[(2,2′-bipy)2VO2](H2BO3)·3H2O的水热合成和晶体结构

有机-无机杂化钒氧配合物的合成研究越来越引起人们浓厚的兴趣,这是由于它新颖的结构和在催化、电化学、光化学、吸附、离子交换和磁性能方面具有潜在的应用前景[1-8].功能体系的有机-无机杂化材料的构筑取决于反应物相互作用的本性.近年来,将有机胺分子作为结构导向剂引入无机骨架中,获得了一系列结构新颖的化合物[9,10].     

新型无机-有机杂化微孔晶体Cd3(BDC)0.5(BTC)2(DMF)(H2O)·3DMF·H3O·H2O的合成与结构

传统分子筛是以硅氧四面体和铝氧四面体为骨架的微孔晶体材料. 近年来, 以无机-有机结构单元为骨架组成的微孔晶体材料已引起人们的广泛关注[1～19]. 该类材料是由金属离子(或金属氧簇)与有机配体(大多数是芳香多酸和多碱)构成的建筑单元通过共价键或者分子间作用力构成的. 无机-有机杂化晶体材料有多种结构类型, 如1-D, 2-D, 3-D和笼状结构等.     

二维配位聚合物(NH3+CH2CH2NH3+)(NH2CH2CH2NH3+)2[(VO)4(PO4)4(H2O)2]·2H2O的水热合成及晶体结构

无机-有机杂化钒氧酸盐由于其结构的多样性以及在催化、医药、光、电、磁等材料领域中的应用前景而受到人们的广泛关注。近年来这一研究领域的重大进步是将有机氮配体或者过渡金属配合物直接连接到矾氧骨架上以获得各种新奇结构。合成出许多属于L/V/O、MXLY/V/O、L/P/V/O和MXLY     

无机-有机杂多盐[Bmim]5PMo10V2O40的制备及电催化性能

磷钼钒杂多酸盐;无机-有机杂化;碳糊修饰电极;电催化     

有机-无机杂化膜的研究进展

有机-无机杂化膜由于具备了无机膜和有机膜各自的特点,具有良好的分离特性和物化稳定性,因而成为当前膜技术领域新型膜材料研究的热点.本文主要介绍了近年来国内外有机-无机杂化膜的研究现状、杂化膜的制备方法、结构和应用.     

[(2,2''''-bipy)_2VO_2](H_2BO_3)·3H_2O的水热合成和晶体结构

有机-无机杂化钒氧配合物的合成研究越来越引起人们浓厚的兴趣,这是由于它新颖的结构和在催化、电化学、光化学、吸附、离子交换和磁性能方面具有潜在的应用前景犤1～8犦。功能体系的有机-无机杂化材料的构筑取决于反应物相互作用的本性。近年来,将有机胺分子作为结构导向剂引入无机骨架中,获得了一系列结构新颖的化合物犤9,10犦。它们通过共价键和(或)氢键自组装成零维、一维、二维和三维网络犤11,12犦。例如零维的犤(N2C6H14)2VO(PO3OH)4(B3O3OH)犦犤13犦、一维钒氧链犤Cu(dien)V2O6犦犤11犦,犤Cu(NH3)2V2O6犦犤14犦,犤狖Co(phen…     

Cd基化合物纳米晶-有机聚合物杂化太阳能电池研究进展

有机-无机杂化太阳能电池因其结合了有机材料和无机材料各自的优势而引起了人们的广泛关注和研究. Cd基化合物纳米晶因其具有制备方法简单、尺寸及形貌可控、载流子迁移率高和稳定性好等优点而成为最早被研究的一类无机受体. 本文介绍了有机-无机杂化太阳能电池的结构及原理, 分析了影响有机-无机杂化太阳能电池效率的三个主要因素, 分别是开路电压(V_oc)、短路电流(J_sc)和填充因子(FF). 从改善Cd基化合物纳米晶的合成方法, 增加Cd基化合物纳米晶和有机聚合物间的界面接触, 以及优化Cd基化合物纳米晶和有机聚合物所用溶剂和所占比例等方面阐述了近年来Cd基化合物纳米晶-有机聚合物杂化太阳能电池的研究进展. 并展望了Cd基化合物纳米晶-有机聚合物杂化太阳能电池的发展方向.     

