Oxidation of titanium for TiO2 nanowires formation
| dc.contributor.author | Janet Kiew Li Siang | |
| dc.date.accessioned | 2021-02-15T03:49:08Z | |
| dc.date.available | 2021-02-15T03:49:08Z | |
| dc.date.issued | 2019-07 | |
| dc.description.abstract | Hexavalent chromium, Cr(VI) is a carcinogenic heavy metal with high level of toxicity that possess a great threat to our environment. The introduction of Cr(VI) into the environment were mostly caused by anthropogenic activities especially electroplating and leather tanning industries. The purpose of this work is to investigate the ability of nanostructured TiO2 in removal of Cr(VI) from aqueous solution. The TiO2 nanowires was synthesized by thermal oxidation of Ti foil under various oxidation parameter. The characterizations techniques used to examine the synthesized TiO2 nanowires include FESEM, HRTEM and XRD. There are three main oxidation parameter used in this work: (i) oxidation temperature, (ii) oxidation time and (iii) oxidation environment. The optimum oxidation parameter for the growth of TiO2 nanowires via thermal oxidation was found to be at 700 ℃ for 120 minutes under KOH vapour environment. The TiO2 nanowires grown were long, thin and more defined. They also have full coverage on the Ti foil. The effectiveness of the synthesized TiO2 nanowires were tested upon removal of Cr(VI) from water body via photocatalysis reaction under sunlight. The concentration of Cr(VI) was determined using UV-Vis spectrophotometer. TiO2 nanowires that was oxidized in KOH vapour environment showed the highest reduction of Cr(VI) at 84.92%. The lowest reduction of Cr(VI) were shown by TiO2 nanowires grown in dry air environment which is at 36.38%. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/11276 | |
| dc.language.iso | en | en_US |
| dc.title | Oxidation of titanium for TiO2 nanowires formation | en_US |
| dc.type | Other | en_US |
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