Chapter 425: Very High Quality

He never expected that Qin Luo would be able to successfully prepare graphene.

"Is it the 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 plane structure of carbon atoms in graphite gradually becomes a plane macromolecules with positive charges." Qin Luo said with a smile.

Hearing Qin Luo's words, Li Min suddenly realized that, as a double-degree expert in physics and chemistry, his accumulation of knowledge has already reached a terrifying level. The entire 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 prepared by redox reaction is largely due to the fact that sulfate ions float on the surface and do not enter the graphite layer, and 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 difficulty in the whole academic world that could be solved, so Qin Luo solved it with a small potassium permanganate.

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

It is this half-year-old child who has 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: "Listen to your words, it is better than ten years of study, I am convinced."

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

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

lucky?

Li Min shrugged his shoulders and smiled. During the physics experiment, he did not rule out the factor of luck, but the premise of good luck was based on the corresponding strength.

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

"Good luck is also a part of strength. 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 is 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 spectrogram appeared in front of everyone.

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

Absorption peaks appear at 1723, 1382, 1221, and 1055 cm-1...and stretching vibration peaks -c=o appear.

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

And the prepared graphene is of quite high quality, even better than the graphene prepared by mechanical exfoliation.

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