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Arun V, Manikandan V, AlSalhi MS, Devanesan S, Priyadharsan A, K A RK, Maadeswaran P. An efficient optical properties of Sn doped ZnO/CdS based solar light driven nanocomposites for enhanced photocatalytic degradation applications. CHEMOSPHERE 2022; 300:134460. [PMID: 35430198 DOI: 10.1016/j.chemosphere.2022.134460] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/21/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
Metal sulfide - semiconductor nanocomposites synthesized with well-defined tin metal, exhibited the wide bandgap, the absorptions are limited to the UV-vis region for reduction of Reactive Blue 160 (RB 160) under solar light irradiation. The prepared samples were characterized using optoelectronic techniques. Conveniently, a wider range of wavelengths and physical properties can be enabled by doping these metal oxide nanoparticles. Whereas the photoreduction of RB 160 is unambiguously associated within charge separation and transmission progression from the excited Sn doped ZnO/CdS. Furthermore, Photocatalytic degradation efficiency for the Sn doped ZnO/CdS composites still reliant on the excitation strength, indicating the several electrons and protons were precise as a result of charge separation and transmission in prepared catalyst. Sn doped ZnO/CdS composites shows 94% Photocatalytic degradation efficiency within 120 min under sunlight irradiation. This photocatalytic nanocomposites may find capable applications in solar cells to power stretchable and also in wearable electronics.
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Affiliation(s)
- Velumani Arun
- Department of Energy Science and Technology, Periyar University, Salem, 636011, Tamil Nadu, India; Department of Physics, E.R.K Arts and Science College, Erumiyampatti, 636905, Dharmapuri, Tamil Nadu, India
| | - Velu Manikandan
- Department of BioNano Technology, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do, 13120, South Korea
| | - Mohamad S AlSalhi
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia
| | - Sandhanasamy Devanesan
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia
| | - Arumugam Priyadharsan
- Department of Physics, E.R.K Arts and Science College, Erumiyampatti, 636905, Dharmapuri, Tamil Nadu, India.
| | - Ramesh Kumar K A
- Department of Energy Science and Technology, Periyar University, Salem, 636011, Tamil Nadu, India
| | - Palanisamy Maadeswaran
- Department of Energy Science and Technology, Periyar University, Salem, 636011, Tamil Nadu, India.
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Abstract
Solar-driven water splitting is a promising route toward clean H2 energy and the photoelectrochemical approach attracts a strong interest. The oxygen evolution reaction is widely accepted as the performance limiting stage in this technology, which emphasizes the need of innovative anode materials. Metal oxide semiconductors are relevant in this respect owing to their cost-effectiveness and broad availability. The combination of chemical vapor deposition and atomic layer deposition was implemented in this study for the synthesis of randomly oriented CNT-ZnO core-shell nanostructures forming an adhering porous coating. Relative to a directly coated ZnO on Si, the porous structure enables a high interface area with the electrolyte and a resulting 458% increase of the photocurrent density under simulated solar light irradiation. The photoelectrochemical characterization correlates this performance to the effective electrons withdrawing along the carbon nanotubes (CNTs), and the resulting decrease of the onset potential. In terms of durability, the CNT-ZnO core–shell structure features an enhanced photo-corrosion stability for 8 h under illumination and with a voltage bias.
