Photocatalytic degradation of indigo carmine dye using α-Fe2O3/bentonite nanocomposite prepared by mechanochemical synthesis

13th Joint Conference on Chemistry

Lubis, Surya^1 ; Sheilatina^1 ; Wardani Sitompul, Dina^1

Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Syiah Kuala, Darussalam, Banda Aceh

23111, Indonesia^1

关键词: High temperature;    Indigo Carmine;    Indigo carmine dyes;    Initial concentration;    Initial dye concentration;    Mechanochemical synthesis;    Mechanochemicals;    Photo catalytic degradation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/509/1/012142/pdf
DOI  :  10.1088/1757-899X/509/1/012142

来源: IOP

【 摘 要 】

Preparation of α-Fe2O3/bentonite nanocomposite has been successfully conducted by mechanochemical synthesis using iron sand from Syiah Kuala Beach, Banda Aceh and bentonite from Kuala Dewa, North Aceh as raw materials. The α-Fe2O3 was extracted using hydrochloric acid and precipitated using ammonium hydroxide as precipitation agent at pH 6 followed by calcination at high temperature in order to obtained α-Fe2O3. The α-Fe2O3/bentonite nanocomposite was prepared by milling the mixture of α-Fe2O3 and bentonite at 4:1 ratio in a planetary mill for 2 hours without any solvent. The XRD results showed that the main component of iron sand was magnetite (Fe3O4), while in α-Fe2O3/bentonite nanocomposite the main component was α-Fe2O3 and SiO2. The photocatalytic activity of α-Fe2O3/bentonite nanocomposite was investigated on degradation of indigo carmine (IC) dye at various conditions of pH, photocatalyst mass, initial dye concentration and irradiation time. The results showed that the highest photocatalytic activity of α-Fe2O3/bentonite nanocomposite was obtained at the initial pH value of IC solution 1, 250 mg photocatalyst mass and initial concentration of IC 10 mg/L after irradiated for 90 minutes under ultra violet and solar light, respectively. The photocatalytic activity of α-Fe2O3/bentonite nanocomposite using UV light was almost the same as that of by solar light.