Open AccessCalcium alginate-TiO2/SiO2 nanocomposite for glucose conversion to 5-hydroxymethylfurfural
Author(s) -
Indah Lestari,
H. Helmiyati
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/763/1/012037
Subject(s) - nanocomposite , tetraethyl orthosilicate , calcium alginate , materials science , chemical engineering , fourier transform infrared spectroscopy , biopolymer , scanning electron microscope , calcium , particle size , nuclear chemistry , composite material , chemistry , polymer , nanotechnology , metallurgy , engineering
The sodium alginate biopolymer used to form calcium alginate-TiO2/SiO2 nanocomposite has been successfully synthesized. The first stage is synthesis of TiO2/SiO2 composites by the sol-gel method using tetraethyl orthosilicate (TEOS) and titanium isopropoxide (TTIP) precursors. Calcium alginate nanocomposite is formed from the crosslinking process between Ca 2+ ions from CaCl 2 .2H 2 O with sodium alginate combined with TiO 2 /SiO 2 composites, characterized by Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM) and Tunneling Electron Microscopy (TEM). The average particle size of TiO 2 /SiO 2 composite on the surface of calcium alginate obtained by TEM is about 50 nm. The application of calcium alginate-TiO 2 /SiO 2 nanocomposite as catalyst is used for conversion of glucose into 5-hydroxymethylfurfural (HMF) using dimethyl sulfoxide (DMSO) solvents. The best glucose conversion obtained at 140 °C for 4 hours is 97 % and optimum HMF yield obtained at 140 °C and 5 hours is 40 %. Nanocomposites based on sodium alginate biopolymers combined with TiO 2 /SiO 2 composites can be developed as new superior materials and promising catalysts because it is easily obtained and biodegradable.