一维链状铜配位聚合物[Cu(bpb)(PPh3)2]n·nClO4·nCH2Cl2·nH2O的合成、晶体结构与荧光性质研究

A coordination polymer of [Cu(bpb)(PPh₃)₂]_n·nClO₄·nCH₂Cl₂·nH₂O(bpb=1,4-bis(pyridine-3-aminome-thyl)benzene) has been synthesized and characterized by elemental analysis, IR, TG, PL and X-ray single crystal diffraction. The title complex crystallized in triclinic with space group P1, a=1.065 8(4) nm, b=1.542 4(6) nm, c=1.690 8(6) nm, α=80.11(10)°, β=76.00(10)°, γ=82.72(10)°, and V=2.646 5(17) nm³, Z=2, R=0.068 4. In the title complex, each Cu(Ⅰ) ion displays a distorted tetrahedron coordination configuration, defined by two N atoms from two different bpb groups, and two P atoms from PPh₃. Two adjacent Cu(Ⅰ) tetrahedron units are linked into a one-dimensional chain by the bpb ligands, which are further connected by hydrogen bonds to form a two-dimensional layer structure. Furthermore, the solid-state fluorescent property of the title complex was studied at room temperature. CCDC: 743417.     

The eddy current induced in the pulsed bump magnet for the CSNS/RCS injection

The injecton pulsed bending bump magnets of Rapid Cycling Synchrotron (RCS) in China Spallation Neutron Source (CSNS) consist of four horizontal bending (BH) magnets and four vertical bending (BV) magnets. The BH magnets are operated at a repetition rate of 25 Hz and are excited with a trapezoid rectangle waveform with about 1.6 milliseconds duration. The eddy current is induced in BH magnets and in the end plates it is expected to be large, so the heat generation is of our great concern. In this paper, the eddy current loss of the BH magnet has been investigated and calculated by using a coupling method of 3D electromagnetic and thermal analysis. The accuracy of the analysis is confirmed by testing the prototype BH magnet. The end plate temperature of the BH magnet provided with slit cuts has been decreased obviously and met the requirements.     

锐钛矿型二氧化钛纳米粉体的IR光谱与光催化性能研究

采用溶胶-凝胶法制备了TiO2光催化剂,研究了不同温度下焙烧TiO2粉体的XRD和FT-IR光谱。400℃焙烧后,相应有机物的红外吸收峰消失,随着焙烧温度的升高,粉体粒径变大,800-420cm-1之间的吸收峰逐渐锐化,700℃焙烧的FT-IR谱的423cm-1为金红石型TiO2的特征Ti-O键振动。500℃焙烧的锐钛矿型TiO2粉体对水杨酸具有较好的光催化活性。     

准立方体α-Fe_2O_3纳米薄膜的紫外和红外光谱研究

采用浸渍提拉法制备了准立方体α-Fe2O3纳米薄膜,利用XRD、AFM、UV-Vis和FT-IR对其表面形貌和谱学性质进行了表征。结果表明,α-Fe2O3单层膜是由粒径约为58nm的粒子排布而成,在568、482和386cm-1处有特征红外吸收峰,在紫外区375nm处存在明显的吸收,为Fe-O间的电子跃迁,其吸光度值与膜层数间的较好线性关系说明在一定的速度下挂膜,可以将氧化铁溶胶中的纳米粒子较好地转移到基片上。     

静电纺丝法制备La2CuO4纳米管阴极材料及其电化学性质研究

采用静电纺丝法制备了一维管状中温固体氧化物燃料电池(ITSOFC)阴极材料La₂CuO₄。利用XRD、TG-DTA、FT-IR和SEM对材料的结构和微观形貌进行分析。研究表明,700℃烧结2h得到平均直径150纳米、形貌均一的La₂CuO₄纳米管。900℃烧结0.5h得到纳米管间连接充分并与电解质紧密接触的纤维电极。利用交流阻抗技术对电极的性能进行研究发现,La₂CuO₄纳米管阴极材料具有比粉体材料更优越的电极性能。纳米管阴极在700℃的极化电阻为1.03Ω·cm²,而同一组成粉体电极的极化电阻为1.61Ω·cm²;氧分压测试结果显示纳米管电极反应的速率控制步骤为电荷转移过程。     

