The influence of aging time of hydrothermal synthesis on textural properties of Fe-SBA-15 materials
Textural properties of Fe-SBA-15 materials by controlling aging time of hydrothermal synthesis were investigated. Iron-substituted SBA-15 materials (Fe-SBA-15) have been synthesized via a hydrothermal method with in situ incorporation of Fe(III) oxalate complex under strong acidic conditions. By employing the characterization techniques of XRD, UVVis, AAS and the physical adsorption of N2 in combination with s-plot method, the textural properties of Fe-SBA-15 materials with different aging time spans of hydrothermal synthesis were investigated. The resulting Fe-SBA-15 samples exhibited highly ordered mesoporous features. As the aging time extends over a certain value, the textural properties and amount of Fe incorporated to SBA-15 changed dramatically. The total surface areas increased due to the significant increase in the micropore after the 24-hour aging time, however, the wall thickness of the mesopore and the amount of iron formed in Fe-SBA-15 declined remarkably. The desired textural properties and high amount of Fe incorporated into SBA-15 could be attained by controlling the aging time of synthetic gel.
Nguyen Huu Phu Dinh Quang Khieu Dang Tuyet Phuong
Institute of Chemistry, Vietnam Academy of Science and Technology Hue University
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）