树枝状高分子改性Fe3O4-氧化石墨烯纳米杂化材料的制备及其对水溶液中重金属离子的吸附性能研究
Project Number51403091
马应霞
Abstract重金属水污染已经对人类健康、生物资源、生态环境和社会经济的可持续发展造成严重威胁,如何有效去除水体中的重金属受到了世界各国政府和研究者们的极大关注。本项目采用原位复合法制备Fe3O4-氧化石墨烯纳米杂化材料,采用超支化法在Fe3O4-氧化石墨烯纳米杂化材料表面接枝上树枝状高分子进行改性,旨在提高其对水溶液中重金属离子的吸附容量、吸附速率和吸附选择性。主要是通过控制树枝状高分子的生成代数和端基的种类调控外层富集的官能团的性质和数量以及形成的分子空腔的大小和数量,从而控制改性材料吸附Cr(VI)、Cd(II)、Pb(II)、Hg(II)和As(V)等重金属离子活性位点的性质和数量达到对其吸附容量、吸附速率和吸附选择性的控制。同时,对其吸附机制、动力学、热力学和等温吸附进行较为深入的理论分析,实现吸附剂的再生和重复使用。【英文摘要】Thewaterpollutionbyheavymetalshasbecometheseriousthreattothehumanhealth,livingresources,ecologicalsystemsandthesustainabledevelopmentofsocialeconomy.Howtoeffectivelyremovetheheavymetalsinaqueoussolutionhasbeenattractedgreatattentionbyresearchersandthegovernmentsaroundtheword.Inthisproject,Fe3O4–GOnanohybridmaterialwillbepreparedbyinsitusynthesismethod.Subsequently,Fe3O4–GOnanohybridmaterialwillbechemicalgraftmodifiedwithdendrimerbysyntheticreactionsofhyperbranchedpolymersinordertoimprovetheadsorptioncapacity,adsorptionrateandadsorptionselectivityofthenanohybridmaterialforheavymetalionsinaqueoussolution.Herein,thecharacteristicsandquantityoffunctionalgroups,aswellasthesizeandquantityofthemolecularcavityformedontheFe3O4–GOnanohybridmaterialwillbecontrolledbythegenerationnumbersandendgroupsofdendrimers,resultinginthepropertiesandquantityofactivesiteforadsorptionofCr(VI),Cd(II),Pb(II),Hg(II)andAs(V),whichthenleadstooptimizedtheadsorptioncapacity,adsorptionrateandadsorptionselectivityoftheFe3O4–GOnanohybridmaterialforheavymetalions.Simultaneously,theadsorptionmechanism,dynamics,thermodynamicsandisothermaladsorptionwillbefurtheranalyzedtheoretically,andthentheregenerationandrecyclingusesoftheadsorbentwillbeachieved.
Subtype青年科学基金项目
Project Source国家自然科学基金
2015-01
End Date2017-12
MOST Discipline Catalogue10 - 材料科学 ; 1003 - 有机高分子材料
Host Institution兰州理工大学
Project Funding250000.0
CountryCN
Language中文
Document Type项目
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64734
Collection材料科学与工程学院
Recommended Citation
GB/T 7714
马应霞.树枝状高分子改性Fe3O4-氧化石墨烯纳米杂化材料的制备及其对水溶液中重金属离子的吸附性能研究.2015.
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