Results 1 to 10 of about 731 (93)
Zhejiang Daxue xuebao. Lixue ban, 2014 分别以链形二胺和环形二胺为原料合成了2种不同结构的DTC（二硫代氨基甲酸盐）DTC-1和DTC-2，采用红外光谱对其结构进行了表征，并用于废水中Cu2+，Ni2+，Zn2+，Cr3+重金属离子或络合态重金属离子的去除. 研究结果表明，原料中胺的结构对捕集效果的影响较大，DTC-1捕集重金属的能力顺序为Cu2+>Ni2+>Cr3+>Zn2+,对Zn2+几乎没有去除效果，而DTC-2捕集4种重金属的能力顺序为Cu2+>Ni2+>Zn2+>Cr3+，对常见的4种游离态的重金属离子均有理想的捕集效果；DTC ...
LAIShuixiu(赖水秀) +3 more
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Shuitu Baochi Xuebao, 2006 研究了酸度对土壤溶液中铜形态的影响以及不同形态铜与黑麦草吸收及其生长的关系。结果表明：酸度强烈地影响土壤溶液中铜的化学形态，随着酸度的增加，土壤溶液中各种形态铜的含量包括水溶态铜、离子态铜及与易溶有机物结合的铜都相应增加，而且随处理铜浓度的增加不同酸度土壤上的差异更大。酸度能影响黑麦草对铜的吸收，随酸度的增加，黑麦草对铜的吸收增加。其中在对照及低铜处理中两种土壤的差异不显著，而在处理铜浓度高于50mg／kg以后两种土壤上的黑麦草铜含量差异都达显著水平。黑麦草的生长随土壤酸度的增加而变差 ...
李文庆, 张民, 束怀瑞
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Zhejiang Daxue xuebao. Lixue ban, 2011 采用共沉淀法制备了CuO掺杂的Mn-Ce-O复合氧化物固溶体催化剂，采用X射线衍射、拉曼光谱、程序升温还原等表征技术考察了上述催化剂的结构和还原性能，并将其应用于甲醛的催化燃烧反应.结果表明，铜的添加量质量分数为5.0% CuO时，催化活性最好，这主要与催化剂中CuO以高分散、非晶相存在形态，以及萤石型结构的复合氧化物Cu-Mn-Ce-O固溶体的形成密切相关.固溶体生成所形成的表面晶格氧缺陷提高了对氧的吸附和活化能力，增加了Cu-Mn-Ce间的协同相互作用，改善了催化剂中铜和锰的分散 ...
DENGLi-jie(邓丽杰) +3 more
doaj +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2001 以硝酸铈和硝酸锆为原料，采用共沉淀法制备了不同摩尔比（0，0.1，0.2〜0.9，1.0）的CemZr1-mO2样品.并以Ce0.5Zr0.5O2为载体，采用浸渍法负载不同含量的CuO，在色谱流动法上考察其对CO的氧化活性.并用XRD，TPR和BET等技术对CuO/Ce0.5Zr0.5O2各样品进行了表征.结果表明，当CuO负载量为5.0%时，其CO的氧化活性最高.XRD测定表明其氧化活性的高低与铜物种在Ce0.5 Zr0.5O2上的分散状态有关.TPR结果亦显示活性的高低与Ce0.5Zr0 ...
JIANGXiao-yuan(蒋晓原) +4 more
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Study on Absorption of Cu~(2+) by Inorganic Colloid of Brown Desert Soil in Xinjiang [PDF]
, 2008 选用采自新疆阿克苏地区典型的棕漠土壤,用模拟吸附方法研究棕漠土无机胶体在不同阴阳离子作用下对Cu2+的吸附特征,得出:棕漠土无机胶体对铜的等温吸附曲线可以用Langmuir等温方程式拟合,解吸后,铜在胶体内的残余量与加入溶液的浓度呈很好的一次函数关系;随着加入支持电解质浓度的增加,胶体对铜的吸附量逐渐减少;不同电解质溶液对土壤无机胶体吸附铜的影响不一样,在Cl-存在下,对铜竞争吸附的影响K+>NH4+>Na+;当支持电解质阳离子浓度相同时,阴离子对胶体吸附铜的影响都为SO42->Cl-This ...
孙红专, 杨剑虹, 陈秋兰
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT By adding CuO, the worm‐like amorphous phase and atomic clusters were simultaneously introduced, enabling the (Ni40Ti40Cu20)99.9O0.1 alloy micron columns to exhibit a uniform flow strain of over 40% and a strength of over 2.5 GPa during compression.
Huwen Ma +13 more
wiley +1 more source
Direct Observation of Matrix‐to‐Precipitate Elemental Diffusion in Severe Plastic Deformation
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Elemental redistribution, particularly the solute exchange between the matrix and precipitates, is a central issue in alloys subjected to severe plastic deformation (SPD). To elucidate this behavior, a nickel–aluminum bronze (NAB) alloy was processed by high‐pressure torsion (HPT), and its microstructural evolution was systematically ...
Xiaobin Yang +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Single‐atom catalysis hinges on fundamental challenges in precisely controlling metal‐support interactions and rationally regulating metal–adsorbate relationships. Herein, we report a universal strategy for constructing highly efficient and well‐defined Cu(I) single‐atom catalysts based on a trifurcate AlL3 molecular support.
Donghui Zhang +9 more
wiley +1 more source
The Microstructure Evolution and Mechanical Properties of (FeCoCrNi)100‐x(AlCu)x High‐Entropy Alloys
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT This study systematically investigates the effects of AlCu addition on the microstructural evolution and mechanical properties of (FeCoCrNi)100‐x(AlCu)x (x = 0, 5, 10, 15, 20; at%) high‐entropy alloys (HEAs). The results reveal that the microstructure evolves from coarse equiaxed to refined equiaxed, dendritic, and ultimately dual‐phase ...
Shunfu Xie +7 more
wiley +1 more source
A Green Anodic Electrolysis Strategy for Recovering Copper and Selenium From Cuprous Selenide
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Selenium, a rare strategic metal, is essential for advanced technologies and biological systems. Cuprous selenide (Cu2Se), a selenium‐rich compound found in copper anode slime and a promising thermoelectric material, holds great potential for recovery.
Jihua Li +7 more
wiley +1 more source