Universiti Teknologi Malaysia Institutional Repository

Preparation of highly active zinc oxide for photocatalytic removal of phenol: direct calcination versus co-precipitation method

Lee, Siew Ling and Lintang, Hendrik Oktendy and Leny Yuliati, Leny Yuliati and Hussin, Faisal (2015) Preparation of highly active zinc oxide for photocatalytic removal of phenol: direct calcination versus co-precipitation method. Malaysian Journal Of Fundamental And Applied Sciences, 11 (3). pp. 134-138. ISSN 2289-5981

[img]
Preview
PDF
293kB

Official URL: http://dx.doi.org/10.11113/mjfas.v11n3.384

Abstract

Photocatalytic removal of phenol under UV light irradiation was studied on zinc oxide (ZnO) photocatalysts, which were prepared via direct calcination (DC), and co-precipitation (CP) methods. The XRD patterns revealed that all of the prepared ZnO samples showed wurtzite structure, in which the ZnO-CP showed higher intensity of the diffraction peaks than the ZnO-DC sample. Optical and fluorescence properties of the prepared ZnO samples were similar to each other as confirmed by DR UV-Vis and fluorescence spectroscopy, respectively. The Stern-Volmer plot was investigated to study the interactions between the emission sites and the phenol. It was obtained that the emission sites of the ZnO-CP gave better interactions towards phenol molecules as compared to the ZnO-DC. After 6 hours reaction under UV light irradiation, the ZnO-CP sample showed two times higher photocatalytic activity for removal of phenol (10%) than that of the ZnO-DC (5%). It was suggested that the high activity observed on the ZnO-CP sample would be due to high crystallinity and good interactions with phenol. These results clearly suggested that the co-precipitation method was a good approach to prepare the highly active ZnO for the photocatalytic removal of phenol.

Item Type:Article
Uncontrolled Keywords:ZnO, co-precipitation, UV-light irradiation
Subjects:Q Science > QD Chemistry
Divisions:Science
ID Code:60384
Deposited By: Haliza Zainal
Deposited On:24 Jan 2017 02:54
Last Modified:22 Aug 2021 08:12

Repository Staff Only: item control page