Ali, Rusmidah (2006) Photodegradation of new methylene blue N in aqueous solution using zinc oxide titanium dioxide as catalyst. Jurnal Teknologi F (45F). pp. 31-42. ISSN 0127-9696
- Published Version
Official URL: http://www.penerbit.utm.my/onlinejournal/45/F/JT45...
In this study, ZnO and TiO2 are used as photocatalyst to degrade the dye, New Methylene Blue N. The photodegradation rate was measured using UV-Visible spectrophotometer. New Methylene Blue N showed the absorption values at Î»=590 nm and Î»=286 nm. UV lamp (Î»=354 nm) is used in the photodegradation process. Results showed that ZnO is a better catalyst compared to TiO2. The degradation by ZnO showed TiO2 gave 81 % at Î»=590 nm and 77.75 % at Î»=286 nm. In contratst, the degradation for TiO2 was 25.68 % at Î»=590 nm and 26.37 % at Î»=286 nm. Percent degradation for New Methylene Blue N is 88.89 % and 68.94 % at Î»=590 nm and Î»=286 nm respectively when H2O2 was added. The mixture of ZnO and TiO2 in the ratio of 85: 15 (0.085 g: 0.015 g) is the most optimum mixture of photocatalyst with the degradation percentage of 96.97 % and 93.61 % at Î»=590 nm and Î»=286 nm. The addition of Cu2+ metal ion gave the highest percentage of degradation (83.83 % at Î»=590 nm) compared to other metal ions. The addition of Pb2+ gave the highest percentage of degradation at Î»= 286 nm with 81.25 %. The optimum condition was achieved at pH 5.90, which gave the highest percentage of degradation, 92.84 % and 89.30 % at Î»=590 nm and Î»=286 nm respectively.
|Uncontrolled Keywords:||New methylene blue N, photodegradation|
|Subjects:||Q Science > QD Chemistry|
|Divisions:||Chemical and Natural Resources Engineering (Formerly known)|
|Deposited By:||Assoc. Prof. Dr. Rusmidah Ali|
|Deposited On:||20 Jun 2007 01:00|
|Last Modified:||09 Nov 2010 09:54|
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