Hexagonal crystal tungsten bronze short rod nanoparticles and preparation method thereof

Abstract

The invention discloses a preparation method for preparing hexagonal tungsten bronze short rod nanoparticles MxWO3 with tungstate as the raw material, and belongs to the field of the nanometer technology and the field of energy conservation and environment protection. The method includes the steps of preparing high-specific-surface-area solid colloidal wolframic acid through a cation exchange method or a rapid acidification method, and synthesizing the hexagonal tungsten bronze short rod nanoparticles MxWO3 through a thermal reaction with the solid colloidal wolframic acid as the tungsten source, wherein the synthesized short rod nanoparticles are small in size and high in granularity uniformity, are in a short rod nanometer shape, have the advantages of being quite good in dispersibility and the like, and are particularly suitable for preparing a transparent thermal insulating coating and a thin film of the transparent thermal insulating coating. The visible light permeability and near infrared shielding / thermal insulating performance of the prepared powder can be further improved through nitrogen thermal treatment or reduction thermal treatment. The method is suitable for preparing the glass transparent thermal insulating coating and thermal insulating and heating compounds such as a thermal insulating thin film, a thermal insulating curtain, a solar thermal collector, a solar water heater coating, heating fiber, a thermal insulating and heat preservation plate and photothermal therapy.

Description

technical field [0001] The invention relates to a tungsten bronze nano-rod particle and a preparation method thereof, in particular to a hexagonal tungsten bronze nano-rod particle prepared by using cheap tungstate as a raw material and a method thereof. Background technique [0002] With the development of society and the improvement of productivity, people's demand for energy is increasing. Due to the large amount of polluted smoke and harmful gases produced in the process of energy consumption, various environmental problems such as greenhouse effect and acid rain will be caused. etc. are also receiving increasing attention from the whole society. Therefore, energy saving and consumption reduction are issues that must be considered in the sustainable economic development of all countries. The near-infrared light in the solar spectrum accounts for about 46%. In the energy consumption of many countries, building energy consumption accounts for about 30-40% of the national ...

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Problems solved by technology

However, most transparent heat-shielding particles still have various deficiencies, such as: the silver multilayer film is not stable in the air, and needs to be made into a multilayer film by expensive sputtering, resulting in a high price; antimony tin oxide (ATO) and indium tin oxide (ITO) have a small shielding range in the near-infrared band, and their shielding properties are poor in the wavelength range of 780-1200nm (Chinese Journal of Nonferrous Metals, 2008, 18(1); Journal of Composite Materials, 2013, 30(5)); and LaB 6 It not only absorbs infrared rays in the near-infrared band, but also absorbs electromagnetic waves in the visible light range, resulting in the color of the heat insulation film being too dark and the transparency greatly reduced.

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