A kind of Snse quantum dot/r-go complex and its preparation method and application
A technology of quantum dots and composites, applied in structural parts, electrical components, battery electrodes, etc., can solve problems such as complicated processes, no memory effect of batteries, and pollution of the environment, achieve great research value, improve electrochemical performance, reaction low temperature effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0028] The preparation method of SnSe quantum dot / r-GO composite of the present invention comprises the following steps:
[0029] 1) Add graphene oxide into the solvent, after ultrasonic dispersion, add stannate and stir evenly, then add surfactant until completely dissolved to obtain solution A; take selenium powder and add it to the reducing solvent, stir evenly to obtain solution B; then Add solution B dropwise to solution A to form mixed solution C, and stir evenly; wherein, the molar ratio of tin ions to selenium ions is 1: (1-4);
[0030] 2) Transfer the above mixed solution C to a hydrothermal kettle, then place the hydrothermal kettle in a hydrothermal reactor and react at 120-180°C for 12-24h. Repeated washing and centrifugation to obtain a black powder, drying the separated powder to obtain a SnSe / r-GO composite, the mass fraction of graphene oxide in the composite is 10%-30%.
[0031] Step 1) in, solvent is ethylene glycol or glycerin; Described stannate is K 2 Sn...
Embodiment 1
[0038] A preparation method of SnSe quantum dot / r-GO composite, comprising:
[0039] 1) Add 30mg graphene oxide to 30mL ethylene glycol, ultrasonically disperse for 60min and then add 0.2118gK 2 SnO 3 , 500r / min stirring 30min to K 2 SnO 3 Completely dissolve, then add 0.24g PVP to form a black uniform solution A; weigh 0.0725g Se powder, add it to 4ml ethylenediamine, stir at 500r / min for 30min until completely dissolved and record it as solution B; then add solution B dropwise to In solution A, place it on a magnetic stirrer and stir at a speed of 500r / min for 30min to obtain mixed solution C;
[0040] 2) Transfer the above mixed solution C to a 100mL polytetrafluoroethylene hydrothermal kettle, and then place the polytetrafluoroethylene hydrothermal kettle in a hydrothermal reactor at 140°C for 18 hours. After the reaction, cool to room temperature with the furnace, and then The black powder was obtained by repeated washing and centrifugation with absolute ethanol for 6...
Embodiment 2
[0045] A preparation method of SnSe quantum dot / r-GO composite, comprising:
[0046] 1) Add 25mg graphene oxide to 40mL glycerin, ultrasonically disperse for 70min and then add 0.03418gNa 2 SnO 3 , stirred at 500r / min for 40min to Na 2 SnO 3 Completely dissolve, then add 0.034g CTAB to form a black uniform solution A; weigh 0.01225g Se powder, add it to 3ml hydrazine hydrate, stir at 500r / min for 40min until completely dissolved and record it as solution B; then add solution B dropwise to the solution In A, place it on a magnetic stirrer and stir for 40 minutes at a speed of 500 r / min, and stir evenly to obtain a mixed solution C.
[0047] 2) Transfer the above mixed solution C to a 100mL polytetrafluoroethylene hydrothermal kettle, then place the polytetrafluoroethylene hydrothermal kettle in a hydrothermal reactor and react at 180°C for 14h. After the reaction, cool to room temperature with the furnace, and then The black powder was obtained by repeated washing and centr...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| size | aaaaa | aaaaa |
| quality score | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More