无机膜在液相反应和分离中的应用

无机膜在现代化工中的应用已越来越广泛.本文对无机膜的发展与特点,以及无机膜在液相分离和反应领域中的应用进行了综述.     

学生能力结构与无机化学实验教学

针对大一新生知识储备量少、实验技能薄弱的特点,就强调无机化学实验课的重要性、合理安排实验内容、突出教师的主导作用、强化学生的主体地位几个方面探讨了如何使无机化学实验教学与学生能力结构相适应,以培养学生的综合能力。     

无机化学实验技能多元化评价的实践与探索

无机化学实验考核是对教师的教学质量和学生的学习质量两方面的检查和评定,是提高实验教学质量的有效措施。实验成绩的考核包括平时考核(40%)、过程考核成绩(30%)和期末考核试(30%)三部分。实践证明,这种考核方式不仅大大调动学生做实验的主动性和积极性,有效地提高学生综合能力,对于培养复合型人才具有重要的意义,同时也促进教师实验教学水平的提高。     

濒危植物翅果油树根际土壤磷的有效性研究

本文采用酸溶－钼锑抗比色法、张守敬－Jackson分级测定法、灼烧－0.2N H2SO4浸提法、0.03N NH4F-0.025N HCl浸提－钼锑抗比色法、以及电位法对翅果油树（DElaeagnus.mol-lis）根际土与非根际土的全磷、无机磷、有机磷、有效磷及土壤pH值等进行测定与分析。结果表明，在翅果油树土壤中全磷浓度在根与非根际相近，有效磷和无机磷在根际略高于非根际，有机磷在根际略低于非根际，但均无明显差异，比较无机磷各组分与土壤有效磷的相关性发现：无论在根际还是在非根际，其相关系数均未达到显著水平，除Fe-P外，其余各组分都表现出根际略大于根际的趋势，翅果油树土壤pH表现为根际略小于非根际，而且均呈弱碱性，这与其土壤Ca-P含量高相一致。     

研究型无机化学实验教学模式探索

为适应社会经济发展对高素质应用型化学人才的需要,结合学生的具体情况和本实验课程的特点,在无机化学实验教学中实施“引入问题培养学生的学习兴趣、培养学生的基本实验技能、培养学生的科研实验技能、培养学生分析实验结果能力、实验教学内容以研究型实验为主、考试以研究型实验内容为主、研究型无机化学实验课题与学生科研立项相结合”七项举措,对“科学研究依托无机化学实验教学-无机化学实验教学支持科学研究-科学研究反哺无机化学实验教学”这一研究型无机化学实验教学模式进行了探索.     

Gas-Solution Interface Technique as a simple method to produce inorganic microtubes with scroll morphology

Over the past decade, numerous studies have dealt with new properties of inorganic nanomaterials with improved characteristics due to a particular morphology, and new facile methods to produce such materials have been reported. Inorganic microtubes can be designed for multifunctional materials with highly specific surface area. These microtubes can act as individual on-chip components of miniature devices or off-chip micromachines. The paper first discusses the main regularities of the reactions at the gas-solution interface and then goes on to present the basic principles of the Gas-Solution Interface Technique(GSIT), thus demonstrating a new way of facile synthesis of inorganic rolled-up microtubes. A distinctive feature of the technique is the formation of a gradient solid layer on the surface of the aqueous solution as a result of the gaseous and liquid reagents interaction. When dried in the air, this thin layer is capable of self-folding into microtubes with specific morphology. The paper considers the specific features of microtubes obtained by GSIT from numerous classes of inorganic compounds, including oxides, hydroxides, sulfides, fluorides. Further areas of possible practical applications of GSIT microtubes are discussed. The prospects of future development of the GSIT are outlined.     

Laser-induced self-organization in Se–Te–Sn–Cd glassy semiconductor for developing novel light-sensing dielectrics

The laser-induced effects on dielectric properties of chalcogenide glass(Ch Gs) have been present in a glassy system of Se–Te–Sn–Cd for possible applications in optics and optoelectronics such as light-controlled capacitance-based touch displays. The temperature/frequency dependence of dielectric relaxation before and after laser exposure was investigated by using laser sources of different wavelengths(405 nm, 532 nm, 690 nm, and 785 nm). The result showed the presence of laser-induced residual effects on dielectric properties(dielectric constant/loss and a.c. conductivity) after the exposure of continuous-wave laser sources of chosen wavelengths.Further analysis indicates that the modification in the meta-stable state due to self-organization is the feasible mechanism of observed persistent light-sensing effects.     

膨胀型无机防火涂料的研制

以水玻璃为成膜剂。以氢氧化铝、高岭土和硼砂等为填料．再掺入一些助剂,制得膨胀型无机防火涂料。可适用于木结构、砖结构和纸结构的防火阻燃。     

无机高分子复合絮凝剂的制备及絮凝性能研究

制备无机高分子絮凝剂＿硅钙复合型聚合氯化铝镁锌(SCPAMZC),考察了不同pH值条件下水玻璃的胶凝时间,SiO2/Al(硅铝比),Mg/Zn,Ca/Zn,Ca Mg Zn/SiO2等因素对其絮凝性能的影响,确定了最佳制备条件为pH值2～4,SiO2/Al为1/0.7左右,Mg/Zn和Ca/Zn分别为1,Ca Mg Zn/SiO2为0.3。经应用实验表明:SCPAMZC用于印染废水和生活污水处理,具有优异的絮凝性能。     

Fabrication of flexible α-MnO_2 nanowire membranes with superior mechanical strength

The Assembly of one-dimensional （1D） nano- structures such as nanowires/nanorods/nanotubes into two- dimensional （2D） macrostructured films is attracting considerable research interest because of their unique properties and wide applications. In this study, flexible membranes were successfully fabricated using α-MnO2 nanowires synthesized through a hydrothermal method. The effects of thickness and post-annealing temperature on the mechanical properties of the membranes were investigated in detail. Nano-indentation measurements showed that the modulus of the as-prepared 11.75 μm-thick membrane reached 5.765 GPa, and the modulus increased with the increasing post-annealing temperature. Thus, the fabricated membranes with superior mechanical strength can have potential applications such as in photocatalysis, filtering, and supporting substrates.