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Synthesis,characterization And Catalytic Performance Of Transition Metal-organic Nitrogen Complex Co-modified Polyoxometalates

Posted on:2020-11-28Degree:MasterType:Thesis
Country:ChinaCandidate:X R ChangFull Text:PDF
GTID:2381330572476531Subject:Inorganic Chemistry
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Designing and synthesizing a variety of organic-inorganic hybrid materials with specific functions is a research focus in the field of material chemistry.The conditions of selecting the molar ratio of the reactants,the reaction temperature,the pH value,and the order of addition of the reactants,the structure directing agent et al will affect the structure and properties of the obtained hybrid material.The formation of functional organic-inorganic hybrid maternals by polyoxometallates and nitrogen-containing organic ligands is currently a research hotspot in this field.This article uses Keggin type tungsten phosphate {PW12} as the basic building unit,the transition metal ion?Ag?and the organic ligand H2biim were introduced into the {PW12}anion skeleton by hydrothermal synthesis method,and 4 new multi-dimensional structures were synthesized.Using Na2WO4·2H2O and Sb2O3 as raw materials and AgNO3 as a structure directing agent,the transition metal ion(Mn2+)and the organic ligand ethylenediaiine?en?were respectively introduced into the vacancy {SbW9}anion skeleton by hydrothermal synthesis.Two stable sandwich organic-inorganic hybrid complexes with multidimensional structure were designed and synthesized,and the influence of reaction conditions on the synthesis of the complex was discussed.The above hybrid materials were studied in detail by a series of testing techniques such as X-ray single crystal diffraction,photoelectrochemical characterization.,XRPD analysis,IR spectroscopy,TG curve analysis,solid UV-visible diffuse reflectance analysis and electrochemistry..In addition,the visible light photodegradation properties of the above complexes to the organic dye rhodamine B and the electrocatalytic reduction activity for H2O2 were also investigated.1'Using hydrothermal synthesis method,H3[PW12O40]·12H2O({PW12})was used as raw material,Ag/H2biim was introduced into {PW12} skeleton respectively,and 4 new organic-inorgannc hybrids were designed and synthesized.Object:[Ag?H2biim?)2])2[Ag4?H2biim?4][(PW12O40)2]?1?[Ag2?H2biim?2]3[(PW12O40)2·6H2O?2?[Ag?H3biim?2][PW12O40]-4H2O?3?[?H4biim?3][PW12O40?OH?3]·5H2O?4?2.Using hydrothermal synthesis method,Na2WO4·2H2O and Sb2O3 were used as raw materials,and AgNO3 was used as structure-directing agent to introduce Mn/en into {SbW9}skeleton respectively.Two novel sandwich-type complexes were designed and synthesized:?enH2?3H2{[Mn?en??H2O?]2?WO2?2(?-B-?SbW9O?33??2·3H2O?5??enH2?7[?WO4?4(?-B-SbW9O33)2]·10H2O?6?...
Keywords/Search Tags:Polyoxometallate, Nitrogen-containing organic ligand, Organic-inorganic hybridization, Crystal structure
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