Sol-Gel Synthesis and Adsorption Properties of Mesoporous Silica with Mercapto Groups

Full text (.pdf)
Issue
Химия. Chemistry. 2018 11 (4)
Authors
Novikova, Svetlana A.; Parfenov, Vladimir A.; Zaitseva, Julia N.
Contact information
Novikova, Svetlana A.: Institute of Chemistry and Chemical Technology SB RAS FRC «Krasnoyarsk Science Center SB RAS» 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; ; Parfenov, Vladimir A.: Institute of Chemistry and Chemical Technology SB RAS FRC «Krasnoyarsk Science Center SB RAS» 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Zaitseva, Julia N.: Institute of Chemistry and Chemical Technology SB RAS FRC «Krasnoyarsk Science Center SB RAS» 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia
Keywords
SiO2; SBA-15; MPTMS; 123; mesoporous mesostructured silica; SiO2; SBA-15; (3-mercaptopropyl)trimethoxysilane; MPTMS; Pluronic 123; sol-gel method; co-condensation; sorption; palladium; mercury
Abstract

The mercapto-functionalized mesoporous silicas have been synthesized via a surfactant-templated sol-gel route using the Pluronic 123 as a directing agent and investigated by different physicochemical methods. Various amounts of (3-mercaptopropyl)trimethoxysilane (MPTMS) from 10 to 40 % relative to TEOS have been introduced during the sol-gel synthesis with and without TEOS prehydrolysis. The specific surface of the sorbents obtained is 300 to 700 m2/g. The accessibility of the surface is ensured by the pores with a diameter of 3 to 5 nm, which is confirmed by a directly proportional relationship between the sorption capacity and the sulfur content in the samples obtained. Hg(II) and Pd(II) sorption capacities are numerically comparable and found to be 0.7 mmol/g for sorbents containing 10 % MPTMS, and about 1 mmol/g for sorbents containing 20 % MPTMS

Pages
518-530
Paper at repository of SibFU
http://elib.sfu-kras.ru/handle/2311/109214