<scp>UV</scp>‐aided graphene oxide reduction by <scp>TiO<sub>2</sub></scp> towards <scp>TiO<sub>2</sub></scp>/reduced graphene oxide composites for dye‐sensitized solar cells

Ramakrishnan, V.; Muthukumarasamy, N.; Pitchaiya, Selvakumar; Agilan, S.; Pugazhendhi, Arivalagan; Velauthapillai, Dhayalan

doi:10.1002/er.5806

Cited by 24 publications

(7 citation statements)

References 42 publications

(75 reference statements)

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“…The porosity of SnO 2 and rGO/SnO 2 -0.2 materials are analyzed with N 2 gas adsorption−desorption measurements (Figure 3c). The adsorption−desorption isotherms of both materials are type IV with H2-type hysteresis loop in the p/p 0 range of 0.4−0.8, 41 indicating that they have mesoporous structures. Their respective Brunauer−Emmett−Teller (BET) specific surface areas are 123 and 111 m 2 g −1 .…”

Section: Resultsmentioning

confidence: 98%

Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Tian

Wang

Shang

et al. 2023

ACS Appl. Nano Mater.

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Rapid and effective detection of potent volatile organic compounds (VOCs) at low operating temperatures is of great significance to keep humans safe from these environmental pollutants. In this work, we show the facile synthesis of two-dimensional (2D) and three-dimensional (3D)-laminated SnO2 nanomaterials that are decorated with reduced graphene oxide (rGO) and their efficient chemosensing properties for the potent VOC triethylamine (TEA). The as-prepared hybrid material (rGO/SnO2) possesses p-n-type heterojunction and mesoporous structures that are composed of self-assembled SnO2 nanoparticles. The heterojunction between rGO and SnO2 in this hybrid material can be tuned by varying the relative amount of rGO in it. Because of its 3D/2D structures and p-n heterojunction, the material exhibits better carrier mobility, electron transfer, activation energy, and mass diffusion for chemosensing processes than pristine SnO2. It also shows excellent chemosensing properties for TEA, with high response and selectivity at low operating temperatures, while remaining stable and operational for 13 days. Its detection limit for TEA, for example, can reach as low as 358 ppb. These attributes make this material a promising TEA chemosensor for practical applications.

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Section: Resultsmentioning

confidence: 98%

Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Tian

Wang

Shang

et al. 2023

ACS Appl. Nano Mater.

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“…When rGO was added to CTNF@rGO composites, its ability to absorb visible light increased proportionally. 33 The X-ray absorption near edge structure (XANES) spectra of the photocatalysts were acquired to investigate their indepth electronic states. For all samples displayed in Figure 2a, the Cu + peak at 8982 eV agrees very closely with the reference Cu 2 O.…”

Section: Methodsmentioning

confidence: 99%

Tailoring Interfacial Physicochemical Properties in Cu₂O-TiO₂@rGO Heterojunction: Insights from EXAFS and Electron Trap Distribution Analysis

Shenoy,

Chuaicham,

Shanmugam

et al. 2023

ACS Appl. Mater. Interfaces

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In this study, a solution-based synthesis technique was utilized to produce Cu 2 O nanoparticles (NPs) on TiO 2 nanofibers (TNF), which were then subsequently coated with reduced graphene oxide (rGO) nanosheets. In the absence of any cocatalyst, CTNF@rGO-3% composite displayed an ideal photocatalytic H 2 evolution rate of 96 μmol g −1 h −1 under visible light irradiation, this was 10 times higher than that of pure TNF. At 420 nm, the apparent quantum efficiency of this composite reached a maximum of 7.18%. Kelvin probe force microscopy demonstrated the formation of an interfacial electric field that was oriented from CTNF to rGO and served as the driving force for interfacial electron transfer. The successful establishment of an intimate interface between CTNF@rGO facilitated the efficient transfer of charges and suppressed the rate of recombination of photogenerated electron−hole pairs, leading to a substantial enhancement in photocatalytic performance. X-ray photoelectron spectroscopy, photoluminescence spectra, and electrochemical characterization provide further confirmation that formation of a heterojunction between CTNF@rGO leads to an extension in the lifetimes of the photogenerated charge carriers. The experimental evidence suggests that a p−n heterojunction is the mechanism responsible for the significant photocatalytic activity observed in the CTNF@ rGO composite during H 2 evolution.

