Effects of annealing parameters on phase, structure and thermochromic properties of VO2 (M) derived from nanostructured VO2(B)
Synthesis of thermochromic VO2 (M) was successfully done by annealing hydrothermally-prepared VO2 (B) at different temperatures and times. Conversion of the metastable VO2 (B) to the thermochromic VO2 polymorph was studied using thermogravimetric analyzer (TGA) under N2 atmosphere. Moreover, the pha...
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doaj-9b3a9c6c7d614698bf650b6245e6f32d2021-09-06T19:22:36ZengSciendoMaterials Science-Poland2083-134X2020-12-0138466166610.2478/msp-2020-0071Effects of annealing parameters on phase, structure and thermochromic properties of VO2 (M) derived from nanostructured VO2(B)Barra Hamdi Muhyuddin0Chen Soo Kien1Tamchek Nizam2Talib Zainal Abidin3Lee Oon Jew4Tan Kar Ban5Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, MalaysiaDepartment of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, MalaysiaDepartment of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, MalaysiaDepartment of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, MalaysiaSchool of Fundamental Science, Universiti Malaysia Terengganu, 21300 Kuala Terengganu, Terengganu, MalaysiaDepartment of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, MalaysiaSynthesis of thermochromic VO2 (M) was successfully done by annealing hydrothermally-prepared VO2 (B) at different temperatures and times. Conversion of the metastable VO2 (B) to the thermochromic VO2 polymorph was studied using thermogravimetric analyzer (TGA) under N2 atmosphere. Moreover, the phase and morphology of the synthesized samples were studied using X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM), respectively. Accordingly, the XRD scans of all the annealed samples exhibited the presence of monoclinic VO2 (M), while the FE-SEM images of the samples showed the formation of nanorods and nanospheres, particularly those heated at high temperatures (650 °C and 700 °C). Meanwhile, differential scanning calorimetry (DSC) was used to measure the phase transition temperature (τc), hysteresis, and enthalpy of the prepared VO2. Based on these results, all samples displayed a τc of about 66 °C. However, the hysteresis was high for the samples annealed at lower temperatures (550 °C and 600 °C), while the enthalpy was very low for samples heated at lower annealing time (1.5 h and 1 h). These findings showed that crystallinity and nanostructure formation affected the thermochromic properties of the samples. In particular, the sample annealed at 650 °C showed better crystallinity and improved thermochromic behavior.https://doi.org/10.2478/msp-2020-0071annealinghydrothermal synthesisthermochromicvanadium dioxide |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Barra Hamdi Muhyuddin Chen Soo Kien Tamchek Nizam Talib Zainal Abidin Lee Oon Jew Tan Kar Ban |
spellingShingle |
Barra Hamdi Muhyuddin Chen Soo Kien Tamchek Nizam Talib Zainal Abidin Lee Oon Jew Tan Kar Ban Effects of annealing parameters on phase, structure and thermochromic properties of VO2 (M) derived from nanostructured VO2(B) Materials Science-Poland annealing hydrothermal synthesis thermochromic vanadium dioxide |
author_facet |
Barra Hamdi Muhyuddin Chen Soo Kien Tamchek Nizam Talib Zainal Abidin Lee Oon Jew Tan Kar Ban |
author_sort |
Barra Hamdi Muhyuddin |
title |
Effects of annealing parameters on phase, structure and thermochromic properties of VO2 (M) derived from nanostructured VO2(B) |
title_short |
Effects of annealing parameters on phase, structure and thermochromic properties of VO2 (M) derived from nanostructured VO2(B) |
title_full |
Effects of annealing parameters on phase, structure and thermochromic properties of VO2 (M) derived from nanostructured VO2(B) |
title_fullStr |
Effects of annealing parameters on phase, structure and thermochromic properties of VO2 (M) derived from nanostructured VO2(B) |
title_full_unstemmed |
Effects of annealing parameters on phase, structure and thermochromic properties of VO2 (M) derived from nanostructured VO2(B) |
title_sort |
effects of annealing parameters on phase, structure and thermochromic properties of vo2 (m) derived from nanostructured vo2(b) |
publisher |
Sciendo |
series |
Materials Science-Poland |
issn |
2083-134X |
publishDate |
2020-12-01 |
description |
Synthesis of thermochromic VO2 (M) was successfully done by annealing hydrothermally-prepared VO2 (B) at different temperatures and times. Conversion of the metastable VO2 (B) to the thermochromic VO2 polymorph was studied using thermogravimetric analyzer (TGA) under N2 atmosphere. Moreover, the phase and morphology of the synthesized samples were studied using X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM), respectively. Accordingly, the XRD scans of all the annealed samples exhibited the presence of monoclinic VO2 (M), while the FE-SEM images of the samples showed the formation of nanorods and nanospheres, particularly those heated at high temperatures (650 °C and 700 °C). Meanwhile, differential scanning calorimetry (DSC) was used to measure the phase transition temperature (τc), hysteresis, and enthalpy of the prepared VO2. Based on these results, all samples displayed a τc of about 66 °C. However, the hysteresis was high for the samples annealed at lower temperatures (550 °C and 600 °C), while the enthalpy was very low for samples heated at lower annealing time (1.5 h and 1 h). These findings showed that crystallinity and nanostructure formation affected the thermochromic properties of the samples. In particular, the sample annealed at 650 °C showed better crystallinity and improved thermochromic behavior. |
topic |
annealing hydrothermal synthesis thermochromic vanadium dioxide |
url |
https://doi.org/10.2478/msp-2020-0071 |
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