Photoelectrochemical performance of MWCNT–Ag–ZnO ternary hybrid: a study of Ag loading and MWCNT garnishing

Desai, Mangesh A.; Sharma, Vidhika; Prasad, Mohit; Gund, Girish S.; Jadkar, Sandesh; Sartale, Shrikrishna D.

doi:10.1007/s10853-021-05821-5

Cited by 12 publications

(7 citation statements)

References 57 publications

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“…32 Therefore, MnO 2 can be synthesized using different reducing agents. 33,37 The successive ionic layer adsorption and reaction (SILAR) is a cost-effective, binderless, and additive-free room temperature chemical synthesis approach, in which growth rate can be easily monitored, and a variety of nanostructures can be produced. 34−36 It is well-known that room temperature synthesis can produce an amorphous phase of MnO 2 , which has higher surface area than that of the crystalline phase leading to better specific capacitance values.…”

Section: ■ Introductionmentioning

confidence: 99%

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SILAR Grown K⁺ and Na⁺ Ions Preinserted MnO₂ Nanostructures for Supercapacitor Applications: A Comparative Study

Desai

Kulkarni

Gund³

et al. 2021

Energy Fuels

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Herein we have demonstrated facile synthesis approach to grow K + and Na + ions preinserted MnO 2 (K x MnO 2 and Na x MnO 2 ) nanostructured thin films with the help of successive ionic layer adsorption and reaction (SILAR) method. K x MnO 2 and Na x MnO 2 thin films were grown directly on the stainless-steel substrate at room temperature using different reducing agents like manganese sulfate (MnSO 4 ) and sodium borohydride (NaBH 4 ). Reducing agents control reduction of MnO 4− ions, morphological evolution, and preinsertion of Na + ions in MnO 2 matrix. The plausible growth mechanism was proposed behind the occurrence of different morphologies. Due to preinsertion of alkali ions, nonstoichiometric MnO 2 phase was formed and confirmed by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy studies. The electrochemical measurements of Na x MnO 2 thin films demonstrated and 1.45 times superior specific capacitance at a higher scan rate (100 mV/s) and current density (32 A/g) than those of K x MnO 2 thin films. Enhanced surface capacitance of Na x MnO 2 thin films corresponds to superior electric double layer capacitance (EDLC) and surface redox reactions between Mn 3+ /Mn 4+ ions. On the contrary, K x MnO 2 thin films showed higher diffusion controlled reactions, which were supported by electrochemical impedance spectroscopy (EIS) data. Insertion of Na + ions was found to be advantageous over K + ions, because it provides higher specific capacitance values, specific morphology, improved capacitive retention, accessibility of more electroactive area, stable salt concentration and electrical conductivity of the electrolyte, fast and dynamic utilization of electrode material and higher conservation of energy.

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Section: ■ Introductionmentioning

confidence: 99%

“…On this background, the reducing agent is also used as a growth modifier for tuning morphology of the nanostructures . Therefore, MnO 2 can be synthesized using different reducing agents. , …”

Section: Introductionmentioning

confidence: 99%

SILAR Grown K⁺ and Na⁺ Ions Preinserted MnO₂ Nanostructures for Supercapacitor Applications: A Comparative Study

Desai

Kulkarni

Gund³

et al. 2021

Energy Fuels

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“…The calculated carrier densities from the MS slopes were 2.60 × 10 18 and 1.89 × 10 19 for pure BTO and BTO/AgNPs thin films, respectively. It is well-known that larger carrier densities are good for improved catalytic performance . Therefore, BTO/AgNPs exhibited a higher carrier density than pure BTO, thus suggesting improved charge separation and piezo-photocatalytic activity.…”

Section: Resultsmentioning

confidence: 96%

“…It is well-known that larger carrier densities are good for improved catalytic performance. 69 Therefore, BTO/AgNPs exhibited a higher carrier density than pure BTO, thus suggesting improved charge separation and piezo-photocatalytic activity.…”

Section: Resultsmentioning

confidence: 97%

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Thin Films (FTO/BaTiO₃/AgNPs) for Enhanced Piezo-Photocatalytic Degradation of Methylene Blue and Ciprofloxacin in Wastewater

