摘要
以粉煤灰为原料、EO_(20)PO_(70)EO_(20)(P123)为模板剂,采用碱溶-水热法制备出高度有序的介孔分子筛SBA-15;以3-氨丙基三乙氧基硅烷(APTES)为修饰剂对SBA-15进行表面氨基化。再用膦酰基乙酸(PAA)、二乙烯三胺五乙酸二酐(DTPADA)对其进一步功能化,合成材料PAA-SBA-15和DTPADA-SBA-15。通过小角XRD衍射、全反射红外、和氮气吸附对材料进行了分析和表征,并研究了材料对稀土元素Yb、Ho的吸附性能。结果表明,经过不同官能团修饰的材料依然具有良好的介孔结构;此外吸附结果表明,在pH值为6时,PAA-SBA-15对Ho、Yb的吸附效率分别为89.8%,94.4%;在pH值为2时,DTPADA-SBA-15对Ho、Yb的吸附效率为92.6%,89.0%。
In this study,SBA-15 with a high order degree was synthesized by alkali-hydrothermal synthesis method with fly ash as raw materials and EO20 PO 70 EO20(P123)as template agent.SBA-15 was modified through grafting amino group onto SBA-15 using 3-aminopropyltriethoxysilane(APTES),and further functionalized with phosphonoacetic acid(PAA)and diethylenetriaminepentaacetic dianhydride(DTPADA),respectively.The synthesized materials were characterized by N2 adsorption-desorption,small-angle XRD and Fourier transfer infrared spectrometer(ATR-FT-IR).Finally,with the modified SBA-15 as adsorbents rare earth elements(Yb and Ho)were studied.The results showed that the adsorption efficiencies of Ho and Yb for PAA-SBA-15 reached 89.8%,94.4%at pH 6,respectively.The adsorption efficiency of Ho and Yb for DTPADA-SBA-15 achieved 92.6%,89.0%at pH 2,respectively.
作者
柳向阳
崔静磊
柳丹丹
郭彦霞
程芳琴
LIU Xiangyang;CUI Jinglei;LIU Dandan;GUO Yanxia;CHENG Fangqin(State Environmental Protection Key Laboratory of Efficient Utilization Technology ofCoal Waste Resources,Shanxi Collaborative Innovation Center of High Value-added Utilization ofCoal-related Wastes,Institute of Resources and Environmental Engineering,Shanxi University,Taiyuan 030006,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2019年第4期4180-4186,共7页
Journal of Functional Materials
基金
粉煤灰高值利用关键技术与示范资助项目(2017YFB0603100)
