Synthesis and characterization of MOF-5/TiO2 thin film

Yeoh, Melissa Xiu Jing (2014) Synthesis and characterization of MOF-5/TiO2 thin film. Universiti Malaysia Sabah. (Unpublished)

[img]
Preview
Text
ae0000003053.pdf

Download (820kB) | Preview

Abstract

The major drawbacks of photocatalytic degradation of organic pollutants by TiOâ‚‚ are the wide band gap energy of TiOâ‚‚ and the rapid recombination between the charge carriers (e-/h+ pairs). These limit the photocatalytic activity of TiOâ‚‚ as large amount of solar is still unable to excite the photocatalyst. The MOF-5 / TiOâ‚‚ thin film was fabricated by dip-coating a TiOrcoated pyrex tube into a MOF-5 mother solution. XRD analysis of the MOF-5 / TiOâ‚‚ thin film confirmed the crystalline structures of anatase Ti02 and MOF-5 respectively. This study utilised MOF-5 / TiOâ‚‚/UV-A system in the photocatalytic degradation of methyl orange. The MOF-5 / TiOâ‚‚/UV-A system was capable of degrading 34.3 % of 5 ppm of aqueous methyl orange solution after 2 hours compared to 32.2 % by the TiOâ‚‚/UV-A system under the same reaction conditions. This shows that the presence of MOF-5 is able to increase the photocatalytic activity of TiOâ‚‚. However, the photodegradation efficiency starts to decrease after irradiation time of 3 hours. This could be due to the competition between methyl orange and its intermediate species during the photodegradation process.

Item Type: Academic Exercise
Uncontrolled Keywords: photocatalytic, crystalline structures, photodegradation process, organic pollutants
Subjects: Q Science > QD Chemistry
Divisions: FACULTY > Faculty of Science and Natural Resources
Depositing User: Unnamed user with email storage.bpmlib@ums.edu.my
Date Deposited: 06 Jun 2017 03:21
Last Modified: 13 Nov 2017 02:40
URI: http://eprints.ums.edu.my/id/eprint/14634

Actions (login required)

View Item View Item

Browse Repository
Collection
   Articles
   Book
   Speeches
   Thesis
   UMS News
Search
Quick Search

   Latest Repository

Link to other Malaysia University Institutional Repository

Malaysia University Institutional Repository