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

An ultra-fine nano, oxide technology, applied in chemical instruments and methods, chemiluminescence/bioluminescence, luminescent materials, etc., can solve problems such as low catalytic luminescence efficiency, achieve rapid signal response time, sufficient contact, and increase specific surface area. Effect

Inactive Publication Date: 2013-11-13
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalytic luminescence efficiency of nanomaterials with ordinary shapes is relatively low, and the phenomenon and mechanism of catalytic luminescence of nanomaterials with special shapes need to be further studied and explored.

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0025] Present embodiment 1 carries out as follows:

[0026] 1. Put 200mL of the newly prepared 30% nitric acid solution into a 500ml round bottom flask filled with 5g of carbon nanotubes, place it in an aluminum pot filled with silicone oil, and heat it under reflux at 135°C for 24 hours under continuous magnetic stirring. Hour;

[0027] 2. Centrifuge the carbon nanotubes after activation, remove the nitric acid solution, and dissolve 5g SnCl 2 2H 2 O was added to the acidified carbon nanotube environment, and the prepared reaction system was ultrasonically treated at room temperature for 2 hours;

[0028] 3. Under rapid stirring conditions, slowly add the concentrated ammonia solution dropwise into the ultrasonically treated system until the pH value = 8 to obtain the precursor, and dry the precursor at 90°C for 3 hours;

[0029] 4. Raise the temperature of the precursor to 500°C in the air, then pass in an inert gas, and keep the temperature in the inert gas for 0.5 hour...

Embodiment 2

[0032] Present embodiment 2 carries out as follows:

[0033] 1. Add 200mL of the newly prepared 25% nitric acid solution into a 500ml round bottom flask filled with 3g of carbon nanotubes, place it in an aluminum pot filled with silicone oil, and heat it under reflux at 125°C for 24 hours under continuous magnetic stirring. Hour;

[0034] 2. Centrifuge the carbon nanotubes after activation, remove the nitric acid solution, and dissolve 6g SnCl 2 2H 2 O was added to the acidified carbon nanotube environment, and the prepared reaction system was ultrasonically treated at room temperature for 3 hours;

[0035] 3. Under rapid stirring conditions, slowly add the concentrated ammonia solution dropwise into the ultrasonically treated system until the pH value = 9 to obtain the precursor, and dry the precursor at 80°C for 3 hours;

[0036] 4. Raise the temperature of the precursor to 520°C in the air, then pass in an inert gas, and keep the temperature in the inert gas for 1 hour, ...

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Abstract

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 methanol and / or 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.

Description

technical field [0001] The invention relates to the application of semiconductor oxide ultrafine nanoparticles in catalytic luminescent sensors and a preparation method thereof. Background technique [0002] Catalytic luminescence on the surface of nanomaterials has received extensive attention. Catalytic luminescence refers to the phenomenon that light quanta are emitted when the excited state product produced during the catalytic reaction returns to the ground state. In 1976, Breysse et al. in ThO 2 The catalytic luminescence phenomenon was first observed during the catalytic oxidation of surface CO, and then McCord, Konig et al. also found this catalytic luminescence phenomenon in different chemical reaction processes, and Nakagawa et al. 2 o 3 chemiluminescence phenomenon. Zhang Xinrong et al. found that nanomaterials can significantly catalyze the chemiluminescence of gas-solid surfaces, and ethanol in nano-TiO 2 The phenomenon of catalytic luminescence on the surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/66G01N21/76
Inventor 刘名扬郭祯于丽华
Owner DALIAN JIAOTONG UNIVERSITY
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