Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Room-temperature water phase preparation method of bismuth sulfide nanospheres

A technology of nanospheres and bismuth sulfide, which is applied in the field of preparation of sulfide nanomaterials, can solve the problems of unfavorable late application, easy agglomeration into large pieces, and unstable product morphology, etc., and achieves short preparation cycle, simple preparation equipment and good shape. good looking effect

Inactive Publication Date: 2015-08-05
NANJING UNIV OF POSTS & TELECOMM
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly proposes a room temperature aqueous phase preparation method of bismuth sulfide nanospheres. The obtained bismuth sulfide nanospheres are uniform in size, and the preparation process is simple, the number of equipment is small, the preparation cycle is short, the energy consumption is low, the environment is friendly, and it is easy to popularize. Solve the technical problems in the prior art that require high temperature heating, and the shape of the obtained product is not fixed, easy to agglomerate into large pieces, which is not conducive to later application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Room-temperature water phase preparation method of bismuth sulfide nanospheres
  • Room-temperature water phase preparation method of bismuth sulfide nanospheres
  • Room-temperature water phase preparation method of bismuth sulfide nanospheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Add 4.5 mmol of mannitol to 45 mL (20 mg / mL) polyvinyl alcohol (PVA) aqueous solution, stir and dissolve at room temperature, add 0.5 mmol of bismuth nitrate pentahydrate particles, stir and dissolve at room temperature for 10 min, forming a solution containing bismuth ions;

[0028] Step 2: Slowly add 10 mL (75 mmol / L) thioacetamide solution dropwise into the bismuth ion solution, and stir for 5 min at room temperature to form a bismuth-sulfur mixture;

[0029] The third step: heat the bismuth-sulfur mixture in a water bath at 25°C for 2 h, then perform centrifugation, wash the black solid obtained by centrifugation with deionized water and ethanol three times in turn, and dry it in vacuum at 20°C for 12 h, Fabricated bismuth sulfide nanospheres.

Embodiment 2

[0031] Step 1: Add 0.5 mmol of bismuth nitrate pentahydrate particles to 45 mL (20 mg / mL) polyvinyl alcohol aqueous solution, stir and dissolve at room temperature for 10 min;

[0032] The second step: slowly drop 10 mL (75 mmol / L) thioacetamide solution into the above solution, and stir at room temperature for 5 min to form a bismuth-sulfur mixture.

[0033] The experimental results show that in the absence of a chelating agent, bismuth ions are easily hydrolyzed to form white insoluble precipitates, which cannot be followed by subsequent reactions.

Embodiment 3

[0035] Step 1: Add 2 mmol of nitrilotriacetic acid to 45 mL (20 mg / mL) polyvinyl alcohol aqueous solution, adjust the pH of the solution with sodium hydroxide solution until the solution is clear and transparent, add 0.5 mmol of bismuth nitrate pentahydrate Particles were stirred and dissolved at room temperature for 10 min to form a solution containing bismuth ions;

[0036] Step 2: Slowly add 10 mL (75 mmol / L) thioacetamide solution dropwise into the bismuth ion solution, and stir for 5 min at room temperature to form a bismuth-sulfur mixture;

[0037] The third step: heat the bismuth-sulfur mixture in a 25°C water bath for 8 h, and then perform centrifugation, wash the black solid obtained by centrifugation with deionized water and ethanol three times in turn, and dry it in vacuum at 20°C for 12 h, made bismuth sulfide nanomaterials.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a room-temperature water phase preparation method of bismuth sulfide nanospheres. A surfactant is dissolved in de-ionized water, then a chelating agent is added, next bismuth nitrate pentahydrate is added, the materials are stirred at room temperature, sulfur-containing solution is slowly dropwise added into bismuth iron solution, and the materials are uniformly mixed and then react for 2 h at room temperature to obtain the bismuth sulfide nanospheres. The bismuth sulfide nanometer material prepared by the method has good shape and uniform size, and has a potential application value in the fields such as thermoelectricity, electronics and photo-electronic devices; the method has the advantages of simple equipment, mild condition, low energy consumption, short preparation period and easiness in implementation and is an ideal method for preparing the bismuth sulfide nanometer material.

Description

technical field [0001] The invention relates to the field of preparation of sulfide nanomaterials, in particular to a method for preparing bismuth sulfide nanospheres in an aqueous phase at room temperature. Background technique [0002] Bismuth sulfide is an important semiconductor material with potential applications in thermoelectric, electronic and optoelectronic devices and infrared spectroscopy. Its forbidden band width is 1.2~1.7eV, which can be used to make photoelectric conversion materials and is widely used in many fields. Nano-scale bismuth sulfide can not only cause blue-shift of ultraviolet-visible absorption wavelength and fluorescence emission wavelength, but also produce nonlinear optical response, enhance the redox ability of nanoparticles, and also have excellent photoelectric catalytic performance. Linear optical materials, photocatalytic materials, etc. have broad application prospects. In recent years, it has also been found that nano-bismuth sulfide...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G29/00B82Y30/00
Inventor 沈清明樊晓慧范曲立黄维
Owner NANJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com