Preparation method for zirconium molybdate ultra-thin nanosheets controlled by structure-directing agent

Abstract

The invention provides a method for controllable synthesis for zirconium molybdate ultra-thin nanosheets by microwave radiation method with the assistance of a structure-directing agent, wherein during experimental process, a zirconium molybdate sheet-shaped two-dimensional nanometre material is controllably prepared under the action of a microwave field by using zirconium nitrate and ammonium molybdate as raw materials, using polyethylene glycol as a surfactant, and using distilled water as a solvent. Test indicates that the ultra-thin nanosheets are 60 to 90 nanometres in thickness and 3 to 6 microns in diameter. The utilized microwave radiation method with the assistance of polyethylene glycol has the advantages of being obvious in structure-directing action on product, without the phenomenon of temperature lag, adjustable in the heating power of reaction system, simple in preparation process etc; and the zirconium molybdate material prepared by utilizing the process is expected to act promotion action on the booming of the application field thereof.

Description

technical field [0001] The patent of the invention belongs to the field of preparation of inorganic functional materials, especially a preparation method of ultra-thin zirconium molybdate nanosheets controlled by a structure-directing agent technical background [0002] Structure-directing agent-induced growth of nanomaterials paves the way for novel material morphology diversification. As a typical representative of structure-directing agents, polyethylene glycol is a non-ionic surfactant that does not dissociate in water systems, has good stability, good surface wetting effect, good compatibility in solvents and no Poison harmless and other advantages. In the chemical synthesis system, polyethylene glycol can induce crystal growth along a specific direction according to the surface structure of the target product, thereby controlling the microscopic morphology and size of the material. [0003] Metal molybdates are widely used in the fields of fluorescence, photocatalysi...

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Problems solved by technology

[0004] At present, the preparation methods of metal molybdate micro / nano materials mainly include solid phase synthesis, ultrasonic synthesis, water (solvent) thermal synthesis and microwave radiation method (Y.Sun, C.S.Li, W.J Zheng.Cryst.Growth Des.2010, 10, 262; Y.Sun, Wenjun Zheng.Dalton Trans., 2010, 39, 7098-7103; J.F.Liu, Y.D.Li, Adv.Mater.2007, 19, 1118; A.W.Xu, Y.P.Fang, et al. al.J.Am.Chem.Soc.2003, 125, 1494; Y.Takita, K.Kikitani, C.Xia, H.Takami and K.Nagaoka.Appl.Catal., A, 2005, 283, 209-216 ;) However, there are relatively few documents related to the preparation technology of zirconium molybdate micro-nano materials, especially for the controllable preparation of zirconium molybdate ultrathin nanosheets. The main reason is that the reactants in the traditional synthesis system The early nucleation of the material is fast, and the growth direction is difficult to guide, which restricts the vigorous development of this kind of functional materials to a large extent.

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