Vol 2 Chapter 425: Very high quality
He never expected that Qin Luo could successfully prepare graphene.
"Is it the cause of potassium permanganate?"
Li Min asked in astonishment.
"Well, the oxidation reaction of graphite is enhanced by potassium permanganate, so that the planar structure of carbon atoms in the graphite gradually becomes a planar macromolecule with a positive charge." 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. It was only unexpected before, but after Qin Luo’s hint, The whole preparation process became clear instantly.
"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 reason why the graphene produced by the redox reaction is of low quality is largely due to the fact that sulfate ions float on the surface and do not enter the graphite layer. Instead, 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 looked at Qin Luo dumbfounded.
They could hardly believe their ears.
If they hadn't seen it with their own eyes, they wouldn't believe it.
The entire academic circle had no difficulties that could be solved, so Qin Luo solved it with a little potassium permanganate.
After a long while, Li Min was the first to recover. He glanced at Qin Luo and his eyes were full of complexity.
It was the half-year-old child in front of him who had solved the problem that had plagued the physics world for many years.
Thinking of this, Li Min sighed deeply, arched his hand to Qin Luo, and said with a smile: "Listening to the Lord's words is better than reading for ten years, and I am convinced."
"Uh...Professor, don't say that, I'm just lucky." Qin Luo said shyly.
Qin Luoshuai blushed slightly when he was praised so much by a famous professor.
lucky?
Li Min shrugged his shoulders and smiled. During the physics experiment, the factor of good luck was not ruled out, but the premise of good luck was based on corresponding strength.
If you don't have this capability, don't mention using potassium permanganate as a catalytic reaction. You don't even know how to prepare graphene.
"Good luck is also part of strength. Qin has this strength." Li Min said with a smile.
A bright smile appeared on Qin Luo's face when he heard Li Min's words.
"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.
After a few minutes, an infrared spectrum appeared in front of everyone.
Absorption peak: A wide 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 O-H deformation vibration peak of 1382, the stretching peak becomes very weak. This result proves that the graphene has been successfully prepared.
In addition, the prepared graphene is of quite high quality, even better than the graphene prepared by the mechanical exfoliation method.
"Guru~" Looking at the infrared spectrum data in front of him, Li Min swallowed carefully.
