Fe3O4@P（St-co-OBEG）核壳结构微球负载银/铂纳米粒子复合催化剂的构筑及催化性能

本工作采用无皂乳液法合成出具有核壳结构的四氧化三铁@聚（苯乙烯-co-十八醇马来酸聚乙二醇双酯）（Fe3O4@P（St-co-OBEG））磁性聚合物复合微球,并以此为载体制备Ag/Fe3O4@P（St-co-OBEG）和Pt/Fe3O4@P（St-co-OBEG）两种复合催化剂。借助透射电镜和动态光散射表征复合催化剂的形貌和尺寸,并通过紫外可见吸光光度法测试它们的催化性能。实验结果表明两种复合催化剂对硝基苯和4-硝基苯酚的硝基加氢还原反应均具有良好的催化性能。相比Ag/Fe3O4@P（St-co-OBEG）,Pt/Fe3O4@P（St-co-OBEG）催化活性更高,这可能与Pt/Fe3O4@P（St-co-OBEG）催化剂中Pt纳米粒子本身的高催化活性和在磁性聚合物载体上较大的比表面积有关,还有可能归因于Pt纳米粒子在Fe3O4@P（St-co-OBEG）上的分布更均匀。国家自然科学基金(51573150;51673161);;福建科技重大研发平台项目(2014H2006)~

Ｒelationship between psychological flexibility and parental psychological flexibility in preschool children＇ s mother

目的:探讨学龄前儿童母亲的心理灵活性与养育心理灵活性的关系。方法:通过微信客户端招募北京市学龄前儿童(2~6岁)的母亲191名,采用接纳与行动问卷第二版(AAQ-II)测量心理灵活性、养育心理灵活性问卷(PPFQ)测量养育心理灵活性。结果:不同人口学特征学龄前儿童母亲的AAQ-Ⅱ和PPFQ得分差异均无统计学意义(均P&gt;0.05)。线性回归分析发现,母亲的心理灵活性对养育心理灵活性具有正向预测作用(&beta;=0.58,P&lt;0.001)。结论:本研究提示,学龄前儿童母亲的心理灵活性越高,其养育心理灵活性越高。</p

Some Problems About Securitization

证券化是一种新型的融资工具。与发行股票、债券以及担保贷款等传统型融资相比 ,证券化有着很大的不同。这种不同主要表现在证券化的多面性或复杂性上。正是证券化所具有的完全不同于传统型融资的多面性的特点 ,使它成为一种新型的整合融资。 Securitization is a new means of financing. It is quite different from such traditional means of financing as stock issue, bonds issue and loan against collateral. The difference is mainly expressed in the versatility or complexity of securitizition .It is the versatility which is quite different from the traditional financing means that makes the securitization become a new type of integrated financing

具有纳米结构插入层的GaN基LED

一种具有纳米结构插入层的GaN基LED，其中包括：一衬底；一纳米结构模板，该纳米结构模板外延生长在衬底上，该纳米结构模板的表面为凹凸形状；一插入层，该插入层外延生长在纳米结构模板的表面上；一N型欧姆接触层，该欧姆接触层外延生长在插入层上，该欧姆接触层上面的一侧形成有一台面；一有源层，该有源层外延生长在N型欧姆接触层的台面的另一侧上；一P型层，P型层外延生长在有源层上；一透明电极层，该透明电极层制作在P型层上；一P压焊电极，该压焊电极通过光刻制作在透明电极上；一N欧姆接触电极，该欧姆接触电极22制作在N型欧姆接触层的台面上

Preparation and Property of Asymmetric Polymer Nanospheres as Catalyst Supports and Photonic Crystal Building Blocks

采用无皂乳液聚合,以过硫酸钾(${{\rm{K}}_{\rm{2}}}{{\rm{S}}_{\rm{2}}}{{\rm{O}}_{\rm{8}}; }$)为引发剂、苯乙烯(St)为疏水单体、甲基丙烯酸缩水甘油酯(GMA)为亲水单体与亲/疏水性各异的交联剂进行反应,制备交联异形聚苯乙烯-聚甲基; 丙烯酸缩水甘油酯(PSt-PGMA)聚合物纳米球.利用扫描电镜、动态光散射、红外光谱、热重分析等手段对材料进行表征,探讨异形聚合物纳米球形貌的调; 控方法和形成机理.结果表明,交联剂的亲/疏水性是控制聚合物纳米球形态的关键因素.该聚合物纳米球可作为Au纳米粒子载体用于催化对硝基苯酚的还原反应; .同时,通过垂直沉积法诱导尺寸各异的交联异形PSt-PGMA聚合物纳米球自组装,可获得颜色从红到紫连续变化的光子晶体材料.Poly (styrene-co-divinylbenzene-co-polyglycidyl methacrylate); (PSt-PDVB-PGMA) polymer nanospheres with tunable morphologies have been; prepared through emulsion polymerization using potassium persulfate; (${{\rm{K}}_{\rm{2}}}{{\rm{S}}_{\rm{2}}}{{\rm{O}}_{\rm{8}}}$) as an; initiator,styrene (St) and glycidyl methacrylate (GMA) as monomers in; the presence of different crosslinking agents.Scanning electron; microscope (SEM),dynamic light scattering (DLS),thermogravimetric; analysis (TGA) and Fourier transform-infrared spectroscopy (FT-IR) were; used to characterize the morphology,size and composition of the polymer; nanospheres.The mechanism for the formation of asymmetric polymer; nanospheres and control over morphology were discussed in detail.It was; found that the hydrophilicity of the crosslinking agent significantly; affected the final morphology of the polymer nanospheres.The; PSt-PDVB-PGMA polymer nano-spheres can be used as supports for Au; nanocatalyst to catalyze the reduction of nitrophenol and self-assembly; building blocks to form photonic crystals.国家科技支撑计划项目; 福建省重大科技平台建设基金; 厦门市科技计划项目; 中央高校基本科研业务费专