Method for preparing electron spin resonance standard substance by using hydrothermal method
An electron spin resonance and standard technology, applied in the direction of element selenium/tellurium, nanotechnology, etc., can solve the problems of high price, low output and high production cost, and achieve the effect of promoting development and simple process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0023] 1. Weigh 0.5g of Na with a purity of 99.99% 2 TeO 3 , 0.8g of Na with a purity of 99.9% 2 S 2 o 3 and 0.3g of polyvinylpyrrolidone with a purity of 99.9%, put into a polytetrafluoroethylene reactor with a capacity of 50ml;
[0024] 2. Add 40mL deionized water to the reaction kettle, stir magnetically for 30 minutes to mix until uniform, seal the PTFE lining, and put it in an automatic temperature-controlled oven. After 30 minutes, the oven temperature rises to 140°C and maintains this temperature React for 120 minutes;
[0025] 3. After the reaction was completed, it was lowered to room temperature, centrifuged to obtain a gray substance, washed with 99.9wt% ethanol, 99.5wt% acetone and deionized water in sequence, and then placed in a vacuum drying oven to dry, and finally the gray product was prepared. Electron spin resonance standard tellurium nanocrystals.
Embodiment 2
[0027] 1. Weigh 0.2g of H with a purity of 99.99% 2 TeO 3 , 0.5g Na with a purity of 99.9% 2 S 2 o 3 And 0.4g purity is the polyvinylpyrrolidone of 99.9%, puts into the polytetrafluoroethylene reactor that capacity is 50ml;
[0028] 2. Add 40mL deionized water to the reaction kettle, stir magnetically for 30 minutes until evenly mixed, seal the PTFE lining, put it into an automatic temperature control oven, after 30 minutes, the oven temperature rises to 120°C, and maintain this temperature React for 120 minutes;
[0029] 3. After the reaction was completed, it was lowered to room temperature, centrifuged to obtain a gray substance, washed with 99.9wt% ethanol, 99.5wt% acetone and deionized water in sequence, and then placed in a vacuum drying oven to dry, and finally the gray product was prepared. Electron spin resonance standard tellurium nanocrystals.
Embodiment 3
[0031] 1. Weigh 0.45g of K with a purity of 99.99% 2 TeO 3 , 0.75g purity is the hydrazine hydrate of 99.9% and 0.35g purity is the polyvinyl alcohol of 99.9%, puts into the polytetrafluoroethylene reactor that capacity is 50ml;
[0032] 2. Add 40mL deionized water to the reaction kettle, stir magnetically for 30 minutes until evenly mixed, seal the PTFE lining, and put it into an automatic temperature-controlled oven. After 30 minutes, the oven temperature rises to 180°C and maintains this temperature React for 120 minutes;
[0033] 3. After the reaction was completed, it was lowered to room temperature, centrifuged to obtain a gray substance, washed with 99.9wt% ethanol, 99.5wt% acetone and deionized water in sequence, and then placed in a vacuum drying oven to dry, and finally the gray product was prepared. Electron spin resonance standard tellurium nanocrystals.
[0034] Through the experimental comparison of Examples 1-3, on the one hand, no matter how the conditions c...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More