Niobium Oxide Doped Titanium Dioxide Photocatalyst for Phenol Photodegradation
DOI:
https://doi.org/10.11113/jomalisc.v2.55Keywords:
Niobium oxide, TiO2, photocatalyst, phenol photodegradationAbstract
Phenolic compounds are highly toxic and contribute to water pollution, posing health risks with long-term exposure. To address this issue, heterogeneous photocatalysis, titanium dioxide (TiO2) was chosen as a commonly used catalyst. However, TiO2 is ineffective under visible light due to its wide band gap energy and thus leads to rapid recombination of electron-hole pairs. To enhance its performance, TiO2 was doped with niobium oxide (Nb2O5), which had increased its photocatalytic activity under visible light. This study investigated the synthesis of Nb2O5-doped TiO2 via sol-gel method. The X-ray diffractometry results revealed that all samples had crystallized in the anatase phase. DRUV-Vis spectroscopy confirmed the successful loading of Nb2O5 into TiO2, resulting in a reduced band gap energy and enhanced photocatalytic performance. Amongst all the samples, 5wt% Nb2O5 doped TiO2 recorded the highest phenol degradation activity (32%) under visible light irradiation.
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