TiO2/CeO2 Core/Shell nanostructures for photocatalytic and photo electrochemical applications

Ramakrishnan, Karthickraja; Gayathri, V.; Aravinthkumar, K.; Ramachandran, K.; B.,, Ajitha; Rameshbabu, M.; Sasiflorence, S.; Karazhanov, Smagul; Praba, K.; Mohan, Chandra

doi:10.1016/j.inoche.2022.109842

Cited by 14 publications

(4 citation statements)

References 67 publications

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“…Simultaneously, both low refractive material and high refractive material were deposited on separate ultrasonically cleaned glass substrates. The sintering temperature applied to SiO2 was 300 ºC and for TiO2 it requires 500 ºC to get an anatase crystal structure as it reported [14,22]. In order to maintain a uniform deposition of the film, each layer deposition film was kept for sintering (targeted temperature depends upon type of material) up to their targeted temperature for 30 min in a muffle furnace.…”

Section: Methodsmentioning

confidence: 99%

Sol-Gel Spin Coated Transparent Single-TiO2 and SiO2 Thin Film on Glass for Opto-electronic Applications

Sigamani,

Someswararao,

Swaminatham

2024

ajc

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Great attention has been given on the sol-gel synthesis and spin-coating deposition techniques for the fabrication of various thin films. Because of its simple technique to fabricate dielectric (metal oxide) films using tetraethyl orthosilicate and titanium isopropoxide precursors. In this work, transparent single layer of SiO2 and TiO2 thin film was deposited on a glass substrate and characterized by FTIR, UV-visible spectroscopy, fluorescence and scanning electron microscopy techniques. The single layer thin film was mechanically stable and strong by adhering to glass substrates. The FTIR transmittance spectrum evidenced the existence of Si-O-Si and Ti-O-Ti at ~1100 and 1400 cm-1. The UV-visible absorbance spectra of single layer of SiO2 and TiO2 thin films showed strong absorption at below 00 nm. The excitation wavelength at 380 nm, the fluorescence spectra of both thin films showed the highest emission spectrum in between 733-798 nm. The SEM studies confirmed the smooth surface in both SiO2 and TiO2 layers. Further, it could be useful for various applications such as back reflector in solar cells, anti-reflection coatings, hydrophobic and anti-fogging materials.

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Section: Methodsmentioning

confidence: 99%

Sol-Gel Spin Coated Transparent Single-TiO2 and SiO2 Thin Film on Glass for Opto-electronic Applications

Sigamani,

Someswararao,

Swaminatham

2024

ajc

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“…This is because of the high recombination of photogenerated electron-hole pairs and lower charge transport process, which significantly reduces the photocatalytic performance in degrading pollutants and the power conversion efficiency in solar cells. The aforementioned issue has been resolved using a variety of techniques, including metal and non-metal ion doping, [22][23][24] hybridization of carbon-related materials, [25,26] semiconductor coupling [3,27] and noble metal deposition. [28] The two-dimensional graphene nanosheet has unique characteristics such as high surface area, excellent carrier mobility, high optical transparency and excellent electrical conductivity, making it a spotlight material in photocatalytic activity and DSSC.…”

Section: Introductionmentioning

confidence: 99%

“…This is because of the high recombination of photogenerated electron‐hole pairs and lower charge transport process, which significantly reduces the photocatalytic performance in degrading pollutants and the power conversion efficiency in solar cells. The aforementioned issue has been resolved using a variety of techniques, including metal and non‐metal ion doping, [22–24] hybridization of carbon‐related materials, [25,26] semiconductor coupling [3,27] and noble metal deposition [28] …”

Section: Introductionmentioning

confidence: 99%

Efficient Electron Transfer across Strontium Titanate Decorated Graphene Oxide for High‐Performance Dye‐Sensitized Solar Cells and Photocatalytic Degradation of Dye and Antibiotic

