New aluminum mesh from recyclable material for immobilization of TiO<sub>2</sub> in heterogeneous photocatalysis

Barbosa, Ana Angélica Leal; Aquino, Ramon Vinícius Santos de; Silva, Marina Gomes; Júnior, Welenilton José do Nascimento; Duarte, Marta Maria Menezes Bezerra; Dantas, Renato F.; Rocha, Otidene Rossiter Sá da

doi:10.1002/cjce.23706

Cited by 5 publications

(2 citation statements)

References 63 publications

(137 reference statements)

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“…The photocatalysts support material also has an impact on photocatalysis. Barbosa et al ( 2020 ) supported TiO 2 on aluminum mesh with H 2 O 2 to degrade synthetic dyes Bordeaux Red (BR) and Tartrazine (TT) and achieve >99% degradation efficiency after 180 min. To remove 4‐chlorophenol (4‐CP), Bibova et al ( 2019 ) coated SiO 2 /TiO 2 composite on calcined Liapor, which showed calcined Liapor has the best removal rate among three lightweight substrates (natural cork, Liapor, and Sorbix), with the removal of around 95% in 360 min.…”

Section: Water Contaminant Treatmentmentioning

confidence: 99%

Application of visible light active photocatalysis for water contaminants: A review

Sun

O’Connell

2022

Water Environment Research

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Organic water pollutants are ubiquitous in the natural environment arising from domestic products as well as current and legacy industrial processes. Many of these organic water pollutants are recalcitrant and only partially degraded using conventional water and wastewater treatment processes. In recent decades, visible light active photocatalyst has gained attention as a non‐conventional alternative for the removal of organic pollutants during water treatment, including industrial wastewater and drinking water treatment. This paper reviews the current state of research on the use of visible light active photocatalysts, their modified methods, efficacy, and pilot‐scale applications for the degradation of organic pollutants in water supplies and waste streams. Initially, the general mechanism of the visible light active photocatalyst is evaluated, followed by an overview of the major synthesis techniques. Because few of these photocatalysts are commercialized, particular attention was given to summarizing the different types of visible light active photocatalysts developed to the pilot‐scale stage for practical application and commercialization. The organic pollutant degradation ability of these visible light active photocatalysts was found to be considerable and in many cases comparable with existing and commercially available advanced oxidation processes. Finally, this review concludes with a summary of current achievements and challenges as well as possible directions for further research. Practitioner Points Visible light active photocatalysis is a promising advanced oxidation process (AOP) for the reduction of organic water pollutants. Various mechanisms of photocatalysis using visible light active materials are identified and discussed. Many recent photocatalysts are synthesized from renewable materials that are more sustainable for applications in the 21st century. Only a small number of pilot‐scale applications exist and these are outlined in this review.

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Section: Water Contaminant Treatmentmentioning

confidence: 99%

Application of visible light active photocatalysis for water contaminants: A review

Sun

O’Connell

2022

Water Environment Research

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“…Immobilization of such nanostructures is necessary for environment friendly applications of ZnO and TiO 2. [ 243 ] For this purpose, using metal mesh [ 243 ] and clay [ 244,245 ] structures have been introduced in literature as well as calcined mussel shells as a platform for TiO 2 doping. [ 246 ]…”

Section: Photocatalysis Related Applications In Uv Sensingmentioning

confidence: 99%

UV Photochromism in Transition Metal Oxides and Hybrid Materials

Kayani

Kuriakose

Monshipouri

et al. 2021

Small

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Limited levels of UV exposure can be beneficial to the human body. However, the UV radiation present in the atmosphere can be damaging if levels of exposure exceed safe limits which depend on the individual the skin color. Hence, UV photochromic materials that respond to UV light by changing their color are powerful tools to sense radiation safety limits. Photochromic materials comprise either organic materials, inorganic transition metal oxides, or a hybrid combination of both. The photochromic behavior largely relies on charge transfer mechanisms and electronic band structures. These factors can be influenced by the structure and morphology, fabrication, composition, hybridization, and preparation of the photochromic materials, among others. Significant challenges are involved in realizing rapid photochromic change, which is repeatable, reversible with low fatigue, and behaving according to the desired application requirements. These challenges also relate to finding the right synergy between the photochromic materials used, the environment it is being used for, and the objectives that need to be achieved. In this review, the principles and applications of photochromic processes for transition metal oxides and hybrid materials, photocatalytic applications, and the outlook in the context of commercialized sensors in this field are presented.

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Experimental methods in chemical engineering: Scanning electron microscopy andX‐ray ultra‐microscopy—SEMandXuM

Davies

Bessette

et al. 2022

Can J Chem Eng

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Scanning electron microscopy (SEM) produces images at 500 000 times magnification and better than 1 nm resolution to characterize inorganic and organic solid morphology, surface topography, and crystallography. An electron beam interacts with the material and generates secondary electrons (SE) and backscattered electrons (BSE) that detectors capture. Coupled with X-ray energydispersive spectroscopy (X-EDS), SEM-EDS identifies elemental composition. X-ray ultra-microscopy (XuM) traverses particles to identify phase changes and areas of high density and voids without slicing through the solids by microtome. Although SEM instrument capability continuously evolves with higher magnification and better resolution, desktop SEMs are becoming standard in laboratories that require frequent imaging and lower magnification. Hand-held cameras (800-1500Â) have the advantage of low cost, ease of use, and better colours. SEM depth of field is better than visible light microscopy, but image stacking software has narrowed the gap between the two. Modern user interfaces mean that today's SEM instruments are easier to operate and data acquisition is faster, but operators must be able to select the right technique for the application (e.g., SE vs. BSE). Furthermore, they must understand how operating parameters like probe current, accelerating voltage, spot-diameter, convergence angle, and working distance compromise sample integrity. The number of articles the Web of Science indexes that mention SEM has grown from 1000 in 1990 to over 40 000 in 2021. A bibliometric map identified four clusters of research: mechanical properties and microstructure; nanoparticles, composites, and graphene; antibacterial and green synthesis; and adsorption and wastewater.

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New aluminum mesh from recyclable material for immobilization of TiO₂ in heterogeneous photocatalysis

Cited by 5 publications

References 63 publications

Application of visible light active photocatalysis for water contaminants: A review

Application of visible light active photocatalysis for water contaminants: A review

UV Photochromism in Transition Metal Oxides and Hybrid Materials

Experimental methods in chemical engineering: Scanning electron microscopy andX‐ray ultra‐microscopy—SEMandXuM

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New aluminum mesh from recyclable material for immobilization of TiO2 in heterogeneous photocatalysis

Cited by 5 publications

References 63 publications

Application of visible light active photocatalysis for water contaminants: A review

Application of visible light active photocatalysis for water contaminants: A review

UV Photochromism in Transition Metal Oxides and Hybrid Materials

Experimental methods in chemical engineering: Scanning electron microscopy andX‐ray ultra‐microscopy—SEMandXuM

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New aluminum mesh from recyclable material for immobilization of TiO₂ in heterogeneous photocatalysis