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利用水热法合成了3d过渡金属离子掺杂Zn3(OH)2V2O7·2H2O的微米花结构,其分子式可表达为Zn3-3xM3x(OH)2V2O7·2H2O(其中M=Cu,Co,Ni,Mn;0.001≤x≤0.20)。应用XRD、SEM、TEM、UV-Vis DRS、EDX和BET等分析测试技术对产物进行了表征。结构和形貌分析结果显示过渡金属离子掺杂后产物仍保持Zn3(OH)2V2O7·2H2O的六方晶体结构,微米花由主晶面为(0001)的纳米片组装而成。紫外-可见漫反射光谱显示过渡金属离子掺杂后带边吸收红移,其中以Cu的掺杂产物Zn3-3xCu3x(OH)2V2O7·2H2O最为明显,带边吸收扩展到可见光区。首次对Zn3(OH)2V2O7·2H2O及其不同金属离子掺杂产物Zn3-3xM3x(OH)2V2O7·2H2O进行了可见光催化降解有机污染物的研究,结果显示与其它产物相比掺0.1at%Cu的Zn2.997Cu0.003(OH)2V2O7·2H2O对亚甲基蓝(MB)的可见光催化降解效果最好。对掺杂离子种类、掺杂离子浓度对产物可见光催化性质的影响也进行了考察。 相似文献
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对传统K3[Fe(C2O4)3]·3H2O制备实验进行改造,使其由普通制备实验升级为集制备、组成定量测定和光化学性质实验为一体的综合实验。该综合性实验共需12学时完成,在技术上集配合物制备、减压过滤、蒸发浓缩结晶、重量分析、氧化还原滴定、电导率法测定离子电荷等于一体,在理论上涉及沉淀溶解、氧化还原、配位和光致变色等多种反应类型。该综合性实验对实验设备要求低,教学过程可操作性强,综合性强。经过8年的教学实践发现,该实验能大大激发学生主动思考,拓展了学生思维跨度和深度,取得良好的教学效果。 相似文献
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A Contribution on the Crystal Structure of CuYW2O8, CuHoW2O8, and CuYW2O8 Single crystals of (I) CuY2O8, (II), CuHoW2O8, and (III) CuYbW2O8 were prepared and investigated by X-ray technique. (I) crystallizes with triclinic symmetry, space group C? P1 (a = 5.939 Å, b = 6.042 Å, c = 5.025 Å; α = 112.30°, β = 111.77°; Z = 1). (II) and (III) belong to monoclinic symmetry, space group C? P2/n (II) (a = 10.045 Å, b = 5.808 Å, c = 5.021 Å; β = 94.38°; z = 2 (III) a = 9.948 Å, b = 5.824 Å, c = 5.008 Å; β = 93.36°; Z = 2). The crystal structures will be discussed with respect to other to copper rare earth tungstates. 相似文献
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ZHANG Meng TU Xianneng WANG Jingyang FANG Tuo WANG Yanli XU Xiaodong ZHANG Milin CHEN Yitung 《高等学校化学研究》2016,32(4):530-533
In this paper, CuO, CuO/Cu2O, Cu2O, Cu2O/Cu and Cu microcrystals were synthesized via a hydrothermal method by mixing Cu(NO3)2·3H2O and NaOH together in the presence of an ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate([BMIM]BF4) or 1-butyl-3-methylimidazolium chloride([BMIM]Cl). The structures and the morphologies of the obtained products were characterized by means of X-ray diffractometer(XRD), field-emission scanning electron microscopy/energy-dispersive spectroscopy(FESEM/EDS), transmission electron microscopy/selected area electron diffraction(TEM/SAED) and Raman spectroscopy. The result of XRD indicates that Cu2O and Cu microcrystals are cubic phase and the Raman spectra confirm the presence of carbon. The results of FESEM and TEM images show Cu2O microcrystals as rule cubes of 2 μm in length and Cu particles of 5 μm in diameter. According to the difference between crystal structures, bi-component and single component products were synthesized by adjusting the reaction conditions. A possible formation mechanism of Cu2O and Cu was proposed in[BMIM]BF4. 相似文献
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Blanka Kašná Libor Dostál Jaroslav Hole?ek 《Journal of organometallic chemistry》2006,691(8):1554-1559
Novel diorganotin(IV) compounds (L1,2)2SnCl2, where L1,2 are O,C,O-chelating ligands (called the pincer ligands), 2,6-bis(alkoxymethyl)phenyl-, , (L1, R = Me, L2, R = t-Bu), have been synthesized and characterized by 1H, 13C and 119Sn NMR spectroscopy, MS-ESI spectrometry and elemental analysis. The structure of both compounds (L1)2SnCl2 (1) and (L2)2SnCl2 (2) was determined by X-ray crystallography. Determination of crystal structures reveals different shapes of coordination polyhedra. While deformed octahedron was found for 1, tetrahedral geometry of the tin atom was determined for 2. The NMR spectroscopy indicates a similar structural arrangement of 1 and 2 in solution. The reaction of 1 with silver salts of low nucleophilic anions X− (X = OTf and 1-CB11H12) resulted in (L1)2SnCl(OTf) (3), (L1)2Sn(OTf)2 (4), and (L1)2SnCl(CB11H12) (5). The compounds 4 and 5 are of ionic nature both in solid state and in solution of CH3CN. 相似文献
