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Photodegradation of methylene blue in aqueous media using TIO2 -based heterogeneous photocatalysts under natural light

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dc.contributor.advisorVicente, Juvinch R.
dc.contributor.authorBernido, Julidyn P.
dc.contributor.chairJanagap, Steve P.
dc.contributor.committeememberCainglet, Rica P.
dc.contributor.committeememberFrio, Ma. Angeles S.
dc.date.accessioned2026-06-24T00:39:24Z
dc.date.issued2015-06
dc.description.abstractThis study developed two heterogeneous TiO2-based photocatalysts: pure TiO2 and Fe-doped TiO2 (Fe-TiO2). Heterogeneous catalysts were prepared by coating TiO2 and Fe-TiO2 powder on glass beads. The photocatalytic activity of both heterogeneous photocatalysts were studied by photodegradation of methylene blue in aqueous solution under two pH conditions (6 and 9) and two ionic concentration conditions (0 and 38 ppt). The Fe-TiO2 powder contained minimal amount (2.245%) of Fe as expected. However, surface functionality and ultraviolet-visible (UV-Vis) profile of both TiO2 and Fe-TiO2 powder were very similar indicating that doping did not alter these properties. Between the two heterogeneous catalysts prepared, the amount of Fe-TiO2 catalyst coated on glass beads was lower compared to pure TiO2. The removal of methylene blue was significantly affected by ionic concentration which removal is higher at lower ionic concentration (0 ppt). Although it appeared that the removal of methylene blue was higher at pH 9, statistical analyses revealed that the effect was not significant. In addition, the removal of methylene blue by the two catalysts were significantly different. Heterogeneous photocatalyst based on pure TiO2 showed higher removal of methylene blue in all pH and ionic concentration. Moreover, no interactive effects between variables were observed. Lastly, the blank showed no significant difference on the removal of methylene blue with the heterogeneous photocatalysts which suggest that degradation by direct photolysis from sunlight could be the reason for this result.
dc.format.extentix, 51 p.
dc.identifier.citationBernido, J. P. (2015). <i>Photodegradation of methylene blue in aqueous media using TIO2 -based heterogeneous photocatalysts under natural light</i> [Undergraduate thesis, University of the Philippines Visayas]. UPV Institutional Repository. https://hdl.handle.net/20.500.14583/681
dc.identifier.urihttps://hdl.handle.net/20.500.14583/681
dc.publisherDepartment of Chemistry, College of Arts and Sciences, University of the Philippines Visayas
dc.subjectPhotodegradation
dc.subjectPhotocatalysis
dc.subjectTitanium dioxide
dc.subjectWater pollution control
dc.subjectWater quality
dc.subject.agrovocmethyl
dc.subject.agrovocnanotechnology
dc.subject.agrovocwater treatment
dc.subject.agrovoctitanium compounds
dc.subject.agrovocsolar energy
dc.subject.lccLG 993.5 2015 C5 B47
dc.subject.sdgSDG 6 - Clean water and sanitation
dc.subject.sdgSDG 9 - Industry, innovation and infrastructure
dc.subject.sdgSDG 12 - Responsible consumption and production
dc.subject.sdgSDG 14 - Life below water
dc.subject.sdgSDG 13 - Climate action
dc.titlePhotodegradation of methylene blue in aqueous media using TIO2 -based heterogeneous photocatalysts under natural light
dc.typeThesis
thesis.degree.departmentCollege of Arts and Sciences
thesis.degree.grantorUniversity of the Philippines Visayas
thesis.degree.levelUndergraduate
thesis.degree.nameBachelor of Science in Chemistry

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