| 负载Cr(VI)纳米Fe_3O_4磁性高分子材料的催化性能 |
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| 引用本文： | 王乐屏,赵永纲,沈昊宇,茅旗峰,夏清华.负载Cr(VI)纳米Fe_3O_4磁性高分子材料的催化性能[J].中国科学:化学,2010(11):1575-1583. |
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| 作者姓名： | 王乐屏 赵永纲 沈昊宇 茅旗峰 夏清华 |
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| 作者单位： | [1]浙江大学宁波理工学院生物与化学工程分院,宁波315100 [2]浙江大学理学院,杭州310027 [3]有机功能分子合成与应用教育部重点实验室,湖北大学,武汉430062 |
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| 基金项目： | 有机功能分子合成与应用教育部重点实验室项目（2007-KL-2007）; 浙江省科技平台研究项目（2007F0045）; 宁波市自然科学基金项目（2009A610002）资助 |
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| 摘 要： | 采用氨基功能化纳米Fe3O4磁性高分子材料(NH2-NMPs)处理含Cr(VI)水溶液,得到了吸附重金属Cr(VI)后回收材料(Cr-NH2-NMPs).通过透射电镜(TEM)、振动样品磁强计(VSM)、热重差热分析(TGA)、X射线粉末衍射(XRD)、红外光谱(FTIR)等对其进行表征.着重研究了以苯甲醇为底物,30%的H2O2为氧化剂,Cr-NH2-NMPs对醇的选择性氧化的催化性能.详细考察了H2O2用量与加入方式、反应时间、反应温度、反应体系中加入酸的种类与用量、催化剂用量、溶剂种类等因素对催化氧化性能的影响,推导出可能的催化机理.结果表明:吸附重金属Cr(VI)后回收材料(Cr-NH2-NMPs)能有效催化苯甲醇氧化至苯甲醛.反应温度为70℃,环己烷为溶剂,在适量质子酸作用下,H2O2与苯甲醇的物质的量比为3.2:1时,苯甲醇的转化率及苯甲醛的选择性均达100%,可以实现"变废为宝"的目的.
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| 关 键 词： | Fe3O4磁性高分子材料 负载Cr（VI） 苯甲醇 H2O2 选择性催化氧化 |
The catalytic properties investigation of the Cr（VI）-loaded nano Fe3O4 magnetic polymers |
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| WANG LePing,ZHAO YongGang,SHEN HaoYu,MAO QiFeng,＆XIA QingHua.The catalytic properties investigation of the Cr（VI）-loaded nano Fe3O4 magnetic polymers[J].Scientia Sinica Chimica,2010(11):1575-1583. |
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| Authors: | WANG LePing ZHAO YongGang SHEN HaoYu MAO QiFeng ＆XIA QingHua |
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| Institution: | 1 School of Biological and Chemical Engineering,Ningbo Institute of Technology,Zhejiang University,Ningbo 315100,China 2 College of Science,Zhejiang University,Hangzhou 310027,China 3 Key Laboratory for the Synthesis and Application of Organic Functional Molecules,Ministry of Education;School of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China |
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| Abstract: | A new kind of recycled Cr（VI） -loaded nano Fe3O4 magnetic polymers（Cr-NH2-NMPs） was obtained by using amino-functionalized nano Fe3O4 magnetic polymers（NH2-NMPs） for the removal of chromium（VI） from water.The Cr-NH2-NMPs was characterized by TEM,VSM,TGA,XRD,FTIR,etc.The catalytic properties of Cr-NH2-NMPs on the selective oxidation of benzyl alcohol have been investigated,in which,30%H2O2 was used as oxidant.The effects of a variety of factors,e.g.the usage amount of H2O2 and its adding mode,reaction time,reaction temperature,reaction solvent,usage amount of catalyst,and kinds of acids,were investigated.Presumed catalytic mechanism has been presented.The results showed that high catalytic activity can be obtained at optimized reaction condition,i.e.,reaction temperature of 70 oC,with cyclohexane as solvent,suitable amount of Brφnsted acid and the molar ratio of H2O2 to alcohol at 3.2.The conversion of benzyl alcohol and selectivity of benzaldehyde both can be reached to 100%.The aim of＂turning waste into wealth＂can be realized. |
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| Keywords: | Fe3O4 magnetic polymers （NH2-NMPs） Cr（VI）-loaded benzyl alcohol hydrogen peroxide catalytic selective oxidation |
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