The effect of Co and Mn Co-Doping on structural and optical properties of ZnO thin films

Demircan, Gökhan; Yalçın, Şerife Pınar; Alivi, Kamer; Ceyhan, Gökhan; Açıkgöz, Abuzer; Balak, Mehmet Vehbi; Aktaş, Bülent; Das, Ruken

doi:10.1016/j.optmat.2022.112163

Cited by 40 publications

(12 citation statements)

References 63 publications

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“…Previous studies also confirmed the positive effect of Co on the distribution of ZnO nanograins as well as the adsorption of H 2 S. 50−52 It is found that increased Co concentration is beneficial for the reduction in particle size because Co 2+ is an alternative to Zn 2+ and the ionic radius of Co 2+ is lower than that of Zn 2+ and a reduced nucleation rate of the composited metal oxides. 53,54 A similar phenomenon has also been observed and discussed. 5,55,56 Yang et al 4 concluded that the coexistence of Zn and Co in the sorbents could significantly enhance the H 2 S removal performance.…”

Section: ■ Results and Discussionsupporting

confidence: 74%

“…More importantly, Co is beneficial for the desulfurization reaction in thermodynamics and the acceleration of surface reaction kinetics, even though the sulfur capacity of Co per unit is lower than that of Zn. Previous studies also confirmed the positive effect of Co on the distribution of ZnO nanograins as well as the adsorption of H 2 S. − It is found that increased Co concentration is beneficial for the reduction in particle size because Co 2+ is an alternative to Zn 2+ and the ionic radius of Co 2+ is lower than that of Zn 2+ and a reduced nucleation rate of the composited metal oxides. , A similar phenomenon has also been observed and discussed. ,, Yang et al concluded that the coexistence of Zn and Co in the sorbents could significantly enhance the H 2 S removal performance. The enhanced sulfur capacity is attributed to the enlarged specific surface area and decreased nanograin size.…”

Section: Resultsmentioning

confidence: 61%

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Bimetallic-MOF-Derived Zn_xCo_3–xO₄/Carbon Nanofiber Composited Sorbents for High-Temperature Coal Gas Desulfurization

Zhang

et al. 2022

Environ. Sci. Technol.

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Desulfurization sorbent with a high active component utilization is of importance for the removal of H 2 S from coal gas at high temperatures. Thus, the hypothesis for producing Zn x Co 3−x O 4 /carbon nanofiber sorbents via the combinations of electrospinning, in situ hydrothermal growth, and carbonization technique has been rationally constructed in this study. Zn x Co 3−x O 4 nanoparticles derived from metal−organic frameworks are uniformly loaded on the electrospun carbon nanofibers (CNFs) with high dispersion. Zn x Co 3−x O 4 /CNFs sorbents possess the highest breakthrough sulfur adsorption capacity (12.4 g S/100 g sorbent) and an excellent utilization rate of the active component (83.2%). The excellent performance of Zn x Co 3−x O 4 /CNFs can be attributed to the synergetic effect of the hierarchical structure and widely distributed Zn x Co 3−x O 4 on the CNFs supporter. The decomposition of Zn/Co−ZIFs not only generates the nucleus of oxides but also realizes their physical isolation through the formation of carbon grids on the surface of CNFs, avoiding the aggregation of oxides. Furthermore, Zn x Co 3−x O 4 /CNFs sorbents show an overwhelming superiority over the ZnO/CNFs sorbent, which is attributed to the introduction of Co and then the promotion of the stability of Zn at high temperatures. The presence of Co also accelerates the adsorption of H 2 S on the active site of the oxide surface. The presented method is beneficial for promoting desulfurization performances and producing sorbents with high utilization of active components.

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Section: ■ Results and Discussionsupporting

confidence: 74%

Section: Resultsmentioning

confidence: 61%

Bimetallic-MOF-Derived Zn_xCo_3–xO₄/Carbon Nanofiber Composited Sorbents for High-Temperature Coal Gas Desulfurization

Zhang

et al. 2022

Environ. Sci. Technol.

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“…The bandgap energies for Bi 2 O 3 /Ag 2 O are 2.1 eV. When compared to the bulk band gap, redshift was observed in three sample's band gaps showed red-shift, and value of the red-shift uctuated depending on the morphology [30]. This morphological value discrepancy may have caused by native defects presence inthe nanocomposite having rod shape.…”

Section: In-vitro Cytotoxicity Assay Of Hct116mentioning

confidence: 90%

Microwave assisted hydrothermal synthesis of Bi2O3 /Ag2O heterostructures with highly enhanced photocatalysis and their biological interest

Ramakrishnegowda

Ramesh

Purushotham

et al. 2022

Preprint

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A methodological analysis is made in the rational synthesis of the Bi2O3/Ag2O nanostructure with significant application, possessing substantial electron-hole recombination acting as solar catalysts through powerful and modest hydrothermal technique. The composite Bi2O3/Ag2O is intermediary for single step Methyl Red (MR) dye photocatalytic degradation. Under the impact of solar irradiation heavy metals like, Lead (Pb) are also removed by the synthesized material surface influence of sunlight. Anti-cancer activity upon Colon cancer cells (HCT116) is achieved with excellent cell viability and IC50 value. The research work or the present study found an excellent and efficient design of photocatalyst as an eco-friendly and biomedical approach.

