氯化钡生产工艺的研究

论述了氯化钡的两种主要生产工艺,对反应、除杂及分离、浓缩及结晶等工序作了深入的研究,并对影响产品收率、质量等有关的主要因素作了进一步的探讨,同时提供了浓缩结晶的新方法,另外也对生产过程中的劳动保护和环境保护提出了参考意见。     

FLOW - Injection Determination of Traces of Sulfide by the Brilliant Green - Sulfide Reaction with Spectrophotometry Detection

Abstract

A flow injection system is proposed for the rapid and sensitive determination of trace amounts of sulfide based on the addition reaction of sulfide with Brilliant Green at pH 7 and 25 C°. The effect of important parameters, such as reagent concentration, pH, reagent flow rate, sample volume, temperature and length of the reaction coil are reported. Sulfide in the range of 40 - 2000 ng·ml^?1 can be determined at a rate of 40 ± 5 samples per hour. The limit of detection was obtained as 2.0 ng of sulfide. The relative standard deviation for the determination of 100 ng·ml^?1 of sulfide is 0.8%. A system is proposed for elimination of potential interferences. The method was applied to the determination of sulfide in synthetic samples and in spring water.     

A general and selective zinc-catalyzed oxidation of sulfides to sulfoxides

A general zinc-catalyzed oxidation of sulfides to sulfoxides has been developed. All the reactions proceeded at room temperature. Hydrogen peroxide was used as a green oxidant. Twenty-one examples of sulfoxides were prepared in moderate to excellent yields.     

硫化物中微量金的X射线能谱分析

介绍了一种用加热去硫来制备硫化物能谱试样的方法;将黄铁矿在400-500℃下加热3-10min制备成X射线能谱试样,可以保持试样的原始结构,提高硫化物中包体金的X射线能谱峰背比,了解矿物之间的共生关系;并对黄铁矿中微量的包体金作了X射线能谱半定量分析;该法简便、有效。     

自组装硫化铜微米管的制备及可见光催化性能

以二水合氯化铜为铜源,硫代乙酰胺为硫源,通过共沉淀法成功合成了自组装CuS微米管,该合成方法简单、反应条件温和,是合成纳米材料的一种有效方法。通过扫描电子显微镜（SEM）考察反应时间对产物形貌的影响,并初步研究其形成过程。X射线衍射（XRD）表征产物是CuS。通过改变光催化实验的条件,如催化剂的量、溶液pH值、活性橙的浓度,研究了样品在可见光下对活性橙的光催化性能。     

过渡金属Co2+离子掺杂ZnS硫化物纳米晶制备与中红外发光特性研究

利用不含有机相的简单水热法制备了Co^2+∶ZnS纳米晶,纳米晶具有立方闪锌矿结构,平均晶粒尺寸约为8.3 nm,在808 nm激光泵浦下具有2~5μm波段的中红外荧光发射,中心波长位于3400 nm和4700 nm,分别对应Co^2+离子的4T2(F)→4 A 1(F)和4T1(F)→4T2(F)的能级跃迁.进一步将制备的纳米晶在还原气氛下进行800℃热处理,获得立方闪锌矿和纤锌矿混合晶型的纳米晶,平均晶粒尺寸增大到22.5 nm左右,热处理后的纳米晶表面羟基含量更低,中红外荧光发射强度显著提高.该Co^2+∶ZnS纳米晶的制备方法简单、在制备过程中不引入有机相等荧光淬灭中心,同时证明通过后热处理过程可以进一步减少表面缺陷及羟基含量,使荧光强度得到大幅提升.     

Toward Practical All-solid-state Batteries with Sulfide Electrolyte: A Review

Sulfide-based solid-state electrolytes with ultrahigh lithium ion conductivities have been considered as the most promising electrolyte system to enable practical all-solid-state batteries. However, the practical applications of the sulfide-based all-solid-state batteries are hindered by severe interfacial issues as well as large-scale material preparation and battery fabrication problems. Liquid-involved interfacial treatments and preparation processes compatible with current battery manufacturing capable of improving electrode/electrolyte interface contacts and realizing the mass production of sulfide electrolytes and the scalable fabrication of sulfide-based battery component have attracted considerable attention. In this perspective, the current advances in liquid-involved treatments and processes in sulfide-based all-solid-state batteries are summarized. Then relative chemical mechanisms and existing challenges are included. Finally, future guidance is also proposed for sulfide-based batteries. Focusing on the sulfide-based all-solid-state batteries, we aim at providing a fresh insight on understandings towards liquid-involved processes and promoting the development of all-solid-state batteries with higher energy density and better safety.     

Electrolytic partial fluorination of organic compounds: 89: Regioselective anodic fluorination of tetrazolyl sulfides

Anodic fluorination of five-membered nitrogen-containing heterocyclic sulfides like tetrazolyl sulfides was comparatively studied. The anodic fluorination of tetrazolyl sulfides having α-electron-withdrawing groups was successfully carried out to provide α-monofluorinated tetrazolyl derivatives in moderate yields. This is in sharp contrast to the low efficient anodic fluorination of triazolyl sulfides. Thus, it was found that the efficiency of anodic fluorination is greatly affected by the basicity of the heterocyclic groups of the starting heterocyclic sulfides.     

Ag－phen－TPPS_4体系光度法间接测定硫离子的研究－（Ⅱ）

本文报道了Ａｇ—ｐｈｅｎ─ＴＰＰＳ４光度法间接测定硫离子的新方法。疏离子的测定范围为０～０．１４μｇ／ｍＬ，摩尔吸光系数ε４３８＝５．２×１０５Ｌ·ｍｏｌ－ｌ·ｃｍ－１。用吹气法分离环境样品中的硫离子，以三乙醇胺的氢氧化钠溶液作吸收液，测定结果与亚甲基蓝标准法一致。     

Nucleophilic aromatic substitution reaction of nitroarenes with alkyl- or arylthio groups in dimethyl sulfoxide by means of cesium carbonate

Treatment of nitroarenes having electron-withdrawing groups at the ortho or para position with alkanethiol in the presence of cesium carbonate in dimethyl sulfoxide at 25 °C leads to nucleophilic displacement of the nitro group with the alkylthio group. Cesium carbonate is superior to other bases such as potassium carbonate, sodium carbonate, and triethylamine. The cesium-mediated nucleophilic aromatic substitution reaction provides a mild yet powerful and user-friendly protocol for the synthesis of aryl sulfides.