(Pr0.9La0.1)2(Ni0.74Cu0.21Ga0.05) O4+δ纳米纤维阴极的制备及电化学性质

采用静电纺丝法制备了（Pr_0.9La_0.1）₂（Ni_0.74Cu_0.21Ga_0.05）O_4+δ（PLNCG）氧化物纳米纤维。利用热重-差热分析（TG-DTA）、X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）和扫描电子显微镜（SEM）对材料的物相及微观形貌进行分析。研究表明950℃煅烧5 h得到平均直径420 nm、形貌均一的PLNCG氧化物纤维;1 000℃烧结2 h得到紧密附着在Ce_0.9Gd_0.1O_2-δ（CGO）电解质上的网状结构纤维阴极。电化学阻抗谱（EIS）测试结果表明纳米纤维阴极具有比粉体阴极更优越的性能。700℃的极化电阻（R_P）为0.134 Ω·cm²,比同组分的粉末阴极减少32%（R_P=0.197 Ω·cm²）。以纤维阴极构筑的电解质支撑单电池Ni-CGO/CGO/PLNCG在700℃的最大输出功率密度为231 mW·cm^-2。氧分压测试结果表明阴极反应的速率控制步骤为电荷转移过程。     

静电纺丝法制备La_2CuO_4纳米管阴极材料及其电化学性质研究

采用静电纺丝法制备了一维管状中温固体氧化物燃料电池(ITSOFC)阴极材料La2CuO4。利用XRD、TG-DTA、FT-IR和SEM对材料的结构和微观形貌进行分析。研究表明,700℃烧结2 h得到平均直径150纳米、形貌均一的La2CuO4纳米管。900℃烧结0.5 h得到纳米管间连接充分并与电解质紧密接触的纤维电极。利用交流阻抗技术对电极的性能进行研究发现,La2CuO4纳米管阴极材料具有比粉体材料更优越的电极性能。纳米管阴极在700℃的极化电阻为1.03Ω·cm2,而同一组成粉体电极的极化电阻为1.61Ω·cm2;氧分压测试结果显示纳米管电极反应的速率控制步骤为电荷转移过程。     

中温固体氧化物燃料电池阴极材料Nd2-xSrxCuO4的制备与性能研究

采用固相法合成了类钙钛矿结构的中温固体氧化物燃料电池(IT-SOFC)阴极材料Nd2-xSrxCuO4(简称NSC,x=0.0～0.1).通过XRD和SEM对材料进行了表征.结果表明该阴极材料与电解质Ce0.9Gd0.1O1.9(CGO)在1 000℃烧结4 h后不发生化学反应,具有良好的化学相容性;且烧结后二者之间能形成良好的接触界面.利用交流阻抗谱研究了电极的性能.发现随着Sr掺杂量的增加,极化电阻逐渐减小,其中Nd1.93Sr0.07CuO4在空气中的极化电阻最小,750℃时仅为0.14 Ω·cm2.700℃时,电极反应的速率控制步骤为电极上发生的电荷转移过程.     

量子尺寸ZnO的溶胶法制备及光学性质研究现状

量子尺寸氧化锌是重要的氧化物半导体材料之一，文中简单介绍了它的溶胶法制备及粒子生长和聚集过程，着重阐述了其光学性质研究现状和光致发光机理，并展望了未来的发展方向。     

一维链状铜配位聚合物[Cu(m-BDOA)(bipy)·H2O]n的合成与晶体结构

A novel coordination polymer, [Cu(m-BDOA)(bipy)·H₂O]_n (m-BDOA^2-=benzene-1,3-dioxyacetate), was synthesized and characterized by elemental analysis, IR spectra, X-ray single crystal structure analysis. Crystallographic data are as follows: orthorhombic, space group Pna2₁, a=1.606 9(3) nm, b=1.685 9(3) nm, c=0.699 7(1) nm, V=1.8955(7) nm³, Z=4, D_c=1.619 g·cm^-3, μ=1.200 mm^-1, F(000)=948，R=0.038 1, wR=0.038 6. The copper atom is five-coordinated involving two oxygen atoms of different m-BDOA^2- ligand, two nitrogen atoms of 2,2′-bipy ligand and one coordinated water, there is a distorted square pyramidal environment. Two copper atoms are bridged by m-BDOA^2- ligand, forming a one-dimensional chain along a axis. The adjacent distance of Cu…Cu atoms is 0.877 3nm. The crystal network was formed by the intermolecular hydrogen bond and π-packing interactions.