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缓冲盐类型和离子对试剂非对离子对强离解酸性化合物离子对反相液相色谱保留行为的影响
Se pu = Chinese journal of chromatography, 2021 在离子对反相液相色谱(IP-RPLC)分析中,溶质保留受对离子(counter ion)的影响比较受人关注,但鲜有研究流动相中缓冲盐类型和离子对试剂中非对离子(non-counter ion)对溶质保留行为的影响。鉴于此,该文以14种磺酸化合物为研究对象,甲醇为有机调节剂,分别考察了3种缓冲盐体系(磷酸二氢铵、氯化铵和乙酸铵)和5种离子对试剂体系(四丁基溴化铵、四丁基磷酸二氢铵、四丁基硫酸氢铵、四丁基硝酸铵和四丁基乙酸铵)下强离解酸性化合物的IP-RPLC保留行为 ...
Xiao-lan Liu +5 more
semanticscholar +1 more source
, 2020 SF6作为气体绝缘介质广泛应用于气体绝缘设备中, 其电弧等离子体得到广泛研究, 但对SF6电弧等离子体时间分辨光谱特性的研究还未见报道. 本文在SF6环境中利用飞秒激光自聚焦产生的光丝引导高压放电, 诱导产生SF6等离子体; 利用光谱系统采集300—820 nm波长范围内的SF6等离子体光谱, 对光谱谱线开展了识别和归属研究, S和F谱线主要分布在300—550 nm和600—800 nm波段, 分析认为S和F原子主要由SF6被高能电子碰撞直接或间接产生, S离子由S原子被高能电子撞击产生 ...
张云刚 +5 more
semanticscholar +1 more source
Rare Metals, EarlyView.ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi +8 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT With the rapid development of the energy storage industry, aqueous zinc‐ion batteries (AZIBs) have attracted considerable attention in the field of energy storage because of their inherent advantages, thereby emerging as a promising research direction with significant potential.
Lingjiao Fu +8 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Chlorination roasting has emerged as a promising pyrometallurgical strategy for the selective recovery of lithium from spent lithium‐ion batteries (LIBs). In this study, a natural roasting agent, seawater‐derived chlorides, was employed to selectively extract lithium from spent LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode. MgCl2·6H2O, a main component
Bei‐Lei Zhang +7 more
wiley +1 more source
, 2015 分子印迹技术(molecular imprinting technology,MIT)是指制备对特定目标分子具有专一识别性能的聚合物技术。离子印迹技术(ion imprinting technology,IIT)作为分子印迹技术的重要分支,因存在金属离子配位作用而具有很多优势,近年来得到了快速的发展。本文介绍了离子印迹技术原理、制备方法及其在金属的痕量和超痕量分析时的应用,并针对海洋环境监测中非常受关注的典型重金属污染离子(铅、汞、铜、镉、铬、砷)的主要研究进展进行了综述 ...
傅骏青 王晓艳 陈令新, 陈令新
core
Rare Metals, EarlyView.ABSTRACT Photodetectors, based on GaAs nanowires (NWs), hold significant promise in the fields of high integration micro‐ and nano‐optoelectronics applications because of their outstanding electronic and optical properties. To date, significant efforts have been directed toward enhancing the performance of photodetectors, aiming for high detectivity ...
Yu Hao +11 more
wiley +1 more source
Gaoya dianqi, 2021 采用脉冲电子注入式迁移管,对GIS中常见气体成分在低E/N值下的负离子迁移特性进行了研究,研究对象包括:O2、SO2、SOF2、SO2F2和SF6。在所研究E/N值范围内（0.264～1.168 Td）,结果表明:由于避免了传统离子门迁移管技术的电荷损失问题,离子电流信号强度大为提高;所研究气体对应的负离子迁移时间与迁移场强呈线性关系,迁移距离越长,迁移时间变化率越大。采用迁移距离和迁移时间差值法计算出的离子迁移速度,能有效消除离子起始加速阶段速度不稳定对稳定迁移速度的影响 ...
辛忠良 +4 more
doaj
I. Preparation of Au/TS-1 Catalysts by Ionic Liquid Enhanced Immobilization Method II. Gold Recovery from Aqueous Solution and Preparation of Au nanoflowers Based on Synergistic Action of Microorganism and Surfactant [PDF]
, 2015 1.考察了将离子液体分别引入沉积-沉淀法和生物还原法制备负载型金催化剂（Au/TS-1）的过程，并将所获催化剂用于H2、O2共存时的丙烯气相环氧化过程。沉积-沉淀法引入离子液体后，制备过程中离子液体的用量、体系的pH以及Au负载量均会影响所获催化剂的催化性能。离子液体的引入可以提高Au的有效负载量，并在一定程度上提高催化剂的催化性能，但Au负载量的提高是有限的，而且Au的有效利用率偏低。将离子液体引入生物还原法后，考察了制备过程中离子液体的种类、生物质的种类和生物质浓度的影响 ...
景孝廉
core
Rare Metals, EarlyView.ABSTRACT This study elucidates the oxidation mechanisms governing Y/Hf‐doped AlCoCrFeNiTi high‐entropy alloys (HEAs) and reveals the pivotal role of fabrication processes in dictating high‐temperature oxidation behavior. We demonstrate that casting and spark plasma sintering (SPS) promote Y/Hf segregation, resulting in heterogeneous oxide formation and
Huaqing Yi +5 more
wiley +1 more source