Electroductive AZO@TiO2 whisker is a conductive material with good conductivity,high whiteness and low price.At present,the preparation of this electroductive whisker is by coprecipitation method.However,the preparation of this material is difficult to achieve uniform doping of zinc and aluminum,and the pH value is difficult to control under near-neutral reaction conditions.The electroductive AZO@TiO2 whisker was prepared by using metal chelation,aluminum chloride and zinc chloride as raw material and acetylacetone as chelating agent.Metal chloride and acetylacetone was dissolved in ethanol solution,and formed a stable precursor solution.Then a layer of AZO conductive film was coated on the surface of TiO2 through hydrolysis and calcination.The effects of coating ratio,doping ratio,acetylacetone ratio and annealing temperature on whisker conductivity were investigated by single factor test.Furthermore,four factors and three levels of orthogonal test were designed to further optimize the process parameters.Samples were characterized by X-Ray diffraction (XRD),scanning electronic microscopy (SEM),energy dispersive spectrometer (EDS),transmission electron microscope (TEM) and thermogravimetric analysis (TGA).The results showed that the AZO@TiO2 had a lowest resistivity of 0.318kΩ·cm.
Xu Ziao, Zhu Yanan, Ge Mingqiao
. Preparation and property of electroductive AZO@TiO2 whisker by metal chelation[J]. New Chemical Materials, 2021
, 49(2)
: 107
-112
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.02.025
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