Masekela

Hintsho‐Mbita

Ntsendwana³

et al. 2022

ACS Omega

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In this study, we investigate the ability of barium titanate/silver nanoparticles (BaTiO 3 /AgNPs) composites deposited on a fluorine-doped tin oxide (FTO) glass using tape-casting method to produce piezoelectric thin film (FTO/BaTiO 3 /AgNPs) for piezocatalytic, photocatalytic, and piezo-photocatalytic degradation of methylene blue (MB) and ciprofloxacin (CIP) in wastewater. The prepared piezoelectric materials (BaTiO 3 and BaTiO 3 /AgNPs) were characterized using XRD, SEM, TEM, EDS, UV-DRS, TGA, PL, BET, EIS, and chronoamperometry. The UV-DRS showed the surface plasmon resonance (SPR) of Ag nanoparticles on the surface of BaTiO 3 at a wavelength of 505 nm. The TEM images revealed the average Ag nanoparticle size deposited on the surface of BaTiO 3 to be in the range of 10–15 nm. The chronoamperometry showed that the photoreduction of silver nanoparticles (AgNPs) onto BaTiO 3 (BTO) resulted in a piezo-electrochemical current enhancement from 0.24 to 0.38 mA. The composites (FTO/BaTiO 3 /AgNPs) achieved a higher degradation of MB and CIP when the photocatalysis and piezocatalysis processes were merged. Under both ultrasonic vibration and UV light exposure, FTO/BTO/AgNPs degraded about 72 and 98% of CIP and MB from wastewater, respectively. These piezoelectric thin films were shown to be efficient and reusable even after five cycles, suggesting that they are highly stable. Furthermore, the reactive oxygen species studies demonstrated that hydroxyl radicals (·OH) were the most effective species during degradation of MB, with minor superoxide radicals (·O 2 – ) and holes (h + ). From this study, we were able to show that these materials can be used as multifunctional materials as they were able to degrade both the dye and pharmaceutical pollutants. Moreover, they were more efficient through the piezo-photocatalytic process.

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Plasmonic Metal Nanoparticles Decorated ZnO Nanostructures for Photoelectrochemical (PEC) Applications

Desai

Sartale

2021

Chemically Deposited Nanocrystalline Metal Oxide Thin Films

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Photoelectrochemical performance of MWCNT–Ag–ZnO ternary hybrid: a study of Ag loading and MWCNT garnishing

Cited by 12 publications

References 57 publications

SILAR Grown K⁺ and Na⁺ Ions Preinserted MnO₂ Nanostructures for Supercapacitor Applications: A Comparative Study

SILAR Grown K⁺ and Na⁺ Ions Preinserted MnO₂ Nanostructures for Supercapacitor Applications: A Comparative Study

Thin Films (FTO/BaTiO₃/AgNPs) for Enhanced Piezo-Photocatalytic Degradation of Methylene Blue and Ciprofloxacin in Wastewater

Plasmonic Metal Nanoparticles Decorated ZnO Nanostructures for Photoelectrochemical (PEC) Applications

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Photoelectrochemical performance of MWCNT–Ag–ZnO ternary hybrid: a study of Ag loading and MWCNT garnishing

Cited by 12 publications

References 57 publications

SILAR Grown K+ and Na+ Ions Preinserted MnO2 Nanostructures for Supercapacitor Applications: A Comparative Study

SILAR Grown K+ and Na+ Ions Preinserted MnO2 Nanostructures for Supercapacitor Applications: A Comparative Study

Thin Films (FTO/BaTiO3/AgNPs) for Enhanced Piezo-Photocatalytic Degradation of Methylene Blue and Ciprofloxacin in Wastewater

Plasmonic Metal Nanoparticles Decorated ZnO Nanostructures for Photoelectrochemical (PEC) Applications

Contact Info

Product

Resources

About

SILAR Grown K⁺ and Na⁺ Ions Preinserted MnO₂ Nanostructures for Supercapacitor Applications: A Comparative Study

SILAR Grown K⁺ and Na⁺ Ions Preinserted MnO₂ Nanostructures for Supercapacitor Applications: A Comparative Study

Thin Films (FTO/BaTiO₃/AgNPs) for Enhanced Piezo-Photocatalytic Degradation of Methylene Blue and Ciprofloxacin in Wastewater