三维无机-有机杂化骨架微孔材料Cd(HBTC)(EG)·8(H2O)的合成与结构

由于无机-有机杂化微孔晶体材料在选择性催化、分子识别和可逆性主客体分子(离子)交换等方面存在潜在的应用前景,已经越来越引起人们的广泛注意.传统的沸石和分子筛微孔晶体材料以硅酸盐、硅铝酸盐、磷铝酸盐和无机金属磷酸盐为骨架,新型的无机-有机杂化微孔晶体材料用刚性和热稳定性较好的有机分子和金属离子作为结构单元.均苯三甲酸(H3BTC)是常用的含氧有机配.     

无机固体功能材料的水热合成化学

综述了无机固体功能材料的水热合成化学进展。重点强调强关联系固体、无机-有机杂化材料、缺陷与混合价态固体、三重价态与原子尺度p-n结以及水热生物化学。     

无机-有机杂化光催化剂:合成、机理及应用（英文）

由无机与有机组分组成的无机-有机杂化材料因其优异的性能及良好的物理化学性质在光催化领域得到了广泛的关注.目前,已经开发的单相光催化剂有很多种,但其很难同时满足宽的光激发范围以及高的光吸收能力和强的氧化还原能力等需求,因此,科研人员开发了很多方法去解决上述问题,主要包括以下两大类.第一类,修饰光催化剂扩大光激发范围以及增强可见光吸收.例如构建固溶体、引入表面缺陷、杂质掺杂、染料敏化和表面等离子体共振等策略.第二类,构建半导体异质结,通过界面处的协同作用有效促进光生电子空穴对的转移与分离.例如type II型、直接Z型以及S型异质结等.有机成分与无机成分的杂化是有效解决上述问题的方法之一.大部分有机材料具有成本低、吸光系数高以及比表面积大等优点;但低的强度以及宽的带隙限制了有机材料在光催化上的应用.而大部分无机材料具有高强度、窄带隙以及良好的光学性能.但低韧性和较差的分散性限制了无机材料在光催化上的应用.无机-有机杂化材料不仅保留了无机与有机组分的原有性质,而且界面处组分之间的协同作用会产生新的性质,如高的载流子传输能力和高的光吸收能力等.无机-有机杂化材料是多相材料,其中的一相是纳米材料...     

Determination of thiourea and some of its organic derivatives with sodium vanadate, hexacyanoferrate(III), Cerium(IV) sulphate, manganese(III) and manganese(IV)

The determination of thiourea and some of its organic derivatives with sodium vanadate, hexacyanoferrate(III), cerium(IV) sulphate, manganese(III) and manganese(IV) is described. A mixture of iodate and iodide is used as catalyst. Ferroin, N-phenylanthranilic acid and p-ethoxychrysoidine can be used as indicators.     

2-Nitrodiphenylamine as a versatile high-potential reversible oxidation-reduction indicator

The use of 2-nitrodiphenylamine as a reversible indicator has been investigated in the titration of iron(II) with cerium(IV) sulphate, potassium dichromate and sodium vanadate in sulphuric acid media. Accurate results can be obtained with cerium(IV) sulphate in 0.5–5.0 M acid, with potassium dichromate in 5.0–7.0 M acid, and with sodium vanadate in 5.0–7.5 M acid. With cerium(IV) sulphate the titrations are preferably conducted in 2.0 M sulphuric acid or in a 1.0 M. sulphuric acid-1.0 M pechloric acid medium. Tungstic acid, acetic acid, arsenic(III) and manganese(II) do not interfere. In titrations of iron(II) with dichromate and vanadate, the colour changes at the end-point are much more vivid with 2-nitrodiphenylamine than with ferroin.     

