The invention provides 
tin-doped layered porous nanometer 
zinc oxide. The 
tin-doped layered porous nanometer 
zinc oxide is characterized in that the 
tin-doped layered porous nanometer 
zinc oxide is of a three-dimensional porous 
layered structure formed by 
crystal particles and nanopores on the whole, the thickness of each layer of tin-doped layered porous nanometer zinc oxide is about 10-20nm, the length of each layer of tin-doped layered porous nanometer zinc oxide is about 0.8-1.2 micrometers, the width of each layer of tin-doped layered porous nanometer zinc oxide is about 300-700nm, and the 
tin doping content is 0.1-22.0at.%. A typical preparation method of the tin-doped layered porous nanometer zinc oxide comprises the steps of weighing zinc salt, dissolving the zinc salt by adding water, adding stannous 
chloride according to proportions, stirring so as to form white 
emulsion, slowly adding polyhydric alcohols (such as 
ethylene glycol, 
glycerol, 1,2-
propylene glycol, 1,4-
butanediol) till forming semitransparent 
light white mixed liquid, transferring the mixed liquid to a reaction kettle, sealing the reaction kettle, carrying out 
thermal reaction by adding hot water, then carrying out 
solid-liquid separation on a 
reaction product after the reaction, and washing and 
drying the 
solid product. The tin-doped layered porous nanometer zinc oxide provided by the invention has excellent gas-sensitive property for volatile organic compounds, and has the advantages of simple method and low cost.