采用硝酸铝为铝源,碳酸铵为沉淀剂,聚乙二醇(PEG1450)为模板剂,合成廉价的有序介孔氧化铝(OMA)作为吸附剂载体。以2-氨基-2-甲基-1-丙醇(AMP)为氨基化表面修饰剂,对OMA采用过量浸渍法进行表面氨基化,制备一种高性能低成本的二氧化碳吸附...采用硝酸铝为铝源,碳酸铵为沉淀剂,聚乙二醇(PEG1450)为模板剂,合成廉价的有序介孔氧化铝(OMA)作为吸附剂载体。以2-氨基-2-甲基-1-丙醇(AMP)为氨基化表面修饰剂,对OMA采用过量浸渍法进行表面氨基化,制备一种高性能低成本的二氧化碳吸附剂OMA-AMP。通过BET法比表面积测定、X射线衍射(XRD)、透射电镜(TEM)、红外光谱(IR)等表征方法对改性前后吸附剂的比表面积、孔结构等特性进行表征,结果表明制备的OMA-AMP具有比表面积大、孔径分布窄、孔结构有序等特点。利用模拟烟道气,从浸渍时间、吸附床层温度、气体流量以及AMP浓度4个变量考察吸附剂的性能。结果表明,OMA经过质量分数为50%的AMP浸渍12 h,在吸附温度为70℃、气体流量为40 m L/min条件下,OMA-AMP对二氧化碳的吸附量高达84.15 mg/g;吸附剂吸附性能较稳定,再生容易且效果良好;吸附剂制备成本低廉,吸附效率高。该吸附剂可以解决在二氧化碳捕集技术中成本居高不下的问题,在工业上具有实际应用价值。展开更多
Titanium-doped ordered mesoporous alumina with specific structural properties has been prepared by the evaporation induced self-assembly sol-gel method. The results show that the doped titanium helps to stabilize the ...Titanium-doped ordered mesoporous alumina with specific structural properties has been prepared by the evaporation induced self-assembly sol-gel method. The results show that the doped titanium helps to stabilize the ordered mesoporous alumina material without influencing the ordered mesoporosity. The textural properties of the obtained sample are related to the amount of doped titanium. When the molar ratio of aluminum to titanium （n（Al）/n（Ti）） is controlled as 10.2, the titanium-doped ordered mesoporous alumina exhibits high surface area （up to 218 m^2 g^-1）, large pore volume （0.42 cm^3 g^-1） and narrow pore diameter （6.1 nm） after treating at 900 ℃, showing high thermal stability. Moreover, the obtained sample calcined at 900 ℃ still maintains ordered mesoporous structure and exhibits high thermal stability.展开更多
有序介孔氧化铝具有较大的比表面积、均匀且窄的孔径分布、有序的孔结构等特点,在多相催化反应及吸附分离过程中具有十分重要的应用价值,研究其合成及应用具有重要意义。以廉价的无机铝盐为铝源,结合模板剂,利用溶胶-凝胶法,通过改变模...有序介孔氧化铝具有较大的比表面积、均匀且窄的孔径分布、有序的孔结构等特点,在多相催化反应及吸附分离过程中具有十分重要的应用价值,研究其合成及应用具有重要意义。以廉价的无机铝盐为铝源,结合模板剂,利用溶胶-凝胶法,通过改变模板剂的种类、老化时间和温度等影响因素,制备有序介孔氧化铝。采用多种测试技术对其结构进行表征,探讨不同反应条件对合成有序介孔氧化铝结构的影响规律。结果表明,以二正丙胺为模板剂,在40℃条件下老化48 h,可合成比表面积为324.80 m 2·g^(-1),孔容为0.62 cm 3·g^(-1),平均孔径为6.07 nm的介孔氧化铝,且孔径分布较窄,孔道有序性良好。展开更多
An efficient and convenient one-step process was developed for synthesizing new effective red luminous materials through ordered mesoporous γ-alumina assembling with Eu3＋. Employing P123 as a structure-directing age...An efficient and convenient one-step process was developed for synthesizing new effective red luminous materials through ordered mesoporous γ-alumina assembling with Eu3＋. Employing P123 as a structure-directing agent and hydrochloric acid, citric acid as pH adjustor, ordered mesoporous γ-alumina was fabricated by simple sol-gel method. The pore structure was characterized by X-ray diffraction （XRD）, N2 adsorption-desorption isotherms and transmission electron microscopy （TEM）. The as-synthesized γ-aluminas had narrow pore-size distribution （5–7 nm）, large surface area （246 m2/g） and high thermal stability （750–1000 oC）. The luminous property of materials was characterized by Photoluminescence （PL） spectra. The γ-Al2O3：Eu3＋ materials had efficient luminescence, and the emission strength was related to the content of Eu3＋.展开更多
