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Preparation method of bismuth tungstate and cadmium sulfide hybrid nanocrystals

A nanocrystalline, bismuth tungstate technology, applied in catalyst activation/preparation, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the difficulty of obtaining block copolymers and limit the wide range of polymer vesicles Application and other issues, to achieve the effect of improving photodegradation rate and repeated use

Active Publication Date: 2020-10-16
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wide application of polymersomes is limited due to the difficulty in obtaining suitable block copolymers.

Method used

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  • Preparation method of bismuth tungstate and cadmium sulfide hybrid nanocrystals
  • Preparation method of bismuth tungstate and cadmium sulfide hybrid nanocrystals
  • Preparation method of bismuth tungstate and cadmium sulfide hybrid nanocrystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Formation of polymersomes containing soluble salts:

[0028] At room temperature, the aqueous solution of the soluble bismuth nitrate salt of 25 grams of 1% mass concentration is added dropwise to the polystyrene block polyvinyl alcohol polymer (polymerization of polyvinyl alcohol) of 100 grams of 0.1% mass concentration according to the fixed rate of 0.25 g / min. Unit number is 100, polystyrene unit number is 200) dimethyl formamide is in the solution of solvent, then pulverizes under high-speed shearing machine; After 5 minutes, the temperature of the mixed solution is controlled at 10° C., and polymersomes containing soluble bismuth nitrate salt can be obtained.

[0029] According to the above method and ratio, soluble sodium tungstate, soluble cadmium nitrate and soluble sodium sulfide are used to replace soluble bismuth nitrate salt respectively, and finally four polymers containing soluble tungstate, soluble cadmium salt and soluble sulfide are formed respectiv...

Embodiment 2

[0035] (1) Formation of polymer vesicles containing soluble salts:

[0036]At room temperature, the aqueous solution of 25 grams of 3% mass concentration of soluble bismuth nitrate salt is added dropwise to 0.3% mass concentration according to a fixed rate of 0.25 g / min, polystyrene block polyvinyl alcohol polymer (the number of polymerized units of polyvinyl alcohol be 200, polystyrene unit number is 500) dimethyl formamide is in the solution 100 grams of solvent, pulverizes under high-speed shearing machine then; After 5 minutes, the temperature of the mixed solution is controlled at 10° C., and the polymer vesicles containing soluble bismuth nitrate salt can be obtained. According to the above method and formula, the soluble bismuth nitrate salt is replaced with soluble sodium tungstate salt, soluble cadmium sulfate salt and soluble sodium sulfide salt, respectively, and finally four kinds of salts containing soluble tungstate, soluble cadmium salt and soluble sulfide are f...

Embodiment 3

[0042] (1) Formation of polymer vesicles containing soluble salts:

[0043] At room temperature, the aqueous solution of 25 grams of 2% mass concentration of soluble bismuth nitrate salt is added dropwise to 0.2% mass concentration according to a fixed rate of 0.25 g / min, polymethyl methacrylate block polyvinyl alcohol polymer (polyvinyl alcohol Polymerized unit number is 150, polystyrene unit number is 400) dimethyl formamide is in the solution 100 grams of solvent, pulverizes under high-speed shearing machine then; The fixing time is 5 minutes, and the temperature of the mixed solution is controlled at 10° C. to obtain polymersomes containing soluble bismuth nitrate salt. According to the above method and formula, the soluble bismuth nitrate salt is replaced with soluble sodium tungstate salt, soluble cadmium sulfate salt and soluble sodium sulfide salt, respectively, and finally four kinds of salts containing soluble tungstate, soluble cadmium salt and soluble sulfide are f...

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Abstract

The invention relates to the fields of polymer materials, semiconductors, photocatalysis, photovoltaic industry and the like, in particular to a preparation method of bismuth tungstate and cadmium sulfide hybrid nanocrystals. The preparation method comprises the following steps: preparing four polymer vesicles containing soluble bismuth salt, soluble tungstate, soluble cadmium salt and soluble sulfide through an amphiphilic polymer, dispersing to form CdS / Bi2WO6 precursor polymer vesicles, and finally, carrying out heat treatment to obtain the hybrid nanocrystal containing clustered bismuth tungstate and acicular cadmium sulfide.

Description

technical field [0001] The invention relates to the fields of polymer materials, semiconductors, photocatalysis and photovoltaic industries, and in particular to the realization of clustered bismuth tungstate (Bi 2 WO 6 ) and acicular cadmium sulfide (CdS) hybrid nanocrystals. Background technique [0002] The consumption of traditional fossil energy has caused problems such as the greenhouse effect, environmental pollution, and energy shortage, which are major challenges facing mankind today. Some new multi-component photocatalytic materials have good photocatalytic performance under visible light. Among all the visible light-responsive photocatalysts that have been reported, Bi 2 WO 6 It is considered to be an excellent new photocatalyst, especially for the degradation of organic pollutants and has received extensive attention. On the other hand, in order to increase Bi 2 WO 6 Many researchers have done a lot of modification methods, including auxiliary catalysts, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J27/051B01J37/08B82Y30/00B82Y40/00C02F1/30C02F101/30C02F101/36C02F101/38
CPCB01J31/069B01J27/051B01J37/082B82Y30/00B82Y40/00C02F1/30C02F2101/30C02F2101/36C02F2101/38C02F2101/40C02F2101/308C02F2305/10B01J35/39Y02W10/37
Inventor 林永周张震乾刘芳丁建宁
Owner CHANGZHOU UNIV
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