Structural and electrical features induced by the leaching procedures on the LiNbO<sub>3</sub>crystalline powder samples

Piecha, Julita; Dabioch, Marzena; Breuer, U.; Leonarska, A.

doi:10.1080/01411594.2016.1206541

Cited by 1 publication

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“…They found an increase of the pH for different nano-sized LN and LT powders above 10 at comparable values for β. The mechanism behind this phenomenon was found to be an ion exchange between H + and Li + whereby H x Li 1-x NbO 3 is formed [42,43]. For BT the dissolution of Ba 2+ and pH shifts from aqueous solutions of nano-sized powders were studied and described by Tripathy and Raichur [44].…”

Section: Dchf-da-based Dcf Assay (Gutmann Et Al)mentioning

confidence: 99%

Pyrocatalysis—The DCF assay as a pH-robust tool to determine the oxidation capability of thermally excited pyroelectric powders

2020

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Pyrocatalysis uses thermally excited pyroelectric materials for the generation of reactive oxygen species in water. This unique feature allows it to harvest energy in the form of natural temperature gradients or waste heat from industrial processes in order to degrade organic pollutants at low costs. Its further development into an advanced oxidation process for water remediation is dependent on the availability of pH-robust and nonspecific redox assays for the determination of its oxidation capability. Nevertheless, previous studies neglected the influence of pH changes and they were focused mainly on the degradation of one organic compound or specific chemical dosimetries. In this study, a pH-robust and nonspecific reaction protocol of the dichlorofluorescein assay was established for the investigation of the oxidation capability of the pyrocatalytic process. This reaction protocol was tested on three pyroelectric powders (LiNbO 3 , LiTaO 3 , BaTiO 3) in different amounts and it overcomes major constraints of a previously used dichlorodihydrofluorescein diacetate-based reaction protocol. Instead of its diacetate, dichlorodihydrofluorescein was used as fluorogenic probe and its concentration was drastically reduced to 1 μM. For the first time, these changes enable the determination and comparison of the oxidation capability independently of pH-rising processes, which are present for all investigated pyroelectric powders up to a pH of 11. Additionally, the precision of the dichlorofluorescein assay was drastically increased and the determination and consideration of autoxidation processes was enabled. Of all three pyroelectric powders, BaTiO 3 exhibited the highest oxidation capability with a linear increase with respect to the powder amount.

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Section: Dchf-da-based Dcf Assay (Gutmann Et Al)mentioning

confidence: 99%

Pyrocatalysis—The DCF assay as a pH-robust tool to determine the oxidation capability of thermally excited pyroelectric powders

2020

View full text Add to dashboard Cite

show abstract

Structural and electrical features induced by the leaching procedures on the LiNbO₃crystalline powder samples

Cited by 1 publication

References 16 publications

Pyrocatalysis—The DCF assay as a pH-robust tool to determine the oxidation capability of thermally excited pyroelectric powders

Pyrocatalysis—The DCF assay as a pH-robust tool to determine the oxidation capability of thermally excited pyroelectric powders

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Structural and electrical features induced by the leaching procedures on the LiNbO3crystalline powder samples

Cited by 1 publication

References 16 publications

Pyrocatalysis—The DCF assay as a pH-robust tool to determine the oxidation capability of thermally excited pyroelectric powders

Pyrocatalysis—The DCF assay as a pH-robust tool to determine the oxidation capability of thermally excited pyroelectric powders

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Structural and electrical features induced by the leaching procedures on the LiNbO₃crystalline powder samples