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Photocatalytic Dye Degradation and Biological Activities of Cu-Doped ZnSe Nanoparticles and Their Insights. WATER 2021. [DOI: 10.3390/w13182561] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Environmental nanotechnology has received much attention owing to its implications on environmental ecosystem, and thus is promising for the elimination of toxic elements from the aquatic surface. This work focuses on Cu-doped ZnSe nanoparticles using the co-precipitation method. The synthesized Cu-doped ZnSe nanoparticles were examined for structural, optical, and morphological properties with the help of XRD, FTIR, UV/vis diffuse reflection spectroscopy (DRS), FESEM, TEM, and XPS. The synthesized Cu-doped ZnSe nanoparticles revealed the presence of Cu2+ in the ZnSe lattice, which has been shown to take a predominant role for enhanced catalysis in the Cu-doped ZnSe nanoparticles. The synthesized Cu-doped ZnSe nanoparticles were investigated for their catalytic and antibacterial activities. The 0.1 M copper-doped ZnSe nanoparticles exhibited the highest rate of degradation against the methyl orange dye, which was found to be 87%. A pseudo-first-order kinetics was followed by Cu-doped ZnSe nanoparticles with a rate constant of 0.1334 min−1. The gram-positive and gram-negative bacteria were used for investigating the anti-bacterial activity of the Cu-doped ZnSe nanoparticles. The Cu-doped ZnSe nanoparticles exhibited enhanced photocatalytic and antibacterial activity.
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Surface photosensitization of ZnO by ZnS to enhance the photodegradation efficiency for organic pollutants. SN APPLIED SCIENCES 2021. [DOI: 10.1007/s42452-021-04643-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
AbstractIt is challenging to develop a material which has low cost, high activity, good stability and recyclability under light exposure. Apart from these properties, the photocatalyst should also have good visible region absorbance and low electron-hole pair recombination rate. Keeping all this in view, we have designed a simple scalable synthesis of ZnO–ZnS heterostructures for the photocatalytic treatment of industrial waste (p-nitrophenol and methyl orange). The ZnO–ZnS heterostructures are synthesized via a solvent-free route by thermal annealing of solid-state mixture of ZnO and thiourea (a sulphur source) which results in ZnO–ZnS core shell kind of heterostructure formation. The interface formation between the ZnO–ZnS heterostructure favored the band-gap reduction in comparison to the bare ZnO and ZnS nanoparticles. Further, these ZnO–ZnS heterostructures were utilized as a photocatalyst for the degradation of toxic phenolic molecules (p-nitrophenol) and harmful organic dyes (methyl orange) present in the water under the light exposure (> 390 nm).
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A Facile Urea-Assisted Thermal Decomposition Process of TiO2 Nanoparticles and Their Photocatalytic Activity. COATINGS 2021. [DOI: 10.3390/coatings11020165] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In the present work, we have reported a facile and large-scale synthesis of TiO2 nanoparticles (NPs) through urea-assisted thermal decomposition of titanium oxysulphate. We have successfully synthesized TiO2 NPs by using this effective route with different weight ratios of titanium oxysulphate: urea. The structures and properties of TiO2 NPs were confirmed by scanning electron microscope) (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), fourier transform infrared spectroscopy (FT-IR), ultra violet–visible spectroscopy (UV-vis), and photoluminescence (Pl) techniques. XRD demonstrated that TiO2 NPs holds of anatase crystal phase with crystallizing size 14–19 nm even after heating at 600 °C. TGA, SEM, and TEM images reveal urea’s role, which controls the size, morphology, and aggregation of TiO2 NPs during the thermal decomposition. These TiO2 NPs were employed for photodegradation of Methyl Orange (MO) in the presence of ultraviolet (UV) radiation. An interesting find was that the TiO2 NPs exhibited better photocatalytic activity and excellent recycling stability over several photodegradation cycles. Furthermore, the present method has a great perspective to be used as an efficient method for large-scale synthesis of TiO2 NPs.
