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Synthesis of mesoporous silica materials with ascorbic acid as template via sol‐gel process
Author(s) -
Pang JieBin,
Qiu KnnYuan,
Wee Yen
Publication year - 2000
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20000180507
Subject(s) - ascorbic acid , chemistry , mesoporous material , mesoporous silica , transmission electron microscopy , chemical engineering , sorption , extraction (chemistry) , powder diffraction , scanning electron microscope , nuclear chemistry , chromatography , inorganic chemistry , organic chemistry , catalysis , crystallography , adsorption , materials science , composite material , food science , engineering
Mesoporous silica materials with pore diameters of 2–5 nm have been prepared using ascorbic add as a nonsurfactant template or pore‐forming agent in HCl‐catalyzed sol‐gel reactions of tetraethylorthosilicate, followed by removing the ascorbic acid compound by extraction with ethanol. Characterization results from nitrogen sorption isotherm, powder X‐ray diffraction and transmission electron microscopy indicate that me materials have large specific surface areas ( e.g . 1000 m 2 /g) and pore volumes ( e.g . 0.8 cm 3 /g). The mesoporosity is arisen from interconnecting disordered wormlike channels and pores with relatively broad size distributions. As the ascorbic acid concentration is increased, the pore diameters and pore volumes of the materials increase.