Tuning the bandgap in Co-doped Mg(OH)2 nanoparticles

被引：12

作者：

Raza, Syed Masood ^{[1
,2
]}

Ali, S. Rizwan ^{[1
,2
]}

Naeem, M. ^{[1
,2
]}

Uddin, Zaheer ^{[2
]}

Qaseem, Sadaf ^{[1
]}

Ali, S. Imran ^{[3
]}

Shah, S. Naseem ^{[1
]}

机构：

[1] Fed Urdu Univ Karachi, Dept Phys, Karachi, Pakistan

[2] Univ Karachi, Dept Phys, Karachi, Pakistan

[3] Univ Karachi, Dept Appl Chem & Chem Technol, Karachi, Pakistan

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2019年 / 33卷 / 17期

关键词：

Magnesium hydroxide; nanoparticles; morphology; optical properties; bandgap; MAGNESIUM-HYDROXIDE NANOPARTICLES; HYDROTHERMAL SYNTHESIS; OPTICAL-PROPERTIES; ZNO NANOPARTICLES; THIN-FILMS; MGO; NANOSTRUCTURES; GROWTH;

D O I：

10.1142/S0217979219501820

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Cobalt (Co) doped magnesium hydroxide Mg(OH)(2) nanoparticles are synthesized by a surfactant-free co-participation method. Scanning electron microscopy (SEM) images show nanometer size Mg(OH)(2) particles in spherically shaped particle-like morphology. Synthesis of these Mg(OH)(2) nanocrystals involves the formation of monomeric MgOH+ ions as the precursor for the Mg(OH)(2) nuclei which finally evolves in spherical particle-like morphology. X-ray diffraction (XRD) confirms the hexagonal crystal structure of the samples. With increasing Co concentration, the absorption spectra of the samples show narrowing of the bandgap from 5.47 eV (for pure Mg(OH2)) to 5.26 eV (for 10% Co-doped Mg(OH2)) effect is attributed to changes in the interaction potentials between Co and the host Mg(OH)(2) lattice due to dopant-induced lattice distortion and the presence of a mixed valance Co2+/Co3+ state.

引用

页数：11

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