Article(id=1319986874651885570, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319986871980118160, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20210630, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1628265600000, receivedDateStr=2021-08-07, revisedDate=1639152000000, revisedDateStr=2021-12-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1792638995087, onlineDateStr=2026-10-22, pubDate=1652976000000, pubDateStr=2022-05-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792638995087, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792638995087, creator=13701087609, updateTime=1792638995087, updator=13701087609, issue=Issue{id=1319986871980118160, tenantId=1146029695717560320, journalId=1263187385517883426, year='2022', volume='50', issue='5', pageStart='1201', pageEnd='1454', issueExtLink='null', onlineDate='null', pubDate='1652976000000', pubDateStr='2022-05-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1792638994450, creator='13701087609', updateTime=1792639285419, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1319988092451275233, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319986871980118160, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1319988092451275234, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319986871980118160, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1364, endPage=1374, ext={EN=ArticleExt(id=1319986874832240643, articleId=1319986874651885570, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Preparation of Amine-Functionalized Fe₃O₄@SiO₂ Nanoparticles for Removal of Cr(VI) from Aqueous Solution, columnId=1263922769897599102, journalTitle=Journal of the Chinese Ceramic Society, columnName=Research Articles, runingTitle=null, highlight=null, articleAbstract=

Hexavalent chromium (Cr(VI)) has attracted much attention due to its high toxicity. In order to improve the efficiency of Cr(VI) removal by adsorption, core-shell structured polyethyleneimine (PEI) functionalized composite nanoparticles (Fe₃O₄@SiO₂-NH₂) were synthesized to remove Cr(VI) in water. The chemical structure, morphology and magnetic properties of the nanoparticles were investigated. The effects of initial concentration, contact time, solution pH value and inorganic anions on the Cr(VI) adsorption efficiency were analyzed. The results show that Fe₃O₄@SiO₂-NH₂ has an excellent performance in removing Cr(VI), and its maximum adsorption capacity is 251.83 mg/g. The adsorption process is pH value-dependent, spontaneous, and endothermic. Fe₃O₄@SiO₂-NH₂ is protonated, and the adsorption of Cr(VI) is completed due to the electrostatic attraction. Also, according to the results by X-ray photoelectron spectroscopy, part of Cr(VI) can be reduced to low-toxic Cr(VI). Fe₃O₄@SiO₂-NH₂ has a good reusability after removing Cr(VI) in water, and the duration for effective magnetic separation after the removal is just 50 s.

, authors=Xuqing WAN, Han SUN, Lei WANG, Xudong WANG, Wanying WANG, Tian PEI, authorsList=Xuqing WAN, Han SUN, Lei WANG, Xudong WANG, Wanying WANG, Tian PEI, authorCompany=null, correspAuthors=Lei WANG, authorNote=, correspAuthorsNote=, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1319986875075510276, articleId=1319986874651885570, tenantId=1146029695717560320, journalId=1263187385517883426, language=CN, title=胺化Fe₃O₄@SiO₂纳米颗粒的制备及其对水溶液中Cr(VI)的去除, columnId=1263922770220560512, journalTitle=硅酸盐学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=

六价铬（Cr（VI））因其高毒性受到人们广泛关注，为提高吸附法去除Cr（VI）的效率，合成了一种新型核壳结构的聚乙烯亚胺（PEI）功能化复合纳米颗粒（Fe₃O₄@SiO₂-NH₂），用于去除水中Cr（VI）。研究了磁性纳米颗粒的化学结构、形貌和磁性特性。考察了初始浓度、吸附时间、溶液pH值和无机阴离子对Cr（VI）吸附效率的影响。Fe₃O₄@SiO₂-NH₂在去除Cr（VI）方面表现出优异的性能，其最大吸附容量为251.83 mg/g。吸附过程具有pH值依赖性，自发性，吸热性。Fe₃O₄@SiO₂-NH₂质子化，通过静电吸引完成对Cr（VI）的吸附。同时X射线光电子能谱结果表明，部分Cr（VI）被还原为低毒的Cr（III）。Fe₃O₄@SiO₂-NH₂去除水中Cr（VI）时具有良好的重复使用性，且磁选时间仅需50 s。

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