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“…Because of their low specific weight, high flexibility, superior tunability, high absorption coefficient, lower cost and high transparency, organic material-based solar cells have remarkable performance. 71 Modifications of the TiO 2 -based photoelectrode used in DSSCs have also been carried out with aggregated microspheres, 72 nanosheet spheres, 73 reduced graphene oxide composites, 74 and quasi-cubic fluorine. 75 Quantum dot sensitized solar cells (QDSSCs) have also gained popularity in recent years.…”

Section: Solar Cellsmentioning

confidence: 99%

Bio-fabrication of TiO2 Nanomaterials and Their Applications in Electronics Devices

Chowdhury

Saini

Roy

2021

J. Electron. Mater.

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Nano-biotechnology deals with the role of biological species in the field of nanotechnology and has gained significant attention in the last few decades. Nano-sized materials have superior physical, chemical, optical, electrical and mechanical properties in comparison with the bulk materials. A number of techniques have been employed so far to synthesize nano-structured materials, and among these, bio-inspired methods are found to be economically viable and environmentally sustainable. Titanium dioxide (TiO 2 ) is one of the most abundant and nontoxic transition metal oxides with high thermal stability, good oxidation and corrosion resistance, good hydrophobicity and non-wettability. All these properties along with a wide band gap make TiO 2 an important material for various applications in the fields of solar cells, sensors, batteries, and supercapacitors. In this review work, a comprehensive study has been carried out on the synthesis of TiO 2 nanoparticles (NPs) using different biological extracts and applications of TiO 2 NPs in the design and development of various electronic devices. KeywordsTiO 2 NPs • bio-fabrication • solar cells • lithium-ion batteries • supercapacitor • sensor * Jagannath Roy

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UV‐aided graphene oxide reduction by TiO₂ towards TiO₂/reduced graphene oxide composites for dye‐sensitized solar cells

Abstract: Electron transport layer is one of the important layer in the dye-sensitized solar cells (DSSCs) which is responsible for the transport of photo-generated

Cited by 24 publications

References 42 publications

Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Tailoring Interfacial Physicochemical Properties in Cu₂O-TiO₂@rGO Heterojunction: Insights from EXAFS and Electron Trap Distribution Analysis

Bio-fabrication of TiO2 Nanomaterials and Their Applications in Electronics Devices

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UV‐aided graphene oxide reduction by TiO2 towards TiO2/reduced graphene oxide composites for dye‐sensitized solar cells

Abstract: Electron transport layer is one of the important layer in the dye-sensitized solar cells (DSSCs) which is responsible for the transport of photo-generated

Cited by 24 publications

References 42 publications

Heterojunction-Engineered Reduced Graphene Oxide/SnO2 with Mesoporous Structures for Gas Chemosensors

Heterojunction-Engineered Reduced Graphene Oxide/SnO2 with Mesoporous Structures for Gas Chemosensors

Tailoring Interfacial Physicochemical Properties in Cu2O-TiO2@rGO Heterojunction: Insights from EXAFS and Electron Trap Distribution Analysis

Bio-fabrication of TiO2 Nanomaterials and Their Applications in Electronics Devices

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UV‐aided graphene oxide reduction by TiO₂ towards TiO₂/reduced graphene oxide composites for dye‐sensitized solar cells

Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Tailoring Interfacial Physicochemical Properties in Cu₂O-TiO₂@rGO Heterojunction: Insights from EXAFS and Electron Trap Distribution Analysis