Low-temperature deposition of self-cleaning anatase TiO2 coatings on polymer glazing via sequential continuous and pulsed PECVD

Dey, B.; Bulou, Simon; Ravisy, W.; Gautier, Nicolas; Richard‐Plouet, Mireille; Granier, A.; Choquet, Patrick

doi:10.1016/j.surfcoat.2022.128256

Cited by 6 publications

(6 citation statements)

References 56 publications

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“…Moreover, in the case of semiconductor photocatalysts, the quantum yields of photocatalytic reactions (even under UV irradiation) do not reach the theoretical value of 100% because of the charge carriers' recombination (surface or bulk (Herrmann, 1999)). Therefore, numerous studies on the performance improvements have been carried out, focusing on the following aspects: (i) controlled synthesis conditions to improve the properties of photocatalysts (e.g., high crystallinity, a lack of defects, large specific surface area, pure polymorphic forms or fixed ratio of different polymorphs), (ii) morphology architecture, such as the preparation of photocatalysts with exposed facets, different dimensions, advanced morphologies (e.g., inverse opals, nanotubes, nanowires), and (iii) preparation of composite photocatalysts, e.g., by using the metallic or/and nonmetallic elements, and different compounds, to modify the surface or/and the structure of photocatalysts (Bakar and Ribeiro, 2016;Cai et al, 2016;Cheng et al, 2016;Lee et al, 2021;Wang T. M. et al, 2022;Dey et al, 2022;Korosi et al, 2022;Shehab et al, 2022;Shukla and Angappane, 2022). It should be mentioned that for both purposes, i.e., an appearance of vis response and activity enhancement under UV, similar methods have been used for the modifications of wide-bandgap semiconductors, i.e., doping, surface modification, coupling, and nanoarchitecture design (Sun et al, 2019;Huang et al, 2020;Yoshimura et al, 2020;Luo et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Property-governed performance of platinum-modified titania photocatalysts

Wang

Kowalska

2022

Front. Chem.

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Titania is probably the most widely investigated semiconductor photocatalyst because of various advantages, such as high activity, thermal and chemical stability, low price, abundance, and negligible toxicity. However, pristine titania is also characterized by charge carriers’ recombination, and thus lower quantum yields of photocatalytic reactions than theoretical 100%. Moreover, its wide bandgap, despite being recommended for excellent redox properties, means also inactivity under visible part of solar radiation. Accordingly, titania has been surface modified, doped and coupled with various elements/compounds. For example, platinum deposited on the surface of titania has shown to improve both UV activity and the performance under vis. Although the studies on titania modification with platinum started almost half a century ago, and huge number of papers have been published up to now, it is unclear which properties are the most crucial and recommended to obtain highly efficient photocatalyst. In the literature, the opposite findings could be found on the property-governed activities that could result from huge differences in the reaction systems, and also examined photocatalysts. Considering the platinum properties, its content, the size of nanoparticles and the oxidation state, must be examined. Obviously, the characteristics of titania also influence the resultant properties of deposited platinum, and thus the overall photocatalytic performance. Although so many reports on Pt/TiO2 have been published, it is hardly possible to give indispensable advice on the recommended properties. However, it might be concluded that usually fine platinum NPs uniformly deposited on the titania surface result in high photocatalytic activity, and thus in the low optimal content of necessary platinum. Moreover, the aggregation of titania particles might also help in the lowering the necessary platinum amount (even to 0.2 wt%) due to the interparticle electron transfer mechanism between titania particles in one aggregate. In respect of platinum state, it is thought that it is highly substrate-specific case, and thus either positively charged or zero valent platinum is the most recommended. It might be concluded that despite huge number of papers published on platinum-modified titania, there is still a lack of comprehensive study showing the direct correlation between only one property and the resultant photocatalytic activity.

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Section: Introductionmentioning

confidence: 99%

Property-governed performance of platinum-modified titania photocatalysts

Wang

Kowalska

2022

Front. Chem.

