Synergetic photocatalytic and adsorptive removals of metanil yellow using TiO2/grass-derived cellulose/chitosan (TiO2/GC/CH) film composite

Document Type : Original Article

Authors

1 Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Kopelma Darussalam, Indonesia

2 Department of Chemistry Education, Faculty of Education and Teacher Training, Universitas Syiah Kuala, Kopelma Darussalam, Indonesia

3 Graduate School of Mathematics and Applied Sciences, Universitas Syiah Kuala, Kopelma Darussalam, Indonesia

Abstract

Chitosan (CH) and cellulose are the most abundant biopolymer which can be utilized for hazardous dye removal. By incorporating TiO2 onto cellulose/CH matrix, our research aims to achieved higher metanil yellow removal by means of synergetic adsorption/photodegradation mechanisms. The cellulose particles were extracted from wild grass (Imperata cylindrica L.) to obtain grass-derived cellulose (GC). Simple blending method was used to prepare TiO2/GC/CH, in which the composition was determined by simple additive weighting method (SAW). TiO2/GC/CH was characterized by means of tensile strength test (also used for SAW), Fourier Transform-Infrared (FT-IR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). Metanil yellow removal using TiO2/GC/CH work the best at acidic pH range. The removal follows the pseudo-second-order kinetic (R2 = 0.99699) and Langmuir isotherm (R2 = 0.99786) modellings. Higher qm obtained from the metanil yellow removal under UV irradiation (qm = 171.5266) proves the synergism between adsorption and photodegradation.

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