Synthesis, Characterization And Activity Of Titanium Dioxide Based- (Ca, Ce, W)-Tio2 Photocatalysts For Degradation Of Dye And Pesticide

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dc.contributor.authorUduak George, Akpan,
dc.date.accessioned2019-10-07T07:06:38Z
dc.date.available2019-10-07T07:06:38Z
dc.date.issued2011-08
dc.description.abstractGlobal industrialization is not without its attendant challenges. The release of unwanted by-products and pollutants which are carcinogenic and toxic into the environment by textiles, chemicals and processing industries is directly proportional to industrial growth. The environment must be kept safe. Therefore, photocatalysis leading to complete mineralization of pollutant(s) was adopted to treat wastewaters containing dyes (acid red 1, reactive orange 16, reactive blue 19, direct blue 71 and acid blue 25) and a pesticide (2,4-dichlorophenoxyacetic acid; 2,4-D). A composite photocatalyst, electronically stable of the type Ti(1-x-y)Ca(3x-y)Ce(2x-y)W(y/6)O2(1-2(y-x)) (at y<2x and x+y<1) with an enhanced photocatalytic activity was developed by doping TiO2 with Ca, Ce and W. The photocatalyst was prepared by sol-gel method, hydrothermally treated and employed in the degradation of the above mentioned pollutants. The effectiveness of the composite photocatalyst was verified by comparing its activity under the same experimental conditions with two commercial photocatalysts; Degussa P25 and TiO2-Sigma product CAS No. 1317-70-0. The developed photocatalyst was better than TiO2-Sigma product in solar photocatalytic degradation of AR1. The reusability test of the developed photocatalyst makes it superior to Degussa P25 (which could not settle out of solution seven months after photocatalytic degradation of 2,4-D), hence rendering it non-reusable. On the other hand, the composite photocatalyst settled out of solution in less than 1 h after irradiation and proved to be as efficient at the fourth cycle as in the first, as it accomplished a complete degradation at the same irradiation time.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/8957
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectTitanium Dioxideen_US
dc.subject(Ca, Ce, W)-Tio2 Photocatalystsen_US
dc.titleSynthesis, Characterization And Activity Of Titanium Dioxide Based- (Ca, Ce, W)-Tio2 Photocatalysts For Degradation Of Dye And Pesticideen_US
dc.typeThesisen_US
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