The Effects of Zinc Oxide (ZnO) Quantum Dots (QDs) Embedment on the Physicochemical Properties and Photocatalytic Activity of Titanium Dioxide (TiO2) Nanoparticles

Iqbal, Anwar and Usman, Saidu and Adam, Farook and Sreekantan, Srimala and Jasni, Normawati and Ahmad, Mohammad Norazmi (2021) The Effects of Zinc Oxide (ZnO) Quantum Dots (QDs) Embedment on the Physicochemical Properties and Photocatalytic Activity of Titanium Dioxide (TiO2) Nanoparticles. Journal of Physical Science, 32 (2). pp. 71-85. ISSN 1675-3402 E-ISSN 2180-4230

PDF Restricted to Repository staff only Download (1MB) | Request a copy

Abstract

In this study, a detailed investigation on the effect of zinc oxide (ZnO) quantum dots (QDs) embedment on the physicochemical properties of anatase titanium dioxide (TiO2) was conducted. The highly porous nanocomposite labelled as ZQT was prepared via the sol-gel assisted hydrothermal method. The powder X-ray diffraction (XRD) analysis indicates that the average crystallite size of the ZnO QDs, anatase TiO2 (TiO2 NPs) and ZQT were 4.45 nm, 9.22 nm and 11.38 nm, respectively. Photoluminescent (PL) analysis detected the presence of defects related to TiO2, oxygen vacancies and quantum confinement effect (QCE) of the ZnO QDs in ZQT. These features enhanced the photodegradation of tetracycline (TC) under 48 watt of fluorescent light irradiation when ZQT (98.0%) was used compared to TiO2 NPs (32.4%) and ZnO QDs (68.8%). The photodegradation activity was driven by O2 ●− followed by ●OH and h+.

Item Type:	Article (Journal)
Uncontrolled Keywords:	ZnO, TiO2, quantum dots, photocatalysis, and tetracycline
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Chemistry
Depositing User:	Dr Mohammad Norazmi Ahmad
Date Deposited:	23 Sep 2021 11:59
Last Modified:	23 Sep 2021 11:59
URI:	http://irep.iium.edu.my/id/eprint/92449

Actions (login required)

View Item