摘要：In this work, graphene/carboxymethyl cellu-lose/Ti02 composites (GR/CMC/Ti〇2) was synthesized and used as an adsorbent for the removal of malachite green (MG) from aqueous solution. Fourier transform infrared (FTIR), X-ray diffraction (XRD), Raman spectroscopy, thermal gravity (TG) and scanning electron microscope (SEM) analysis were used to investigate the morphological and thermal properties of the prepared adsorbent. The influences of several parameters such as the dosage of absorbent, adsorption temperature and contact time on the adsorption capacity were studied. The adsorption kinetic data followed both pseudo second-order kinetics and equilibrium adsorption data for adsorbents best represented by Freundlich isotherm model with maximum monolayer adsorption capacity of 66.67 mg/g. The value of AG° was found to be negative, indicating feasibility and spontaneity of the adsorption process. When the adsorption-desorption process was repeated five times, the composite still had high adsorption capacity. The obtained results indicated that the GR/CMC/TiO2 composites material is a high-performance adsorbent which could be applied to adsorb MB from wastewater.
关键词：Adsorption;graphene;Ti〇2;carboxymethyl cellulose;composites;malachite green