文摘采用硝酸铝为铝源,碳酸铵为沉淀剂,聚乙二醇(PEG1450)为模板剂,合成廉价的有序介孔氧化铝(OMA)作为吸附剂载体。以2-氨基-2-甲基-1-丙醇(AMP)为氨基化表面修饰剂,对OMA采用过量浸渍法进行表面氨基化,制备一种高性能低成本的二氧化碳吸附剂OMA-AMP。通过BET法比表面积测定、X射线衍射(XRD)、透射电镜(TEM)、红外光谱(IR)等表征方法对改性前后吸附剂的比表面积、孔结构等特性进行表征,结果表明制备的OMA-AMP具有比表面积大、孔径分布窄、孔结构有序等特点。利用模拟烟道气,从浸渍时间、吸附床层温度、气体流量以及AMP浓度4个变量考察吸附剂的性能。结果表明,OMA经过质量分数为50%的AMP浸渍12 h,在吸附温度为70℃、气体流量为40 m L/min条件下,OMA-AMP对二氧化碳的吸附量高达84.15 mg/g;吸附剂吸附性能较稳定,再生容易且效果良好;吸附剂制备成本低廉,吸附效率高。该吸附剂可以解决在二氧化碳捕集技术中成本居高不下的问题,在工业上具有实际应用价值。
基金the financial support from the National Natural Science Foundation of China(No.51103024)Joint Research Program of Fuzhou University(No.DH-700)
文摘Titanium-doped ordered mesoporous alumina with specific structural properties has been prepared by the evaporation induced self-assembly sol-gel method. The results show that the doped titanium helps to stabilize the ordered mesoporous alumina material without influencing the ordered mesoporosity. The textural properties of the obtained sample are related to the amount of doped titanium. When the molar ratio of aluminum to titanium （n（Al）/n（Ti）） is controlled as 10.2, the titanium-doped ordered mesoporous alumina exhibits high surface area （up to 218 m^2 g^-1）, large pore volume （0.42 cm^3 g^-1） and narrow pore diameter （6.1 nm） after treating at 900 ℃, showing high thermal stability. Moreover, the obtained sample calcined at 900 ℃ still maintains ordered mesoporous structure and exhibits high thermal stability.
文摘有序介孔氧化铝具有较大的比表面积、均匀且窄的孔径分布、有序的孔结构等特点,在多相催化反应及吸附分离过程中具有十分重要的应用价值,研究其合成及应用具有重要意义。以廉价的无机铝盐为铝源,结合模板剂,利用溶胶-凝胶法,通过改变模板剂的种类、老化时间和温度等影响因素,制备有序介孔氧化铝。采用多种测试技术对其结构进行表征,探讨不同反应条件对合成有序介孔氧化铝结构的影响规律。结果表明,以二正丙胺为模板剂,在40℃条件下老化48 h,可合成比表面积为324.80 m 2·g^(-1),孔容为0.62 cm 3·g^(-1),平均孔径为6.07 nm的介孔氧化铝,且孔径分布较窄,孔道有序性良好。
基金Project supported by the National Natural Science Foundation of China (21071063, 50872045)
文摘An efficient and convenient one-step process was developed for synthesizing new effective red luminous materials through ordered mesoporous γ-alumina assembling with Eu3＋. Employing P123 as a structure-directing agent and hydrochloric acid, citric acid as pH adjustor, ordered mesoporous γ-alumina was fabricated by simple sol-gel method. The pore structure was characterized by X-ray diffraction （XRD）, N2 adsorption-desorption isotherms and transmission electron microscopy （TEM）. The as-synthesized γ-aluminas had narrow pore-size distribution （5–7 nm）, large surface area （246 m2/g） and high thermal stability （750–1000 oC）. The luminous property of materials was characterized by Photoluminescence （PL） spectra. The γ-Al2O3：Eu3＋ materials had efficient luminescence, and the emission strength was related to the content of Eu3＋.
