The Synthesis and Characterization of Low-Cost Mesoporous Silica SiO2 from Local Pumice Rock

Nanomaterials and Nanotechnology

Mohammed Halim¹  Asmaa Mourhly¹  Mohammed Kacimi¹  Adnane El Hamidi¹  Said Arsalane¹  Mariam Khachani¹ 

关键词: Pumice rock;    Amorphous silica;    Nanoparticles;    Surface area;   

DOI  :  10.5772/62033

来源: InTech

【 摘 要 】

Pumice is a porous volcanic rock containing a significant proportion of silica and alumina, and which has a low iron content. This natural, silica-rich material attracts wide attention because of its applications in adsorption processes, heterogeneous catalysis and nanotechnology. In this contribution, the white amorphous silica nanoparticles were extracted using an optimized alkaline treatment and an acid-precipitation process using grey pumice powder. The isolated amorphous silica SiO2 was characterized via X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Transmission Electronic Microscopy (TEM-EDS), N2 adsorption/desorption measurements and simultaneous Thermal Gravimetry/Differential Thermal Analysis (TG/DTA). The obtained results indicated that the nanosilica powder was successfully prepared via the acid-base route with a predominantly amorphous mesoporous structure having a high surface area (422m2/g). The TEM images exhibited relatively homogeneous dispersed nanosilica parti...

【 授权许可】

Unknown