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Synthesis and characterization of high-quality PbI2 nanopowders from depleted SLA accumulator anode and cathode.

Malevu, T.D.; Ocaya, R.O.; Tshabalala, K.G.; Fernandez, C.

Authors

T.D. Malevu

R.O. Ocaya

K.G. Tshabalala

C. Fernandez



Abstract

High-quality lead iodide (PbI2) nanoparticles were synthesized from both anode and cathode of a discarded sealed lead-acid accumulator as starting materials. The structure, morphology, chemical composition and optical properties of washed PbI2 were investigated using X-ray diffraction, field emission scanning electron microscope, photoluminescence and energy-dispersive X-ray spectrometer. The XRD measurements indicated the presence of pure hexagonal PbI2 nanoparticles. Application of the Scherrer equation indicates crystal sizes between 13.703 and 14.320 nm. SEM indicated the presence of spherical particle agglomerations between 1.5 and 3.5 'm in diameter. The measured band gap using two methods was consistent at 2.75 eV. EDS results suggest the absence of impurities in the synthesized nanoparticles. The overall results suggest that discarded sealed lead-acid accumulators can source pure hexagonal-phase lead iodide nanoparticles with potential applications in perovskite solar cells. The novelty aspect is that this approach has not been previously reported.

Journal Article Type Article
Publication Date Jul 1, 2016
Journal Applied physics A: materials science and processing
Print ISSN 0947-8396
Electronic ISSN 1432-0630
Publisher Springer (part of Springer Nature)
Peer Reviewed Peer Reviewed
Volume 122
Article Number 630
Institution Citation MALEVU, T.D., OCAYA, R.O., TSHABALALA, K.G. and FERNANDEZ, C. 2016. Synthesis and characterization of high-quality PbI2 nanopowders from depleted SLA accumulator anode and cathode. Applied physics A: materials science and processing [online], 122, article 630. Available from: https://doi.org/10.1007/s00339-016-0158-9
DOI https://doi.org/10.1007/s00339-016-0158-9
Keywords Perovskite solar cell; Iodide ion; Lead iodide; PbO nanoparticles; Lead dioxide; Band gap; Bulk crystal growth; Diffraction; Crystallisation; Crystallite size; Emission intensity; Optical absorption

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