The successful one pot flash combustion synthesis of ZnO nanoparticles (NPs) with a diverse LA (La@ZnO) content was achieved simply and economically. X-ray diffraction confirms the synthesis of ZnO with a hexagonal crystal system. The vibrational bands are positioned at 100, 332, 380, 438 and 583 cm⁻¹ for pure and La@ZnO NPs. FESEM images exhibit roughly spherical and oval morphologies of pure ZnO with particles size 120 nm and La@ZnO NPs with particle sizes in the 46–74 nm range. The particle size of a La doped ZnO sample increases with increase in concentration from 1.0 % to 7.5 wt.% of La. The evaluated energy gap of La doped ZnO NPs decreased from 3.220 to 3.210 eV as the concentration of La varied from 1.0–7.5 wt.% as estimated by Kubelka–Munk theory. The photocatalytic analysis of the as-synthesized ZnO nanoparticles is maximized at La (1.0 wt.%) and the mechanism of photocatalytic decolourization reaction is discussed. The results suggest that the La-doped ZnO nanoparticles can be used in optoelectronic and photocatalytic applications.

简单，经济地完成了具有不同LA（La @ ZnO）含量的ZnO纳米颗粒（NPs）的成功的一锅快速燃烧合成。X射线衍射证实了具有六方晶体体系的ZnO的合成。振动带位于100、332、380、438和583 cm ^-1处用于纯和La @ ZnO NP。FESEM图像显示了粒径为120 nm的纯ZnO和粒径在46–74 nm范围内的La @ ZnO NP的大致球形和椭圆形形态。La掺杂的ZnO样品的粒径随La的浓度从1.0％增加到7.5 wt。％而增加。随着La的浓度从1.0–7.5变化，La掺杂的ZnO NPs的能隙从3.220降低到3.210 eV。由Kubelka-Munk理论估算的重量百分比。合成后的ZnO纳米粒子的光催化分析在La（1.0 wt。％）时达到最大，并讨论了光催化脱色反应的机理。结果表明，La掺杂的ZnO纳米颗粒可用于光电和光催化应用。