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首页> 外文期刊>RSC Advances >Influence of growth temperature on titanium sulphide nanostructures: from trisulphide nanosheets and nanoribbons to disulphide nanodiscs
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Influence of growth temperature on titanium sulphide nanostructures: from trisulphide nanosheets and nanoribbons to disulphide nanodiscs

机译：生长温度对硫化钛纳米结构的影响：从三硫化物纳米片和纳米带到二硫化物纳米盘

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We report the fabrication and characterization of titanium sulphide nanostructures using a chemical vapour transport (CVT) method. In CVT, reactions occur between titanium and sulphur powder in the vapor phase for TiS _( x ) nanostructure growth. Systematic studies on the effect of temperature, consequent structural evolution and optical properties were investigated by various characterization techniques. A series of experiments were performed by maintaining a fixed compositional ratio (1?:?3) of Ti and S within a temperature range from 400 °C to 650 °C. On increasing the temperature from 400 °C to 650 °C; a gradual change in morphology was obtained from nanosheets (NS) to mixed phase nanoribbons and nanosheets (NS: NR), nanoribbons (NR), and nanodiscs (ND) of titanium sulphide, which was confirmed using SEM/TEM analysis. Then, the composition of titanium sulphides was studied using XRD, EDX and Raman spectroscopic techniques and it is observed that NS, NR and NS: NR have the composition ratio of TiS _(3) whereas ND has a ratio of TiS _(2) . The phenomenon of decomposition of TiS _(3) into TiS _(2) at elevated temperatures was explained using thermogravimetric analysis (TGA) and differential thermal analysis (DTA) along with pictorial representations. The optical properties of the prepared TiS _(3) /TiS _(2) nanostructures were studied using UV-vis and photoluminescence spectroscopy. It is concluded that composition ratio of Ti and S as well as the temperature variation plays a crucial role in the formation of different Ti–S nanostructures with unique optical, electronic and thermal properties.
机译：我们报告了使用化学气相传输（CVT）方法制造和表征的硫化钛纳米结构。在CVT中，钛和硫粉末在气相中发生反应，从而生成TiS _（x）纳米结构。通过各种表征技术对温度，随之产生的结构演变和光学性质的影响进行了系统研究。通过在400℃至650℃的温度范围内保持固定的Ti和S的组成比（1∶∶→3）来进行一系列实验。温度从400°C升至650°C时;从纳米片（NS）到混合相纳米带和纳米片（NS：NR），纳米带（NR）和纳米圆片（ND）的硫化钛，形态得到了逐渐变化，这已通过SEM / TEM分析得到了证实。然后，使用XRD，EDX和拉曼光谱技术研究了硫化钛的组成，发现NS，NR和NS：NR的组成比为TiS _（3），而ND的比例为TiS _（2）。 。使用热重分析（TGA）和差示热分析（DTA）以及图示说明解释了高温下TiS_（3）分解为TiS_（2）的现象。制备的TiS _（3）/ TiS _（2）纳米结构的光学性质使用紫外可见和光致发光光谱进行了研究。结论是，Ti和S的组成比以及温度变化在具有独特的光学，电子和热学性质的不同Ti-S纳米结构的形成中起着至关重要的作用。

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