▎ 摘　　要

NOVELTY - Preparing Schottky explosive atmosphere sensing material involves utilizing Schottky junction of silicon-zinc oxide core-shell nanowire array and top graphene electrode of nanowire array. The silicon nanowire arrays are prepared by conventional chemical etching method. The solution of 0.005 mole/l zinc acetate is prepared in anhydrous ethanol and the solution is dropwise added to the silicon nanowires and dried with nitrogen. The product is annealed at 350 degrees C for 0.5 hours to obtain zinc oxide nanowire array. USE - Method for preparing Schottky explosive atmosphere sensing material used for detecting the presence of trinitrotoluene, dinitrotoluene, p-nitrotoluene, picric acid, xanthin, urea, black powder and ammonium nitrate in an explosive atmosphere (claimed). ADVANTAGE - The method enables to prepare Schottky explosive atmosphere sensing material that has a good response, good response time and shorter recovery time which is 5 seconds or less. DETAILED DESCRIPTION - Preparing Schottky explosive atmosphere sensing material involves utilizing Schottky junction of silicon-zinc oxide core-shell nanowire array and top graphene electrode of nanowire array. The silicon nanowire arrays are prepared by conventional chemical etching method. The solution of 0.005 mole/l zinc acetate is prepared in anhydrous ethanol and the solution is dropwise added to the silicon nanowires and dried with nitrogen. The product is annealed at 350 degrees C for 0.5 hours to obtain zinc oxide nanowire array. The volume of 125 ml zinc acetate with a concentration of 0.001-0.05 mole/l of methanol solution and 65 ml of methanol solution with a concentration of 0.003-0.15 mole/l of potassium hydroxide are respectively arranged. The potassium hydroxide solution is added dropwise to acetic acid and the zinc oxide seed crystal silicon nanowire array is modified. The mixed solution is reacted at the temperature of 50-80 degrees C for 2 hours to obtain the silicon-zinc oxide core shell nanowire arrays. The graphene obtained by wet chemical method or vapor deposition method is transferred to the apex of silicon-zinc oxide core-shell nanowire array by using polymethyl methacrylate assisted graphene transfer method. The mixture is annealed at 300-500 degrees C for 2-4 hours in nitrogen atmosphere to obtain silicon-zinc oxide core-shell nanowire array or graphene Schottky junction explosive atmosphere sensing material.