一维金属纳米材料的制备技术

一维金属纳米材料很好地集合了一维纳米结构材料和金属的特性，在光学、电学、磁学等领域有着不可忽视的潜在应用前景，且一维金属纳米材料的成功制备对于顺利实现纳米尺度功能组件的实用化意义重大。该文作者综述了一维金属纳米材料（纳米线、纳米棒、纳水管）的最新制备进展，重点评述了模板合成法、台阶边缘修饰法、介孔层状结构替曲法、软溶液法制备一维金属纳米材料的过程及生长机理，分析了目前研究上存在的问题，同时展望了未来的发展趋势。     

SiC纳米线的制备及其发光性能的研究

采用热蒸发法,以SiO与活性碳混合粉末为原料在1400℃的条件下制备出SiC纳米线.通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能谱仪（EDS）及X-射线衍射分析（XRD）等手段对制备的SiC纳米线进行了表征及生长机理分析.研究表明：SiC纳米线表面光滑、平直,沿[111]方向生长,直径为30～60nm,长约数十微米,内部为约数十纳米的SiC晶体层外部约为2nm的SiO2层的异质机构.SiO作为硅源时的SiC纳米线产量高于其他硅源.最后通过光致发光（PL）光谱研究了SiC纳米线的PL特性.     

氧化铝模板法制备Ce掺杂二氧化钛纳米管

以多孔有序阳极氧化铝（AAO）为模板,利用溶胶-凝胶法制备掺杂稀土铈的二氧化钛纳米管,采用X射线衍射仪、透射电镜和场发射扫描电子显微镜对氧化铝模板和二氧化钛纳米管进行表征,并分析了纳米管的形成机理。实验结果表明：以模板法配合溶胶-凝胶法可以制备得到管径均匀的铈掺杂二氧化钛纳米管,其尺寸在25—50nm之间。     

三正辛胺从硫酸溶液中萃取铬(Ⅵ)的研究

研究了三正辛胺（TnOA）从硫酸溶液中萃取铬（Ⅵ）．考查了水相酸度、被萃物和萃取剂与SO4-离子浓度、萃取时间及温度等诸因素对萃取铬（Ⅵ）的影响。用饱和法、摩尔比法和等摩尔系列法等联合确定萃合物的组成和萃取平衡的机理．表明萃取过程属阴离子交换机理．揭示了Deptuta等对铬（Ⅵ）的萃取型体的不同结论。     

TnOA—H2SO4体系萃取Cr（Ⅵ）的研究

本文研究了TnOA-H2SO4体系萃取铬（Ⅵ），考察了酸度、被萃物、萃取剂与SO4(2-)浓度、萃取时间和温度等因素对萃取的影响。用饱和法、摩尔比法、等摩尔系列法和IR法联合确定苹合物的组成和萃取平衡机理，表明萃取过程属阴离于交换机理，揭示了Deptuta等对Cr（Ⅵ）的萃取型体的异论。     

刀具涂层技术的研究现状和发展趋势

结合近年来刀具涂层技术的发展状况,介绍了各种刀具涂层材料,结构以及制备方法。将涂层材料分为硬涂层与软涂层进行了介绍。综述了各种涂层结构。刀具涂层的制备方法包括化学气相沉积法（CVD）、物理气相沉积法（PVD）、等离子体化学气相沉积法（PCVD）和溶胶-凝胶法（Sol-Gel）等。介绍了刀具涂层工艺的研究现状,并对刀具涂层的发展方向进行了探讨。     

TiC晶须的制备及应用

TiC晶须以其优异的物理和化学性能具有重要的研究意义和实用价值.该文综述了国内外TiC晶须的最新研究进展,详细介绍了几种制备TiC晶须的典型方法,如碳热还原法、化学气相沉积法、原位合成法、溶胶-凝胶法等,并指出了这几种制备方法的优缺点,分析、讨论了TiC晶须的2种生长模型及机理;介绍了TiC晶须作为增强增韧相在陶瓷基复合材料、金属基复合材料中的具体应用情况,展望了TiC晶须的发展前景.     

铁纤维对气相沉积碳材料生长和形貌的影响

化学气相沉积法制备的纳米碳材料（碳纳米管，碳纤维）的生长和形貌取决于其制备工艺条件，包括催化剂的组成，制备温度，碳源的种类等。以铁纤维为催化剂、甲烷为碳源气体、在不锈钢基底上制备碳材料后，通过扫描电子显微镜分析和考察铁纤维对产物的生长和形貌的影响。研究发现：在有铁纤维的位置，甲烷裂解生成的活性碳原子移动形成的碳层成为生长内核，生成直径为100-300nm的碳纳米管；在没有铁纤维的位置，含有硅元素的小质点成为形核点，生成直径为1～2μm的碳纤维。     

铈锆氧化物固溶体前驱物热分解动力学的研究

采用固相法制备了纳米级铈锆氧化物固溶体,对铈锆氧化物固溶体前驱物热分解动力学进行了研究。利用热重、差热分析等方法推测了前驱物的热分解机制。用Kissinger法计算前驱体的热分解活化能,Ea=137.80 kJ.mol^-1。通过Coats-Redfern法,采用不同的固相动力学反应机制研究前驱体的热分解动力学,确定其机制函数为：G（a）=[-ln（1-a）]1/2,判断前驱体热分解反应为随机成核-随后生长机制。     

亚胺基团对Schiff碱基过渡金属聚合物电化学性能的影响

采用化学合成法分别制备具有不同亚胺基团的单体Ni（salen）、Ni（salphen）,并分别配制成浓度为1 mmol/L单体溶液.在电化学工作站上,以制备好的碳纳米管电极片为工作电极,用循环伏安法进行电化学聚合得到对应的Schiff碱基过渡金属聚合物.用场发射扫描电镜观察聚合物的微观形貌,以及进行循环伏安法、恒流充放电法、交流阻抗谱测试.结果显示,聚合物poly[Ni（salen）]在碳纳米管层表面形成了带状聚合物,而聚合物poly[Ni（salphen）]沿着碳纳米管沉积生长.经测试得知：聚合物poly[Ni（salen）]和poly[Ni（salphen）]的最大电荷扩散系数分别为1.86×10-9 cm2/s、1.23×10-8 cm2/s,并且在0.05 mA/cm2下的比容量分别为66.6 F/g、106.3 F/g.具有亚胺苯环基团的Schiff 碱基过渡金属聚合物电化学性能较具有亚胺乙基基团的电化学性能更好.     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.