Cu2O颗粒的制备及其吸附性能

通过液相还原法制备了Cu2O颗粒，利用扫描电子显微镜（SEM）以及X射线衍射（XRD）等手段对粒径的大小、微结构以及组分进行了测试和分析。测试结果表明：Cu2O颗粒为组分单一、表面含有大量孔隙的八面体结构。颗粒的粒径大小并不均匀，分布在几十纳米到1微米之间。同时研究了Cu2O颗粒的吸附特性，发现Cu2O颗粒对甲基橙具有良好的吸附能力。在吸附160min后，甲基橙的吸附率为67．5％，而且其最高吸附率可达94．86％。Cu2O颗粒的吸附性能可能主要来源于颗粒上的孔隙结构。拟合结果表明Cu2O颗粒的吸附过程符合伪一级动力学方程，这说明Cu2O颗粒的吸附机制主要是物理吸附。

Fabrication of Cu_2O@Cu_2O core-shell nanoparticles and conversion to Cu_2O@Cu core-shell nanoparticles in solution

Cu2O@Cu2O core-shell nanoparticles (NPs) were prepared by using solution phase strategy. It was found that Cu2O@Cu2O NPs were easily converted to Cu2O@Cu NPs with the help of polyvinylpyrrolidine (PVP) and excessive ascorbic acid (AA) in air at room temperature, which was an interesting phenomenon. The features of the two kinds of NPs were characterized by XRD, TEM and extinction spectra. Cu2O@Cu NPs with different shell thicknesses showed wide tunable optical properties for the localized surface plasmon (LSP) in metallic Cu. But Cu2O@Cu2O NPs did not indicate this feature. FTIR results reveal that Cu+ ions on the surface of Cu2O shell coordinate with N and O atoms in PVP and are further reduced to metallic Cu by excessive AA and then form a nucleation site on the surface of Cu2O nanocrystalline. PVP binds onto different sites to proceed with the reduction utill all the Cu sources in Cu2O shell are completely assumed.

SCR法生产电工用铜杆的组织转变过程研究

采用金相显微镜、扫描电镜和拉伸试验机分析并研究了SCR4500生产线上铜杆的组织和性能转变。结果表明,铜杆经过多道次的轧制变形,组织发生明显变化。铜杆的晶粒尺寸随着轧制过程的进行,发生了明显的细化,晶粒尺寸达到20μm;SEM组织观察和拉伸断口分析表明,铜杆中存在Cu2O颗粒,对铜杆的性能产生不利的影响。

Cu2O/ZnO全氧化物薄膜的光电化学性能

本文利用SEM、XRD等多种表征手段证实了一维纳米复合半导体的形成,分析其形貌和结构。以P3HT/Cu2O/ZnO一维纳米复合半导体作为光电极组装全固态氧化物纳米结构太阳电池,研究了Cu2O厚度对组装电池光伏性能、光电性能和光电极光吸收性能的影响。结果表明,组装成的简易全固态氧化物太阳能电池最高可获得0.039%的光电转换效率。

空芯纳米氧化亚铜颗粒的制备及其光学性质

采用微波辐照法,以葡萄糖为还原剂还原Cu2+离子,制备出空芯纳米氧化亚铜颗粒,并研究了表面活性剂六次甲基四胺对颗粒形貌的影响.制得的样品利用X射线衍射仪(XRD)、扫描电镜(SEM)及紫外分光光度计(UV-vis)进行表征.结果表明,用微波辐照法制备的氧化亚铜颗粒具有空芯球状结构;随着表面活性剂浓度的减少,构成空芯球的纳米颗粒由球状过渡为片状,且粒径逐渐增大.氧化亚铜颗粒属于立方晶型,其吸收峰出现在430 nm附近,对应的禁带宽度约为2.58 eV,尺寸效应导致了明显的蓝移现象.