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Vol. 29 No. 10 (2017): Vol 29 Issue 10

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Thermal Stability on Morphology and Crystal Structures of Hydrothermally Synthesized Titanate Nanotubes and Their Photocatalytic Activity

https://doi.org/10.14233/ajchem.2017.20684
Mohd Hasmizam Razali
Advanced Nanomaterials Research Group, School of Fundamental Sciences, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia; School of Fundamental Sciences, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia
Uwaisulqarni M. Osman
School of Fundamental Sciences, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia
Mohd Zul Helmi Mohd Rozaini
Institute of Biotechnology Marine, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia
Mahani Yusoff
Faculty of Bioengineering and Technology, Universiti Malaysia Kelantan Kampus Jeli, Karung Berkunci No.100, 17600 Jeli, Kelantan, Malaysia

Corresponding Author(s) : Mohd Hasmizam Razali

mdhasmizam@umt.edu.my

Asian Journal of Chemistry, Vol. 29 No. 10 (2017): Vol 29 Issue 10

Abstract

Thermal stability on morphology and crystal structure of hydrothermally synthesized titanates nanotubes was investigated. Morphology study by FESEM and TEM revealed that the synthesized titanate nanotubes retained up to 500 °C before converted into nanowires and nanorods at 600 and 700 °C, respectively. The crystal structure of sodium trititanate nanotubes remained unchanged upon thermal treatment from 300 to 500 °C. However at 600 and 700 °C, the interlayer titanate in sodium trititanate samples undergo dimerization like process leading to the formation of an intermediate nanostructured hexatitanate, just before transformed into the corresponding anatase TiO2 crystals. Titanate nanotubes either trititanate or hexatitanate show low photocatalytic activity for methyl orange degradation due to their inter-layered crystal structure.

Keywords

Thermal Titanate Nanotubes Hydrothermal Photocatalyst
Razali, M. H., Osman, U. M., Mohd Rozaini, M. Z. H., & Yusoff, M. (2017). Thermal Stability on Morphology and Crystal Structures of Hydrothermally Synthesized Titanate Nanotubes and Their Photocatalytic Activity. Asian Journal of Chemistry, 29(10), 2207–2210. https://doi.org/10.14233/ajchem.2017.20684
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