Preparation, characterization and photocatalytic degradation of methylene blue by Fe3+ doped TiO2 supported on natural zeolite using response surface methodology

Advances in Environmental Technology

Hadieh Taghvaei¹  nila davari¹  samira maazi¹  Mehrdad Farhadian¹ 

[1] Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran;

关键词: methylene blue;    photocatalyst;    tio2/fe2o3;    natural zeolite;    response surface methodology;   

DOI  :  10.22104/aet.2018.2462.1124

来源: DOAJ

【 摘 要 】

The photocatalytic degradation of methylene blue was investigated with TiO2 and Fe2O3 nanoparticles supported on natural zeolite. The synthesized photocatalyst was characterized by XRD, XRF, FT-IR, EDX, FE-SEM, and BET analyses. The results of XRD, FT-IR, and EDX confirmed the successful loading of Fe3+ doped TiO2 nanoparticles on natural zeolite. Further, the FE-SEM results confirmed the deposition of TiO2/Fe2O3 on the zeolite, with the approximate particle size being 52.3 nm. According to the XRF results, the synthesized nanoparticles had Fe3+/TiO2 molar ratios of 0.06 in the synthesized photocatalyst. Based on BET analysis, the surface area of TiO2/Fe3+/natural zeolite was about 112.69 m2/g.  The effects of operational factors such as pH (6-10), dye concentration (25-75 mg/L) and H2O2 concentration (10-40 mg/L) were considered and optimized via response surface methodology utilizing Box-Behnken design. The optimization results indicated that the maximum percentage of degradation was achieved at a dye concentration of 25 mg/L, initial pH of 10, and H2O2 concentration of 40 mg/L with a 90 min irradiation time and a 1 g/l photocatalyst concentration. The dye degradation efficiency reached 92% under this optimum condition.

【 授权许可】

Unknown