wereinvestigatedbybreakthroughCHIVESandTPDtechniques.Theexperimentalresultsshowedthatthe adsorptioncapacitydeclinedwhiledesorptiontemperaturewentdownwhencrystallizationtemperature wentupfrom80℃to135oC.AdsorptioncapacityoftheSBA一15forethylacetatewasmuchhigherthan
考察了研磨对经不同脱模方法得到的SBA-15介孔分子筛的结构的影响.用N2吸附-脱附、XRD、FT-IR、29Si CP MAS NMR等手段对样品的结构进行了表征,发现研磨对SBA-15的`孔结构有一定的破坏作用,导致样品的长程有序性降低,表面积、孔容下降,孔径减小.同时,研磨增加了孔壁中的结构缺陷,机械压力使孔壁发生了收缩,壁中...
15products.Theproducts werecalcinedtoimprovethecrystallizationofTiO2andtoremovetheorganiccompounds.As —obtainedTiOJSBA一15 photocatalystswerecharacterizedbyX— raydiffraction(XRD),nilrogenadsorption,Fouriertransforminfrared(FI—IR) spectroscopy,andtransmissionelectronmicroscopy(TEM).Analyticalresultsshowedthatt ...
15were bychelating catalystssupported prepared ofCU2+with theSBA一15 andweretestedforselective of crotonaldehyde. support hydrogenation The 5 withdifferentCuO were CuO/SBA.1 loadings catalysts characterized sorption,andhydrogen diffraction(XRD),N2 byX-ray 摘要 resultsshowed temperature-programmedreduction(H2...
Abstract:Amino -functionalized SBA -15mesoporous materials were synthesized by a one -pot strategy.The synthesized materials were characterized by different techniques such as XRD,N 2adsorption -desorption,and TEM.The results show that all the obtained materials have a typical meso -SBA -15structure ...
werecalcinedtoimprovehtecrystallizationofTiO2andtoremovetheorganiccompounds.As—obtainedTiOJSBA一15 photocatalystswerecharacterizedbyX—raydiffraction (XRD),nilrogenadsorption,Fouriertransfomr infrared(FI—IR) spectroscopy,andrtansmissionelectronmicroscopy(TEM).Analyticalresultsshowedhtattheas—obtainedTiOJSBA一15 ...
(北京化工大学,化工资源有效利用国家重点实验室,北京 100029) 摘要 :以磷酸氢二铵为磷源 ,硝酸镍为镍源,硝酸铝为助剂铝源 ,制备 了n/nNi=0.8,A1含量为 1.06wt% 6.35wt%的一系列 Al— Ni,PS/BA一15催化剂 采用 XRD、TEM和N,吸脱附等技术对催化剂 的结构进行了表征研究,以二苯并噻吩fDB.n作为模型化合...
以不同含量四乙烯五胺(TEPA)对 SBA-15 进行功能化, 获得 氨基功能化介孔 SBA-15 材料. 利用 X 射线衍射(XRD),N2 吸-脱附,傅里叶红外光谱(FT-IR),扫描电子显微镜 (SEM),透射电子显微镜(TEM),元素分析等手段对材料结构性能进行表征. 以不同含量 TEPA 功能化介孔 SBA-15 为吸附剂, 对 CO2 进行吸附, ...
The XRD results show that two dimensional p6mm of high order hexagonal mesoscopic structure of VTES/SBA-15 could not be retained at higher temperature of calcination than 700°C. However, the higher time spans of calcination up to 8 hrs preserve the long-range order of functionalized SBA-15...
温度却比较低,40%(Cu【Jl25Co075)/SBA.15 的催化剂 活性最高.结合XRD 表征结果可知,当X≥0.5 时, 出现CuO 的衍射峰.由此可见,CuO 的存在降低了 催化剂的活性. 表2 催化剂样品的XPS 结果 Table2XPSresultsofthepreparedcatalystsamples ! 0.2X02 X025 --- A~x=0"8 (c)/ 一 —...