It is important that a pollution remediation system be able to cater for a variety of pollutant species present in the water to be treated. The aim of this study was to utilise a series of commercial zeolites (H-MOR, H-β, and H-ZSM5) for the concomitant adsorption and photodegradation of Cu and tetracycline (TC) molecules. The adsorbent cum photocatalyst was characterised by SEM and FTIR. FTIR confirmed the key functional groups (Si-O-Si and Al-O-Si) in the series of zeolites, and H-β zeolite was demonstrated to be the most effective adsorbent cum photocatalyst for both adsorption and photodegradation of Cu and TC molecules. These results were further corroborated from the pseudo-first-order rate constant values. Among the investigated zeolites, H-ZSM5 displayed the least adsorption and photodegradation performance for Cu and TC molecules. The photolysis reaction confirms the significant role of zeolites in the photodegradation test, as low performance was recorded in the absence of the zeolites.
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http://dx.doi.org/10.1007/s11356-021-16556-w | DOI Listing |
Environ Res
January 2025
Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Jalan Tungku Link Gadong, BE1410, Brunei Darussalam.
Bismuth-based photocatalysts proved to have remarkable photoactivity for antibiotic degradation from water. However, the two significant challenges of bismuth-based photocatalysts are the fast charge recombination rate and higher energy band gap. This study successfully synthesized a novel I-Bi/BiWO/MWCNTs (C-WBI) heterostructure composite photocatalysts with shorter energy band-gap and higher charge production capability through interfacial amidation linkage.
View Article and Find Full Text PDFEnviron Res
January 2025
Xi'an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, Technological Institute of Materials & Energy Science (TIMES), Xijing University, Xi'an 710123, PR China; School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China. Electronic address:
This paper focuses on the research background of zeolite-based photocatalytic materials, the role of zeolites in photocatalytic materials, and their application in various fields. It focuses on the critical roles of zeolites in photocatalytic materials and their application prospects. It outlines the mechanisms of zeolites in different photocatalytic materials, including adsorption, structural stabilization, domain-limiting, electric field, catalysis, ion exchange, shape-selective, and solvation, which elucidates the potential advantages of zeolites in photocatalytic materials.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
Center for Marine Studies, Federal University of Paraná, Pontal do Paraná, Brazil.
Microplastics (MP) are suitable substrates for the colonization of harmful microalgal cells and the adsorption of their lipophilic compounds including phycotoxins. Moreover, such interactions likely change as physical-chemical characteristics of the MP surface are gradually modified during plastic degradation in aquatic environments. Using a combination of innovative laboratory experiments, this study systematically investigated, for the first time, the influence of various MP characteristics (polymeric composition, shape, size, and/or surface roughness) on its capacity to carry both living harmful algal cells and dissolved phycotoxins.
View Article and Find Full Text PDFJ Environ Manage
December 2024
Chemistry Department, Faculty of Science, Benha University, Benha, 13518, Egypt.
The photocatalytic efficiency of TiO has been opposed by the fast recombination speed of photogenerated carriers. Here, g-CN -modified sulfate-built-in TiO quantum dots (ST-QDs) were successfully created using a simple ultrasonication-thermal procedure. g-CN-enrapped ST QDs with a 10 nm size were revealed by the characterization results.
View Article and Find Full Text PDFNanomaterials (Basel)
December 2024
Institute of Physical Chemistry-Ilie Murgulescu of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania.
Bimetallic (Ta/Ti, V, Co, Nb) mesoporous MCM-41 nanoparticles were obtained by direct synthesis and hydrothermal treatment. The obtained mesoporous materials were characterized by XRD, XRF, N adsorption/desorption, SEM, TEM, XPS, Raman, UV-Vis, and PL spectroscopy. A more significant effect was observed on the mesoporous structure, typically for MCM-41, and on optic properties if the second metal (Ti, Co) did not belong to the same Vb group with Ta as V and Nb.
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