Preparation and adsorption properties of mesoporous material PS-MCM-41 with low-silicon content peanut shell ash as silicon source

Abstract

The toxic and costly chemicals are usually used as the source of silicon for the synthesis of mesoporous materials. In this paper, the mesoporous material PS-MCM-41 was synthesized by hydrothermal synthesis, in which low-silicon content peanut shell ash is used as the silicon source. The properties of the obtained material were confirmed by N2 physical adsorption, X-ray diffraction (XRD), SEM, TEM, and FTIR. The adsorption performance was evaluated during the adsorption experiment of crystal violet dye and compared with that of the mesoporous material MCM-41. The results showed that the peanut shell ash as silicon source could be used to successfully synthesize the mesoporous material PS-MCM-41. The adsorption efficiency of PS-MCM-41 to 50 mg/L crystal violet solution reached 99.90%, and the adsorption efficiency of PS-MCM-41 to 800 mg/L crystal violet solution reached 84.2%. Compared with MCM-41 and other adsorbents, PS-MCM-41 exhibited excellent adsorption properties and adsorption capacity for crystal violet. The adsorption kinetic data showed that the pseudo-secondary equation could better explain the adsorption data of the adsorption crystal violet. The adsorption isotherm model was consistent with the Langmuir model (R2> 0.99) with maximum adsorption capacities of 1428.57 mg/g.