Ethanol-sensitive zinc oxide- cobaltous oxide nano-hollow polyhedral film

• Main Authors: ZHU ZONGYE, XUE QINGZHONG, LU WENBO, DING DEGONG, XIONG YA
• Format: Patent
• Language: Chinese; English
• Published: 13.06.2017
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MEASURING; NANOTECHNOLOGY; PERFORMING OPERATIONS; PHYSICS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TESTING; TRANSPORTING

The invention provides a preparation method of a zinc oxide-cobaltous oxide nano-hollow polyhedral film for detecting ethanol, and belongs to the technical field of a gas sensor. Zinc nitrate hexahydrate and cobalt nitrate hexahydrate are mixed at a certain ratio, and a zinc oxide-cobaltous oxide precursor is prepared through a template method; then a zinc oxide-cobaltous oxide hollow polyhedron is acquired through heat treatment; a film appliance is prepared by a silk-screen printing method. In the mixing scale (the mole ratio of zinc oxide and cobaltous oxide is 0, 0.5 mol.%, 2 mol.%, and 4 mol.%), 2 mol.% is the best mixing. In the tested temperature scale (100-300 DEG C), the best working temperature is reduced to 200 DEG C as for 2 mol.% ZnO-CO3O4 and 4 mol.% ZnO-CO3O4. The sensitivity of the 2 mol.% ZnO-CO3O4 is up to 106 in relative to 1000 ppm ethanol under 200 DEG C; the response/recovery time is 7/236 seconds. The preparation method of the sensor is simple, the raw material cost is low, the material