Effect of calcination temperature on ZnO/TiO2 composite in photocatalytic treatment of phenol under visible light; [Kesan pengkalsinan suhu ke atas komposit ZnO/TiO2 untuk menyingkirkan fenol melalui fotopemangkin di bawah cahaya nampak]

• Published in: Malaysian Journal of Analytical Sciences
• Main Author: Abdullah N.S.A.; So’Aib S.; Krishnan J.
• Format: Article
• Language: English
• Published: Malaysian Society of Analytical Sciences 2017
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014063599&doi=10.17576%2fmjas-2017-2101-20&partnerID=40&md5=096a4ac62a2ee29c772b74acd54fe9e2

Composite catalyst ZnO/TiO2 of molar ratio 0.75% was synthesized via sol gel method. The effect of preparation method on the crystal morphology was investigated. The catalyst particles were calcinated at 500 °C, 550 °C and 600 °C for 3 hours. The XRD results revealed that calcination temperature controls the crystalline phase in terms of homogeneity and surface area of catalyst produced. The particle size was found to increase with calcination temperature suggesting the effect of different calcination temperatures on catalytic activity for complete degradation of phenol. The result found that ZnO/TiO2 catalyst calcinated at 600 °C resulted in 70% phenol degradation within five hours of irradiation time under visible light. The kinetic behavior of phenol degradation was found to fit with pseudo first order Langmuir-Hinshelwood kinetic model. © 2017, Malaysian Society of Analytical Sciences. All rights reserved.