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“…Dey et al [90] obtained anatase TiO 2 through continuous and pulsed plasma-enhanced chemical vapor deposition at substrate temperatures below 60 • C. The thin films were deposited on thick polycarbonate plates and tested in the photocatalytic degradation of methylene blue in an aqueous solution (initial concentration of 1 µmol/L) under 20 W/m 2 UV exposure as well as under simulated solar radiation. Under simulated solar radiation, the anatase-coated substrate showed good ability for Mb degradation, leading to an apparent rate constant degradation of 0.4 h −1 [90].…”

Section: Wastewater Treatmentmentioning

confidence: 99%

Advanced Nanostructured Coatings Based on Doped TiO2 for Various Applications

Gartner,

Szekeres,

Stroescu

et al. 2023

Molecules

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For many years, TiO2-based materials and improving their properties in order to expand their application areas have been the focus of numerous research groups. Various innovative approaches have been proposed to improve the photocatalytic and gas-sensing properties of TiO2 nanostructures. In this review, we aim to synthesize the available information in the literature, paying special attention to the sol–gel technology, which is one of the most frequently used methods for TiO2 synthesis. The influence of dopants on the structural, morphological, optical, and electrical properties of TiO2 and the way to modify them in a controlled manner are briefly discussed. The role of shallow and/or deep energy levels within the TiO2 bandgap in the electron transport behavior of doped TiO2 is emphasized. Selected research on photocatalytic applications in water disinfection, wastewater treatment, and self-sterilizing coatings that contribute to improving the quality of human life and environmental preservation is highlighted. A survey of biosensors that are closely related to medical applications such as cancer detection, implantology, and osteogenesis is also provided. Finally, the pressing problems that need to be solved in view of the future development of TiO2-based nanostructures are listed.

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“…The synthesis of TiO2 nanoparticles can be carried out in several methods, such as sol-gel [21], sputtering [22], plasma-enhanced chemical vapor deposition (PECVD) [23], a spin-coating process [24], laser ablation [25], and ultrasonic spray pyrolysis [26]. Based on these methods, ultrasonic spray pyrolysis is one of the attractive methods for producing TiO2 nanoparticles because the resulting powder has a round and porous shape so that the surface is smooth.…”

Section: Introductionmentioning

confidence: 99%

Morphological Evolution of TiO2 Nanoparticle Deposited on QCM Sensor at Various Calcination Temperature

Nugraha,

Rachmaniar,

Tjahjanto

et al. 2023

Trends Sci

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The morphology of TiO2 nanoparticles deposited on a QCM sensor is crucial in its mechanical loading. Different heating treatments transform the morphology of TiO2 nanoparticles, affecting the loading and hence shifting the resonant frequency and changing the impedance QCM value. In this research, the deposition of TiO2 nanoparticles was carried out above QCM using the ultrasonic spray pyrolysis (USP) technique with variations in calcination temperature of 200, 230, and 250 °C. The analysis results show that the increase in the agglomeration and particle size causes an increase in the inertial mass of TiO2 nanoparticles. HIGHLIGHTS The size of TiO2 agglomerates and their particles increases as the calcination temperature is raised Higher calcination temperature resulted in a larger frequency shift of the QCM oscillation due to the layer inertial mass increase Larger TiO2 nanoparticle size significantly increases the layer’s resistance, contributing to higher impedance GRAPHICAL ABSTRACT

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Low-temperature deposition of self-cleaning anatase TiO2 coatings on polymer glazing via sequential continuous and pulsed PECVD

Cited by 6 publications

References 56 publications

Property-governed performance of platinum-modified titania photocatalysts

Property-governed performance of platinum-modified titania photocatalysts

Advanced Nanostructured Coatings Based on Doped TiO2 for Various Applications

Morphological Evolution of TiO2 Nanoparticle Deposited on QCM Sensor at Various Calcination Temperature

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