杨肖研究室
Yang Group
研究 Research
化学元素是构成物质世界的基本单元，元素的利用决定了人类文明的存续和发展。我们关注化学元素的分离与回收，承继先人的智慧与品味，从无价中提取有价，探索从复杂中获得纯粹的最优方法，洞悉物质变换的内在规律。
Chemical elements shape everything of human civilization. We are devising novel processes to extract pure elements from complex systems, to gain insight into the nature of material transformation.
熔盐体系中含氧酸根离子的物理化学
Physical chemistry of oxyanions in molten salts
元素周期表的13族至16族多个元素都具有半导体特性，电负性介于常见的金属和非金属之间，易与氧结合形成含氧酸根离子，如硼酸根、硅酸根、磷酸根、硒酸根等。我们发现，这些含氧酸根离子在氯化钙熔盐中普遍具有较高的溶解度。我们的研究由此展开，试图系统揭示氯化钙熔盐体系中含氧酸根离子的形成、传质、结构以及电化学反应等基础物理化学特性，为元素提取或回收的新工艺开发奠定理论基础。
Multiple elements in the periodic table groups 13-16 possess semiconductor properties. They usually bind with O to form oxyanions, such as borate, silicate, phosphate and selenate. We found that all these oxyanions are soluble in molten CaCl2. Accordingly, the focus of our research is to clarify the physical chemistry of oxyanions in molten CaCl2, including formation mechanism, mass transfer, microstructure and electrochemical behavior, so as to lay the fundation to develop novel processes for elements extraction or recycling.
电化学提取单质磷元素 (P4)
Electrochemistry isolates elemental phosphorus
1669年德国炼金术士Brandt用碳热还原法从尿液蒸馏物中首次提取单质磷元素，为人类开启了一个现代化学的时代。
2019年我们发明了电化学提取磷元素的方法，正在努力使其变成一种可以实用的清洁生产技术，解决人类未来可能面临的磷资源短缺危机。
In 1669, a German alchemist named Brandt first discovered elemental phosphorus from urine distillate by carbothermic reduction.
In 2019, we devised a new method to isolate or recycle elemental phosphorus from phosphate-bearing solids by electrochemistry.
资料 Reference
* https://advanceseng.com/electrochemistry-enables-cleaner-production-white-phosphorus/
* X. YANG* and T. NOHIRA, “A New Concept for Producing White Phosphorus: Electrolysis of Dissolved Phosphate in Molten Chloride”, ACS Sustainable Chemistry & Engineering, 8 (2020), 13784-13792.
*. Y. ZHONG, X. YANG*, “Dissolution Behavior of Solid Ca3(PO4)2 in molten CaCl2”, Metallurgical and Materials Transactions B, 52 (2021), 3515-3523.
从下水道污泥灰中电化学提取单质磷元素的动画过程（点击播放）
A video showing the process of isolating P4 from sewage sludge ash by electrochemistry (click and play)