Annealing effect on the optical and photoelectrochemical properties of lead oxide

Zerguine, Wided; Abdi, Djamila; Habelhames, Farid; Lakhdari, Meriem; Derbal-Habak, Hassina; Bonnassieux, Yvan; Tondelier, Denis; Choi, Jin‐Woo; Nunzi, Jean Michel

doi:10.1051/epjap/2018180263

Cited by 9 publications

(5 citation statements)

References 36 publications

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“…p-type behavior of PbO has been observed earlier 23 and the reason for p-and n-type behavior in undoped PbO was ascribed to various defects resulting in donor and acceptor states in the lattice (oxygen vacancies and Pb interstitials). 24 The as-prepared α-PbO films were stoichiometric and non-intentionally doped.…”

Section: Optical Studies-the Optical Transmittance Spectra Of a Sprayedmentioning

confidence: 66%

Photoelectrochemical Properties of α-PbO Films Prepared by Spray Pyrolysis

Bhagat

Waldiya

Mukhopadhyay

et al. 2019

J. Electrochem. Soc.

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Thin films of photoactive α-PbO have been prepared on fluorine doped tin oxide substrates using spray pyrolysis in the range of 380°C to 470°C. SEM showed the formation of interconnected PbO grains with increase in grain size at elevated temperature. The Raman peak at 147 cm −1 shows the formation of phase pure α-PbO. XPS indicates the phase purity of α-PbO as well as its stoichiometric nature. Photoelectrochemical studies of as-deposited α-PbO in 0.1 M potassium ferrocyanide (K 4 Fe(CN) 6 ) or potassium iodide (KI) at pH 9.2 under visible light irradiation showed photoanodic and photocathodic current, indicating nearly intrinsic behavior. Photocurrent spectra showed the presence of a semiconductor with an indirect bandgap of 1.9 eV. Doping by inducing oxygen deficiency through annealing in hydrogen and addition of 2 at. % In, shifted the onset potential to more negative values (down to −0.5 vs. Hg/HgO) in KI, indicating successful conversion into n-type semiconducting material. The In doped hydrogen annealed α-PbO shows a flatband potential of −0.58 V vs. Hg/HgO. The IPCE (incident photon to current conversion efficiency) in KI electrolyte was found to be 0.016 in the plateau region (0.6 V vs. Hg/HgO) at an incident wavelength of 532 nm.

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Section: Optical Studies-the Optical Transmittance Spectra Of a Sprayedmentioning

confidence: 66%

Photoelectrochemical Properties of α-PbO Films Prepared by Spray Pyrolysis

Bhagat

Waldiya

Mukhopadhyay

et al. 2019

J. Electrochem. Soc.

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“…It has been proven to be very effective in the treatment of e-waste [ 14 ]. It allows nanostructures to be deposited with a high degree of control [ 15 , 16 ]. The electrodeposition process is either totally ohmic-regulated or mixed ohmic-diffusion controlled depending on the concentration of Pb (II) ions [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Physical, Static, and Kinetic Analysis of the Electrochemical Deposition Process for the Recovery of Heavy Metal from Industrial Wastewater

et al. 2023

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Through the electrodeposition technique, toxic metals in wastewater can be removed and deposited on a chosen substrate with excellent selectivity. In this work, we use this technique to extract lead cations from simulated wastewater by using fluorine-doped tin oxide (FTO) substrate at various temperatures. In situ tracking of lead nucleation at advanced stages has been achieved by chronoamperometry. According to the experimental results, the theoretical models developed to study the kinetic growth of lead deposits in 2D and 3D are in good agreement. Nucleation rate and growth rate constants, for example, were found to be strongly influenced by temperature. Cottrell’s equation is used to calculate the diffusion coefficient. X-ray diffraction, scanning electron microscopy, and energy-dispersiveX-ray techniques were used to investigate and characterize the lead deposits. The reported results could provide insight into the optimization of electrodeposition processes for heavy metal recovery from wastewater and electronic wastes.

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“…The ED has been used to remove lead from different chemical baths among them, the sodium nitrate solution, considered as the most preferred system to deposit lead clusters onto different types of electrodes such as graphite [6], indium-tin-oxide (ITO) [7], platinum [8], silver [9], and lead foils [10. However, it is believed that one of the greatest challenges is to capture lead from baths containing small cationic precursor concentrations.…”

Section: Introductionmentioning

confidence: 99%

Analysis of growth mechanisms and microstructure evolution of Pb+2 minor concentrations by electrodeposition technique

2022

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In this study, the electrodeposition technique has been used to deposit low concentrations of highly toxic lead (Pb) cations into a solution of nitrate at a constant potential of -1V on fluorinedoped tin oxide electrodes (FTO). Monitoring of the reaction was conducted with the assistance of a computerized potentiostat/galvanostat setup, in cyclic voltammetry and in situ chronoamperometry modes. X-ray diffraction, scanning electron microscopy, energy dispersive X-Ray, and ultraviolet-visible spectroscopy techniques were used to examine the crystal structure, morphology, and optical properties of the lead deposits, respectively. Pb regular micro-hexagons have been identified; their size and density were significantly influenced by the cationic precursor's concentration. The correlation between the morphological and crystallographical structures of the electrodeposits was discussed. Based on chronoamperometric measurements, a mechanism for the growth of Pb deposits on FTO substrate has been proposed.Based on the reported results, electrodeposition processes of low heavy metals concentrations in contaminated water could be optimized using the eco-friendly electrodeposition technique.

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Annealing effect on the optical and photoelectrochemical properties of lead oxide

Cited by 9 publications

References 36 publications

Photoelectrochemical Properties of α-PbO Films Prepared by Spray Pyrolysis

Photoelectrochemical Properties of α-PbO Films Prepared by Spray Pyrolysis

Physical, Static, and Kinetic Analysis of the Electrochemical Deposition Process for the Recovery of Heavy Metal from Industrial Wastewater

Analysis of growth mechanisms and microstructure evolution of Pb+2 minor concentrations by electrodeposition technique

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