EDTA滴定法测定铟锡氧化物废靶粉中铟的含量

建立用EDTA滴定法测定铟锡氧化物(ITO)废靶粉中铟含量的方法。ITO废靶粉样品经盐酸和硝酸分解,用氢溴酸加热除锡,以冰乙酸做掩蔽剂,p H控制在2.5~3.0之间,在70~80℃下用EDTA直接滴定法测定铟的含量。该方法改进了除锡条件,优化了酸度、温度,讨论了络合掩蔽剂及其用量的选择过程。在最佳实验条件下,铟的回收率为99.4%~100.5%,测定结果的相对标准偏差小于1%(n=6)。该方法可以满足ITO靶材中常量铟的分析要求。     

废工业催化剂的回收

本文介绍了废工业催化剂回收的意义、现状、常用回收方法以及一般步骤。全社会都应该关注废催化剂的回收利用问题。     

离子交换法从废银液中回收硝酸银的研究

本文介绍了利用离子交换法从含银废液中以硝酸银形式回收银的方法。     

氯吡脲生产工艺中废苯的回收利用研究

本文对1-(2-氯-4-吡啶基)-3-苯基脲(氯吡脲/CPPU)生产中产生的废苯进行了回收处理研究,考察和优化了处理条件,确定了处理回收废苯的工艺路线:先把0.05mol/L硫酸溶液和废苯按1:20的比例,催化剂二月桂酸二丁基锡与废苯按1:2000的比例,一起回流1.5h;再蒸馏取80℃馏分,经气相色谱检测苯的纯度为99.99%,达到了回用于生产的要求。本研究既有经济效益又有环保意义。     

"纤维混纺比分析"实验废硫酸的回收处理与利用

本文将学生实验后留下的质量分数约为70％的废硫酸液回收,测定其基本性质后,进行处理,试验证明加水稀释是净化处理的最好方法。稀释后杂质发生絮凝,经沉降、过滤、浓缩,再用于同样的实验并进行对照,与新配的硫酸实验效果基本一致,可以重新利用。     

醋酸铟化合物的合成及热稳定性研究

合成了３个新的醋酸铟化合物；Ｅｔ２ＩｎＯＡｃ，ＥｔＩｎ（ＯＡｃ）２，Ｉｎ（ＯＡｃ）３，并经元素分析，ＩＲ及ＭＳ鉴定，讨论了二乙基醋酸铟化合物受热引起的歧化反应和这些化合物的热稳定性。．     

塞曼火焰原子吸收光谱法直接测定金属铟及铟合金中微量铅

对于纯铟及铟合金中微量铅的测定,通常采用在氢溴酸介质中,用甲基异丁基酮萃取,分离主体铟及其他干扰元素,水相于塞曼火焰原子吸收光谱仪波长283.3nm处测定铅的吸光度。方法操作流程长,经过两次萃取,易引入误差,不适合大批量的检测,而且所用的有机试剂易污染环境。鉴于以上弊端,本文介绍了利用塞曼火焰原子吸收光谱仪灵敏度高,选择性好,扣背景能力强等特点,在不用分离主体铟的情况下于5%(体积分数)盐酸介质中直接测定微量铅的方法。本法操作简单、迅速,且稳定性好,结果准确可靠,提高了分析速度。1　试验部分1.1　仪器与试剂GGX 6A塞曼…     

基于示差脉冲伏安法检测高纯铟电解液中铟离子

采用恒电位沉积法在玻碳电极上制备原位铋膜电极,利用循环伏安法、电化学交流阻抗探究玻碳电极和原位铋膜电极表面的电化学行为。对缓冲液pH、铋离子浓度、富集时间及电位等实验条件进行优化,利用示差脉冲伏安法实现高纯铟电解液中铟离子（In3+）的检测,In3+的溶出峰电流值和其浓度在0.6～2 mg/L范围呈线性关系,线性方程为c=0.061I+0.093,相关系数（R2）为0.998。在NaCl和明胶存在下,该方法仍能够有效地检测高纯铟电解液中In3+浓度。     

锌精矿中铟的测定

应用电感耦合等离子体发射光谱法测定锌精矿中的铟,确定了最佳工作条件,选择了最佳分析谱线,并利用标准加入法和基体匹配法确定了该方法的准确性。样品用氟化氢铵、盐酸、硝酸、高氯酸溶样,用盐酸浸取。本法与萃取分离盐酸羟胺示波极谱法测定的铟含量结果一致。方法准确,快速,加标回收率为99.6%~101.7%,相对标准偏差为0.97%~2.1%。     

铟锡氧化物(ITO)纳米颗粒的制备及表征

以金属In和SnCl₄·5H₂O为主要原料，加入保护剂PVP，利用化学共沉淀法合成了球形的铟锡氧化物(ITO)纳米颗粒。分别对PVP的用量、溶液的pH值、热处理温度等因素对ITO纳米颗粒粒径的影响进行了分析。并且借助透射电镜(TEM)、X射线衍射(XRD)对所合成的ITO纳米颗粒进行了表征。XRD分析说明本文合成了金刚砂型结构的铟锡氧化物纳米颗粒，并且其晶型结构随着热处理温度的升高而转变为铁锰矿型。     

