Semiconductor photocatalysts with better photocatalytic properties have been widely researched to be an alternative for dye removal application with better photocatalytic properties. In the present work, Al-doped ZnO which act as a photocatalysts was prepared by modified sol-gel technique at different Al concentrations to evaluate the effect of different Al doping concentration towards the photocatalytic degradation performance of methyl orange dye. The crystallinity of Al-doped ZnO was analysed by X-ray diffraction (XRD) at room temperature. The structural properties, surface morphology and elemental composition were studied via scanning electron microscope (SEM) attached with energy dispersive X-ray spectroscopy (EDS). From XRD, all Al-doped ZnO samples show a polycrystalline nature with a hexagonal wurtzite structure. The average crystallite size was determined by Scherrer’s equation in the range of 79.29–86.50 nm. The Al ion was successfully incorporated into the Zn lattice confirmed by (101) peak shifting from the XRD results. The photocatalytic activities have been carried out by irradiating the photocatalysts under ultraviolet (UV) irradiation. The 1 mol% Al-doped ZnO exhibited a significant increase in the percentage degradation and photocatalytic efficiency compared to others with value of 88.87% degradation and rate constant k of 3.45 × 10⁻² min⁻¹ under 60 min irradiation. In the present work, Al-doped ZnO could be reused minimum of five cycles in its recyclability reaction.

具有更好的光催化性能的半导体光催化剂已被广泛研究为具有更好的光催化性能的染料去除应用的替代方法。在本工作中，通过改进的溶胶-凝胶技术在不同的Al浓度下制备了Al掺杂的ZnO，研究了不同Al掺杂浓度对甲基橙染料光催化降解性能的影响。在室温下通过X射线衍射（XRD）分析了Al掺杂的ZnO的结晶度。通过附有能量色散X射线光谱仪（EDS）的扫描电子显微镜（SEM）研究了结构性能，表面形态和元素组成。根据XRD，所有Al掺杂的ZnO样品均显示具有六方纤锌矿结构的多晶性质。平均晶体尺寸由Scherrer方程确定，范围为79.29–86.50 nm。通过XRD结果的（101）峰移动证实了Al离子已成功掺入Zn晶格中。通过在紫外线（UV）照射下照射光催化剂来进行光催化活性。1 mol％的Al掺杂ZnO的降解率和光催化效率显着提高，其降解率为88.87％，速率常数恒定在60分钟的照射下k为3.45×10 ^-2  min ^-1。在目前的工作中，掺铝的ZnO在其可循环性反应中至少可以重复使用五个循环。