Al掺杂SBA-15介孔材料的合成与吸附性能研究
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摘要
采用两步水热法合成了Al掺杂SBA-15介孔分子筛,并且用XRD、SEM、N2吸附与UV-Vis对所合成的样品进行表征。考察了Al掺杂SBA-15介孔分子筛的有序度、表面形貌、比表面积、Si/Al比以及对亚甲基蓝吸附性能的影响。结果表明:介孔材料保持了完好的二维六方介孔结构,表面形貌无变化,比表面积减小,铝元素均匀地掺杂于SBA-15的骨架当中,Si/Al约为21. 4; Al掺杂SBA-15对水溶液中的亚甲基蓝展现出良好的吸附性能,在15min内,吸附率达96%。
Al doped SBA-15 mesoporous molecular sieve was synthesized by two-step hydrothermal method,the synthesized samples were characterized by XRD,SEM,N2 adsorption and uv-vis. The order,surface morphology,specific surface area,Si/Al ratio and the influence of Al doped SBA-15 mesoporous molecular sieve on the adsorption property of methylene blue were investigated. The results showed that the doping of Al into the framework of SBA-15 had been achieved. As for the synthesis of the Al-SBA-15,the molar ratio of Si/Al in the framework was21. 4,the specific surface area decreased,and the mesostructure kept remained completely. The Al-doped SBA-15 showed good adsorption property for the methylene blue organic dye in aqueous solution,and the adsorption rate of methylene blue organic dye reached 96% within 15 min.
Al doped SBA-15 mesoporous molecular sieve was synthesized by two-step hydrothermal method,the synthesized samples were characterized by XRD,SEM,N2 adsorption and uv-vis. The order,surface morphology,specific surface area,Si/Al ratio and the influence of Al doped SBA-15 mesoporous molecular sieve on the adsorption property of methylene blue were investigated. The results showed that the doping of Al into the framework of SBA-15 had been achieved. As for the synthesis of the Al-SBA-15,the molar ratio of Si/Al in the framework was21. 4,the specific surface area decreased,and the mesostructure kept remained completely. The Al-doped SBA-15 showed good adsorption property for the methylene blue organic dye in aqueous solution,and the adsorption rate of methylene blue organic dye reached 96% within 15 min.
引文
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[13]Shi L,Xu Y,Zhang N,et al. Direct synthesis of Al-SBA-15 containing aluminosilicate species plugs in an acid-free medium and structural adjustment by hydrothermal post-treatment[J].Journal of Solid State Chemistry,2013,203:281-290.
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[16]孙剑平,郝雪,陈士忠,等. 5A沸石和AlSBA-15分子筛对Cd2+吸附性能比较研究[J].沈阳建筑大学学报,2017,33(6):1132-1140.
[2]Li Y,Sun J,Du Q,et al. Mechanical and dye adsorption properties of grapheme oxide/Chito-san composite fibers prepared by wet spinning[J].Carbohydrate Polymers,2014,102(15):755-761.
[3]Zawahry M M,Abdelghaffar F,Abdelghaffar R A,et al. Equilibrium and kinetic models on the adsorption of Reactive Black 5 from aqueous solution using Eichhornia crassipes/chitosan composite[J]. Carbohydrate Polymers,2016,136(20):507-515.
[4]Gupta V K. Application of low-cost adsorbents for dye removal-A review[J]. Journal of Environmental Management,2009,90(8):2313-2342.
[5]Rafatullah M,Sulaiman O,Hashim R,et al. Adsorption of methylene blue on low-cost adsorbents:A review[J]. Journal of Hazardous Materials,2010,177(1-3):70-80.
[6]Ghaedi M,Reza Rahimi M,Ghaedi A,et al. Application of least squares support vector regression and linear multiple regression for modeling removal of methyl orange onto tin oxide nanoparticles loaded on activated carbon and activated carbon prepared from Pistacia atlantica wood[J]. Journal of Colloid and Interface Science,2016,461(1):425-434.
[7]Ali I,Gupta V. Advances in water treatment by adsorption technology[J]. Nature Protocols,2006(1):2661-2667.
[8] Shiori K B,Katsunori K. Salt-induced formation of uniform fiberlike SBA-15 mesoporous silica particles and application to toluene adsorption[J].Langmuir,2007,23(23):11761-11768.
[9] Dong Z P,Tian X,Chen Y Z,et al. Rhodamine group modified SBA-15 fluorescent sensor for highly selective detection of Hg2+and its application as an INHIBIT logic device[J]. RSC Advances,2013(3):2227-2233.
[10]周仁丹,李来生,程彪平,等.新型双β-环糊精键合SBA-15液相手性固定相的制备及评价[J].化学学报,2014(6):720-730.
[11]吴淑杰,黄家辉,吴通,等. Al-SBA-15介孔分子筛的合成、表征及其在苯酚叔丁基化反应中的催化性能[J].催化学报,2016,27(1):9-14.
[12]Chen S Y,Jang L Y,Cheng S F. Synthesis of ZrIncorporated SBA-15 mesoporous materials in a self-generated acidic environment[J]. Chemistry of Materials,2004,16:4174-4180.
[13]Shi L,Xu Y,Zhang N,et al. Direct synthesis of Al-SBA-15 containing aluminosilicate species plugs in an acid-free medium and structural adjustment by hydrothermal post-treatment[J].Journal of Solid State Chemistry,2013,203:281-290.
[14]Zhang H L,Tang C J,Lv Y Y,et al. Synthesis,characterization,and catalytic performance of copper-containing SBA-15 in the phenol hydroxylation[J]. Journal of Colloid and Interface Science,2012,380:16-24.
[15]Song C X,Zhang X L,Jia C Y,et al. Highly sensitive and selective fluorescence sensor based on functional SBA-15 for detection of Hg2+in Aqueous Media[J]. Talanta,2010,81(1-2):643-649.
[16]孙剑平,郝雪,陈士忠,等. 5A沸石和AlSBA-15分子筛对Cd2+吸附性能比较研究[J].沈阳建筑大学学报,2017,33(6):1132-1140.
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