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Preparation method of N-substituted carboxyl polyaniline/cadmium sulfide quantum dot composite material

A composite material and polyaniline technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of poor separation effect of electrons and holes, large interface distance, low product purity, etc., and achieve easy agglomeration and extremely easy photocorrosion The effect of defect improvement, interfacial force strengthening, and high cycle stability

Inactive Publication Date: 2016-09-28
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the composite materials prepared by these methods have a large interfacial distance due to the weak force between different components, and the separation effect of electrons and holes is poor, and the purity of the product is not high, and the photocorrosion resistance is poor.
In order to promote the rapid movement of electrons between the two materials, and at the same time improve the defect that cadmium sulfide is prone to photocorrosion under visible light, a common improvement method is to form a core-shell structure of cadmium sulfide and polyaniline, and wrap cadmium sulfide quantum dots It is used as a protective layer in organic conductive polyaniline, but this method will reduce the light conversion efficiency and cycle stability of cadmium sulfide

Method used

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  • Preparation method of N-substituted carboxyl polyaniline/cadmium sulfide quantum dot composite material
  • Preparation method of N-substituted carboxyl polyaniline/cadmium sulfide quantum dot composite material
  • Preparation method of N-substituted carboxyl polyaniline/cadmium sulfide quantum dot composite material

Examples

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Embodiment 1

[0044] This example will illustrate the method of the present invention to generate a cadmium-containing precursor by in-situ polymerization with a molar ratio of N-phenylglycine and cadmium acetate of 1:2, and then in an ice-water bath, use the cadmium precursor and sodium sulfide nonahydrate The molar ratio is 1:1, the reaction time is 2h, and it is realized according to the reaction path of two-step synthesis.

[0045] Weigh 0.756g of N-phenylglycine and 2.66g of cadmium acetate and dissolve in 40ml of HCl solution with a concentration of 1M, and ultrasonicate for 30min until the mixed solution is dispersed to form a homogeneous solution, labeled as A; weigh 1.427g of ammonium persulfate and dissolve in In 60ml of HCl solution with a concentration of 1M, ultrasonically disperse for 5 minutes to form a uniform solution, labeled as B; in an ice-water bath, keep liquid A continuously stirring, slowly drop liquid B into liquid A, react for 6 hours, and then Leave it for 18 hour...

Embodiment 2

[0049] This example will illustrate that the molar ratio of N-phenylglycine and cadmium acetate is 1:2 in the method of the present invention to generate a cadmium-containing precursor through in-situ polymerization, and then in an ice-water bath, the cadmium precursor and nonahydrate sulfide The sodium molar ratio is 1:0.5, the reaction time is 2h, and the reaction path of the two-step synthesis is realized.

[0050]Weigh 0.756g of N-phenylglycine and 2.66g of cadmium acetate and dissolve in 40ml of HCl solution with a concentration of 1M, and ultrasonicate for 30min until the mixed solution is dispersed to form a homogeneous solution, labeled as A; weigh 1.427g of ammonium persulfate and dissolve in In 60ml of HCl solution with a concentration of 1M, ultrasonically disperse for 5 minutes to form a uniform solution, labeled as B; in an ice-water bath, keep liquid A continuously stirring, slowly drop liquid B into liquid A, react for 6 hours, and then Leave it for 18 hours, af...

Embodiment 3

[0053] This example will illustrate that the molar ratio of N-phenylglycine and cadmium acetate is 1:2, and the cadmium-containing precursor is generated by in-situ polymerization, and then in an ice-water bath, the molar ratio of cadmium acetate and sodium sulfide nonahydrate is The ratio is 1:1, the reaction time is 0.5h, and it is realized according to the reaction path of two-step synthesis.

[0054] Weigh 0.756g of N-phenylglycine and 2.66g of cadmium acetate and dissolve in 40ml of HCl solution with a concentration of 1M, and ultrasonicate for 30min until the mixed solution is dispersed to form a homogeneous solution, labeled as A; weigh 1.427g of ammonium persulfate and dissolve in In 60ml of HCl solution with a concentration of 1M, ultrasonically disperse for 5 minutes to form a uniform solution, labeled as B; in an ice-water bath, keep liquid A continuously stirring, slowly drop liquid B into liquid A, react for 6 hours, and then Leave it for 18 hours, after the react...

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Abstract

The invention relates to a preparation method of an N-substituted carboxyl polyaniline grafted cadmium sulfide quantum dot composite material. The method takes N-phenyl glycine as a monomer, and comprises the steps of introducing a cadmium source into an in-situ polymerization system of the N-phenyl glycine so as to generate a cadmium-containing precursor; then introducing a sulfur source to prepare the chemically grafted N-substituted carboxyl polyaniline cadmium sulfide quantum dot composite material by utilizing a mechanism of nucleation between cadmium and sulfur. The electron transport rate of the composite material prepared by the method is much higher than that of cadmium sulfide and polyaniline, the photo-corrosion resistance of the cadmium sulfide is improved, the composite material is capable of carrying out photovoltaic conversion and treating organic dye by means of photocatalytic degradation under visible light, and the dissolving property and stability of the material are improved. The obtained composite material can be applied to the fields such as photocatalysts, sensors and solar cells.

Description

technical field [0001] The invention relates to a preparation method of an N-substituted carboxyl polyaniline / cadmium sulfide quantum dot composite material, which belongs to the technical field of conductive polymer materials. Background technique [0002] Energy shortage and environmental pollution are the most urgent problems facing today. All countries in the world are looking for an emerging industry that can effectively deal with the energy crisis, relieve environmental pressure, develop a low-carbon economy, and achieve sustainable development. Due to its cleanliness, safety, convenience, and high efficiency, solar photovoltaics are flourishing all over the world, and are known as a sunrise industry that welcomes the arrival of the new energy era. At the same time, with the gradual maturity of organic solar cells and photocatalytic degradation technologies, the preparation of photoactive materials by polymer composite semiconductor quantum dots has become more and mor...

Claims

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Application Information

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IPC IPC(8): C08G73/02C09K11/56
CPCC08G73/0266C09K11/565
Inventor 章家立杨标宋琦郭赞如程光尤鸿蒲周帅丰
Owner EAST CHINA JIAOTONG UNIVERSITY
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