Samarium doped ZnO (Sm-ZnO) nanocolumns were grown by wet chemical method and the doping effect of Sm³⁺ on visible light photocatalytic (PC) and photoluminescence (PL) properties of ZnO was investigated. Methylene blue (MB) and methyl orange (MO) were considered for the degradation study as a step initiated towards the remediation of industrial wastewater. Subsequent characterization studies by x-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) enumerate that the hexagonal-wurtzite structured Sm-ZnO is highly crystalline in nature and possesses hexagonal column like nano-architectures. Although, a charge imbalance exists between the ions, the substitutional effects of Sm³⁺ at Zn²⁺ sites have been observed from the XRD spectra and discussed by suitable mechanisms. FTIR measurement gives the information on the evolution of peaks related to metal-oxygen bond in Sm-ZnO which may be linked with Sm ions. PC measurement shows that the degradation efficiency of 95% can be achieved by Sm-ZnO photocatalysts in degrading MB and 91% for MO. Sm doping induces high charge separation efficiency and generation of OH ions in ZnO leading to such improvisation in degradation efficiency. The prepared Sm-ZnO nanocatalysts possess high degree of photostability and reusability even after fourth cycle of photodegradation. PL spectra show the suppression of the sharp and intense excitonic emission band of ZnO in Sm-ZnO due to low rated direct recombination of carriers. Incorporation of Sm³⁺ ends up with intrinsic defect mediated enhancement in the visible emissions especially in the blue, yellow and red region of light spectrum.

通过湿化学法生长了掺do的ZnO（Sm-ZnO）纳米柱，研究了Sm ³⁺的掺杂对ZnO可见光光催化（PC）和光致发光（PL）性能的影响。考虑将亚甲基蓝（MB）和甲基橙（MO）用于降解研究，这是朝着修复工业废水迈出的一步。随后通过X射线衍射（XRD）和场发射扫描电子显微镜（FESEM）进行的表征研究表明，六方纤锌矿结构的Sm-ZnO本质上是高度结晶的，并具有类似于纳米结构的六方柱。尽管离子之间存在电荷不平衡，但是Sm ³⁺在Zn ²⁺处的取代作用从XRD光谱观察到这些位点，并通过适当的机制进行了讨论。FTIR测量可提供有关与Sm离子相连的Sm-ZnO中与金属-氧键有关的峰的演变的信息。PC测量表明，Sm-ZnO光催化剂降解MB可以达到95％的降解效率，而MO可以达到91％的降解效率。Sm掺杂引起高电荷分离效率，并在ZnO中产生OH离子，从而导致降解效率的改善。所制备的Sm-ZnO纳米催化剂甚至在第四次光降解循环后仍具有高度的光稳定性和可重复使用性。PL谱显示出由于低额定载流子的直接重组而抑制了Sm-ZnO中ZnO的尖锐和强烈的激子发射带。掺入Sm ³⁺ 最终导致固有缺陷介导的可见光发射增强，尤其是在光谱的蓝色，黄色和红色区域。