Synergistic Extraction of Rare Earth Ions by 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone and Trioctylphousphine Oxide in Paraffin Wax

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Plasma Induced Degradation of Benzidine in Aqueous Solution

The degradation of benzidine in aqueous solution by the low temperature plasma was examined. The results showed that the concentration of medium and the value of pH have an appreciable effect on the degradation of benzidine. What is more important is that iron ions acting as a catalyst play an important role in this reaction. For exploring the degradation mechanism of benzidine, some of the intermediate products were recorded by HPLC (high performance liquid chromatography).     

Degradation of Anionic Dye Eosin by Glow Discharge Electrolysis Plasma

This paper describes a novel method for the degradation of eosin by using glow discharge electrolysis （GDE）. The effects of various parameters on the removal efficiency were studied. It was found that the eosin degradation could be raised considerably by increasing the applied voltage and the initial concentration, or by decreasing pH of the aqueous solution. Fe^2＋ ion had an evident accelerating effect on the eosin degradation. The degradation process of eosin obeyed a pseudo-first-order reaction. The relationship between the degradation rate constant k and the reaction temperature T could be expressed by Arrhenius equation with which the apparent activation energy Ea of 14.110 kJ· mol^-1 and the pre-exponential factor k0 of 2.065× 10^-1 min^-1 were obtained, too. The determination of hydroxyl radical was carried out by using N, N-dimethyl -p-nitrosoaniline （RNO） as a scavenger. The results showed that the hydroxyl radical plays an important role in the degradation process.     

利用Sol-Gel法与水热合成法制备纳米TiO2及其光催化活性研究

以Sol-Gel法及水热合成方法制备了纳米TiO2,利用XRD进行了表征,以太阳光为光源,通过对亚甲基蓝溶液的降解反应,考察了两种方法所得样品的光催化活性。结果表明,利用水热合成法制备的锐钛矿型TiO2具有更小的粒径,而通过溶胶-凝胶制得的样品为混晶型TiO2,对亚甲基蓝降解具有较高的光催化活性。     

纳米二氧化钛薄膜协同接触辉光放电技术降解亚甲基蓝

通过溶胶-凝胶法制得纳米TiO_2薄膜,研究了日光条件下亚甲基蓝在薄膜上的光催化降解以及在TiO_2协同接触辉光放电条件下的降解,结果表明:镀膜5次所得薄膜具有高的催化性能;TiO_2协同接触辉光放电可以高效地降解亚甲基蓝分子;所制得的薄膜随使用次数的增加而活性变化不大。     

新穴类大环配体——双环-N,N′,N″-三-(1,4-苯基)-二-氨三乙酰胺和双环-N,N′,N″-三-(1,2-苯基)-二-氨三乙酰胺的合成与表征

首次用二步合成法合成了大环螯合剂ＬＨ６,合环反应不需要高稀释技术,用这种方法合成六酰胺螯合剂达到了预期的目标。此法也可以用来进行对称和不对称大环分子的合成。     

镧系金属硝酸盐与聚乙二醇配合物的合成及其性质的研究

本文拟以PEG-400(约为9个EO即EO_9)作为配体,研究其与镧系离子的反应,并合成了组成为(Ln=Pr、Nd、Sm、Eu,Gd、Tb、Dy、Ho、Er、Tm)Ln_2(EO_9)(NO_3)_6固体配合物,求得了配合物的稳定常数和合成产率,红外光谱反映出在400cm~(-2)～1600cm~(-1)范围内配体与配合物的谱峰变化,考察了这类配合物的热谱,比较了X—射线粉末衍射及元素分析数据。     

Spectrophotometric Determination of Trace Amounts of Vanadium(Ⅴ) by Means of Its Catalytic Effect on Oxidation of Azomethine-H by Bromate

1ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｂｉｏｌｏｇｉｃａｌｅｆｆｅｃｔｓｏｆｖａｎａｄｉｕｍｉｎｖｏｌｖｅｎｏｒｍａｌｉｚａｔｉｏｎｏｆｓｕｇａｒｌｅｖｅｌｓ,ｐａｒｔｉｃｕｌａｒｌｙｉｎｖａｒｉｏｕｓｅｎｚｙｍｅｓｙｓｔｅｍｓａｓａｎｉｎｈｉｂｉｔｏｒａｎｄ/ｏｒａｃｏｆａｃｔｏｒ[1].Ｖａｎａｄｉｕｍｉｓａｌｓｏａｎｅｓｓｅｎｔｉａｌｍｉｃｒｏａｍｏｕｎｔｅｌｅｍｅｎｔｆｏｒｈｕｍａｎａｎｄａｎｉｍａｌｓ,ａｎｄｉｔｓｐｒｅｓｅｎｃｅｉｎｔｈｅｒａｎｇｅ20～150ｎｇ/ｍｌｉｎｄｒｉｎｋｉｎｇｗａｔｅｒｈａ…     

钇—8-羟基喹啉—表面活性剂三元体系中的荧光反应

荧光光度法测定钐,铕和铽已有报道,但对钇的报导尚不多见。 本文较为系统地研究了钇—8—羟基喹啉(QX)溴化十六烷基三甲基铵(CTMAB)三元体系中的荧光反应,并拟定了可供实用的测定方法。 一、主要试剂与仪器 实验中配制标准溶液用的Y_2O_3纯度为99.99％,以盐酸溶解之,其余试剂均为分析纯。 测量仪器为日立MPF-4型荧光分光光度计及pHS-2型酸度计。