The post -level journal of undergraduate thesis after the 00s of the day, and the new method of developing and decomposing "permanent chemistry"

Undergraduate of Tianjin University Li Jianli: Due to love for scientific research /

On August 19, Li Yu Li, a 2018 undergraduate student of Tianjin University, was published online as a common first author, "Low -temperature mineralization of full fluoride carboxylic acid" on the top international academic journal "Science".

This article introduces a method that is more gentle and simpler and cheap than the current method of use. Stubborn, known as "permanent chemicals". From the second half of 2020, Li Yili has participated in the research of the topic. The computing work he did was a test of the assumptions of the results of the experimental team. At the same time, he also put forward new assumptions based on his own knowledge. This Guessing is ultimately proven to be right. Fluorinel and polylloxyl compounds (PFAS) are a chemical that is close to people's lives. For example, there are such substances in products such as fire foam, waterproof fabrics, and non -stick cookers. This kind of chemicals are extremely stable and can exist in the soil and water for a long time, and the normal environment cannot decompose it. Public reports show that once the chemicals enter the human body, they may also be associated with thyroid diseases, high cholesterol and cancer. For a long time, the methods of human treatment of this kind of chemicals have been severe and rude, such as high -temperature and high voltage incineration of high temperatures above 1,000 degrees Celsius, or degradation of electrical chemical method, but the requirements are harsh, highly cost -effective, and the processing process is easy to cause secondary times to cause secondary times. Pollution. This paper proposes a brand new method that can be mineralized (popular, that is, from organic matter to deposit inorganic, eliminate its pollution) under the mild conditions of 120 degrees Celsius, eliminate its pollution), and use it and use it. Reagents are common and cheap two -based baseylso (DMSO) solvents, water and sodium hydroxide. And the processed products include some inorganic fluoride ions and some organic small molecules, which are harmless. Li Yu Li said that although the current research team has only verified the decomposition of 10 PFAS, it is foreseeable that other PFAS may be transformed into the intermediate mentioned in the article and used the same method to use the same method. It is mineralized. The undergraduate published a top journal, and Li Yu Li said that he was lucky. In fact, this "lucky" is not easy. Since middle school, Li Jianli, who has a strong interest in chemistry, has joined the research team of Teacher Dang Yanfeng in the first year of studying in the Department of Chemistry, Tianjin University to do some basic scientific research. During the scientific research process, he also had a preliminary understanding of the work of some top scientists in the academic community. In the summer vacation of the sophomore, Li Bo, another senior in the undergraduate stage, introduced Li Bo, who was another senior in the party Yanfeng's research group, introduced Li Luo Los Angeles, the University of California. Research on the year. With the idea of ​​trying, Li Yu Li sent an email to Professor KFC Hawke, introducing his previous work and his work that he was interested in, and received a positive response from Professor KFC Hawke. At the beginning, Li Yuki did some basic work under the guidance of Professor KFC Hawke. Then he was co -guided by Professor KFC Hawke and Researcher Xue Xiaosong, a researcher at the Shanghai Academy of Sciences and William from Northwestern University. · Dicchill's research group cooperates to use calculation methods to conduct research on the reaction mechanism. The work starting from the second half of 2020 is "low -temperature mineralization of full fluoride carboxylic acid". When people usually assume that this type of PFAS can only decompose one carbon at a time, Li Yu Li has verified the error of this guess through calculation, and proposes its own new speculation: this kind of PFAS can decompose two or three at a time at a time at a time Carbon, and proposed that the whole fluorine is likely to be an important intermediate in the reaction, and was subsequently verified by the experimental group. At the same time, Li Yanli also speculated that ethanol should be in the final product through his own mechanism. Experiments have proved that Li's speculation was correct, and the experimental team eventually captured this product. Li Yu Li pointed out the direction for experiments through the calculation method. Li Yanli, who likes chemistry very much, enjoys the fun brought by chemistry. In addition, he has other chemical papers in the undergraduate stage to publish. After graduating from undergraduate, Li Yu Li also chose to continue his studies in the chemistry field.

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Source / Tianjin University News Network / Liu Xiaoyan Editor / Ma Xiaoya Cover Photography / Zhao Lotian Drawing Design / Yan Jingyi Liao Qianhui

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