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“…ZnO is a TOC thin film, so it is favorite for use in solar cells, optoelectronics, flat panel displays, and gas sensors 3,4 . However, it is worth noting that the electrical properties of undoped ZnO are insufficient to meet the growing demand for fabricating high‐performance semiconductor devices 5 . Since the current transparent electrodes (TE) market is dominated by tin‐doped indium oxide (ITO), of which indium is the main component, and is very expensive, a lot of research work is being done to produce ZnO‐based (TE).…”

Section: Introductionmentioning

confidence: 99%

“…3,4 However, it is worth noting that the electrical properties of undoped ZnO are insufficient to meet the growing demand for fabricating highperformance semiconductor devices. 5 Since the current transparent electrodes (TE) market is dominated by tin-doped indium oxide (ITO), of which indium is the main component, and is very expensive, a lot of research work is being done to produce ZnO-based (TE). Cost factors motivate researchers to look for alternative TE materials.…”

Section: Introductionmentioning

confidence: 99%

Impact of composition on microstructural, electrical and optical properties of ZnO thin films incorporation by In ₂ O ₃ for solar cells

Ahmed

Bakry

Shaaban

2022

Intl J of Energy Research

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Summary We report in deposition of highly transparent and conductive thin layers of ZnO‐In2O3 by the electron beam gun. The effects of the composition of (ZnO)(1 − x)(In2O3)x (x = 0, 2, 4, 6, 8, 10 at%) films on the structure and physical properties were investigated. The films were strongly oriented along the (002) plane. The X‐ray diffraction analysis showed that as the In2O3 content increases to 6% of the doping level, the grain size increases and the lattice decreases, and then reverse occurs at 8% to 10% of In2O3 content. The surface of the ZnO‐In2O3 thin films was examined by the atomic force microscopy. By constructing a three‐layer model to analyze the spectroscopic ellipsometry experimental data, the optical parameters and energy gap were extracted. As the In2O3 content increased, the energy gap decreased from 3.37 to 3.312 at the expense of ZnO. The electrical characteristics of the (ZnO)(1 − x)(In2O3)x films were measured using the four‐point probe method. We show that the resistivity and sheet resistance of (ZnO)(1 − x)(In2O3)x decrease with increasing the In2O3 concentration. The resistivity was found to attain minimum value of 4.5 × 0−4 Ω cm and sheet resistance of 45 Ω/sq at 6% of the In2O3 content. The carrier concentration and the carrier mobility increase with In2O up to 6% of the doping level of In2O3 and then decreases. The presented physical properties of the grown (ZnO)0.94((In2O3)0.06 films recommend it for optoelectronic and solar cell applications.

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The effect of Co and Mn Co-Doping on structural and optical properties of ZnO thin films

Cited by 40 publications

References 63 publications

Bimetallic-MOF-Derived Zn_xCo_3–xO₄/Carbon Nanofiber Composited Sorbents for High-Temperature Coal Gas Desulfurization

Bimetallic-MOF-Derived Zn_xCo_3–xO₄/Carbon Nanofiber Composited Sorbents for High-Temperature Coal Gas Desulfurization

Microwave assisted hydrothermal synthesis of Bi2O3 /Ag2O heterostructures with highly enhanced photocatalysis and their biological interest

Impact of composition on microstructural, electrical and optical properties of ZnO thin films incorporation by In ₂ O ₃ for solar cells

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The effect of Co and Mn Co-Doping on structural and optical properties of ZnO thin films

Cited by 40 publications

References 63 publications

Bimetallic-MOF-Derived ZnxCo3–xO4/Carbon Nanofiber Composited Sorbents for High-Temperature Coal Gas Desulfurization

Bimetallic-MOF-Derived ZnxCo3–xO4/Carbon Nanofiber Composited Sorbents for High-Temperature Coal Gas Desulfurization

Microwave assisted hydrothermal synthesis of Bi2O3 /Ag2O heterostructures with highly enhanced photocatalysis and their biological interest

Impact of composition on microstructural, electrical and optical properties of ZnO thin films incorporation by In 2 O 3 for solar cells

Contact Info

Product

Resources

About

Bimetallic-MOF-Derived Zn_xCo_3–xO₄/Carbon Nanofiber Composited Sorbents for High-Temperature Coal Gas Desulfurization

Bimetallic-MOF-Derived Zn_xCo_3–xO₄/Carbon Nanofiber Composited Sorbents for High-Temperature Coal Gas Desulfurization

Impact of composition on microstructural, electrical and optical properties of ZnO thin films incorporation by In ₂ O ₃ for solar cells