) to probe the charge transfer characteristics and the results are consistent with other electrochemical measurements.

中文翻译：

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超声辅助合成未压缩的多壁碳纳米管/二氧化钛纳米复合材料，是有希望的下一代储能材料。

在过去的十年中，已经讨论了碳基体系作为常规金属基催化剂的替代方法。这些研究的动机是碳的同素异形体含量高，成本低，重量轻和多样性。我们在这里报道了通过两步法合成新型的未压缩多壁碳纳米管/二氧化钛（UzMWCNT / TiO2）纳米复合材料。通过改进的Hummers方法，将多壁碳纳米管（MWCNT）转换为氧化多壁碳纳米管（O-MWCNT）。然后，通过简便的超声辅助方法制备了UzMWCNT / TiO2纳米复合材料。为此，将氧化的多壁碳纳米管在超声波探头下用TiCl4处理3小时以生成UzMWCNT / TiO2，然后探索其作为超级电容器的环境友好性和能源应用。使用XRD，TGA，FT-IR，拉曼，TEM和EDX分析对这种新型的UzMWCNT / TiO2纳米复合材料进行了表征。电化学性能可以通过循环伏安法（CV）和恒电流充放电（GCD）研究来评估。最后，通过电化学阻抗谱（EIS）分析了使用UzMWCNT / TiO2纳米复合材料制备的电极，以探测电荷转移特性，其结果与其他电化学测量结果一致。