Organic templates P-123 of mesoporous SBA-15 can be effectively removed in a few minutes （4 min） by using the dielectric-barrier discharge （DBD） plasma technique at ambient pressure and low gas temperature （aroun...Organic templates P-123 of mesoporous SBA-15 can be effectively removed in a few minutes （4 min） by using the dielectric-barrier discharge （DBD） plasma technique at ambient pressure and low gas temperature （around 130℃）. The mesoporous SBA-15 was characterized by FT-IR, 29Si solid sate NMR, TEM, XRD, TGA and N2 adsorption/desorption isotherms. The as-made SBA-15 treated with DBD plasma exhibited a larger surface area of 790 m2 · g-1 with larger pores and microspore volume than samples prepared by using the conventional thermal calcination method （550 ℃ and 5 h, 660 m2 · g-1）. In addition to less shrinkage of the silica framework, the DBD-prepared SBA-15 showed significantly increased weight loss of 8.3% about 200℃ as compared with that of conventional calcination （5.5%）, which is attributed mainly to the dehydroxylation by condensation of silanol groups.展开更多
基金financially supported by National Natural Science Foundation of China (Nos. 21766026 and 21366026)the Leading Talent Project of Ningxia (No. KJT2016001)+2 种基金the National International Cooperation S & T Project of China (No. 2015DFA40660)the National First-Rate Discipline Construction Project of Ningxia (Chemical Engineering and Technology)the National Demonstration Center for Experimental Chemistry Education (Ningxia University)
文摘Organic templates P-123 of mesoporous SBA-15 can be effectively removed in a few minutes （4 min） by using the dielectric-barrier discharge （DBD） plasma technique at ambient pressure and low gas temperature （around 130℃）. The mesoporous SBA-15 was characterized by FT-IR, 29Si solid sate NMR, TEM, XRD, TGA and N2 adsorption/desorption isotherms. The as-made SBA-15 treated with DBD plasma exhibited a larger surface area of 790 m2 · g-1 with larger pores and microspore volume than samples prepared by using the conventional thermal calcination method （550 ℃ and 5 h, 660 m2 · g-1）. In addition to less shrinkage of the silica framework, the DBD-prepared SBA-15 showed significantly increased weight loss of 8.3% about 200℃ as compared with that of conventional calcination （5.5%）, which is attributed mainly to the dehydroxylation by condensation of silanol groups.
