Decomposition of banten ilmenite by caustic fusion process for TiO2 photocatalytic applications

Mineral Processing and Technology International Conference 2017

Aristanti, Y.^1 ; Supriyatna, Y.I.^2 ; Masduki, N.P.^1 ; Soepriyanto, S.^3

Department of Metallurgical and Material Engineering, Bandung Institute of Technology and Science, Bekasi

17530, Indonesia^1

Research Unit for Mineral Technology, Indonesian Institute of Sciences, Lampung

35361, Indonesia^2

Department of Metallurgical Engineering, Bandung Institute of Technology, Bandung

40132, Indonesia^3

关键词: Anatase phase;    Band gap energy;    Degradation efficiency;    Fusion process;    Photocatalytic activities;    Photocatalytic application;    Sodium titanates;    TiO2 surfaces;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/285/1/012005/pdf
DOI  :  10.1088/1757-899X/285/1/012005

来源: IOP

【 摘 要 】

Decomposition of Banten ilmenite by caustic fusion process for TiO2photocatalytic applications has been done. Caustic fusion process using NaOH to obtain sodium titanate compound which is soluble in sulfuric acid (H2SO4) to produces TiOSO4as a precursor. Synthesis of TiO2from TiOSO4precursors by variations of pH hydrolysis are 1.0 (TiO2A), 1.5 (TiO2B) and 2.0 (TiO2C). XRD pattern identified TiO2structures crystals are anatase phase and traces α-Fe2O3as an impurity. Presence of Fe2O3as an impurities give positive effect on TiO2photocatalytic activity that is to narrower the band gap energy thus facilitates of electrons excitation from valence band to conduction band and enlarge the specific surface area thus reaction between Rhodamin B solution and TiO2surface can be faster. TiO2A, TiO2B and TiO2C was compared to TiO2M (commercial TiO2) in Rhodamin B solution for the photocatalytic activity where the maximum TiO2degradation efficiency was obtained at TiO2C 80.0 % while TiO2M 59.8 %.