The Fabrication of Modified Titanium Dioxide/Iron/ Diatomite Heterojunction Nanocomposite for Enhanced UV Process -Driven Photodegradation of Industrial Textile

Diatomite (kieselguhr)/Fe₂O₃ /TiO₂ composite as catalyst for heterogeneous photocatalysis of vat green 03 indanthren and characterized in this study.The diatomite/Fe₂O₃ /TiO₂ Called “Diatomite FC ”was made through surface modification treatments including Fe(NO₃)₃.9H₂O and NaOH then TiO₂ degussa P25 deposition on raw diatomite.In the Fe(NO₃)₃.9H₂O and NaOH treatments, surface SiO₂ of diatomite and TiO₂ degussa P25 were partially dissolved in the Fe(NO3)3.9H2O and NaOH by means of x-ray fluorescence ( XRF ), x-ray diffraction ( XRD ), scanning lectron microscopy ( SEM ),thermogravimetric analysis ( TGA ) and differential scanning calorimetry (DSC ) and UV-visible diffuse reflectance spectroscopy ( DRS ) .The surface area of diatomite / Fe₂O₃/TiO₂ is 970 m²/g .Diatomite/Fe₂O₃/TiO₂ “ Diatomite FC ” was Eg= 1.1 eV by UV-visible DRS technique. The vat green 03 indanthren textile dye degradation has pH dependency, the better result is at pH =10 with colour remove about 92 %.The photodecolourisation rate follows pseudo-first order kinetic with to respect to the dye concentration.