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Gunjal AR, Kulkarni AK, Kawade UV, Sethi YA, Sonawane RS, Ook-Baeg J, Nagawade AV, Kale BB. A hierarchical SnS@ZnIn 2S 4 marigold flower-like 2D nano-heterostructure as an efficient photocatalyst for sunlight-driven hydrogen generation. NANOSCALE ADVANCES 2020; 2:2577-2586. [PMID: 36133357 PMCID: PMC9417497 DOI: 10.1039/d0na00175a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 04/16/2020] [Indexed: 06/14/2023]
Abstract
Herein, we report the in situ single-step hydrothermal synthesis of hierarchical 2D SnS@ZnIn2S4 nano-heterostructures and the examination of their photocatalytic activity towards hydrogen generation from H2S and water under sunlight. The photoactive sulfides rationally integrate via strong electrostatic interactions between ZnIn2S4 and SnS with two-dimensional ultrathin subunits, i.e. nanopetals. The morphological study of nano-heterostructures revealed that the hierarchical marigold flower-like structure is self-assembled via the nanopetals of ZnIn2S4 with few layers of SnS nanopetals. Surprisingly, it also showed that the SnS nanopetals with a thickness of ∼25 nm couple in situ with the nanopetals of ZnIn2S4 with a thickness of ∼25 nm to form a marigold flower-like assembly with intimate contact. Considering the unique band gap (2.0-2.4 eV) of this SnS@ZnIn2S4, photocatalytic hydrogen generation from water and H2S was performed under sunlight. SnS@ZnIn2S4 exhibits enhanced hydrogen evolution, i.e. 650 μmol h-1 g-1 from water and 6429 μmol h-1 g-1 from H2S, which is much higher compared to that of pure ZnIn2S4 and SnS. More significantly, the enhancement in hydrogen generation is 1.6-2 times more for H2S splitting and 6 times more for water splitting. SnS@ZnIn2S4 forms type I band alignment, which accelerates charge separation during the surface reaction. Additionally, this has been provoked by the nanostructuring of the materials. Due to the nano-heterostructure with hierarchical morphology, the surface defects increased which ultimately suppresses the recombination of the electron-hole pair. The above-mentioned facts demonstrate a significant improvement in the interface electron transfer kinetics due to such a unique 2D nano-heterostructure semiconductor which is responsible for a higher photocatalytic activity.
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Affiliation(s)
- Aarti R Gunjal
- Nanocrystalline Laboratory, Centre for Material for Electronic Technology (CMET), Department of Information Technology, Govt. of India Panchawati, Off Pashan Road Pune 411007 India +91 20 2589 8180 +91 20 2589 9273
- Dr John Barnabas Post-graduate School for Biological Studies, Ahmednagar College Ahmednagar India
| | - Aniruddha K Kulkarni
- Dr John Barnabas Post-graduate School for Biological Studies, Ahmednagar College Ahmednagar India
| | - Ujjwala V Kawade
- Nanocrystalline Laboratory, Centre for Material for Electronic Technology (CMET), Department of Information Technology, Govt. of India Panchawati, Off Pashan Road Pune 411007 India +91 20 2589 8180 +91 20 2589 9273
| | - Yogesh A Sethi
- Nanocrystalline Laboratory, Centre for Material for Electronic Technology (CMET), Department of Information Technology, Govt. of India Panchawati, Off Pashan Road Pune 411007 India +91 20 2589 8180 +91 20 2589 9273
| | - Ravindra S Sonawane
- Nanocrystalline Laboratory, Centre for Material for Electronic Technology (CMET), Department of Information Technology, Govt. of India Panchawati, Off Pashan Road Pune 411007 India +91 20 2589 8180 +91 20 2589 9273
| | - Jin Ook-Baeg
- Korean Research Institute of Chemical Technology 305-600 South Korea
| | - Arvind V Nagawade
- Dr John Barnabas Post-graduate School for Biological Studies, Ahmednagar College Ahmednagar India
| | - Bharat B Kale
- Nanocrystalline Laboratory, Centre for Material for Electronic Technology (CMET), Department of Information Technology, Govt. of India Panchawati, Off Pashan Road Pune 411007 India +91 20 2589 8180 +91 20 2589 9273
