In this work, nine products were prepared by modifying the experimental conditions (6, 12 and 18 hat 110, 135 and 160 degrees 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 hat 160 degrees C. The step-by-step optimization was thus necessary to finally distinguish the titanates from titania in terms of structural and spe...ctral 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.
TY - JOUR
AU - Simović, Bojana
AU - Dapčević, Aleksandra
AU - Zdravković, Jelena
AU - Tasić, Nikola
AU - Kovac, Sabina
AU - Krstic, Jugoslav
AU - Branković, Goran
PY - 2019
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1283
AB - In this work, nine products were prepared by modifying the experimental conditions (6, 12 and 18 hat 110, 135 and 160 degrees 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 hat 160 degrees 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 Science Sa, Lausanne
T2 - Journal of Alloys and Compounds
T1 - From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions
EP - 819
SP - 810
VL - 781
DO - 10.1016/j.jallcom.2018.12.039
ER -
@article{
author = "Simović, Bojana and Dapčević, Aleksandra and Zdravković, Jelena and Tasić, Nikola and Kovac, Sabina and Krstic, Jugoslav and Branković, Goran",
year = "2019",
abstract = "In this work, nine products were prepared by modifying the experimental conditions (6, 12 and 18 hat 110, 135 and 160 degrees 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 hat 160 degrees 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 Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions",
pages = "819-810",
volume = "781",
doi = "10.1016/j.jallcom.2018.12.039"
}
Simović, B., Dapčević, A., Zdravković, J., Tasić, N., Kovac, S., Krstic, J.,& Branković, G.. (2019). From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 781, 810-819.
https://doi.org/10.1016/j.jallcom.2018.12.039
Simović B, Dapčević A, Zdravković J, Tasić N, Kovac S, Krstic J, Branković G. From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions. in Journal of Alloys and Compounds. 2019;781:810-819.
doi:10.1016/j.jallcom.2018.12.039 .
Simović, Bojana, Dapčević, Aleksandra, Zdravković, Jelena, Tasić, Nikola, Kovac, Sabina, Krstic, Jugoslav, Branković, Goran, "From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions" in Journal of Alloys and Compounds, 781 (2019):810-819,
https://doi.org/10.1016/j.jallcom.2018.12.039 . .
