Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing tin dioxide quantal-point

A technology of tin dioxide and quantum dots, which is applied in the fields of tin oxide, nanostructure manufacturing, semiconductor/solid-state device manufacturing, etc., and can solve problems such as quantum dots that have not been reported by anyone

Inactive Publication Date: 2008-05-07
ZHEJIANG SCI-TECH UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hydrothermal method is widely used in SnO 2 synthesis of nanostructures, but so far, no one has reported the use of hydrothermal methods to achieve SnO 2 Synthesis of quantum dots

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
  • Method for preparing tin dioxide quantal-point
  • Method for preparing tin dioxide quantal-point

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 2.2400 grams of tin tetrachloride (SnCl 4 ·5H 2 O, 0.0064 mole) is put into 160 milliliters of deionized water, then adds 1.2800 grams of hydrazine hydrate (N 2 h 4 ·H 2 (2, 0.0256 mol), after stirring for 10 minutes, put the above-mentioned prepared solution into the polytetrafluoroethylene lining of the autoclave, the lining volume is 200 milliliters, that is, the filling degree is 80%. The solution was treated at 150°C for 10 hours, and the treated solution was centrifuged and dried to obtain SnO 2 quantum dots. figure 1 is SnO 2 XRD pattern of quantum dots, with SnO 2 The standard card (JCPDS 77-0452) is completely consistent, indicating that the product is pure SnO 2 . figure 2 a is SnO 2 Transmission electron microscope photos and electron diffraction patterns of quantum dots, figure 2 b is their high-resolution photo, from figure 2 a and figure 2 In b, it can be seen that the obtained product is a nanoparticle of 2.3-3.1 nanometers.

Embodiment 2

[0016] 2.2400 grams of tin chloride (SnCl 4 ·5H 2 O, 0.0064 mole) is put into 180 milliliters of deionized water, then adds 1.9200 grams of hydrazine hydrate (N 2 h 4 ·H 2 (2, 0.0390 mole), after stirring for 20 minutes, put the above-mentioned prepared solution into the polytetrafluoroethylene lining of the autoclave, the lining volume is 200 milliliters, that is, the filling degree is 90%. The solution was treated at 200°C for 30 hours, and the treated solution was centrifuged and dried to obtain SnO 2 quantum dots.

Embodiment 3

[0018] 2.2400 grams of tin chloride (SnCl 4 ·5H 2 O, 0.0064 mole) is put into 160 milliliters of deionized water, then adds 2.5600 grams of hydrazine hydrate (N 2 h 4 ·H 2 (0,0.0512 moles), after stirring for 30 minutes, put the above-mentioned prepared solution into the polytetrafluoroethylene lining of the autoclave, the lining volume is 200 milliliters, that is, the filling degree is 80%. The solution was treated at 250°C for 50 hours, and the treated solution was centrifuged and dried to obtain SnO 2 quantum dots.

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
radiusaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

This invention discloses a tin dioxide quanta point preparation method. Butter of tin is filled into deionized water, then hydrazine hydrate that mol number is 4-8 times to butter of tin is added, and at that time white pulpiness precipitation is generated, that is coordination compound formed by hydrazine hydrate and butter of tin, after 10-30 minutes, water solution made is filled into high pressure tank, compactedness is 80-90%, processing temperature is 150-250 degrees centigrade, processing time is 1-50 hours, then the solution after processing is centrifuged and dried, finally Sn02 quanta point is got. In this invention hydrazine hydrate replaces sodium-hydroxide or ammonia water, the hydrazine hydrate and SnC14 form coordination compound cluster, the cluster is very little, and the whole Sn02 hydrothermal synthesis process is restricted in the cluster. The chemical medicine in this invention is low price, there is no need of any complexing agent or surface activator. This invention is simple, low cost, so it is propitious to big scale production.

Description

technical field [0001] The invention relates to a preparation method of tin dioxide quantum dots. Background technique [0002] When the size of nanomaterials is reduced to a certain extent, there is an obvious quantum size effect, and the electronic energy level near the Fermi level changes from quasi-continuous to discrete energy levels, and at the same time its energy gap widens, and thus The optical, magnetic, thermal, electrical, and catalytic properties of nanomaterials are significantly different from those of bulk materials (P.M.Petroff et al.Phys.Today, 54, 46(2001)). As far as semiconductor materials are concerned, when the size is smaller than or equivalent to its own exciton Bohr radius, it will show obvious quantum effects. When the size of semiconductor nanoparticles in three dimensions is smaller than its excitonic Bohr radius, the nanoparticles are called quantum dots, which have a wide range of applications in important fields such as electronics, optoelect...

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): H01L21/18C01G19/02B82B3/00
Inventor 祝洪良于桂霞姚奎鸿
Owner ZHEJIANG SCI-TECH UNIV