Effect of Heat Treatment on the Micro-Structural, Crystallinity and Photocatalytic Properties of Hydrothermally Prepared Titanate Nanowires

Abstract:

Titanate nanowires were synthesised by hydrothermal process in 10M NaOH aqueous solution at 200oC for 24h. The samples were washed repeatedly in HCl aq. solution and deionized water until pH ~7. Subsequently, the samples were heat-treated at 400-850°C in air for 2h. The X-ray diffraction (XRD) analysis of the sample heat-treated at 800°C showed the crystalline structure of sodium titanate (Na₂Ti₆O₁₃ ), while the presence of anatase phase was detected from the sample heat-treated at 850°C. Wire-like morphology of the synthesized sample was observed using FE-SEM. The photocatalytic activity of the samples heat-treated at 600,800, 850°C and 900°C was investigated by measuring the degradation of methylene blue (MB) in aqueous solution under UV-light irradiation and more than 90% of the dye was efficiently degraded by the sample heat-treated at 850°C within 45 minutes irradiation time as compared to other tested samples.

• Periodical: Advanced Materials Research (Volume 1133)
• Pages: 13-17
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1133.13
• Online since: January 2016
• Authors: Mohamad Siti Mariam, A.B. Siti Najihah, A.Z. Zuhana, M. Abd Kadir
• Keywords: Anatase Nanowire, Hydrothermal Process, Photocatalyst, Titanate Nanowire

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