Synergistic removal of tetracycline hydrochloride by g-C3N4/MoS2/MIL-53(Fe) photocatalysts with Fenton reaction: Photothermal effect and mechanistic analysis
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Abstract
The combination of photocatalysis and Fenton technology is considered a promising technology for antibiotic wastewater treatment. In this paper, a CN/MoS2/MIL-53(Fe) double Z-scheme heterojunction catalyst with a photothermal effect was constructed. The intrinsic photothermal conversion effect of the catalyst was conducive to increasing the photo-Fenton catalytic activity. Meanwhile, the double Z-scheme heterojunction inhibits the recombination of photogenerated carriers, which improves the redox capacity. It is worth mentioning that the photo-Fenton system can remove 92.5 % of TCH in 30 min, which is 1.64 and 1.32 times higher than that of the photocatalytic and Fenton reactions, respectively, and its excellent performance was caused by the superior Fe3+/Fe2+ cycling efficiency, as well as the synergistic effect between photocatalytic and Fenton reactions. The experimental results indicated that the photo-Fenton system demonstrated strong resistance to ionic interference and structural stability, confirming its potential for practical applications. Free radical trapping experiments revealed the key roles of active species such as O2−, h+, 1O2, and OH in the removal of tetracycline hydrochloride (TCH). The possible degradation intermediates and pathways of TCH were deduced by LC-MS analysis. In addition, the toxicity analysis showed that the constructed photo-Fenton system was an environmentally friendly technique for antibiotic wastewater treatment.
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The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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