用亚铁氰化钛钾从模拟高放废液中吸附Cs研究

本文研究了溶胶-凝胶法合成的无机离子交换剂亚铁氰化钛钾的耐酸性和辐照稳定性等性能，测定了从模拟酸性高放废液中主要常量组分离子相对于Cs的分离系数，研究了流速对Cs吸附曲线的影响。实验结果表明，该交换剂具有良好的辐照稳定性，交换剂经2×106Gy的辐照，亚铁氰化钛钾对Cs的表观交换容量下降6～7％，为0．873mmolCs／g干交换剂。在0．5～1．5mol／LHNO3中具有良好的化学稳定性。在模拟酸性高放废液中对几种离子的选择吸附顺序为：Cs＞＞M＞Fe＞Sr＞Na＞Cr＞Nd，Mn，该交换剂具有较高的吸附容量，对Cs具有良好的选择性，有希望用作从酸性高放废液中去除Cs的材料。     

3—磺基—4—羟基香豆素希土化合物的合成及性质

在不同条件下制得三种类型的希土与3-磺基-4-羟基香豆素(H_2SHC)化合物,元素分析确定了它们的组成分别为Ln(HSHC)_3·9H_2(Ln=La,Pr,Nd,Gd,Dy,Er,Yb,Y),Ln_2(SHC)_3.nH_2O(Ln:La,Pr,Nd,Sm,Gd,N:4或6)和Na,Ln(3HC),·H:O(Ln:Er,Yb).并通过它们的摩尔电导戌\重,溶解度,红外光谱和电子吸收光谱对各种化合物进行了结构和性质的研究。     

Fabrication of hexaphenylsilole nanowires and their morphology-tunable photoluminescence.

Immersion of nanoporous alumina membranes into saturated solutions of hexaphenylsilole with subsequent solvent evaporation affords aligned organic nanowires. The luminescent properties of the hexaphenylsilole nanowires can be manipulated by varying their morphologies, which were controlled by changing the channel sizes of the alumina templates.     

甲烷部分氧化制合成气 Ⅰ．甲烷在过渡金属上的活化

文中用同位素交换（Ｄ_２─ＣＨ_４）反应来测量四种过渡金属负载型催化剂对甲烷的活化能力，并与Ｓｖｅｎｓｓｏｎ等从头算的计算结果作了比较，表明最有效活化甲烷分子的Ｃ─Ｈ键的金属是铑（Ｒｈ）．文中还测定了在甲烷部分氧化制合成气反应中，四个不同催化剂的催化活性与选择性，并与它们对甲烷的活化能力进行对比，可以看出甲烷部分氧化反应中，反应活性高的催化剂有效地活化甲烷，断裂Ｃ─Ｈ键，而且氘代甲烷产物分布以形成ＣＤ_４产物为主要成份．     

甲醇与乙醇一步合成异丁醛用CuO-ZnO/Al2O3催化剂

在ＣｕＯ－ＺｎＯ／Ａｌ２Ｏ３催化剂上，甲醇与乙醇在常压和２１０￣３６０℃温度下一步反应合成异丁醛。利用正交设计方法，研究了ＣｕＯ－ＺｎＯ／Ａｌ２Ｏ３体系催化剂组成和制备条件等因素对催化剂催化性能的影响。结果表明，催化剂中ＣｕＯ含量对催化剂的催化活性影响最大，而ＺｎＯ含量则主要影响催化剂对异丁醛的选择性。催化剂制备条件，如沉淀温度、陈化时间等，也不同程度也影响催化剂的催化性能。ＸＲＤ和ＢＥＴ表征结果     

Investigation of shifts and interaction of signals in high-contrast transmission spectroscopy

In the recently introduced high-contrast transmission version of saturated absorption laser spectroscopy, narrow signals are obtained from dense atomic samples subject to strong pumping. A study of possible systematic shifts of the signals in this domain of rather extreme experimental conditions was performed in order to assess the validity of spectroscopic data obtained with this technique. Certain signal components were found to be slightly shifted while others were not. Further, a theoretical study of the behaviour of overlapping signals in the high-contrast regime is presented. In particular, the question of whether structures buried under the natural linewidth could be resolved is addressed.     

光谱复杂的稀土基体中稀土杂质ICP光谱测定的一些问题

ICP激发光源以其独特的功能使ICP/AES技术在稀土分析中的应用日益广泛,在一定程度上取代了经典的直流电弧光谱法,但应指出,由于常规雾化器的低雾化效率(≤5％)和试样的高倍稀释,ICP/AES技术的实际检测能力的改善并不明显,本文用ICP光谱法测定了     

Voltammetric sizing of a sphere.

The size of a glass sphere positioned in the center of a microdisk electrode is determined by using a simple electrochemical procedure and is confirmed, additionally, by a microscopical measurement of the sphere at the time of the electrochemical measurement. The cyclic voltammetric response of the naked electrode and of the electrode with the sphere positioned in its center is recorded over a wide range of scan rates (0.002-1.5 V s(-1)). The size of the sphere is then determined by comparison of the experimental voltammogram with simulations for each individual scan rate.