Alhassan Sultan, Alshammari Alhulw H, Alotibi Satam, Alshammari Khulaif, Mohamed W S, Hadia N M A
Department of Physics, College of Science, Jouf University, Sakaka 72341, Saudi Arabia.
Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia.
Nanomaterials (Basel). 2024 Oct 3;14(19):1599. doi: 10.3390/nano14191599.
In this study, undoped and Ni-doped ZnS nanoparticles were fabricated using a hydrothermal method to explore their structural, optical, and surface properties. X-ray diffraction (XRD) analysis confirmed the cubic crystal structure of ZnS, with the successful incorporation of Ni ions at various doping levels (2%, 4%, 6%, and 8%) without disrupting the overall lattice configuration. The average particle size for undoped ZnS was found to be 5.27 nm, while the Ni-doped samples exhibited sizes ranging from 5.45 nm to 5.83 nm, with the largest size observed at 6% Ni doping before a reduction at higher concentrations. Fourier-transform infrared (FTIR) spectroscopy identified characteristic Zn-S vibrational bands, with shifts indicating successful Ni incorporation into the ZnS lattice. UV-visible spectroscopy revealed a decrease in the optical band gap from 3.72 eV for undoped ZnS to 3.54 eV for 6% Ni-doped ZnS, demonstrating tunable optical properties due to Ni doping, which could enhance photocatalytic performance under visible light. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) analyses confirmed the uniform distribution of Ni within the ZnS matrix, while X-ray photoelectron spectroscopy (XPS) provided further confirmation of the chemical states of the elements. Ni doping of ZnS nanoparticles alters the surface area and pore structure, optimizing the material's textural properties for enhanced performance. These findings suggest that Ni-doped ZnS nanoparticles offer promising potential for applications in photocatalysis, optoelectronics, and other fields requiring specific band gap tuning and particle size control.
在本研究中，采用水热法制备了未掺杂和镍掺杂的硫化锌纳米颗粒，以探究其结构、光学和表面性质。X射线衍射（XRD）分析证实了硫化锌的立方晶体结构，在不同掺杂水平（2%、4%、6%和8%）下成功掺入镍离子，且未破坏整体晶格构型。未掺杂硫化锌的平均粒径为5.27nm，而镍掺杂样品的粒径范围为5.45nm至5.83nm，在6%镍掺杂时观察到最大粒径，之后在更高浓度下粒径减小。傅里叶变换红外（FTIR）光谱确定了特征性的Zn-S振动带，其位移表明镍成功掺入硫化锌晶格。紫外-可见光谱显示，光学带隙从未掺杂硫化锌的3.72eV降至6%镍掺杂硫化锌的3.54eV，表明镍掺杂导致光学性质可调，这可增强可见光下的光催化性能。扫描电子显微镜（SEM）和能量色散X射线光谱（EDX）分析证实了镍在硫化锌基质中的均匀分布，而X射线光电子能谱（XPS）进一步证实了元素的化学状态。硫化锌纳米颗粒的镍掺杂改变了表面积和孔结构，优化了材料的结构性质以提高性能。这些发现表明，镍掺杂的硫化锌纳米颗粒在光催化、光电子学及其他需要特定带隙调节和粒径控制的领域具有广阔的应用前景。
