Cellulose biotemplates for layered double hydroxides networks

• DOI: 10.1016/j.micromeso.2015.12.009
• Publication Date: 2015-12-17T21:02:31Z
• Authors: S.S. Liji Sobhana; Dhani Raj Bogati; Mehedi Reza; Jan Gustafsson; Pedro Fardim
• Keywords: Thermogravimetric analysis; Layered double hydroxides; Specific surface area; BET theory; Microcrystalline

Abstract Synthesis of porous network structures of layered double hydroxides (LDH) has been studied using microcrystalline cellulose (MCC) as a hard template. LDH was synthesized using cellulose as biotemplate and post treated by microwave hydrothermal treatment (MWHT). The prepared LDHs were thoroughly characterized by Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) spectroscopy, X-ray Diffraction (XRD) studies, and Thermogravimetric (TGA) analysis, which proved the formation of LDH structure in the presence and absence of MCC as templates. The morphological structures of the composite materials were analyzed by Scanning Electron Microscopy (SEM), which showed that the LDH formed in the presence of cellulose had porous network structures, while LDH particles synthesized in the absence of the MCC exhibited a hexagonal platelet-like morphology. Energy Dispersive X-ray (EDX) measurements confirmed the presence of essential elements in the particles. TEM showed the fibrillar nature and size reduction of the particles. The surface area of the material was measured by Brunauer–Emmett–Teller (BET) analysis, exhibiting a twofold increase in surface area and increased specific pore volume in comparison with particles synthesized in absence of cellulose and thus showcasing the potential of MCC as templates for production of porous LDH with high surface area (152 m 2 /g). Further, the adsorption capacities of the materials were evaluated with orange II dye.