Chapter 424

"Professor Qin, the materials you want." The assistant said with a smile

"thank you." Qin Luo nodded to thank him. He took a bottle of concentrated sulfuric acid from the cart and poured it into the beaker. Then he put it into the ice water bath and stirred it slowly. After a while, qinluo picked up the solid mixture of 100g graphite powder and 1g sodium nitrate and poured it slowly.

"Classmate Qin, do you put too much graphite powder?" Seeing Qin Luo's action, Li Min's forehead wrinkled slightly and his face was somewhat dignified.

As the director of the laboratory, he would not be a vase. Li Min himself is a double professor of physics and chemistry. He has prepared graphene by oxidation-reduction method more than once. He knows the whole preparation process clearly.

However, it is the first time for Qin Luo to pour down so much graphite powder at a time and add only a little sodium nitrate solid mixture.

Can the ratio of 100:1 cause chemical reaction?

"Not much, I even feel a little bit less." Qin Luo smiles and pours the remaining 100 grams of graphite powder into it, and then uses a magnetic rod to continuously stir the beaker.

“……” Looking at this fantastic way of operation, Li Min was completely speechless.

As expected, theory is theory and practice is practice. Even those who put forward the theory may not be able to succeed.

Thinking of this, Li Min waved to his assistant again: "go to the warehouse and seize some graphite powder."

"Yes." Assistant nodded and just wanted to turn around, but the next second, he was stunned in situ.

Qin Luo stirred the beaker and picked up potassium permanganate and poured it into the beaker!

At the moment, everyone, including Li Min, is wide eyed!

Without waiting for the crowd to come back to their senses, the beaker has begun to boil, and the bubbles keep coming out. At this moment, people's hearts are boiling.

They know that the most critical moment has come. If qinluo can keep the reaction temperature at 90-98 ° and keep it, then he can prepare graphene!

But how to keep the temperature, this has become the first problem to be solved.

"What would he do?" Li Min squints at Qin Luo, or his hands.

He would like to see what kind of material qinluo would add.

After about five minutes, Qin Luo, who had been waiting for a long time, finally moved. He took the H2O2 reducing oxidant from the shelf.

H2O2 reducing oxidant!

Li Min's eyes are scarlet and his whole body is shaking violently. Qin Luo's choice is beyond his expectation once again!

In the eyes of everyone's surprise, Qin Luo took the H2O2 reduction oxidant and poured it into the beaker.

The beaker boils again, and the thermometer on the side shows that the temperature of the reaction in the beaker is as high as 98 degrees!

This is the most important reaction temperature!

One minute, two minutes, ten minutes, half an hour!

As soon as the reaction temperature dropped, qinluo picked up the tweezers, clamped the beaker mouth, and washed it with dilute hydrochloric acid solution with a volume ratio of 1:10 and deionized water until no sulfuric acid was detected in the filtrate.

Now, at the bottom of the beaker, a layer of graphene looms.

He made it!

He successfully prepared graphene by redox reaction, and it seems that the quality is good!

Seeing this scene, Li Min couldn't restrain his astonishment,

in his heart