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三环己基锡O,O'-二(4-氯苯基)二硫代磷酸酯(Ⅰ),C_(30)H_(41)Cl_2O_2PS_2Sn,M_r=718.36,单斜晶系,P2_1/n,a=16.151(2),b=9.415(1),c=22.987(3),β=105.69(1)°,Z=4,Dc=1.418g·cm ̄(-3),R=0.063;二丁基锡双[O,O'-二(4-甲基苯基)二硫代磷酸酯](Ⅱ),C_(36)H_(46)O_4P_2S_4Sn,M_r=851.66,单斜晶系,P2_1/c,a=12.284(4),b=9.807(1),c=34.471(8),β=99.02(2)°,Z=4,D_c=1.379g·cm(-3),R=0.042。化合物Ⅰ具有单分子的四配位变形四面体结构。其Sn-S(1)键长为2.501(2);而Sn与S(2)的原子间距则为3.597;化合物Ⅱ具有单分子的六配位变形八面体结构,其Sn-S(1),Sn-S(2),Sn-S(3)和Sn-S(4)的键长分别为2.495(3),2.493(2),3.244(4)和3.228(3)。 相似文献
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Stephan Schiffler Hanskarl Müller-Buschbaum 《Monatshefte für Chemie / Chemical Monthly》1987,118(6-7):741-747
Five new compounds of the BaNiNd2O5-type with the rare earth elements Sm, Gd, Ho, Er, Tm are prepared and examined by X-ray single crystal technique. The atomic parameters are refined by least-square methods. The crystal chemical differences in the surrounding of rare earth ions in BaMLn
2O5-compounds (M=Pt, Pd, Cu, Ni) are discussed. 相似文献
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由二乙醇胺与H6P2W18O62·nH2O合成了[(HOCH2CH2)2NH2]6·P2W18O62·6H2O(I).单晶结构解析结果表明晶体属三方晶系,空间群为R-3,晶胞参数:a=b=c=1.36298(16)nm,α=β=γ=106.490(17)°,Z=1,V=2.1374(4)nm3,R=0.0837,Rw=0.2219.化合物分子由一个P2W18O626 阴离子、六个质子化的二乙醇胺、六个结晶水组成.标题化合物具有可逆光色性.热分析表明,化合物阴离子在463℃左右分解. 相似文献
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The syntheses of five new aminoalkylbis(phenolate) ligands (as hydrochlorides) and their uranyl complexes are described. The reaction between uranyl nitrate hexahydrate and phenolic ligand [(N,N-bis(2-hydroxy-5-tert-butyl-3-methylbenzyl)-1-aminopropane) · HCl], H2L1 · HCl, forms a uranyl complex [UO2(HL1)2] · 2CH3CN (1). The ligand [(N,N-bis(2-hydroxy-5-tert-butyl-3-methylbenzyl)-1-aminobutane) · HCl], H2L2 · HCl, forms a uranyl complex with a formula [UO2(HL2)2] · 2CH3CN (2). The ligand [(N,N-bis(2-hydroxy-5-tert-butyl-3-methyl benzyl)-1-aminohexane) · HCl], H2L3 · HCl, yields a uranyl complex with a formula [UO2(HL3)2] · 2CH3CN (3) and the ligand [(N,N-bis(2-hydroxy-5-tert-butyl-3-methylbenzyl)-cyclohexylamine) · HCl], H2L4 · HCl, yields a uranyl complex with a formula [UO2(HL4)2] (4). The ligand [(N,N-bis(2-hydroxy-5-tert-butyl-3-methylbenzyl)-benzylamine) · HCl], H2L5 · HCl, forms a uranyl complex with a formula [UO2(HL5)2] · 2MeOH (5). The molecular structures of 1, 2′ (2 without methanol), 3, 4 and 5 were verified by X-ray crystallography. The complexes 1–5 are neutral zwitterions which form in a molar ratio of 1:2 (U to L) in the presence of a base (triethylamine) and bear similar mononuclear, distorted octahedral uranyl structures with the four coordinating phenoxo ligands forming an equatorial plane and resulting in a centrosymmetric structure for the uranyl ion. In uranyl ion extraction studies from water to dichloromethane with ligands H2L1 · HCl–H2L5 · HCl, the ligands H2L2 · HCl and H2L4 · HCl are the most effective ones. 相似文献