Application of semiconductor oxide ultrafine nanoparticles in cataluminescence sensor, and preparation method of semiconductor oxide ultrafine nanoparticles

The invention discloses application of semiconductor oxide ultrafine nanoparticles in a cataluminescence sensor, and a preparation method of the semiconductor oxide ultrafine nanoparticles. The invention is characterized in that the ultrafine nanoparticles are tin dioxide deposited on calcined carbon nanotubes, and are used as a catalyst for generating nano surface cataluminescence for carbon monoxide, and the particle sizes are 4-7nm. The preparation method comprises the following steps: (1) adding 200ml of 25-30% nitric acid solution into a 500ml round bottom flask containing 2-5g of carbon nanotubes, putting the 500ml round bottom flask into an aluminum pot containing silicone oil, continuously stirring, heating under reflux at 120-140 DEG C for 24 hours, centrifugalizing to remove the nitric acid solution, dropwisely adding 5-10g of SnCl2.2H2O, and carrying out ultrasonic treatment for 1-3 hours; while quickly stirring, slowly adding a strong ammonia water solution until the pH value reaches 8-9, and drying at 60-90 DEG C for 2-3 hours; and heating to 480-550 DEG C in the air, introducing an inert gas, keeping the temperature for 0.5-1 hour, continuing heating to 740-760 DEG C, keeping the temperature in the air for 0.5 hour, and cooling to room temperature, thereby obtaining the product ultrafine tin dioxide nanoparticles.