共搜索到20055条信息，每页显示10条信息，共2006页。用时：0小时0分0秒630毫秒
to be reduced in the solution with the pH above 7, because the existing Co(II)-citrate complex species [Co(C6H5O7)]- and [Co(C6H4O7)]2- are more difficult to be reduced than the hydrogen ion. Key words: Co(II... to a kind of new and more stable Co(II)-citrate complex with the improving of citrate concentration, and the reduction potential of the complex is more negative than that of the hydrogen ion. Fig. 1......
胶-凝胶法分别制备未掺杂和钴掺杂TiO2溶胶,室温下将其分别与三乙胺反应制得氮掺杂和(Co, N)共掺杂的TiO2溶胶,然后通过浸渍-提拉法在钛片上成膜,经烧结获得掺杂光电极.采用XRD,SEM,XPS和紫外-可见光谱和光电流作用谱等对电极进行表征,并探讨其光电响应机理.结果表明:TiO2共掺杂后并未引起TiO2能带边缘位置发生明显改变,N主要以NOx形式掺杂；(Co, N)共掺杂TiO2薄膜电极...催化性能.已有报道显示钴[5]和氮元素[4, 10]的单掺杂具有较好的可见光催化活性.为进一步提高薄膜的可见光电响应性能,本文作者采用共掺杂的方法制备(Co, N)共掺杂TiO2电极,对其进行XRD,SEM,XPS等表征,对其光电性质进行较为系统的研究,探讨其光电响应提高的可能机理.迄今为止这种采用金属和非金属共同掺杂的方法来提高电极的可见光电响应的研究未见报道. 1 实验 1.1......
......
Trans. Nonferrous Met. Soc. China 28(2018) 2265-2273 Preparation and catalytic behavior of reduced graphene oxide supported cobalt oxide hybrid nanocatalysts for CO oxidation Yan WANG1,4, Ze-hua... catalysts possess high specific surface area and narrow pore size distribution. The catalytic properties of the as-prepared rGO-Co3O4 catalysts for CO oxidation were evaluated through a continuous......
Trans. Nonferrous Met. Soc. China 28(2018) 469-486 Co evolutions for WC-Co with different Co contents during pretreatment and HFCVD diamond film growth processes Xin-chang WANG1, Cheng-chuan WANG1... and Technology, University of Ji’nan, Ji’nan 250022, China Received 22 July 2016; accepted 3 March 2017 Abstract: Systematical researches were accomplished on WC-Co with different Co contents (6%, 10......
前景. 关键词:配合-沉淀体系；钴；镍；除铁 中图分类号:P618.31；TF815；TF816 文献标志码:A Separation properties of ion to cobalt...; ion removal 钴是重要的战略金属,具有耐高温,耐腐蚀,高强度和强磁性等特点[1].镍是一种近似银白色的金属,具有铁磁性和延展性,能导电和导热,主要用途为不锈钢,合金钢,特种钢,镍基合金,电镀和非金属领域[2].钴,镍金属及其化合物应用广泛,但中国钴资源比较稀缺,以贫矿居多,独立成矿的钴矿物仅占5%,每年需从国外进口钴约1 000~1 200 t[3].中国镍矿产量的增长速度低于镍的消费增长......
......
-analysis (EPMA). With the increase of temperature, cobalt removal can be improved considerably. The mechanism of cobalt removal by zinc powder is thought as follows. Firstly, the cobalt ion forms Co-Zn...中钴的机理,可以对湿法炼锌工艺的净化提供理论指导,进一步优化除钴工艺,以期对硫酸锌溶液杂质进行深度净化. 相对于其它置换体系,如Ag-Cu,Cu-Fe,Cu-Zn和Cd-Zn,Co-Zn体系缺乏足够的理论研究,主要是因为该体系复杂,添加剂的加入及影响因素较多. 在悬浮颗粒上进行的置换,比在旋转圆盘或者旋转圆柱体上的置换具有更大的意义,因为工业规模的置换过程往往采用粒状金属粉末在各种搅拌式反应器......
......
放电循环性能,且大电流放电能力提高；随着掺钴量的提高,大电流充放电性能与循环过程中容量的保持率也提高. 关键词:锂离子电池；锰酸锂；尖晶石；钴掺杂；正极材料 中图分类号:TM 912.9 文献标识码:A Preparation and electrochemical characterization of Co-doping lithium...: (a) LiMn2O4; (b) LiCo0.1Mn1.9O4; (c) LiCo0.2Mn1.8O4 图2 LiCoxMn2-xO4的晶格常数与掺钴量x的关系 Fig.2 Relationship between lattice constant and Co-doped amounts x of LiCoxMn2-xO4 2.2 粒度分析 通过粒......
