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Synthetic method and application of SnO2 hollow nanospheres

A hollow sphere and nanotechnology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as the complexity of high-cost sensors, and achieve low cost, simple operation, and strong viscosity Effect

Inactive Publication Date: 2013-04-24
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods often lead to some other problems like high cost and complexity of sensor fabrication

Method used

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  • Synthetic method and application of SnO2 hollow nanospheres
  • Synthetic method and application of SnO2 hollow nanospheres
  • Synthetic method and application of SnO2 hollow nanospheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve 10 g of starch in 150 mL of deionized water at 50°C, then transfer the solution to a 150 mL Teflon reactor at 210°C for 4 h, then centrifuge it at 12,000 rpm for 20 min to obtain a black precipitate After drying at 60°C for 15 h, 3.6 g of dry matter was obtained for future use.

[0026] Take 1.8 g of the obtained dry matter, add 50 mL of anhydrous propanol, and carry out ultrasonic treatment on the solution at 40°C, using an ultrasonic wave with an ultrasonic frequency of 40KHZ, an ultrasonic power of 100W, and a heating power of 800W, and the processing time is 40 minutes. , to obtain a carbon microsphere solution.

[0027] Add 8.5 g SnCl to the carbon microsphere solution 4 ·5H 2 0. After mixing evenly, use an ultrasonic wave with an ultrasonic frequency of 50KHZ, an ultrasonic power of 200W, and a heating power of 800W, and continue ultrasonic treatment for 1.5 h to obtain a mixed solution.

[0028] After repeated washing with propanol and deionized water...

Embodiment 2

[0031] Dissolve 20 g of starch in 200 mL of deionized water at 50 °C, then transfer the solution to a 200 mL Teflon reactor at 210 °C for 4 h, then centrifuge it at 12000 rpm for 20 min to obtain a black precipitate After drying at 60°C for 15 h, 8.5 g of dry matter was obtained for future use.

[0032]Take 2.0 g of the obtained dry matter, add 60 mL of anhydrous propanol, and carry out ultrasonic treatment on the solution at 40°C, using an ultrasonic wave with an ultrasonic frequency of 40KHZ, an ultrasonic power of 100W, and a heating power of 800W, and the processing time is 40 minutes. , to obtain a carbon microsphere solution.

[0033] Add 9.0 g SnCl to the carbon microsphere solution 4 ·5H 2 0. After mixing evenly, use an ultrasonic wave with an ultrasonic frequency of 50KHZ, an ultrasonic power of 200W, and a heating power of 800W, and continue ultrasonic treatment for 1.5 h to obtain a mixed solution.

[0034] After repeated washing with propanol and deionized water...

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Abstract

The SnO2 hollow nanospheres are prepared by carbonizing treatment, carbon microsphere manufacture, mixing, SnO2 hollow nanosphere manufacture and other steps. The manufactured hollow nanosphere has higher viscosity, and more hollow nanospheres are connected; the sensor manufactured by the hollow nanospheres prepared by the method has higher sensitivity, faster response time and faster recovery time; and the obtained hollow nanosphere material is larger in quantity, lower in cost, simpler to operate and convenient for factory production.

Description

technical field [0001] The invention belongs to the field of nanomaterials and applications thereof, and relates to a synthesis method of nanomaterials, in particular to a SnO 2 Synthesis method and application of nano hollow spheres. Background technique [0002] SnO 2 It is a widely used semiconductor material. with SnO 2 The gas sensor made of nano-materials is characterized by high sensitivity and low working temperature, and is widely used in the detection and prediction of industrial waste gas, environmental pollution gas, various combustible gases and other harmful gases; at the same time, SnO 2 It is also one of the basic materials for the preparation of humidity-sensitive sensors. As a humidity-sensitive material, it has a wide range of uses in material storage, improvement of indoor environment, precision instrument equipment room, art galleries, libraries, museums and other places; as a pressure-sensitive material, SnO 2 It is a new type of varistor material ...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82Y30/00B82Y40/00G01N27/12
Inventor 谭玉任文辉林智群杨学工
Owner HUNAN AGRICULTURAL UNIV
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