J R Cob-Cantú, K López-Velázquez, J G Ronderos-Lara, E R Hoil-Canul, C Castillo-Quevedo, L A Maldonado-López, J L Cabellos-Quiroz
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引用次数: 0
Abstract
TiO2 nanoparticles were immobilized on mortar spheres and subsequently packed into a tubular reactor equipped with a concentrical submergible UV lamp for photocatalytic decolorization of aniline blue solution. The microstructure and chemical composition of TiO2 layer on the spheres, the efficiency for aniline decolorization, and the durability of the TiO2 coating were studied. In this work, the mean thickness of the TiO2 layer was 4.01 ± 0.55 µm, while the mean mass loading on the substrate was 5.6 ± 0.61 mg/cm2. Then, the photocatalytic reactor showed excellent performance for dye removal, reaching levels between 95%-97% in 150 min under UV light. Moreover, by radical scavenging experiments, h+ , O2.-, and ⋅OH were identified as the main reactive species. Even after twenty consecutive cycles, the removal efficiencies were higher than 83% and the decrease of efficiency was related to the partial detachment of the TiO2 layer (mean thickness decreased to 2.17 µm) which was verified by FESEM-EDX and metallographic microscopy. Finally, based on results, it is worth noting that the effective immobilization of TiO2 photocatalyst on the mortar spheres as substrate facilitates catalyst recovery, improves recyclability, and enables continuous water treatment. Therefore, this technology is a promising option for the removal of dyes in water, we even suggest that the proposed photocatalytic reactor could be scaled up for the treatment of effluents from textile industries, contributing to the abatement of water pollution.
期刊介绍：
Frontiers in Chemistry is a high visiblity and quality journal, publishing rigorously peer-reviewed research across the chemical sciences. Field Chief Editor Steve Suib at the University of Connecticut is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to academics, industry leaders and the public worldwide.
Chemistry is a branch of science that is linked to all other main fields of research. The omnipresence of Chemistry is apparent in our everyday lives from the electronic devices that we all use to communicate, to foods we eat, to our health and well-being, to the different forms of energy that we use. While there are many subtopics and specialties of Chemistry, the fundamental link in all these areas is how atoms, ions, and molecules come together and come apart in what some have come to call the “dance of life”.
All specialty sections of Frontiers in Chemistry are open-access with the goal of publishing outstanding research publications, review articles, commentaries, and ideas about various aspects of Chemistry. The past forms of publication often have specific subdisciplines, most commonly of analytical, inorganic, organic and physical chemistries, but these days those lines and boxes are quite blurry and the silos of those disciplines appear to be eroding. Chemistry is important to both fundamental and applied areas of research and manufacturing, and indeed the outlines of academic versus industrial research are also often artificial. Collaborative research across all specialty areas of Chemistry is highly encouraged and supported as we move forward. These are exciting times and the field of Chemistry is an important and significant contributor to our collective knowledge.
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