Visible-light-driven photo-enhanced zinc–air batteries using synergistic effect of different types of MnO<sub>2</sub> nanostructures

Mathur, Asha; Kaushik, Ravinder; Halder, Aditi

doi:10.1039/d0cy01581d

Cited by 24 publications

(15 citation statements)

References 49 publications

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“…As shown in Figure a, XPS survey spectra confirm the presence of Ti and O in TNRs and Bi, Ti, and O in all BTRs samples. The presence of carbon could be attributed to the adventitious or instrumental carbon Figure b shows the core-level spectra of Ti 2p and Bi 4d for TNRs and 20-BTRs catalysts.…”

Section: Resultsmentioning

confidence: 99%

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Photoelectrochemical Degradation of Organic Pollutants Coupled with Molecular Hydrogen Generation Using Bi₂O₃/TiO₂ Nanoparticle Arrays

Kaushik

Gandhi

Halder

2023

ACS Appl. Nano Mater.

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The growing world population is closely associated with the increased demand of safe drinking water and sustainable energy production. This drives the focus of the scientific community to work toward water remediation and clean energy generation. The combination of photoelectrooxidation of pollutants at the anode with simultaneous hydrogen gas production at the cathode is a smart strategy to address these problems. Herein, we have designed a bifunctional photoelectrocatalytic system consisting of a self-standing photoanode to degrade the water pollutant molecules with simultaneous production of molecular hydrogen at the cathode. The photoanode was prepared by coating Bi2O3 over the surface of self-standing TiO2 nanorods. Thus, prepared photoelectrodes show high degradation efficiency for rhodamine molecules, where direct oxidation of rhodamine by the holes generated under solar light illumination was detrimental for its activity. During simultaneous pollutant removal and energy production experiments, the anode shows 100% degradation of pollutant molecules while the cathode shows high hydrogen gas production (128 mM cm–2 h–1). The prepared composite showed higher efficiency of visible-light absorbance, high charge generation capability, and low charge transfer resistance at the interface as determined via several characterizations, compared to the bare titania. The catalyst is easy to prepare and robust in activity for several kinds of pollutant molecules tested. Its robust activity, high stability, and durability open up an avenue for the wastewater treatment with simultaneous renewable energy production technologies.

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Section: Resultsmentioning

confidence: 99%

“…The presence of carbon could be attributed to the adventitious or instrumental carbon. 49 Figure 3b shows the core-level spectra of Ti 2p and Bi 4d for TNRs and 20-BTRs catalysts. From the XPS spectra of 20-BTRs, it has been observed that both Ti 2p and Bi 4d are having overlapping peaks, which are difficult to analyze.…”

mentioning

confidence: 99%

Photoelectrochemical Degradation of Organic Pollutants Coupled with Molecular Hydrogen Generation Using Bi₂O₃/TiO₂ Nanoparticle Arrays

Kaushik

Gandhi

Halder

2023

ACS Appl. Nano Mater.

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“…Various approaches have been adopted in order to decrease this large electric bias. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] They will be reviewed here below.…”

Section: Operation Principle Of Zn-air Batteriesmentioning

confidence: 99%

A brief review on solar charging of Zn–air batteries

Lianos

2023

Phys. Chem. Chem. Phys.

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“…13 The Halder and Sawangphruk group also reported the importance of photoactive materials in enhancing the performances of the Zn−air batteries. 14 On the other hand, replacing the liquid electrolyte with the solid polymer electrolyte is an interesting approach to manage the abovementioned difficulties. Gel-based electrolytes will significantly help in preventing the accumulation of reaction products on the electrode surface and increasing the oxygen distribution, ultimately enhancing Li−O 2 battery efficiency.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Liu et al utilized solar energy to improve the OER rates in the Zn–air battery . The Halder and Sawangphruk group also reported the importance of photoactive materials in enhancing the performances of the Zn–air batteries. , …”

Section: Introductionmentioning

confidence: 99%

Highly Stable Spinel Oxide Cathode for Rechargeable Li–O₂ Batteries in Non-Aqueous Liquid and Gel-Based Electrolytes

Naik

2021

ACS Appl. Energy Mater.

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Metal−air batteries are receiving interest as they provide higher theoretical specific energy compared to the commercial lithium-ion batteries with two interacalation electrodes. In this, lithium−oxygen (Li−O 2 ) batteries are among the most promising candidates for the electrical vehicles because of their ability in holding the large amount of energy density by reacting with atmospheric air oxygen as the cathode reactant. The few problems that need to be overcome for the use of these batteries are capacity fading by the accumulation of discharge products (e.g., Li 2 O 2 ) on the electrode and stagnant electrode reactions. Hence, here, we synthesized a lowcost bimetallic spinel oxide NiFe 2 O 4 electrocatalyst via a simple modified hydrothermal method for Li−O 2 batteries as the cathode material in non-aqueous liquid and polymer gel electrolytes. The bifunctional NiFe 2 O 4 catalyst exhibited a high discharge capacity, better cyclic stability (100 cycles at current densities up to 1500 mA g −1 and constant capacities of 1000 and 500 mA h g −1 ) and low overpotential. The enhanced performance of the battery is due to the presence of the multivalent bimetallic Ni and Fe metals in the catalyst.

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Visible-light-driven photo-enhanced zinc–air batteries using synergistic effect of different types of MnO₂ nanostructures

Abstract: Crystalline phases along with the morphology of any semiconducting material are the key factors which govern its photocatalytic properties. Herein, we have prepared a composite of α- and δ-MnO2 with...

Cited by 24 publications

References 49 publications

Photoelectrochemical Degradation of Organic Pollutants Coupled with Molecular Hydrogen Generation Using Bi₂O₃/TiO₂ Nanoparticle Arrays

Photoelectrochemical Degradation of Organic Pollutants Coupled with Molecular Hydrogen Generation Using Bi₂O₃/TiO₂ Nanoparticle Arrays

A brief review on solar charging of Zn–air batteries

Highly Stable Spinel Oxide Cathode for Rechargeable Li–O₂ Batteries in Non-Aqueous Liquid and Gel-Based Electrolytes

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Visible-light-driven photo-enhanced zinc–air batteries using synergistic effect of different types of MnO2 nanostructures

Abstract: Crystalline phases along with the morphology of any semiconducting material are the key factors which govern its photocatalytic properties. Herein, we have prepared a composite of α- and δ-MnO2 with...

Cited by 24 publications

References 49 publications

Photoelectrochemical Degradation of Organic Pollutants Coupled with Molecular Hydrogen Generation Using Bi2O3/TiO2 Nanoparticle Arrays

Photoelectrochemical Degradation of Organic Pollutants Coupled with Molecular Hydrogen Generation Using Bi2O3/TiO2 Nanoparticle Arrays

A brief review on solar charging of Zn–air batteries

Highly Stable Spinel Oxide Cathode for Rechargeable Li–O2 Batteries in Non-Aqueous Liquid and Gel-Based Electrolytes

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Product

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About

Visible-light-driven photo-enhanced zinc–air batteries using synergistic effect of different types of MnO₂ nanostructures

Photoelectrochemical Degradation of Organic Pollutants Coupled with Molecular Hydrogen Generation Using Bi₂O₃/TiO₂ Nanoparticle Arrays

Photoelectrochemical Degradation of Organic Pollutants Coupled with Molecular Hydrogen Generation Using Bi₂O₃/TiO₂ Nanoparticle Arrays

Highly Stable Spinel Oxide Cathode for Rechargeable Li–O₂ Batteries in Non-Aqueous Liquid and Gel-Based Electrolytes