Metal Oxide/Graphene Composites for Supercapacitive Electrode Materials

Graphene composites with metal or metal oxide nanoparticles have been extensively investigated owing to their potential applications in the fields of fuel cells, batteries, sensing, solar cells, and catalysis. Among them, much research has focused on supercapacitor applications and have come close to realization. Composites include monometal oxides of cobalt, nickel, manganese, and iron, as well as their binary and ternary oxides. In addition, their morphological control and hybrid systems of carbon nanotubes have also been investigated. This review presents the current trends in research on metal oxide/graphene composites for supercapacitors. Furthermore, methods are suggested to improve the properties of electrochemical capacitor electrodes.     

A designed single-step method for synthesis and structural study of organic-inorganic hybrid materials: well-ordered layered manganese oxide nanocomposites

A fast and single-step method was successfully developed toward synthesizing well-ordered organic-inorganic hybrid layered manganese oxide (LMO) nanocomposites and Keggin/organic ions intercalated into layered manganese oxide at room temperature in 1 day. The ordering of layered structures is highly dependent on pH and drying conditions. The Keggin/organic intercalated LMO shows improved thermal stability of the layered structure over that of hybrid LMO.     

In situ interfacial nanoengineering of imidazole-bridged one-dimensional AgVO3 nanoribbons by Ag fractals

The major bottleneck in harnessing the potential of solid-solid interfacial hetero structures involves incoherent interface constructions and complicated synthesis approaches. In this context, a synthesis strategy involving in situ interfacial manipulation of imidazole-bridged one-dimensional single-crystalline nanoribbons is developed through the dynamic growth of Ag fractals. This article successfully demonstrates structural and morphological changes in the monoclinic patterns of silver vanadate nanoribbons with Wulf constructions. These are associated with in situ electron beam perturbations and can be attributed to β-phase silver vanadate crystals. The dynamics and topological modifications induced on the nanohybrid interfaces mechanistically suggest the ability of the novel hybrid interfaces in harnessing and storing photogenerated auxiliary charge carriers. The synthesis methodology used enables in overcoming major bottleneck in nanoengineering of solid-solid interfacial heterostructures by using real-time feedback of the imaging e-beam to precisely fabricate these heterostructures and study the interface transition.     

Manganese oxide-based materials as electrochemical supercapacitor electrodes

Electrochemical supercapacitors (ECs), characteristic of high power and reasonably high energy densities, have become a versatile solution to various emerging energy applications. This critical review describes some materials science aspects on manganese oxide-based materials for these applications, primarily including the strategic design and fabrication of these electrode materials. Nanostructurization, chemical modification and incorporation with high surface area, conductive nanoarchitectures are the three major strategies in the development of high-performance manganese oxide-based electrodes for EC applications. Numerous works reviewed herein have shown enhanced electrochemical performance in the manganese oxide-based electrode materials. However, many fundamental questions remain unanswered, particularly with respect to characterization and understanding of electron transfer and atomic transport of the electrochemical interface processes within the manganese oxide-based electrodes. In order to fully exploit the potential of manganese oxide-based electrode materials, an unambiguous appreciation of these basic questions and optimization of synthesis parameters and material properties are critical for the further development of EC devices (233 references).     

A manganese oxide with phenol groups as a promising structural model for water oxidizing complex in Photosystem II: a 'golden fish'

We describe here the ability of manganese oxide monosheets to aggregate to form layered structures with 4-aminophenol molecules. These aggregated monosheets could be considered as the first step to synthesize a self-assembled layered hybrid of phenol-manganese ions with phenol and manganese(III) and (IV) as exists in the water oxidizing complex of Photosystem II.     