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MoSe2/ZnO/ZnSe hybrids for efficient Cr(VI) reduction under visible light irradiation. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(19)63484-4] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Kuehnel MF, Creissen CE, Sahm CD, Wielend D, Schlosser A, Orchard KL, Reisner E. ZnSe Nanorods as Visible-Light Absorbers for Photocatalytic and Photoelectrochemical H 2 Evolution in Water. Angew Chem Int Ed Engl 2019; 58:5059-5063. [PMID: 30715778 PMCID: PMC6492148 DOI: 10.1002/anie.201814265] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 02/02/2019] [Indexed: 11/06/2022]
Abstract
A precious-metal- and Cd-free photocatalyst system for efficient H2 evolution from aqueous protons with a performance comparable to Cd-based quantum dots is presented. Rod-shaped ZnSe nanocrystals (nanorods, NRs) with a Ni(BF4 )2 co-catalyst suspended in aqueous ascorbic acid evolve H2 with an activity up to 54±2 mmol H 2 gZnSe -1 h-1 and a quantum yield of 50±4 % (λ=400 nm) under visible light illumination (AM 1.5G, 100 mW cm-2 , λ>400 nm). Under simulated full-spectrum solar irradiation (AM 1.5G, 100 mW cm-2 ), up to 149±22 mmol H 2 gZnSe -1 h-1 is generated. Significant photocorrosion was not noticeable within 40 h and activity was even observed without an added co-catalyst. The ZnSe NRs can also be used to construct an inexpensive delafossite CuCrO2 photocathode, which does not rely on a sacrificial electron donor. Immobilized ZnSe NRs on CuCrO2 generate photocurrents of around -10 μA cm-2 in an aqueous electrolyte solution (pH 5.5) with a photocurrent onset potential of approximately +0.75 V vs. RHE. This work establishes ZnSe as a state-of-the-art light absorber for photocatalytic and photoelectrochemical H2 generation.
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Affiliation(s)
- Moritz F Kuehnel
- Christian Doppler Laboratory for Sustainable Syngas Chemistry, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.,Department of Chemistry, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
| | - Charles E Creissen
- Christian Doppler Laboratory for Sustainable Syngas Chemistry, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Constantin D Sahm
- Christian Doppler Laboratory for Sustainable Syngas Chemistry, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Dominik Wielend
- Christian Doppler Laboratory for Sustainable Syngas Chemistry, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Anja Schlosser
- Christian Doppler Laboratory for Sustainable Syngas Chemistry, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Katherine L Orchard
- Christian Doppler Laboratory for Sustainable Syngas Chemistry, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Erwin Reisner
- Christian Doppler Laboratory for Sustainable Syngas Chemistry, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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Kuehnel MF, Creissen CE, Sahm CD, Wielend D, Schlosser A, Orchard KL, Reisner E. ZnSe Nanorods as Visible‐Light Absorbers for Photocatalytic and Photoelectrochemical H
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Evolution in Water. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814265] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Moritz F. Kuehnel
- Christian Doppler Laboratory for Sustainable Syngas ChemistryDepartment of ChemistryUniversity of Cambridge Lensfield Road Cambridge CB2 1EW UK
- Department of ChemistrySwansea University Singleton Park Swansea SA2 8PP UK
| | - Charles E. Creissen
- Christian Doppler Laboratory for Sustainable Syngas ChemistryDepartment of ChemistryUniversity of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Constantin D. Sahm
- Christian Doppler Laboratory for Sustainable Syngas ChemistryDepartment of ChemistryUniversity of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Dominik Wielend
- Christian Doppler Laboratory for Sustainable Syngas ChemistryDepartment of ChemistryUniversity of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Anja Schlosser
- Christian Doppler Laboratory for Sustainable Syngas ChemistryDepartment of ChemistryUniversity of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Katherine L. Orchard
- Christian Doppler Laboratory for Sustainable Syngas ChemistryDepartment of ChemistryUniversity of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Erwin Reisner
- Christian Doppler Laboratory for Sustainable Syngas ChemistryDepartment of ChemistryUniversity of Cambridge Lensfield Road Cambridge CB2 1EW UK
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