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Method for preparing SnO2/Ag2O composite particles through electrostatic spinning method

A technology of composite particles and synthesis methods, which is applied in the direction of chemical instruments and methods, silver compounds, silver compounds, etc., can solve problems such as obvious differences, strong adjustability of microscopic morphology, difficulty in grasping synthesis process and technical indicators, etc., and achieve compositional Controllable, easy to control solution uniformity and stability, and conducive to large-scale production

Inactive Publication Date: 2018-07-27
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the electrospinning process is greatly affected by the precursor reaction system, spinning parameters, heat treatment parameters, etc., the microscopic morphology of the product is highly adjustable and the difference is obvious.
So far, no electrospinning method has been used to synthesize SnO at home and abroad. 2 / Ag 2 Related reports on O composite particles, its synthesis process and technical indicators are difficult to grasp

Method used

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  • Method for preparing SnO2/Ag2O composite particles through electrostatic spinning method
  • Method for preparing SnO2/Ag2O composite particles through electrostatic spinning method
  • Method for preparing SnO2/Ag2O composite particles through electrostatic spinning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1.1 Mix 0.5312 g of tin tetrachloride pentahydrate (SnCl 4 ∙5H 2 O), 0.0841 g of DDAB, 0.0181 g of acetamide, 0.0026 g of silver nitrate and 1.0000 g of PVP were added to a mixed solvent of 1.0 mL of ethanol and 4.0 mL of DMF, and stirred to obtain a transparent solution;

[0030] 1.2 The above solution was electrospun to obtain the precursor fiber, the spinning parameters were: positive voltage 18 KV, negative voltage 0.5 KV, receiving distance 16 cm, syringe advance speed 0.002 mm / s;

[0031] 1.3 Raise the temperature of the precursor fiber from room temperature to 600 °C at a rate of 1 °C / min, keep the temperature for 2 h, and obtain SnO after the sample is cooled with the furnace2 / Ag 2 O composite particles.

[0032] The XRD result of the product is as follows figure 1 As shown, it can be seen from the figure that all the stronger diffraction peaks are consistent with the standard XRD card (41-1445) and (41-1104), proving that the obtained product is tetragonal ...

Embodiment 2

[0034] 2.1 Add 0.1934 g of SnCl 4 ∙5H 2 O, the DDAB of 0.0689 g, the acetamide of 0.0092 g, the silver nitrate of 0.0051 g and the PVP of 0.4242 g were added in the mixed solvent of the ethanol of 1.0 mL and the DMF of 3.2 mL, stirred to obtain a transparent solution;

[0035] 2.2 The above solution was electrospun to obtain the precursor fiber, the spinning parameters were: positive voltage 16 KV, negative voltage 0.5 KV, receiving distance 19 cm, syringe advance speed 0.003 mm / s;

[0036] 2.3 The precursor fiber was raised from room temperature to 550 °C at a rate of 2 °C / min, and kept for 1 h. After the sample was cooled with the furnace, a spherical SnO with an average size of 0.08-0.1 μm was obtained. 2 / Ag 2 O composite particles.

Embodiment 3

[0038] 3.1 Add 0.7805 g of SnCl 4 ∙5H 2 O, the DDAB of 0.0618 g, the acetamide of 0.0159 g, the silver nitrate of 0.0113 g and the PVP of 1.3455 g were added in the mixed solvent of the ethanol of 1.0 mL and the DMF of 4.8 mL, stirred to obtain a transparent solution;

[0039] 3.2 The above solution was electrospun to obtain precursor fibers. The spinning parameters were: positive voltage 21 KV, negative voltage 0.5 KV, receiving distance 17 cm, and syringe advancing speed 0.001 mm / s;

[0040] 3.3 The precursor fiber was raised from room temperature to 700 °C at a heating rate of 3 °C / min, and kept for 6 h. After the sample was cooled with the furnace, a spherical SnO with an average size of 4.4-4.7 μm was obtained. 2 / Ag 2 O composite particles.

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Abstract

The invention provides a method for preparing SnO2 / Ag2O composite particles through an electrostatic spinning method and a prepared product. The method comprises the following steps of dissolving tinsalt, didodecyldimethylammonium bromide, acetamide, silver nitrate and polyvinylpyrrolidone into a mixed solvent of dimethyl formamide and ethanol, stirring till the obtained mixture turns transparent, so as to obtain a precursor spinning solution, after carrying out electrostatic spinning and heat treatment, obtaining a final product. Through designing a novel precursor solution composition, thecrystallization and the growth process of two kinds of oxides in the high temperature sintering process are effectively controlled, the quasi-spherical SnO2 / Ag2O composite particles with adjustable size are obtained and has remarkable distinction with one-dimensional materials obtained by a traditional electrostatic spinning method. The method provided by the invention is simple and convenient inoperation in the synthetic process, controllable in product appearance, good in uniformity and high in yield, the prepared SnO2 / Ag2O composite material has better application to the field of gas sensitive sensors.

Description

technical field [0001] The invention belongs to the field of material preparation and relates to a SnO 2 / Ag 2 Synthesis method of O composite particles, specifically related to an electrospinning method to prepare size-adjustable SnO 2 / Ag 2 O Composite particle method. Background technique [0002] The gas sensor is an important sensitive device that can sense the specific gas and its concentration in the environment. It uses the strength of the electrical signal to feedback the relevant information of the gas in the environment. With the rapid development of modern technology, gas-sensitive materials have played an irreplaceable role in environmental monitoring, green manufacturing, industrial equipment and other fields. Among them, semiconductor oxide gas-sensing materials have the advantages of fast response, high sensitivity, and reversible detection, and have attracted widespread attention. In order to better meet the detection needs of trace amounts of special g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02C01G5/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G5/00C01G19/02C01P2002/72C01P2002/85C01P2004/03C01P2004/32C01P2004/61C01P2004/62C01P2004/64C01P2004/82
Inventor 马谦李绘陈迎张爱玉曹永强王俊鹏车全德王刚杨萍
Owner UNIV OF JINAN
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