ABSTRACT

In this study, one-dimensional zinc (Zn)-doped cadmium sulphide (CdS) nanowires were synthesised by a solvothermal method. The Zn doping concentrations were varied from 1 to 5 mol% (Zn_xCd_1−xS where x = 0.001, 0.003 and 0.005). As-prepared materials were characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy and UV–visible spectroscopy. Electrochemical impedance spectroscopy (EIS) was conducted to measure the charge transfer resistance. The photocatalytic performance of prepared materials was evaluated by the photodegradation of methylene blue (MB) dye. The result showed that 5% Zn-doped CdS is more photoactive as compared to other corresponding doped and undoped CdS. The increase in photocatalytic performance is due to improvement in the charge separation.

摘要

在这项研究中，通过溶剂热法合成了一维锌 (Zn) 掺杂的硫化镉 (CdS) 纳米线。Zn 掺杂浓度在 1 到 5 mol% 之间变化（Zn _x Cd _{1− x} S 其中x = 0.001、0.003 和 0.005）。所制备的材料通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、能量色散 X 射线 (EDX) 光谱和紫外-可见光谱进行表征。进行电化学阻抗谱（EIS）以测量电荷转移电阻。通过亚甲基蓝 (MB) 染料的光降解来评价制备材料的光催化性能。结果表明，与其他相应的掺杂和未掺杂的 CdS 相比，5% Zn 掺杂的 CdS 具有更高的光活性。光催化性能的提高是由于电荷分离的改善。