Open AccessImproving the Sonocatalytic Degradation of Caffeine by Organic Acids Treatment for Surface Modification of Ag/CeO2
Author(s) -
A. K. Nur Fadzeelah,
Anas Abdullah,
N. A. Azha
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/864/1/012025
Subject(s) - oxalic acid , ascorbic acid , catalysis , citric acid , degradation (telecommunications) , caffeine , nuclear chemistry , surface modification , chemistry , organic acid , hydrothermal circulation , inorganic chemistry , materials science , chemical engineering , organic chemistry , food science , medicine , telecommunications , computer science , engineering , endocrinology
In this work, the surface of Ag/CeO 2 which was prepared using hydrothermal method was modified using three types of organic acid such as ascorbic acid, citric acid and oxalic acid as the post treatment of as-synthesized Ag/CeO 2 catalyst. The modified catalyst was further characterized using energy dispersive X-ray (EDX) for its elemental composition and BET surface area. The sonocatalytic degradation of caffeine under ultrasonic irradiation was examined to investigate the effect of these organic acids on the modification of Ag/CeO 2 catalyst. The result showed that ascorbic acid demonstrated the highest sonocatalytic degradation of caffeine compared to citric and oxalic acids. Meanwhile, the degradation of caffeine was improved from 72.8% to 78.9% for modified Ag/CeO 2 catalyst using ascorbic acid as the surface modifier. Thus, this result indicates that this kind of organic acid might have potential to modify Ag/CeO 2 catalyst surface and improve the sonocatalytic degradation of caffeine.