Aravinthkumar,

Raja Mohan

2024

ChemistrySelect

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Understanding synergistic interface features is a crucial step towards adjustable and controllable interfaces for photocatalytic and photovoltaic devices. In this work, a novel layer‐structured rGO hybrid with SrTiO3 (STO/rGO) based binary composite has developed via hydrothermal method. The highly stable STO/rGO is used to construct a dual‐functional platform for dye, antibiotic degradation and DSSC. The photocatalytic activities of STO/rGO composites were examined using Methylene Blue (MB) and Tetracycline (TC) degradation in an aqueous solution under white light irradiation. The catalyst containing STG‐3 exhibited outstanding photocatalytic degradation efficiency of 93.06 % and 95.23 % toward MB and TC, respectively. In addition, the hybrid composites‐based photoanode had the most outstanding efficiency of 3.74 % with an increase in JSC. The performance is far better than pristine STO. The improved efficiency is ascribed to the strong interconnectivity, excellent crystallinity, higher surface area and high porosity, which results in reduced interfacial charge recombination loss, outstanding dye adsorption and better electron transport. Furthermore, a predicted mechanism is provided to explain the higher performance of STO/rGO hybrid composites.

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“…On the other hand, TiO 2 has three main crystalline structures including rutile, anatase and brookite [19], where rutile and anatase are popularly used for photocatalysts and SCR catalysts [20][21][22]. Compositing CeO 2 /TiO 2 compound is an available method to improve the catalytic properties, and which has been studied as excellent photocatalysts [23][24][25] or SCR catalysts [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Catalytic properties of CeO₂/TiO₂ synthesized by different methods towards the organic dye photodegradation and NH₃ selected catalytic removal of NO_x

Ning,

He,

et al. 2023

Phys. Scr.

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In this work, three synthesis methods including photo-chemical, precipitation and hydrothermal were applied for synthesizing CeO2/TiO2 catalysts, and the catalytic performance including photodegradation degrees for organic pollutant and ammonia selective catalytic reduction (NH3-SCR) for NO removal were investigated. It was found that the photo-chemical synthesized CeO2-TiO2-PC exhibited the best photodegradation ability for methylene blue (MB), which had the degradation ratio of 91.21 % and was approximately 23.92 % higher than that with the matrix of rutile TiO2. The formed Ce-Ti heterojunction enhanced the separation of e-/h+ and further promoted the photocatalytic properties. Moreover, the CeO2-TiO2-PC, and the CeO2-TiO2-P which synthesized by the precipitation method showed better NH3-SCR properties than that of hydrothermal synthesized CeO2-TiO2-H below 300 oC, while the CeO2-TiO2-H owned an outstanding NH3-SCR performance above 300 oC. The difference on the NH3-SCR properties may be major attributed to the acid sites, pore structures and surface areas on the surface of different catalysts.

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TiO2/CeO2 Core/Shell nanostructures for photocatalytic and photo electrochemical applications

Cited by 14 publications

References 67 publications

Sol-Gel Spin Coated Transparent Single-TiO2 and SiO2 Thin Film on Glass for Opto-electronic Applications

Sol-Gel Spin Coated Transparent Single-TiO2 and SiO2 Thin Film on Glass for Opto-electronic Applications

Efficient Electron Transfer across Strontium Titanate Decorated Graphene Oxide for High‐Performance Dye‐Sensitized Solar Cells and Photocatalytic Degradation of Dye and Antibiotic

Catalytic properties of CeO₂/TiO₂ synthesized by different methods towards the organic dye photodegradation and NH₃ selected catalytic removal of NO_x

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TiO2/CeO2 Core/Shell nanostructures for photocatalytic and photo electrochemical applications

Cited by 14 publications

References 67 publications

Sol-Gel Spin Coated Transparent Single-TiO2 and SiO2 Thin Film on Glass for Opto-electronic Applications

Sol-Gel Spin Coated Transparent Single-TiO2 and SiO2 Thin Film on Glass for Opto-electronic Applications

Efficient Electron Transfer across Strontium Titanate Decorated Graphene Oxide for High‐Performance Dye‐Sensitized Solar Cells and Photocatalytic Degradation of Dye and Antibiotic

Catalytic properties of CeO2/TiO2 synthesized by different methods towards the organic dye photodegradation and NH3 selected catalytic removal of NOx

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Product

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Catalytic properties of CeO₂/TiO₂ synthesized by different methods towards the organic dye photodegradation and NH₃ selected catalytic removal of NO_x