Preparing a dual-function BiVO<sub>4</sub>/NiFe-LDH composite photoanode for enhanced photoelectrocatalytic wastewater treatment and simultaneous hydrogen evolution

Cong, Sumin; Yu, Jiuheng; Liu, Baojun; Teng, Wei; Tang, Yubin

doi:10.1039/d2nj02210a

Cited by 6 publications

(4 citation statements)

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“…Cong et al used a BiVO 4 /NiFe photoanode for photoelectrocatalytic (PEC tetracycline (TC)) degradation with simultaneous cathodic hydrogen production. 15 Qin et al showed the utilization of NiMoO 4 and its reduced derivative for the simultaneous phenol oxidation and the hydrogen evolution reaction (HER) at the anode and cathode, respectively. 16 The performance of a good photoelectrocatalyst depends upon the nature of photoelectrode materials used.…”

Section: Introductionmentioning

confidence: 99%

“…It has the ability to address the drawbacks of conventional photocatalysis and electrocatalysis. Cong et al used a BiVO 4 /NiFe photoanode for photoelectrocatalytic (PEC tetracycline (TC)) degradation with simultaneous cathodic hydrogen production . Qin et al showed the utilization of NiMoO 4 and its reduced derivative for the simultaneous phenol oxidation and the hydrogen evolution reaction (HER) at the anode and cathode, respectively …”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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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“…Mott–Schottky analysis was performed to the determine the band edge potential and constructive charge transfer pathway of the materials, − as demonstrated in Figure S10. The detailed explanation has been provided in the Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

In Situ Synthesis of Nanostructured Composites of NiFe Layered Double Hydroxide and Polyaniline for Photocatalytic Degradation of Organic Pollutants and Remediation of Biological Contaminants

Sarkar,

Kumari,

Jagadevan

et al. 2023

ACS Appl. Nano Mater.

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The present work discusses on the development of a solid-state mediator Ag0-based-Z-scheme LDH/PANI/MAA/Ag heterojunction nanocomposite with an intimate morphological contact interface through an electrostatic self-assembly strategy. Here, an Ag0-decorated layered double hydroxide (LDH) nanosheet-based polymeric nanocomposite has been synthesized by ultrasonic treatment of NiFe LDH with aniline followed by in situ polymerization-stabilization and adsorption-reduction of Ag+ ions at low temperatures. In this synthesis, a mercaptoacetic acid (MAA)-functionalized polyaniline (PANI) promotes the exfoliation of NiFe LDH and stabilizes the nanosheets (LDH) followed by successful adsorption-reduction of Ag+ ions by its chelating groups to Ag0. The synthesized ternary photocatalyst displayed an enhanced photocatalytic degradation of emerging pollutants (Ciprofloxacin: 97.4%, Reactive Blue 4: 97.7%, and Safranin: 93.1% of degradation) under sunlight irradiation within 80 min. The enhanced photocatalytic performance of the LDH/PANI/MAA/Ag nanocomposite indicates a synergistic effect on electron transfer over components, which is systematically identified by the delayed electron–hole recombination as supported by photoluminescence and electrochemical impedance spectroscopy measurements as well as photostability of the material supported by the chronoamperometry analysis. The synthesized LDH/PANI/MAA/Ag nanocomposite possesses a large specific surface area and an excellent interface between LDH nanosheets, PANI/MAA, and Ag0, which has been confirmed from the N2 sorption isotherm, transmission electron microscopy, and high-resolution transmission electron microscopy studies. In addition, the antibacterial potential against Bacillus pumilus (Gram-positive) and Escherichia coli (Gram-negative) bacteria authenticates further advancement of the LDH/PANI/MAA/Ag nanocomposite as a potent material composition.

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“…Certain LDHs have been successfully deposited on BiVO 4 photoanodes as OER co-catalysts to improve PEC water splitting performance. For instance, integrating NiCo-or NiFe-LDHs with BiVO 4 photoanodes has been demonstrated to significantly increase the photocurrent density, surpassing that of the unmodified BiVO 4 photoanode by several folds [38][39][40][41]. Meanwhile, constructing heterojunctions between CdS and BiVO 4 semiconductors has been effective in improving the separation and transfer efficiencies of photogenerated charge carriers [42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Promoting the Photoelectrochemical Properties of BiVO4 Photoanode via Dual Modification with CdS Nanoparticles and NiFe-LDH Nanosheets

Dong,

Chen,

Kou

et al. 2024

Nanomaterials

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Bismuth vanadate (BiVO4) has long been considered a promising photoanode material for photoelectrochemical (PEC) water splitting. Despite its potential, significant challenges such as slow surface water evolution reaction (OER) kinetics, poor carrier mobility, and rapid charge recombination limit its application. To address these issues, a triadic photoanode has been fabricated by sequentially depositing CdS nanoparticles and NiFe-layered double hydroxide (NiFe-LDH) nanosheets onto BiVO4, creating a NiFe-LDH/CdS/BiVO4 composite. This newly engineered photoanode demonstrates a photocurrent density of 3.1 mA cm−2 at 1.23 V vs. RHE in 0.1 M KOH under AM 1.5 G illumination, outperforming the singular BiVO4 photoanode by a factor of 5.8 and the binary CdS/BiVO4 and NiFe-LDH/BiVO4 photoanodes by factors of 4.9 and 4.3, respectively. Furthermore, it exhibits significantly higher applied bias photon-to-current efficiency (ABPE) and incident photon-to-current efficiency (ICPE) compared to pristine BiVO4 and its binary counterparts. This enhancement in PEC performance is ascribed to the formation of a CdS/BiVO4 heterojunction and the presence of a NiFe-LDH OER co-catalyst, which synergistically facilitate charge separation and transfer efficiencies. The findings suggest that dual modification of BiVO4 with CdS and NiFe-LDH is a promising approach to enhance the efficiency of photoanodes for PEC water splitting.

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Preparing a dual-function BiVO₄/NiFe-LDH composite photoanode for enhanced photoelectrocatalytic wastewater treatment and simultaneous hydrogen evolution

Abstract: BiVO4/NiFe was synthesized on Ni foam by simple hydrothermal method and successive ion layer absorption and reaction (SILAR) method. The BiVO4/NiFe electrode was used as photoanode for photoelectrocatalytic (PEC) degradation...

Cited by 6 publications

References 70 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

In Situ Synthesis of Nanostructured Composites of NiFe Layered Double Hydroxide and Polyaniline for Photocatalytic Degradation of Organic Pollutants and Remediation of Biological Contaminants

Promoting the Photoelectrochemical Properties of BiVO4 Photoanode via Dual Modification with CdS Nanoparticles and NiFe-LDH Nanosheets

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Preparing a dual-function BiVO4/NiFe-LDH composite photoanode for enhanced photoelectrocatalytic wastewater treatment and simultaneous hydrogen evolution

Abstract: BiVO4/NiFe was synthesized on Ni foam by simple hydrothermal method and successive ion layer absorption and reaction (SILAR) method. The BiVO4/NiFe electrode was used as photoanode for photoelectrocatalytic (PEC) degradation...

Cited by 6 publications

References 70 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

In Situ Synthesis of Nanostructured Composites of NiFe Layered Double Hydroxide and Polyaniline for Photocatalytic Degradation of Organic Pollutants and Remediation of Biological Contaminants

Promoting the Photoelectrochemical Properties of BiVO4 Photoanode via Dual Modification with CdS Nanoparticles and NiFe-LDH Nanosheets

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Preparing a dual-function BiVO₄/NiFe-LDH composite photoanode for enhanced photoelectrocatalytic wastewater treatment and simultaneous hydrogen evolution

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