Preparation sodium silicate from rice husk to synthesize silica nanoparticles by sol-gel method for adsorption water in analysis of methamphetamine
Supiyani Supiyani, Harry Agusnar, Purwantiningsih Sugita, Irwana Nainggolan
Abstract
Numerous uses of silica nanoparticles include medication delivery, lightweight aggregates, and energy storage. This work synthesized SiO2NPs from rice husk (RH) by a sol-gel extraction method. Fourier transform infrared (FTIR), Raman spectroscopy, X-ray diffraction (XRD), X-ray fluorescence (XRF), and scanning electron microscopy (SEM) with energy-dispersive X-ray (EDS) were used to analyze the extracted SiO2NPs. XRD diffraction indicates SiO2NPs, and the Debye Scherrer particle size equation shows that the particle size ranges between 43 and 97 nm. SEM image shows the structure of produced exhibits an agglomeration propensity. XRF results confirm that Si and EDS results confirm that Si and O. FTIR and Raman spectra show Si-O-Si and Si-O bonds. The adsorption of methamphetamine consistent with the Langmuir isotherm with a maximum adsorption capacity of 333.3 mg/g. The kinetic adsorption of methamphetamine consistent with the pseudo-second-order kinetic.