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PAPER ARUP_261119.doc (3.75 MB)

Zn Doping Induced Band Gap Widening of Ag2O Nanoparticles

preprint
submitted on 26.11.2019, 11:53 and posted on 02.12.2019, 07:27 by Arup Kumar De, Sourav Majumdar, Shaili Pal, Sunil Kumar, Indrajit Sinha

The present investigation widens the narrow bandgap of Ag2O to make it a semiconductor with more attractive properties. A typical hydrothermal synthesis procedure was used to prepare Zn doped Ag2O nanoparticles. The X-ray diffraction analysis of the prepared powder samples showed that the lattice parameters of Ag2O increase with doping, indicating the occupation of interstitial positions by the dopant atoms. Density functional theory calculations also demonstrated the expansion of the Ag2O crystal lattice with the dopant at an interstitial location. The bandgap of the Ag2O increases to 1.65 eV for 5-mole percent doping. The doped Ag2O nanoparticles photocatalytically degrade methyl orange under aerobic visible light conditions. It appears that the rise in the percentage of higher valence Zn doping converts the originally p-type to an n-type semiconductor.

History

Email Address of Submitting Author

isinha.apc@itbhu.ac.in

Institution

Indian Institute of Technology (Banaras Hindu University) Varanasi

Country

India

ORCID For Submitting Author

0000-0001-6520-8273

Declaration of Conflict of Interest

There is no conflict of interest to declare.

Version Notes

Version 1.0

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in Journal of Alloys and Compounds

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