Rhodamine-loaded TiO2 particles for detection of polymer coating UV degradation

Ovodok, Evgeni; Maltanava, Hanna; Poznyak, S.K.; Ivanovskaya, M. I.; Shendyukov, Vladislav; Špaček, Vladimír; Scharnagl, Nico; Maia, Frederico; Tedim, João

doi:10.1016/j.matpr.2019.10.069

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…[ 109 ] TiO 2 has a bandgap of approximately 3.0 to 3.2 eV and is used as a photocatalyst in various fields. [ 110–113 ] Many nanostructures have been developed, such as nanoparticles, [ 114–116 ] nanorods, [ 117–119 ] nanowires, [ 120,121 ] nanobelts, [ 122,123 ] and nanotubes. [ 124,125 ] In addition, research on UVC detectors using TiO 2 has been actively conducted.…”

Section: Classification Of Uvc Photodetectorsmentioning

confidence: 99%

Recent advances in self‐powered and flexible UVC photodetectors

et al. 2022

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Ultraviolet-C (UVC) radiation is employed in various applications, including irreplaceable applications in military and civil fields, such as missile guidance, flame detection, partial discharge detection, disinfection, and wireless communication. Although most modern electronics are based on Si, UVC detection technology remains a unique exception because the short wavelength of UV radiation makes efficient detection with Si difficult. In this review, recent challenges in obtaining ideal UVC photodetectors with various materials and various forms are introduced. An ideal photodetector must satisfy the following requirements: high sensitivity, fast response speed, high on/off photocurrent ratio, good regional selectivity, outstanding reproducibility, and superior thermal and photo stabilities. UVC detection is still in its infancy compared to the detection of UVA as well as other photon spectra, and recent research has focused on different key components, including the configuration, material, and substrate, to acquire battery-free, super-sensitive, ultra-stable, ultra-small, and portable UVC photodetectors. We introduce and discuss the strategies for fabricating self-powered UVC photodetectors on flexible substrates in terms of the structure, material, and direction of incoming radiation. We also explain the physical mechanisms of self-powered devices with various architectures. Finally, we present a brief outlook that discusses the challenges and future strategies for deep-UVC photodetectors. K E Y WO R D Sphoto-absorber, photoconductor, responsivity, UV radiation  INTRODUCTIONUltraviolet (UV) radiation is an ordinary component of solar radiation. Although it accounts for less than 10% of the total sunlight, UV radiation has a severe influence on humanity. The International Commission on Illumination (CIE) divides the spectrum of solar electromagnetic radiation into three bands, as shown in Figure 1: UVA (315-400 nm), UVB (280-315 nm), and UVC (100-280 nm). [1] Among them, UVA and UVB are mainly derived from the natural environment. They account for 90%-95% and 5%-10% of solar radiation, respectively, and are of the part of sunlight that leads to sunburn, skin cancers, and cataracts. [2][3][4][5] Until now, many photodetectors, which detect UV radiation with wavelengths longer than 280 nm, have been integrated into weather forecast programs to prevent UVA andThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Classification Of Uvc Photodetectorsmentioning

confidence: 99%

Recent advances in self‐powered and flexible UVC photodetectors

et al. 2022

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“…High photocatalytic activity of ZnO and TiO 2 nanostructures have led to applications such as the degradation of water pollutant dyes such as rhodamine B, [ 247,248 ] methyl orange (MO), [ 249–251 ] methylene blue [ 240,246 ] and Congo red [ 242,252 ] and self‐cleaning fabrics. [ 253,254 ]…”

Section: Photocatalysis Related Applications In Uv Sensingmentioning

confidence: 99%

UV Photochromism in Transition Metal Oxides and Hybrid Materials

Kayani

Kuriakose

Monshipouri

et al. 2021

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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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“…Conventional materials, like ZnO, TiO 2 , ZrO 2 , CeO 2 , and SnO 2 are only active in ultraviolet (UV) light, which accounts for just 4% of the solar spectrum, limiting their usage in simulated or direct solar-light dye degradation over a broad visible range (Banerjee et al 2014 ; Nkosi et al 2014 ; Ovodok et al 2018 ; Natarajan et al 2018 ; Yadav et al 2019 ; Kannan et al 2020 ; Aliabadi et al 2020 ; Luque et al 2021 ). The advantage of using iron-based photocatalysts is that they can absorb 39% or more of the solar-light composition in visible light and hence have effective degradation efficiencies (Hassani et al 2018 ; Madihi-Bidgoli et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic degradation of malachite green dye by highly stable visible-light-responsive Fe-based tri-composite photocatalysts

Mostafa

Amdeha

2022

Environ Sci Pollut Res

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A novel visible-light-sensitive ZnVFeO4 photocatalyst has been fabricated by the precipitation method at different pH values for the enhanced photocatalytic degradation of malachite green (MG) dye as a representative pollutant under visible light irradiation at neutral pH conditions. The structure and optical characteristics of the prepared photocatalysts were investigated by XRD, FTIR, N2 adsorption–desorption, TEM, diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) analyses. In addition, the photocatalytic activity of ZnVFeO4 photocatalysts superior the efficiency to be more than that of the mono and bi-metal oxides of iron and iron zinc oxides, respectively. The best sample, ZnVFeO4 at pH 3, significantly enhances the degradation rate under visible light to be 12.7 × 10−3 min−1 and can retain a stable photodegradation efficiency of 90.1% after five cycles. The effect of the catalyst dose and the initial dye concentration on the photodegradation process were studied. This promising behavior under visible light may be attributed to the low bandgap and the decreased electron–hole recombination rate of the ZnVFeO4 heterostructures. The scavenger experiment confirmed that the hydroxyl radicals induced the MG photodegradation process effectively. Hence, the ZnVFeO4 is a reliable visible-light-responsive heterostructure photocatalyst with excellent potential for the photodegradation of organic pollutants in wastewater treatment.

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Rhodamine-loaded TiO2 particles for detection of polymer coating UV degradation

Cited by 8 publications

References 14 publications

Recent advances in self‐powered and flexible UVC photodetectors

Recent advances in self‐powered and flexible UVC photodetectors

UV Photochromism in Transition Metal Oxides and Hybrid Materials

Enhanced photocatalytic degradation of malachite green dye by highly stable visible-light-responsive Fe-based tri-composite photocatalysts

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