15th Regional Symposium on Chemical Engineering, Proceedings
巻, 号, ページ
Volume 2
pp. 655-659
出版年月
2008年12月
出版者
和文:
英文:
会議名称
和文:
英文:
15th Regional Symposium on Chemical Engineering
開催地
和文:
英文:
Kuala Lumpur, Malaysia
アブストラクト
Iron (Fe) and Niobium (Nb) were used as co-dopant metals to synthesize titanium dioxide (TiO2) photocatalysts using a temperature-controlled sol-gel method. The photocatalysts powder were characterized for their physico-chemical properties such as crystallinity (XRD), specific surface area (BET), surface composition (SEM/EDX), and transformation during the calcination process (TG/DTA). These properties were correlated against photocatalytic activity of the photocatalysts towards aqueous methyl orange (MO) solution under UV-vis and visible light irradiation. The 0.25%mol Fe:Nb loading egerged to be the most favorable co-doping amount to achieve the highest photocatalytic activity as indicated by the highest conversion of MO. Enhanced photocatalytic activity compared to undoped TiO2 was attributed to the cooperative effects of metal dopants; Fe with its band gap narrowing effect and Nb serving as electron trap, prompting the formation of ・OH radicals and leading to improved photocatalytic activity.
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