Livy Laysandra, Meri Winda Masnona Kartika Sari, Felycia Edi Soetaredjo, Kuncoro Foe, Jindrayani Nyoo Putro, Alfin Kurniawan, Yi-Hsu Ju, Suryadi Ismadji
Bentonite − TiO2 composites were prepared by impregnation of TiO2 and bentonite, followed by microwave irradiation processes. The composites were characterized using FTIR, SEM, XRD, and nitrogen sorption methods. Anatase phase of TiO2 in all composites are observed through XRD diffraction peaks and surface morphology of the composites. The adsorption and photocatalytic capabilities of the composites were tested in liquid phase adsorption of methylene blue and Rhodamine B. The adsorption and photocatalytic degradation experiments were conducted in the presence or absence of UV light irradiation. Langmuir and Freundlich models were employed to correlate the experimental adsorption data, and it was found that Langmuir gave better performance in correlating the experimental data. Modification of Langmuir equation to accommodate photocatalytic degradation process was conducted, and the model could represent the experimental results very well. © 2017 The Authors
Department of Chemical Engineering, Widya Mandala Surabaya Catholic University, Kalijudan 37, Surabaya, 60114, Indonesia; Faculty of Pharmacy, Widya Mandala Surabaya Catholic University, Pakuwon City, Kalisari 1, Surabaya, 60112, Indonesia; Department of Chemical Engineering, National Taiwan University of Science and Technology, No. 43, Sec 4, Rd, Da'an District, Taipei City 106, Keelung, Taiwan