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砷化氢分离-砷钼蓝分光光度法测定铁矿石中砷的国家标准方法探析郑小敏1,周礼仙1,李弘1(1.四川省攀枝花市攀钢集团研究院有限公司检测中心)摘 要:对铁矿石砷含量测定的国家标准方法--砷化氢分离-砷钼蓝分光光度法的关键步骤和要点,如锌粒粒度,砷化氢气体导管插入吸收液深度,吸收管的干燥等进行探析.表明锌粒的粒度与砷化氢气体发生的反应时间有关,反应时间在40 min内应采用≤3 mm锌粒,反应时间在60 min时,采用45 mm锌粒对测定结果没有影响;砷化氢导管的插入深度和吸收管的干燥情况对测定结果有影响,砷化氢导管......
羧基化碳纳米管修饰碳糊电极伏安法测定痕量铝李俊华1,邝代治1,冯泳兰1,曾荣英1,屈景年1(1.湖南省衡阳市衡阳师范学院化学与材料科学学院功能金属有机材料湖南省普通高等学校重点实验室)摘 要:以羧基化多壁碳纳米管(c-MWCNT)修饰的碳糊电极为工作电极,建立了一种无汞测定痕量铝的新方法.在0.1 mol/L的HAc-NaAc电解液(pH5.2)中,铬蓝黑R(EBBR)在羧基化多壁碳纳米管修饰碳糊电极表面上进行阳极扫描时出现4个......
锐钛矿型TiO2纳米颗粒的水热法合成及其特性傅小明1,徐艳1,杨在志1,刘照文1(1.江苏省宿迁市宿迁学院三系)摘 要:以硫酸钛为钛源,浓氨水为沉淀剂,通过水热法水解合成TiO2.利用XRD,SEM和TEM对试样进行分析,结果表明:当硫酸钛溶液水解时不加入浓氨水,随着水解时间的延长,获得的锐钛矿型TiO2颗粒的粒径没有明显的变化;当硫酸钛溶液水解时加入浓氨水,合成锐钛矿型TiO2颗粒的粒径明显变小,在240℃,48.0h和pH=9.0条件下水热法合成了方形或者近椭圆形的TiO2,分散性较好,其颗粒粒径约为20n......
Blue upconversion of Tm3+ using Yb3+ as energy transfer bridge under 1532 nm excitation in Er3+, Yb3+, Tm3+ tri-doped CaMoO4李心悦1,周少帅1,姜桂铖2,韦先涛1,陈永虎1,尹民11. Department of Physics University of Science...+, Yb3+ and Tm3+ ions were successfully synthesized by sol-gel method. Intense blue emission from Tm3+ ions was observed upon excitation of 1532 nm infrared light in Er-Yb-Tm system, while this blue......
Blue upconversion of Tm3+ using Yb3+ as energy transfer bridge under 1532 nm excitation in Er3+, Yb3+, Tm3+ tri-doped CaMoO4李心悦1,周少帅1,姜桂铖2,韦先涛1,陈永虎1,尹民11. Department of Physics University of Science...+, Yb3+ and Tm3+ ions were successfully synthesized by sol-gel method. Intense blue emission from Tm3+ ions was observed upon excitation of 1532 nm infrared light in Er-Yb-Tm system, while this blue......
of the samples for the degradation methylene blue was studied under UV and visible light irradiation.The effects of constituents on the properties of the CeO2-based catalysts were investigated by XRD,TEM,BET,and UV-Vis spectrophotometer.The highest degradation of methylene blue under 230W UV light was almost 100% at 50 min by La2O3/Fe2O3-CeO2/γ-Al2O3 catalyst and 99.42% at 50 min......
technique. The photocatalytic activity of catalysts was evaluated by the photodegradation of methylene blue under visible light irradiation. Analytical results demonstrated that Nd doping inhibited the growth... edges of SNT photocatalysts shifted to longer wavelength compared with the undoped Ti O2. Such SNT with Nd dosage of 0.25 at.% exhibited the highest photocatalytic activity in the degradation of methylene......
technique. The photocatalytic activity of catalysts was evaluated by the photodegradation of methylene blue under visible light irradiation. Analytical results demonstrated that Nd doping inhibited the growth... edges of SNT photocatalysts shifted to longer wavelength compared with the undoped Ti O2. Such SNT with Nd dosage of 0.25 at.% exhibited the highest photocatalytic activity in the degradation of methylene......
PDP用蓝色荧光粉的研究进展 薛丽红1,游艳1,李元元1,严有为1,姚山山1 (1.华中科技大学模具技术国家重点实验室,武汉,430074) 摘要:综述了近年来等离子体平板显示器(PDP)用蓝色荧光粉的研究进展,介绍了PDP蓝色荧光粉的种类和制备方法,分析了现有PDP蓝色荧光粉存在的问题和不足,并展望了PDP蓝色荧光粉未来的发展趋势. 关键词:等离子显示器(PDP); 蓝色荧光粉; 制备; plasma display panel(PDP); blue phosphors; synthesis; [全文内容正在添加中] ......
; ruthenium; kinetic spectrophotometry; acid chrome blue K; potassium bromate; [全文内容正在添加中] ......
