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以三氧化钼和硫氰酸铵为起始原料,采用温和的水热法制备了MoS2纳米花。考察了反应温度(160~200℃)和反应时间(12~48h)对MoS2纳米花电极化学性能的影响。利用X射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)和N2吸附-脱附曲线(BET)对样品的晶型、形貌、组分和比表面积进行了表征。结果表明,所制备的样品呈现出了花瓣状的片层结构,并有序堆垛成花状纳米球,且具有较大的比表面积(23.13m2·g-1)。循环伏安测试表明,MoS2电极的催化活性优于铂电极。光电化学性能测试表明,基于MoS2对电极的染料敏化太阳能电池(DSSCs)的光电转换效率(2.44%)高于铂电极(2.33%),有望在染料敏化太阳能电池(DSSCs)电极材料方面得到应用。
MoS2 nanoflowers were prepared by mild hydrothermal method using molybdenum trioxide and ammonium thiocyanate as starting materials. The effects of reaction temperature (160 ~ 200 ℃) and reaction time (12 ~ 48h) on the chemical properties of MoS2 nano-flower were investigated. The crystal form, morphology, composition and specific surface area of the samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and N2 adsorption-desorption curve (BET) The results showed that the prepared samples showed the petaloid lamellar structure and were ordered into flower-like nanospheres with larger specific surface area (23.13m2 · g-1). Cyclic voltammetry tests showed that the catalytic activity of MoS2 electrode was better than platinum electrode. Photoelectrochemical tests show that the photoelectric conversion efficiency (2.44%) of the dye-sensitized solar cells (DSSCs) based on MoS2 is higher than that of the platinum electrode (2.33%), which is expected to be obtained in the dye sensitized solar cell (DSSCs) application.