Preprint Article Version 1 This version not peer reviewed

Photodegradation of 1-butyl-3-methylimidazolium chloride [bmim]Cl via Synergistic Effect of Adsorption-Photodegradation of Fe-TiO2/AC

Version 1 : Received: 24 October 2017 / Approved: 24 October 2017 / Online: 24 October 2017 (11:32:13 CEST)

A peer-reviewed article of this Preprint also exists.

Zawawi, A.; Ramli, R.M.; Yub Harun, N. Photodegradation of 1-Butyl-3-methylimidazolium Chloride [Bmim]Cl via Synergistic Effect of Adsorption–Photodegradation of Fe-TiO2/AC. Technologies 2017, 5, 82. Zawawi, A.; Ramli, R.M.; Yub Harun, N. Photodegradation of 1-Butyl-3-methylimidazolium Chloride [Bmim]Cl via Synergistic Effect of Adsorption–Photodegradation of Fe-TiO2/AC. Technologies 2017, 5, 82.

Journal reference: Technologies 2017, 5, 82
DOI: 10.3390/technologies5040082

Abstract

Ionic liquids (ILs) have gained interest among researchers due to its tunable properties that can be used in wide applications. However, toxicity and bio-degradation studies of ILs proved that most of the aromatic ILs, such as imidazolium is highly toxic and non-biodegradable. Several advance oxidation processes (AOPs) have been investigated by researchers to evaluate the efficiency of the systems for the removal of ILs from wastewater. However, the issue on relative high cost and environmental concern has limited the application of these AOPs in industry. In this research, photocatalytic study using hybrid nano-materials was conducted to evaluate the efficiency of this system as an alternative AOP system for removal of ILs from wastewater. The synergistic effect of adsorption-photodegradation was introduced by depositing Fe-TiO2 onto the functionalized activated carbon (AC). Nano-TiO2 was synthesized using micromulsion method before modification with transition metal and deposited onto the oxidized AC. Photodegradation reaction of 1-butyl-3-methylimidazolium chloride [bmim]Cl was investigated under simulated visible light irradiation. It was observed that the overall efficiency of the system was increased with the increasing amount of Fe dopant. Investigation on the extrinsic factors such as solution pH, initial concentration of ILs and photocatalyst dosage showed to significantly affect the overall efficiency of the systems where the optimum condition for the system was observed at pH 10, with initial ILs at 1mM at 1 g/L of photocatalyst. The best performance photocatalyst was 0.2Fe-TiO2/AC.

Subject Areas

photodegradation; TiO2; ionic liquids; activated carbon; synergistic effect

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