A polyoxometalate-based inorganic–organic hybrid material: synthesis, characterization structure and photocatalytic study

2015 ◽  
Vol 70 (7) ◽  
pp. 461-466 ◽  
Author(s):  
Jingzhi Tian ◽  
Tao Jing ◽  
Yongjie Zheng

AbstractA new polyoxometalate (POM)-based inorganic–organic hybrid compound, [Ag2(bib)3][H2SiW12O40] (1), has been hydrothermally synthesized and characterized by routine methods. Single-crystal X-ray diffraction analysis reveals that inorganic supramolecular chains constructed of POM and [Ag2(bib)3] subunits are fused together via the Ag cations forming a 3D supramolecular structure. The structure possesses the moganite-type topology. The photocatalytic properties have been investigated through the oxidative decomposition of Rhodamine-B dye.

2014 ◽  
Vol 997 ◽  
pp. 260-263 ◽  
Author(s):  
Ya Bing Liu ◽  
Peng Yu

A new polyoxovanadates-based organic-inorganic hybrid compound, [Cu(en)2]2[VV6VIV4O25] (1) has been hydrothermally synthesized and structurally characterized by the elemental analysis, and single crystal X-ray diffraction. Compound 1 consists of [Cu(en)2]2+transition metal coordination fragment and the [VV6VIV4O25]4-building blocks, which are linked together via covalently-bonding interactions to form a new 3-D networks. The degradation of rhodamine B (RhB) under UV-vis irradiation with 1 as the heterogeneous photocatalyst has been investigated, showing a good photocatalytic property of 1 for RhB degradation.


2011 ◽  
Vol 66 (5) ◽  
pp. 549-552
Author(s):  
Yan Bai ◽  
Guo Qiang Zhang ◽  
Dong Bin Dang ◽  
Ze Yan Qi ◽  
Li Zhang

The title compound [FTMA]2[CdI4] has been synthesized from [FTMA]I (ferrocenylmethyltrimethylammonium iodide) and 3CdSO4・8H2O and was characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction. The Cd(II) atom has a slightly distorted tetrahedral coordination sphere. In the solid state there are C-H・ ・ ・π interactions between adjacent ferrocenyl cations to generate a chain structure. The luminescence properties of the title compound were investigated in the solid state at room temperature


2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
R. Kefi ◽  
M. Zeller ◽  
F. Lefebvre ◽  
C. Ben Nasr

The crystal structure of the new inorganic-organic hybrid compound [4-CH3C6H4CH2NH3]2[CdCl4] has been determined by single crystal X-ray diffraction. The compound crystallizes in the orthorhombic space group Pnma with lattice parameters a=10.721(2), b=33.986(6), c=5.326(1) Å, β=97.222(1)°, V=1940.8(7) Å3, and Z=4. The framework of the title compound is built upon layers parallel to (010) made up from corner-sharing CdCl6 octahedra. 4-Methylbenzylammonium cations are situated between the layers and connect them via an N–H⋯Cl hydrogen bonding network. The Cd atom is located on an inversion centre, and the coordination environment is described as distorted octahedral. Solid state 13C CP-MAS NMR spectroscopy is in agreement with the X-ray structure. DFT calculations allow the attribution of the carbon peaks to the independent crystallographic sites. Thermal analysis and infrared spectroscopy were also used to characterize the complex.


2021 ◽  
Vol 121 ◽  
pp. 111616
Author(s):  
Vadivel Siva ◽  
Anbazhagan Murugan ◽  
Abdul samad Shameem ◽  
Shunmuganarayanan Athimoolam ◽  
Sultan Asath Bahadur

2016 ◽  
Vol 881 ◽  
pp. 398-403
Author(s):  
Jeferson Almeida Dias ◽  
Vera Lúcia Arantes ◽  
Alfeu Saraiva Ramos ◽  
Tania Regina Giraldi ◽  
Marília Zani Minucci ◽  
...  

The heterogeneous photocatalysis has been developed to treatment of recalcitrant organic effluents such as the dyes. The chemical reactions occur on a semiconductor surface exposed to electromagnetic radiation. The objective of this study was evaluate the high energy milling as a mechanism to obtain fine powders of ZnO to utilization in photocatalysis. Raw ZnO was characterized by X-Ray diffraction, BET, sedigraph and Helium pycnometry and it was milled during four and ten hours in dry and wet media. The milled powders were characterized by X-Ray diffraction and they were evaluated in photocatalytic degradation of Rhodamine B dye. The results showed high purity of the powders before and after milling and the photocatalytic efficiency was function of processing conditions. The average half-life time for the dye varied between of 990.2 and 7.6 min wherein the powder obtained by four hours in dry media milling showed the best results of photodegradation.


