Role of Gd3+ and Ho3+ doping on the structure, physical properties and applications of ZnO

被引：0
|
作者：
M. M. Arman
Alaa AL-Rahman Gamal
机构：
[1] Cairo University,Materials Science Lab (1), Physics Department, Faculty of Science
[2] Ain Shams University,Biophysics Group, Physics Department, Faculty of Science
来源：
Applied Physics A | 2023年 / 129卷
关键词：
ZnO; Zn; Gd; O; Zn; Ho; O; The removal efficiency; Nanoparticles;
D O I：
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学科分类号：
摘要：
ZnO, Zn0.97Gd0.03O and Zn0.97Ho0.03O were prepared via a citrate auto-combustion method. X-ray diffraction (XRD) demonstrated that the investigated nanoparticles were prepared in a hexagonal structure, with crystallite sizes averaging between 12 and 60 nm. The morphology of the samples is illustrated by the field emission scanning electron microscope (FESEM) images. The paramagnetic behavior of the investigated nanoparticles is demonstrated by VSM. The value of the optical band gap (Eg) of Zn0.97Gd0.03O was higher than the Eg of ZnO due to the Moss–Burstein effect. Heavy metal Cd2+ ions from water are effectively adsorbed by rare earth-doped ZnO. At pH = 8, Zn0.97Ho0.03O exhibits a maximum removal efficiency of 91%. The Freundlich isotherm model fits the experimental results well.
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