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He never expected that Qin Luo could successfully prepare graphene.

"Is it because of potassium permanganate?"

Li Min asked with a face full of horror.

"Well, the oxidation reaction of graphite is enhanced by potassium permanganate, so that the planar structure of carbon atoms in graphite gradually becomes a planar macromolecule with positive charges." Qin Luo said with a smile.

Hearing Qin Luo's words, Li Min suddenly realized that as an expert with a double degree in physics and chemistry, his accumulation of knowledge had already reached a terrifying level. He just didn't expect it before, but after Qin Luo's reminder, The whole preparation process became clear in an instant.

"So sulfate ions and sulfuric acid molecules gradually enter the graphite layer to form a sulfuric acid-graphite interlayer compound?" Li Min asked.

"Well, the low quality of graphene produced by redox reaction is largely due to the fact that sulfate ions float on the surface and do not enter the graphite layer. Potassium permanganate is used as a catalyst to produce planar macromolecules. This problem can be solved directly!" Qin Luo nodded and said.

At this moment, the audience was silent, and everyone including Li Min stared at Qin Luo dumbfounded.

They could hardly believe their ears.

If they hadn't seen it with their own eyes, they wouldn't believe anything they said.

There was no problem that the entire academic world could solve, so Qin Luo solved it with a little potassium permanganate.

After a while, Li Min was the first to come back to his senses. He glanced at Qin Luo, his eyes full of complexity.

It is the half-grown child in front of him who actually solved the problem that has plagued the physics world for many years.

Thinking of this, Li Min sighed deeply, bowed his hands to Qin Luo, and said with a smile: "Listening to what you say is better than studying for ten years, I am convinced."

"Uh...professor, don't say that, I'm just lucky." Qin Luo said shyly.

Being praised so much by a famous professor, Qin Luoshuai blushed slightly.

lucky?
Li Min shrugged his shoulders and smiled. During the physics experiment, the factor of good luck is not ruled out, but the premise of good luck is based on the corresponding strength.

If you don't have this strength, don't mention using potassium permanganate as a catalytic reaction, you don't even know how to prepare graphene.

"Luck is also a part of strength, and Qin has this strength." Li Min said with a smile.

Hearing Li Min's words, a bright smile appeared on Qin Luo's face.

"By the way, let's start testing the quality of graphene." Li Min said.

After this period of cooling, the graphene in the beaker has solidified, and now it's time to check the quality.

Qin Luo nodded, carefully took out the graphene in the beaker, and put it into the infrared spectrometer.

A few minutes later, an infrared spectrum picture appeared in front of everyone.

Absorption peak: a broad and strong absorption peak appears in the range of 3000~3700cm-1.

在1723、1382、1221、和1055cm-1出现吸收峰……并且出现伸缩振动峰-c=o。

In the deformation vibration peak of 1382 OH, the stretching peak becomes very weak. This result proves that graphene has been successfully prepared.

And the quality of the prepared graphene is quite high, even compared with the graphene prepared by mechanical exfoliation.

"Gulu~" Looking at the infrared spectrum data in front of him, Li Min swallowed cautiously.