In this work, nine products were prepared by modifying the experimental conditions (6, 12 and 18 h at 110, 135 and 160 °C) of hydrothermal treatment of starting nanoanatase in significantly less concentrated alkaline medium than usual in order to obtain a pure titanate phase. The nanocrystalline samples were characterized by XRPD, FESEM, HRTEM/SAED, EDS, TG, FT-IR, UV-Vis and BET analyses. The results revealed that the structure, texture, morphology and band gap energy of samples strongly depend on conditions of hydrothermal treatment. The intensification of hydrothermal treatment significantly increases the solubility of TiO2 promoting the changes in morphology from nearly spherical titania nanoparticles to elongated titanate nanosheets. The single titanate phase was obtained after energetically the most intensive treatment, i.e. 18 h at 160 °C. The step-by-step optimization was thus necessary to finally distinguish the titanates from titania in terms of structural and spectral proper...ties and to finally allow the clarification of long-standing confusion between titania and titanates. The obtained single titanate phase was furtherly used to fabricate a humidity sensor, which showed remarkably rapid response and quick recovery time.
TY - JOUR
AU - Simović, B.
AU - Dapčević, Aleksandra
AU - Zdravković, J.
AU - Tasić, N.
AU - Kovač, S.
AU - Krstić, Jugoslav
AU - Branković, Goran
PY - 2019
UR - http://cer.ihtm.bg.ac.rs/handle/123456789/2495
AB - In this work, nine products were prepared by modifying the experimental conditions (6, 12 and 18 h at 110, 135 and 160 °C) of hydrothermal treatment of starting nanoanatase in significantly less concentrated alkaline medium than usual in order to obtain a pure titanate phase. The nanocrystalline samples were characterized by XRPD, FESEM, HRTEM/SAED, EDS, TG, FT-IR, UV-Vis and BET analyses. The results revealed that the structure, texture, morphology and band gap energy of samples strongly depend on conditions of hydrothermal treatment. The intensification of hydrothermal treatment significantly increases the solubility of TiO2 promoting the changes in morphology from nearly spherical titania nanoparticles to elongated titanate nanosheets. The single titanate phase was obtained after energetically the most intensive treatment, i.e. 18 h at 160 °C. The step-by-step optimization was thus necessary to finally distinguish the titanates from titania in terms of structural and spectral properties and to finally allow the clarification of long-standing confusion between titania and titanates. The obtained single titanate phase was furtherly used to fabricate a humidity sensor, which showed remarkably rapid response and quick recovery time.
PB - Elsevier Ltd
T2 - Journal of Alloys and Compounds
T1 - From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions
SP - 810
EP - 819
DO - 10.1016/j.jallcom.2018.12.039
ER -
@article{
author = "Simović, B. and Dapčević, Aleksandra and Zdravković, J. and Tasić, N. and Kovač, S. and Krstić, Jugoslav and Branković, Goran",
year = "2019",
url = "http://cer.ihtm.bg.ac.rs/handle/123456789/2495",
abstract = "In this work, nine products were prepared by modifying the experimental conditions (6, 12 and 18 h at 110, 135 and 160 °C) of hydrothermal treatment of starting nanoanatase in significantly less concentrated alkaline medium than usual in order to obtain a pure titanate phase. The nanocrystalline samples were characterized by XRPD, FESEM, HRTEM/SAED, EDS, TG, FT-IR, UV-Vis and BET analyses. The results revealed that the structure, texture, morphology and band gap energy of samples strongly depend on conditions of hydrothermal treatment. The intensification of hydrothermal treatment significantly increases the solubility of TiO2 promoting the changes in morphology from nearly spherical titania nanoparticles to elongated titanate nanosheets. The single titanate phase was obtained after energetically the most intensive treatment, i.e. 18 h at 160 °C. The step-by-step optimization was thus necessary to finally distinguish the titanates from titania in terms of structural and spectral properties and to finally allow the clarification of long-standing confusion between titania and titanates. The obtained single titanate phase was furtherly used to fabricate a humidity sensor, which showed remarkably rapid response and quick recovery time.",
publisher = "Elsevier Ltd",
journal = "Journal of Alloys and Compounds",
title = "From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions",
pages = "810-819",
doi = "10.1016/j.jallcom.2018.12.039"
}
Simović B, Dapčević A, Zdravković J, Tasić N, Kovač S, Krstić J, Branković G. From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions. Journal of Alloys and Compounds. 2019;:810-819
Simović, B., Dapčević, A., Zdravković, J., Tasić, N., Kovač, S., Krstić, J.,& Branković, G. (2019). From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions.
Journal of Alloys and CompoundsElsevier Ltd., 810-819.
https://doi.org/10.1016/j.jallcom.2018.12.039
Simović B., Dapčević Aleksandra, Zdravković J., Tasić N., Kovač S., Krstić Jugoslav, Branković Goran, "From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions" (2019):810-819,
https://doi.org/10.1016/j.jallcom.2018.12.039 .
