Author
H. Al-Ekabi
Bio: H. Al-Ekabi is an academic researcher. The author has contributed to research in topics: Photocatalysis. The author has an hindex of 1, co-authored 1 publications receiving 49 citations.
Topics: Photocatalysis
Papers
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TL;DR: In this paper, the authors summarize the formation reactions of the hydroxyl radical (·OH) and the mechanisms of pollutants degradation in six types of advanced oxidation processes, including radiation, photolysis and photocatalysis, sonolysis, electrochemical oxidation technologies, Fenton based reactions, and ozone-based processes.
Abstract: Advanced oxidation processes (AOPs), defined as those technologies that utilize the hydroxyl radical (·OH) for oxidation, have received increasing attention in the research and development of wastewater treatment technologies in the last decades. These processes have been applied successfully for the removal or degradation of toxic pollutants or used as pretreatment to convert recalcitrant pollutants into biodegradable compounds that can then be treated by conventional biological methods. The efficacy of AOPs depends on the generation of reactive free radicals, the most important of which is the hydroxyl radical (·OH). The authors summarize the formation reactions of ·OH and the mechanisms of pollutants degradation. They cover six types of advanced oxidation processes, including radiation, photolysis and photocatalysis, sonolysis, electrochemical oxidation technologies, Fenton-based reactions, and ozone-based processes. Controversial issues in pollutants degradation mechanism were discussed. They review t...
1,102 citations
TL;DR: Titanium dioxide in the anatase crystalline form was used as a photocatalyst to generate hydroxyl radicals in a flowthrough water reactor, and rapid cell death was observed in water devoid of significant amounts of inorganic-radical scavengers.
Abstract: Titanium dioxide in the anatase crystalline form was used as a photocatalyst to generate hydroxyl radicals in a flowthrough water reactor. Experiments were performed on pure cultures of Escherichia coli in dechlorinated tap water and a surface water sample to evaluate the disinfection capabilities of the reactor. In water devoid of significant amounts of inorganic-radical scavengers, rapid cell death was observed with both pure cultures and members of the indigenous flora in a natural water sample.
425 citations
TL;DR: Ag core and TiO 2 shell (Ag@TiO 2 ) structured nanoparticles with 1:1.7 molar ratio were synthesized using one pot synthesis method and post calcination was carried out at 450°C for 3h to convert it from amorphous to crystalline form as mentioned in this paper.
92 citations
Journal Article•
TL;DR: In this article, the basics of photocatalysis on semiconductors, mainly on TiO2, are described and a short review of more interesting practical applications of the processes is presented.
Abstract: This paper describes the basics of photocatalysis on semiconductors, mainly on TiO2 and the application of photocatalytic processes to water purification from organic matter. The second chapter is devoted to metal cocatalysts introduced in order to improve the photocatalytic action of titania. Finally, a short review of more interesting practical applications of the processes is presented.
91 citations
TL;DR: Yttrium doped zinc oxide was prepared by microwave irradiation of Y 3 ·6H 2 O and Zn(NO 3 ) 2 ·4H 2O as precursors, in ethanol-water medium as discussed by the authors.
67 citations