Structural and photoelectrochemical characterization of heterostructured carbon sheet/Ag2MoO4-SnS/Pt photocapacitor

Kajana, Thirunavukarasu; Velauthapillai, Dhayalan; Shivatharsiny, Yohi; Ravirajan, Punniamoorthy; Yuvapragasam, Akila; Senthilnanthanan, Meena

doi:10.1016/j.jphotochem.2020.112784

Cited by 17 publications

(5 citation statements)

References 29 publications

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“…Titanium dioxide (TiO 2 ) was widely used as a golden standard nanomaterial for sustainable energy generation and the removal of environmental pollutants [5,6] due to its efficient photocatalytic activity, low cost, nontoxic nature and high stability [7]. Although TiO 2 exhibits the desired performance in ultraviolet light, its overall performance is still limited because of low mobility of porous TiO 2 [8] and its limited spectral response wide bandgap (3.0-3.2 eV) that cannot make use of visible light [9]. Several strategies were investigated and reported to overcome this limitation, which include preparation of nanocomposites [10][11][12], doping/codoping [5,13,14], and synthesis of particles with different nanostructures [15,16], such as nanorods, nanowires, nanotubes, etc.…”

Section: Introductionmentioning

confidence: 99%

Cost Effective Solvothermal Method to Synthesize Zn-Doped TiO2 Nanomaterials for Photovoltaic and Photocatalytic Degradation Applications

et al. 2021

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Titanium dioxide (TiO2) is a commonly used wide bandgap semiconductor material for energy and environmental applications. Although it is a promising candidate for photovoltaic and photocatalytic applications, its overall performance is still limited due to low mobility of porous TiO2 and its limited spectral response. This limitation can be overcome by several ways, one of which is doping that could be used to improve the light harvesting properties of TiO2 by tuning its bandgap. TiO2 doped with elements, such as alkali-earth metals, transition metals, rare-earth elements, and nonmetals, were found to improve its performance in the photovoltaic and photocatalytic applications. Among the doped TiO2 nanomaterials, transition metal doped TiO2 nanomaterials perform efficiently by suppressing the relaxation and recombination of charge carriers and improving the absorption of light in the visible region. This work reports the possibility of enhancing the performance of TiO2 towards Dye Sensitised Solar Cells (DSSCs) and photocatalytic degradation of methylene blue (MB) by employing Zn doping on TiO2 nanomaterials. Zn doping was carried out by varying the mole percentage of Zn on TiO2 by a facile solvothermal method and the synthesized nanomaterials were characterised. The XRD (X-Ray Diffraction) studies confirmed the presence of anatase phase of TiO2 in the synthesized nanomaterials, unaffected by Zn doping. The UV-Visible spectrum of Zn-doped TiO2 showed a red shift which could be attributed to the reduced bandgap resulted by Zn doping. Significant enhancement in Power Conversion Efficiency (PCE) was observed with 1.0 mol% Zn-doped TiO2 based DSSC, which was 35% greater than that of the control device. In addition, it showed complete degradation of MB within 3 h of light illumination and rate constant of 1.5466×10−4s−1 resembling zeroth order reaction. These improvements are attributed to the reduced bandgap energy and the reduced charge recombination by Zn doping on TiO2.

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Section: Introductionmentioning

confidence: 99%

Cost Effective Solvothermal Method to Synthesize Zn-Doped TiO2 Nanomaterials for Photovoltaic and Photocatalytic Degradation Applications

et al. 2021

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“…Moreover, the stronger edge effects and the quantum confinement effects make these nanodots (quantum dots) or nanostructures of metal chalcogenides possible to utilize considerable amounts of solar irradiation [17][18][19]. These are playing an increasingly important role in different applications, such as photo degradation [20], capacitors [21], and hydrogen evolution [22] due to their suitable electronic and optical properties.…”

Section: Introductionmentioning

confidence: 99%

SnS2/TiO2 Nanocomposites for Hydrogen Production and Photodegradation under Extended Solar Irradiation

et al. 2021

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Earth–abundant transition metal chalcogenide materials are of great research interest for energy production and environmental remediation, as they exhibit better photocatalytic activity due to their suitable electronic and optical properties. This study focuses on the photocatalytic activity of flower-like SnS2 nanoparticles (composed of nanosheet subunits) embedded in TiO2 synthesized by a facile hydrothermal method. The materials were characterized using different techniques, and their photocatalytic activity was assessed for hydrogen evolution reaction and the degradation of methylene blue. Among the catalysts studied, 10 wt. % of SnS2 loaded TiO2 nanocomposite shows an optimum hydrogen evolution rate of 195.55 µmolg−1, whereas 15 wt. % loading of SnS2 on TiO2 exhibits better performance against the degradation of methylene blue (MB) with the rate constant of 4.415 × 10−4 s−1 under solar simulated irradiation. The improved performance of these materials can be attributed to the effective photo-induced charge transfer and reduced recombination, which make these nanocomposite materials promising candidates for the development of high-performance next-generation photocatalyst materials. Further, scavenging experiments were carried out to confirm the reactive oxygen species (ROS) involved in the photocatalytic degradation. It can be observed that there was a 78% reduction in the rate of degradation when IPA was used as the scavenger, whereas around 95% reduction was attained while N2 was used as the scavenger. Notably, very low degradation (<5%) was attained when the dye alone was directly under solar irradiation. These results further validate that the •OH radical and the superoxide radicals can be acknowledged for the degradation mechanism of MB, and the enhancement of degradation efficiency may be due to the combined effect of in situ dye sensitization during the catalysis and the impregnation of low bandgap materials on TiO2.

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“…Here, the Ag 2 MoO 4 and SnO nanoparticles served as photoactive and capacitive layers, respectively. 58 The SnO nanoparticles were derived from the controlled oxidation of spherical SnS nanoparticles. The high capacitance is attributed to the large conductive surface and high conductivity of the Ag 2 MoO 4 –SnS film.…”

Section: Photocapacitorsmentioning

confidence: 99%

Potential transition and post-transition metal sulfides as efficient electrodes for energy storage applications: review

et al. 2022

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Structural and photoelectrochemical characterization of heterostructured carbon sheet/Ag2MoO4-SnS/Pt photocapacitor

Cited by 17 publications

References 29 publications

Cost Effective Solvothermal Method to Synthesize Zn-Doped TiO2 Nanomaterials for Photovoltaic and Photocatalytic Degradation Applications

Cost Effective Solvothermal Method to Synthesize Zn-Doped TiO2 Nanomaterials for Photovoltaic and Photocatalytic Degradation Applications

SnS2/TiO2 Nanocomposites for Hydrogen Production and Photodegradation under Extended Solar Irradiation

Potential transition and post-transition metal sulfides as efficient electrodes for energy storage applications: review

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