Matrix polyelectrolyte capsules based on polysaccharide/MnCO₃ hybrid microparticle templates

An efficient strategy for biomacromolecule encapsulation based on spontaneous deposition into polysaccharide matrix-containing capsules is introduced in this study. First, hybrid microparticles composed of manganese carbonate and ionic polysaccharides including sodium hyaluronate (HA), sodium alginate (SA) and dextran sulfate sodium (DS) with narrow size distribution were synthesized to provide monodisperse templates. Incorporation of polysaccharide into the hybrid templates was successful as verified by thermogravimetric analysis (TGA) and confocal laser scanning microscopy (CLSM). Matrix polyelectrolyte microcapsules were fabricated through layer-by-layer (LbL) self-assembly of oppositely charged polyelectrolytes (PEs) onto the hybrid particles, followed by removal of the inorganic part of the cores, leaving polysaccharide matrix inside the capsules. The loading and release properties of the matrix microcapsules were investigated using myoglobin as a model biomacromolecule. Compared to matrix-free capsules, the matrix capsules had a much higher loading capacity up to four times; the driving force is mostly due to electrostatic interactions between myoglobin and the polysaccharide matrix. From our observations, for the same kind of polysaccharide, a higher amount of polysaccharide inside the capsules usually led to better loading capacity. The release behavior of the loaded myoglobin could be readily controlled by altering the environmental pH. These matrix microcapsules may be used as efficient delivery systems for various charged water-soluble macromolecules with applications in biomedical fields.     

Design and synthesis of hybrid solids based on the tetravanadate core toward improved catalytic properties

Five inorganic–organic hybrid vanadates based on tetravanadate cores, transition metals and N-donor ligands have been designed and synthesized under hydrothermal conditions, namely, [Zn(eIM)_3]_2V_4O_(12)(1), [Zn(pIM)_3]_2V_4O_(12)H_2O(2), [Zn(ipIM)_3]_2V_4O_(12)(3), [Co(e IM)_3]_2V_4O_(12)H_2O(4), [Cu(eIM)_2(H+2O)]_2V_4O_(12)(_5)(eIM = 1-ethylimidazole, p IM = 1-propylimidazole, ip IM = isopropylimidazole). All compounds were fully characterized by single-crystal XRD, powder XRD, elemental analysis, TGA, and FT-IR spectroscopy.The hybrid zinc vanadates(1–3) and cobalt vanadate(4) exhibit interesting 2D folded structures and the hybrid copper vanadate(5) presents a 1D chain configuration. All compounds can catalyze olefin epoxidation reactions when using TBHP(TBHP = tert-butyl hydroperoxide) as an oxidant in acetonitrile.The introduction of transition metal ions into tetravanadate cores not only improved the catalytic activity but also fulfilled the heterogeneous catalytic behavior. 1–5 all exhibit extraordinary efficiency in converting olefins to the corresponding epoxides with high conversion and selectivity(particularly,conv. up to 97.1%, sele. up to 100% for 1). Leaching test was also carried out to prove the heterogeneous behavior.     

二元ZnCo-LDH助催化剂对BiVO4光电化学性能的促进

钒酸铋(BiVO_4)是最有前景的将太阳能转化为氢能(STH)的光阳极材料之一,但其本身严重的电子-空穴复合严重影响了其实用性。本文中,我们报道了用一步电沉积法将高效的二元ZnCo-LDH助催化剂沉积在钒酸铋(BiVO_4)光阳极上,大大提升了钒酸铋(Bi VO4)的光吸收能力,并且加速了水氧化反应动力学,显著促进了光生空穴向半导体表面的转移,减轻了表面电荷复合。BiVO_4/ZnCo-LDH光阳极在1.23 V(vs RHE)偏压下,0.5 mol·L-1磷酸钾(KPi)电解液中的光电流密度达到2.85 mA·cm~(-2),是纯BiVO_4的2.59倍,且起始电位(Von)从930 m V下降到270 m V。BiVO_4/ZnCo-LDH复合光阳极表现出65%的高表面电荷分离效率(1.23 V(vs RHE)),而纯BiVO_4的仅为30%。