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

Abstract

Chitosan (CH) and cellulose are the most abundant biopolymers which could be utilized for hazardous dye removal. By incorporating TiO2 onto cellulose/CH matrix, our research aimed to achieve high metanil yellow removal by means of synergetic adsorption/photodegradation mechanism. 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 works very well at acidic pH range. The removal follows the pseudo-second-order kinetic (R 2 = 0.997) and Langmuir isotherm (R 2 = 0.998) modellings. High qm obtained from the metanil yellow removal under UV irradiation (qm = 171.527) proves the synergism between adsorption and photodegradation. The developed TiO2/GC/CH could be potentially used in the wastewater treatment for azo dye removal.

Development of Chitosan/Rice Husk-Based Silica Composite Membranes for Biodiesel Purification

“…The adsorption capacity of the IOCM after being regenerated twice could only reduce the acid number by 17% (of the original removal), the soap level by 34%, and free glycerol by 22%. The decrease of the regenerated IOCM in removing biodiesel impurities could be ascribed to the leaching of silica particles due to chitosan swelling [45,46]. As revealed by our investigation on silica particle loading, the impurity adsorptions are dependent on the number of silica particles embedded in the chitosan matrix.…”

Discrimination of Plastic Waste using Laser-induced Breakdown Spectroscopy-principal Component Analysis: Highlighting Molecular LIBS

“…Previously, LIBS was reported capable of identifying those aforementioned toxic elements in PP mixture [18]. Our suspicion regarding the toxic elements is based on the fact that heavy metals could form a surface chemical interaction with the binding sites available on the plastic [34,35]. Therefore, even though the manufacturer does not add toxic metals to the plastic, it still capable of adsorbing the heavy metal from the environment.…”

Understanding the Effect of Interfacial Interphase on the Elastic Response of Hollow Glass Microsphere Reinforced Microcomposites

“…Based on previous studies, numerous thermosettingbased composite systems have been designed and developed using micro size fillers from metal oxides, carbon-based materials to natural fibers [12,13]. It could be consequently understood that the utilization of glass based reinforcements has been widely reported in the enhancement of mechanical properties of composites [14,15].…”