Enhanced photodegradation of phenol by ZnO nanoparticles synthesized through sol-gel method

Nikathirah Yusoff, and Ho, Li-Ngee and Ong, Soon-An and Wong, Yee-Shian and Wanfadhilah Khalik, and Muhammad Fahmi Ridzwan, (2017) Enhanced photodegradation of phenol by ZnO nanoparticles synthesized through sol-gel method. Sains Malaysiana, 46 (12). pp. 2507-2514. ISSN 0126-6039


Official URL: http://www.ukm.my/jsm/english_journals/vol46num12_...


Zinc oxide (ZnO) utilization in advanced oxidation process (AOP) via solar-photocatalytic process was a promising method for alternative treating wastewater containing phenol. The ZnO photocatalyst semiconductor was synthesized by sol-gel method. The morphology of the ZnO nanostructures was observed by using scanning electron microscope (SEM) and the crystallite phase of the ZnO was confirmed by x-ray diffraction (XRD). The objective of this study was to synthesis ZnO nanoparticles through a sol-gel method for application as a photocatalyst in the photodegradation of phenol under solar light irradiation. The photodegradation rate of phenol increased with the increasing of ZnO loading from 0.2 until 1.0 g. Only 2 h were required for synthesized ZnO to fully degrade the phenol. The synthesized ZnO are capable to totally degrade high initial concentration up until 45 mg L-1 within 6 h of reaction time. The photodegradation of phenol by ZnO are most favoured under the acidic condition (pH3) where the 100% removal achieved after 2 h of reaction. The mineralization of phenol was monitored through chemical oxygen demand (COD) reduction and 92.6% or removal was achieved. This study distinctly utilized natural sunlight as the sole sources of irradiation which safe, inexpensive; to initiate the photocatalyst for degradation of phenol.

Item Type:Article
Keywords:Phenol; Photocatalyst; Photocatalytic; Sol-gel; Zinc oxide
Journal:Sains Malaysiana
ID Code:11720
Deposited By: ms aida -
Deposited On:23 May 2018 07:31
Last Modified:30 May 2018 00:31

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