Supercharge Your Innovation With Domain-Expert AI Agents!

Preparation method of titanium dioxide nanowire-lead sulfide quantum dot composite material

A technology of titanium dioxide and composite materials, applied in the direction of titanium dioxide, titanium oxide/hydroxide, lead sulfide, etc., can solve the problems of difficult control, rapid change of deposition amount, limited amount of titanium dioxide, etc., achieve simple preparation process and improve sunlight conversion efficiency effect

Inactive Publication Date: 2015-01-21
TIANJIN UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the danger of high voltage in the laboratory process, the amount of titanium dioxide prepared by anodic oxidation is limited; and when depositing lead sulfide, the deposition amount of electrochemical deposition changes rapidly and is difficult to control, which also limits its 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
  • Preparation method of titanium dioxide nanowire-lead sulfide quantum dot composite material
  • Preparation method of titanium dioxide nanowire-lead sulfide quantum dot composite material
  • Preparation method of titanium dioxide nanowire-lead sulfide quantum dot composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Prepare 80 mL of NaOH solution with a concentration of 10 mol / L; weigh 2 g of P25 powder, add it to the NaOH solution, sonicate for 30 min, stir for 30 min, and mix the solution evenly; then transfer the prepared solution to the hydrothermal reaction placed in an oven and reacted at 200 °C for 24 h; after the hydrothermal reaction, the product in the reactor was washed with deionized water to neutrality, and the product was stirred and pickled in 0.1M hydrochloric acid solution for 5 h, and then The product was washed with deionized water until neutral, dried in air, and finally the product was calcined at 5 °C / min to 500 °C for 3 h to obtain titanium dioxide nanowires.

[0019] Weigh 0.2780 g of PbCl 2 and 0.16 g of S powder were added to 5 mL and 10 mL of oleylamine respectively, argon was passed for 10 min, and then vacuum was pumped for 10 min, and argon and vacuum were carried out four times in sequence. Heated to 90 °C for 1 h, and then the 2 Inject the oleylami...

Embodiment 2

[0023] The procedure of this example is the same as that of Example 1, except that in the process of preparing titanium dioxide nanowires, the amount of P25 was changed from 2 g to 1.5 g; the temperature of hydrothermal was changed from 200 °C to 180 °C, The reaction time was changed from 24 h to 48 h. The titania nanowires produced were unchanged.

Embodiment 3

[0025] This example is the same as Example 1, except that the reaction temperature is changed from 90°C to 120°C when preparing lead sulfide quantum dots; during the composite process of titanium dioxide nanowires and lead sulfide quantum dots, The amount of thread changed from 10 mg to 5 mg.

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 preparation method of a titanium dioxide nanowire-lead sulfide quantum dot composite material. The method comprises the following steps: adding P25 granules into a NaOH solution, carrying out hydrothermal reaction, washing, drying and calcining to obtain titanium dioxide nanowires; respectively dissolving PbCl2 and S in oleylamine to obtain a Pb precursor solution and a S precursor solution, mixing the Pb precursor solution and S precursor solution, quenching, and purifying to obtain lead sulfide quantum dots; mixing the toluene-oleylamine mixed solution of titanium dioxide nanowires and the toluene solution of lead sulfide quantum dots, centrifuging, taking the precipitate, and dispersing in toluene to obtain the titanium dioxide nanowire-lead sulfide quantum dot composite material. The preparation technique is simple; the lead sulfide quantum dots in the prepared composite material are uniformly dispersed on the titanium dioxide nanowires, so that the spectral response range of the titanium dioxide is widened to the visible light and near infrared regions, thereby enhancing the solar conversion efficiency of the composite material.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide nanowire and lead sulfide quantum dot composite material, belonging to the technical field of titanium dioxide nanocomposite materials. Background technique [0002] Energy shortage and environmental degradation have become two key issues restricting the sustainable development of human society. As a green and clean renewable energy, solar energy has attracted increasing attention. Titanium dioxide has the advantages of low manufacturing cost, non-toxic, non-polluting, and good chemical stability, and has been widely used, for example, in solar cells, photocatalytic water splitting to produce hydrogen, gas sensors, and biological sterilization. However, titanium dioxide as a wide bandgap semiconductor (bandgap width E g=3.1 eV), it can only have photoresponse in the ultraviolet region, and the overall sunlight utilization efficiency is low. Usually, when it is used as a photoelectri...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/08C01G21/21B82Y30/00B82Y40/00C09K11/66
Inventor 王德法韩暐师春生仝华赵乃勤叶金花
Owner TIANJIN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com