Abstract

Afini Razani¹, Abdul Halim Abdullah^1,2, Anwar Fitrianto³, Nor Azah Yusof^1,2 and Umar Ibrahim Gaya⁴

DOI : http://dx.doi.org/10.13005/ojc/330442

Fe₂O₃^_doped and undoped TiO₂ catalysts were synthesized by sol-gel method and used to optimize the photocatalytic degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D). The catalysts produced were dominated by the tetragonal, crystalline anatase TiO₂ cell structure. The 0.05wt% Fe₂O₃^_doped TiO₂ catalyst exhibited higher photocatalytic activity than that of undoped TiO₂ but its performance decline with increase Fe₂O₃ content due to possible increase of recombination centers. Photocatalytic degradation of 2,4-D was optimized by response surface methodology. The highest 2,4-D degradation (48%) was obtained when 1.0 g of 0.05wt% Fe₂O₃^_doped TiO₂ is used to degrade 10 ppm of 2,4-D at pH 4.

Fe2O3-TiO2; Sol-gel; Photocatalysis; Response Surface; 2,4-Dichlorophenoxyacetic Acid

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