Cathodic Stripping Voltammetric Determination of Cerium Using Indium Tin Oxide (ITO)

Due to its numerous applications in the field of metallurgy and its role as an alloying element for slowing down the biodegradation of pure magnesium typically known to have very low corrosion resistance, the need to develop simple and inexpensive methods for determination of cerium is important. Ce³⁺ was determined by cathodic stripping voltammetry (CSV) using Osteryoung square‐wave voltammetry (OSWV) for the stripping step. Indium tin oxide (ITO) was used as the working electrode because of its very good positive potential range with smooth background current. Under optimized conditions, the calibration plot was linear in the concentration range of 100 nM to 700 nM Ce³⁺. A calculated detection limit of 5.8 nM was found for a 5 min deposition time at ITO based on the 3σ method. Interference from selected metal ions was also examined, and no significant interferences were observed. The good selectivity of this sensor makes it a good candidate for practical applications such as monitoring Ce³⁺ released into solution during the biodegradation of Mg−Ce alloys being developed for resorbable biomedical implants.     

Energy Recovery from Municipal Solid Waste in Small Communities

The heating values of municipal solid waste generated in three towns with a population of less than 50 000, situated in Galicia (Spain), were measured with a static bomb calorimeter. Samples of raw refuse were burnt either as received or after sorting of the different combustible components. A study was made of samples from controlled and uncontrolled landfills. The calorific values were compared with those corresponding to a commercial residual derived fuel in order to study the possibility of using municipal solid waste as a source of recovered energy. This revised version was published online in July 2006 with corrections to the Cover Date.     

回收处理含银废液的一种新方法

本文提出用铝作还原剂回收处理含银废液中的银。这一新方法具有收率高、成本低、操作简便、易于推广的特点。     

活性炭纤维吸附-蒸汽脱附回收三氯甲烷工程实例分析

采用活性炭纤维吸附-蒸汽脱附装置对江苏南通某农药厂生产工序中排放的三氯甲烷进行吸附回收。论述了该农药厂有机废气收集和处理现状、吸附剂选择、吸附装置工艺流程及操作参数、必要的安全保障等。现场运行数据表明:装置运行稳定,三氯甲烷回收率稳定在99%左右,自动化控制水平高,安全性能好,回收的三氯甲烷质量好。使用该装置后,每年可回收三氯甲烷约155 t,年净收益38万元。     

Sol-Gel Formation of ITO Thin Film from a Sol Including ITO Powder

Recently, low temperature synthesis of ITO thin film of low resistivity is desired in the field of LCD (Liquid Crystalline Display) production. This paper describes the results of experiment to produce ITO thin film from a sol containing crystalline ITO particles and alkoxides of In and Sn. Crystallization temperature of ITO thin film obtained from the sol mixed with ITO powder was lower than that of ITO from the sol without ITO powder. Furthermore, the resistivity of the former ITO thin film was lower than that of the latter. It was assumed that these results were attributed to the promotion effect of ITO crystalline particles to crystalize the amorphous ITO gel at lower temperature. This low temperature crystallization effect plays an important role in enhancing the crystallinity and electric conductivity of ITO thin film from sol-gel process.     

通过硅烷偶联剂在硅和铟锡氧化物(ITO)表面嫁接寡聚芴分子

通过硅烷偶联剂γ-氨丙基三乙氧基硅烷(3-aminopropyl-triethoxysilane,APTES)的“分子桥梁”作用,采用两种不同的方法,把修饰后的寡聚芴分子键联到硅表面和铟锡氧化物(ITO)表面上。X射线光电子能谱(XPS)、原子力显微镜(AFM)和循环伏安(CV)方法等的表征证实了通过硅烷偶联剂在硅表面和ITO表面嫁接寡聚芴分子可行性。     

Microbial Leaching of Waste Solder for Recovery of Metal

This study proposes an environment-friendly bioleaching process for recovery of metals from solders. Tin-copper (Sn-Cu), tin-copper-silver (Sn-Cu-Ag), and tin-lead (Sn-Pb) solders were used in the current study. The culture supernatant of Aspergillus niger removed metals faster than the culture supernatant of Acidithiobacillus ferrooxidans. Also, the metal removal by A. niger culture supernatant is faster for Sn-Cu-Ag solder as compared to other solder types. The effect of various process parameters such as shaking speed, temperature, volume of culture supernatant, and increased solder weight on bioleaching of metals was studied. About 99 (±1.75)?% metal dissolution was achieved in 60 h, at 200-rpm shaking speed, 30 °C temperature, and by using 100-ml A. niger culture supernatant. An optimum solder weight for bioleaching was found to be 5 g/l. Addition of sodium hydroxide (NaOH) and sodium chloride (NaCl) in the bioleached solution from Sn-Cu-Ag precipitated tin (85?±?0.35 %) and silver (80?±?0.08 %), respectively. Passing of hydrogen sulfide (H₂S) gas at pH 8.1 selectively precipitated lead (57.18?±?0.13 %) from the Sn-Pb bioleached solution. The proposed innovative bioleaching process provides an alternative technology for recycling waste solders to conserve resources and protect environment.