The Study On The Systhesis Of The Intercalation Compounds With The K₄Nb₆O₁₇ As A Precursor

Nowadays, growing attention has been paid to the issue of energy. People are exploiting plenty of energies such as coal mining, oil, natural gas, etc. These energy sources will be exhausted in the near future. Thus finding new energy sources is the important task now. It can produce much energy when hydrogen is burned, and the water which is no hurt to the environment is the final product. So hydrogen is considered as the green energy source and become the best energy source. However, how to produce hydrogen conveniently is still a great challenge at present. Many scientists are trying to explore a variety of highly efficient catalysts. They hope to split the water into hydrogen and oxygen with solar energy by using these catalysts. The layered compounds caused more attentions of the scientists due to the interesting structures. Some compositions can be intercalated into the interlayered spaces of the layered compounds with some special methods, by which the width of the forbidden band is changed to nearly 1.23 ev, and these compounds can be used as the catalysts in the water spitting with visible light.In the layered compounds, niobium oxides and titanium oxides are paid more attentions by many researchers. K4Nb6O17 is a two-dimensional layered material built with NbO6 octahedrons. The lattice parameters of K4Nb5O17 are:a=0.783 nm, b= 3.321 nm, c=0.646 nm. In this thesis, by using K4Nb6O17 as the precursor, through ion-exchange, exfoliation, intercalation, etc, some intercalation compounds have been synthesized. The synthesis conditions of the compounds have been investigated, and the characterization of the compounds have been produced.The layered compound NiNbO has been hydrothermally synthesized with K4Nb6O17 as a precursor. Its chemical formula is [Ni(OH)o.68]1.55K1.95Nb6O17·5.82H2O. This compound is orthogonal, and the lattice parameters are:a=0.3442 nm, b= 1.0943 nm,c.0.4341 nm,α=β=γ=90°.The layered compound CuNbO has been hydrothermally synthesized with K4Nb6017 as a precursor.Its chemical formula is [Cu(OH)0.66]1.53K1.95Nb6017·8.31H2O. This compound is orthogonal,and the lattice parameters are:a=0.5251 nm,b= 1.0707 nm,c=0.6302 nm,α=β=γ=90°。...