2008 ◽  
Vol 63 (5) ◽  
pp. 489-495 ◽  
Author(s):  
Xiang-Min Chen ◽  
De-Song Wang ◽  
Qing-Zhi Luo ◽  
Ran Wang

A new polyoxometalate(POM)-templated inorganic-organic hybrid compound, [Ag6(trz)6]- [PMo12O40]2 ・ 6H2O (1) (trz = 1,2,4-triazole) has been prepared under hydrothermal conditions and characterized by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy, thermogravimetric analysis and cyclic voltammetry. In compound 1, six Ag+ ions are linked by six trz molecules to give a hexanuclear [Ag6(trz)6]6+ cycle. The six trz molecules are not co-planar, but adopt a crown-like shape. Cavities, with sizes of about 7.706×7.706 Å2, are found with the hexanuclear cycles packed along the c axis. The Keggin anions, as templates, are inserted in the 3D supramolecular framework. The electrochemical and electrocatalytic behavior of 1 has been studied in detail. The results exhibit that the redox ability of the Keggin anions can be maintained in the hybrid solid which has good electrocatalytic activity toward the reduction of bromate, hydrogen peroxide and nitrite.


2017 ◽  
Vol 76 ◽  
pp. 118-121 ◽  
Author(s):  
Xiao-Yuan Wu ◽  
Wen-Bin Yang ◽  
Wei-Ming Wu ◽  
Jian-Zhen Liao ◽  
Sa-Sa Wang ◽  
...  

2014 ◽  
Vol 919-921 ◽  
pp. 2013-2016 ◽  
Author(s):  
Ya Bing Liu ◽  
Hong Jie Wang ◽  
Hong Kai Zhao

A POM - based organice - inorganic hybrid compound with the chemical formula of[Cu (phen)2]3[W6O19] (phen = 1,10-phenanthroline) (1) has been hydrothermally synthesized andstructurally characterized by the elemental analysis, and single crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic space groupC2/c witha=18.319(4) Å,b= 17.311(4) Å,c= 22.248(4) Å,β= 112.40(3) o,V= 6523(2) Å3,Z= 4, R1= 0.0448, andwR2=0.1218. Compound 1 consists of the [W6O19]3-building blocks and [Cu (phen)2]+metal organic cationic moieties, which are packed together via the extensive hydrogen-bonding interactions to form a three-dimensional supramolecular framework. The adsorption of methylene blue (MB) under UV irradiation with 1 as the heterogeneous adsorbent has been investigated, showing a good adsorptive property of 1 for MB degradation.


2021 ◽  
Vol 21 (11) ◽  
pp. 5784-5793
Author(s):  
K. Geetha ◽  
R. Udhayakumar

In this study, spinel NiCexFe2–XO4 (x = 0.0 - 0.5) nanoparticles (NPs) was synthesized by microwave combustion technique (MCT) utilizing the fuel of Aloe vera plant extract. The establishment of spinel cubic crystal structure was ensured by powder X-ray diffraction (PXRD) technique. The particles like nanostructured morphology were confirmed by high-resolution scanning electron microscope (HRSEM). Energy dispersive X-ray (EDX) studies confirmed the formation of spinel ferrite structure and ensured that no other elements were present. Magnetic parameters such as remanant magnetisation (Mr), coercivity (He) and saturation magnetization (Ms) were calculated from the magnetic hysteresis (M-H) loops, which exhibited ferromagnetic behaviour. The photocatalytic behavior was investigated by visible light treatment for the photocatalytic degradation (PCD) of rhodamine B (Rh-B) dye and the sample NiCe0.3Fe1.7O4 exhibits higher PCD efficiency (93.88%) than other compositions. The antibacterial activities of gram-positive S. aureus, B. subtilis, gramnegative K. pneumonia and E. coli have been investigated using undoped and Ce3+ substituted NiFe2O4 NPs and observed higher activity, which indicated that, they can be used in the bio-medical applications.


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