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纳米Fe0对Cr(VI)的还原及其影响因素
纳米 Ｆｅ
2013/1/6
采用纳米Ｆｅ０还原水溶液中的Ｃｒ（Ⅵ），考察纳米Ｆｅ０投加量、Ｃｒ（Ⅵ）初始浓度、溶液ｐＨ值和有机酸等因素对Ｃｒ（Ⅵ）还原的影响。结果表明，纳米Ｆｅ０对Ｃｒ（Ⅵ）的还原效果明显，其对Ｃｒ（Ⅵ）的还原率分别是铁粉和铁屑的７和１３倍。Ｃｒ（Ⅵ）溶液初始质量浓度为２０ｍｇ·Ｌ－１、Ｆｅ０投加量为５ｇ·Ｌ－１条件下，反应２４ｈ时纳米Ｆｅ０对Ｃｒ（Ⅵ）的还原率达８２．７％。溶液低ｐＨ值可以促进Ｆｅ０的腐蚀速...
研究了用紫外激光(355 nm)诱导C_(60)与金属羰基化合物M(CO)_6(M＝Cr；Mo，W)的配位反应，合成了具有C_(4υ)对称性的配位络合物(η~2－C_(60))M(CO)_5，并初步讨论了C_(60)与M(CO)_6反应的动力学过程．
以Cd2＋和[Cr(CN)6]3－为建筑基元通过自组装合成普鲁士蓝类配位聚合物KCd[Cr(CN)6]•H2O (1•H2O), 并用红外光谱、元素分析、单晶X射线衍射、粉末X射线衍射、热重分析和氮气吸附脱附等手段对其进行了表征. 配位聚合物1•H2O属于面心立方晶系, 空间群Fm-3m, 晶胞参数: a＝b＝c＝1.09059 mn, α＝β＝γ＝90°. 配...
摘要 本文报道在四氢呋喃溶液中用金属铬粉作还原剂与四氯化钛作用, 所得到的活性低价钛和苄氯苄二氯-a,a,a-三氯甲基苯, 芳醛以及芳酮的反应性能, 并讨论了低价钛组份的ESR波谱。
掺杂Cr助剂的Pt/USY催化剂上正庚烷异构化反应研究（Hydroisomerization of n-Heptane over Pt/USY Catalysts Promoted by Cr Additive）
加氢异构化 正庚烷 助剂 USY Pt
2010/8/24
The Pt-supported USY zeolite catalysts doped with Cr, Al or Zn were prepared by impregnation, and characterized by XRD, low temperature nitrogen physisorption, H2-chemisorption and IR spectroscopy o...
Ti-V-Nb-Cr-Ni电极合金的微观结构及某些动力学性能研究（Microstructure and Some Dynamic Performances of Ti-V-Nb-Cr-Ni Electrode Alloy）
电极合金 Ni-MH电池 V基固溶体 电化学阻抗
2010/8/24
本文采用XRD，FESEM-EDS及电化学阻抗谱(EIS)等方法对V基固溶体Ti0.25V0.34Nb0.01Cr0.10Ni0.30电极合金的微观结构及某些动力学性能，如交换电流密度(i0)、氢的扩散系数(D)等进行了研究。XRD和FESEM-EDS分析测试结果表明：Ti0.25V0.34Nb0.01Cr0.10Ni0.30电极合金由BCC结构的V基固溶体主相和少量的TiNi基第二相组成，其中，...
The Synthesis and Applications of Cr-Doped GLYMO and GLYMO/DAMO Surface Coating Systems for Absorbing UV-light by Sol-Gel Process
Sol-gel technique coating optical properties GLYMO
2010/4/20
A new glass coating system, containing g- glycidoxypropyltrimethoxysilane/Cr3+ (system I:GLYMO/ Cr3+) and g-glycidoxypropyltrimethoxysilane/N-aminoethyl-3- aminopropyltrimethoxysilane/Cr3+ (system II:...
Defect Structure and Properties of Sr-Doped La Cr O3-d
Defect modeling LSC Perovskite Nonstoichiometry Conductivity
2010/4/20
A defect chemical model for the behavior of acceptor-doped LaCrO3 as a function of oxygen pressure is proposed. This is considered within the regime that corresponds to oxygen deficit oxygen. The math...
Evaluation of sample pre-treatment procedures for the determination of Cr, Ni and V in biological matrices by ETAAS
decomposition electrothermal atomic absorption spectrometry Cr Ni V determination biological materials
2010/4/23
Electrothermal atomic absorption spectrometry (ETAAS) was applied for the determination of chromium, nickel and vanadium in biological materials (earthworms, feather, lucerne). Three different decompo...
茂铁基多核配合物猝灭*Cr(bpy)3+3发光过程研究。