本文用3-氨基丙基三乙氧基硅烷(3-APTES)改性粘土岩,并通过X射线荧光光谱分析(XRF)、红外光谱仪(FT-IR)和扫描电子显微镜(SEM)对其进行了表征.结果显示,3-APTES改性粘土岩没有固定的表面结构,多为呈不规则多边型的薄片状晶体.以3-APTES...本文用3-氨基丙基三乙氧基硅烷(3-APTES)改性粘土岩,并通过X射线荧光光谱分析(XRF)、红外光谱仪(FT-IR)和扫描电子显微镜(SEM)对其进行了表征.结果显示,3-APTES改性粘土岩没有固定的表面结构,多为呈不规则多边型的薄片状晶体.以3-APTES改性粘土岩为吸附介质,探讨了反应时间、初始浓度、水相pH值、固液比、实验温度和离子种类等对该材料吸附U(Ⅵ)的影响.实验结果表明,pH为5、U(Ⅵ)初始浓度为50μg·mL^(-1)、固液比为1:200时,经过120 min 3-APTES改性粘土岩对U(Ⅵ)的吸附达到平衡,吸附效果最佳.升温有助于提高其吸附性能;溶液中Ca^(2+)、HCO_(3)^(-)、CO_(3)^(2-)等3种离子极大的抑制了3-APTES改性粘土岩的吸附性能.展开更多
Hexaphenyl cyclotrisilazane was synthesized from diphenyl dichlorosilane and ammonia with toluene as solvent.The effects of input material concentration, reaction temperature, ammonia flow rate and separation method o...Hexaphenyl cyclotrisilazane was synthesized from diphenyl dichlorosilane and ammonia with toluene as solvent.The effects of input material concentration, reaction temperature, ammonia flow rate and separation method on product yield were investigated.The structure of hexaphenyl cyclotrisilazane was characterized with FTIR and XRD.It was found that when diphenyl dichlorosilane concentration was 0.96 mol·L -1 , reaction temperature was 111—112℃,NH3 flow rate was 0.02 m3·h -1 , the yield of hexaphenyl cyclotrisilazane could reach 91.1%.Using ammonia water was better than hot filtration to weed out ammonium chloride at the period of product separation.It enhanced separation efficiency and simplified the process.At the same time it also decreased pollution to the environment by reducing volatile matter of toluene.展开更多
文摘本文用3-氨基丙基三乙氧基硅烷(3-APTES)改性粘土岩,并通过X射线荧光光谱分析(XRF)、红外光谱仪(FT-IR)和扫描电子显微镜(SEM)对其进行了表征.结果显示,3-APTES改性粘土岩没有固定的表面结构,多为呈不规则多边型的薄片状晶体.以3-APTES改性粘土岩为吸附介质,探讨了反应时间、初始浓度、水相pH值、固液比、实验温度和离子种类等对该材料吸附U(Ⅵ)的影响.实验结果表明,pH为5、U(Ⅵ)初始浓度为50μg·mL^(-1)、固液比为1:200时,经过120 min 3-APTES改性粘土岩对U(Ⅵ)的吸附达到平衡,吸附效果最佳.升温有助于提高其吸附性能;溶液中Ca^(2+)、HCO_(3)^(-)、CO_(3)^(2-)等3种离子极大的抑制了3-APTES改性粘土岩的吸附性能.
文摘Hexaphenyl cyclotrisilazane was synthesized from diphenyl dichlorosilane and ammonia with toluene as solvent.The effects of input material concentration, reaction temperature, ammonia flow rate and separation method on product yield were investigated.The structure of hexaphenyl cyclotrisilazane was characterized with FTIR and XRD.It was found that when diphenyl dichlorosilane concentration was 0.96 mol·L -1 , reaction temperature was 111—112℃,NH3 flow rate was 0.02 m3·h -1 , the yield of hexaphenyl cyclotrisilazane could reach 91.1%.Using ammonia water was better than hot filtration to weed out ammonium chloride at the period of product separation.It enhanced separation efficiency and simplified the process.At the same time it also decreased pollution to the environment by reducing volatile matter of toluene.
