通过Hummers制备出氧化石墨烯（GO），以TiO₂纳米颗粒（TiO₂ NPs）和GO为原料，在NaOH碱性条件下进行水热反应，一步合成TiO₂纳米线-还原氧化石墨烯（TiO₂ NWs-RGO）复合材料。研究了TiO₂ NPs和GO的质量比对TiO₂ NWs-RGO复合材料电容性能的影响。形貌和结构表征（SEM和XRD）结果表明，通过水热反应，TiO₂ NPs转化为TiO₂ NWs，GO被还原为RGO。电化学电容性能测试（CV、GCD、交流阻抗测试和循环稳定性测试）结果表明，在电流密度为1 A/g时，TiO₂ NWs-RGO复合材料的比电容达到210 F/g，经过1 000次循环后，比容量仍保留最初的84.93%，表现出优异的循环稳定性，是一种性能优异的超级电容器电极材料。

Graphene oxide (GO) is prepared via Hummers method.TiO₂ nanowire-reduced GO (TiO₂ NWs-RGO) composite material is synthesized via one step hydrothermal reaction using TiO₂ nanoparticles (TiO₂ NPs) and GO as raw materials under alkaline condition of NaOH.Effects of the initial mass ratio of TiO₂ NPs to GO on the electrochemical properties of TiO₂ NWs-RGO are investigated in details.The morphology and structure characterization through SEM and XRD shows that TiO₂ NPs is transformed into TiO₂ NWs and GO is reduced to RGO via hydrothermal reaction.The electrochemical capacitance performance tests (CV,GCD,EIS and cyclic stability test) show that the specific capacitance of TiO₂ NWs-RGO composite material reaches 210 F·g^-1 when current density is set at 1 A·g^-1.Moreover,the nanocomposite exhibits a long-term cycle stability,remaining 84.93% of specific capacitance after 1,000 cycles at 1 A·g^-1.It suggests that it has potential as an electrode material for high-performance electrochemical supercapacitors.

朱磊(1996-),男,本科生,研究方向为纳米材料及应用,zhulei_2015@163.com