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The research team of Liu Mingxian, the School of Chemistry Science and Engineering, proposed that defective engineering regulation and control strategies realize smart ion transmission / penetration e

As the industrialization process accelerates, energy consumption and greenhouse gas emissions have increased, prompting researchers to find renewable energy as an alternative.As a “blue energy source”, the use of ion concentration between freshwater and saline -containing water to obtain energy is considered to be a potential plan to solve the global energy crisis and environmental problems.Reverse electromodonatting (Red), as one of the methods of infiltration energy into electrical energy, requires high -performance ion selective membranes to achieve high -efficiency ion transmission.However, the existing surface charge density adjustment method has problems such as lack of ion selectivity, limited power density, and poor membrane durability in the Red application. Therefore, new strategies need to solve these problems.The development of new ion selective membranes to further enhance ion transmission performance is one of the important strategies.Professor Liu Mingxian of the School of Chemistry Science and Engineering of Tongji University, Researcher Kong Biao, Fudan University, and Researcher Xie Lei, Xi’an Jiaotong University conducted cooperation around the problem of the problem, and proposed a strategy based on the defective engineering regulatory surface charge strategy.Ion transmission realizes penetration and power generation.Recently, the relevant research results are “Interfacial Super-Assembly of Vacance Engineered Ultrathin-NANOSHEETS TOWARD NANORT ION TRANSPORT and SALINITY POWER CONVERSION” Published on the topic in the international topic journal “Angeewandte Chemie International Edition”.

The research team puts the interface overcoming the interface of the Nicoldh (Voldh) and the cellulose nano-fiber-wrapped carbon nano-cubes, and prepare the Voldh/CNF-CNT composite ion channel film to achieve the effectiveness of the surface charge density of the surface charge density.Regulate.This membrane has a rich Octobic -level cationic selective ionic channel with a free spacing of the layer of about 3.62 å. It has a dimensional ion selective performance, which improves the hydrophilicity and surface charge density of the film.Implement excellent charge selectivity.

XRD and synchronous radiation Giwaxs and other representations confirmed that the preparation of the preparation of the preparation of the Elastic ion channel, the inter -layer free spacing is about 3.62 å.Through defective engineering and interface overcoming, the hydrophilicity of the composite membrane in the water is significantly improved, which is conducive to the transmission of ions in the ion channel.

Rich surface negative charges are conducive to the selectivity of cations and effectively improve the diffusion and migration rate of ions in the composite membrane channel, thereby improving the transmission characteristics of the composite membrane cross -membrane ion.

Researchers have further assembled Voldh/CNF-CNT composite membrane as nano-flow system to study its ion transmission characteristics and penetration energy power generation performance.The composite membrane has excellent ion choice, pH and temperature -sensitive ion transmission behavior. Under the conditions of simulation river water and seawater, high -power density (5.35W/m2) For long -term durability, power density is increased by nearly 400%compared to unprocessed NICOLDH membranes.

The DFT theory calculation shows that defect engineering processing can regulate the electronic structure of LDH, thereby regulating its surface charge, and further affecting its ion transmission and adsorption characteristics in the channel.It is overcomes with the CNF-CNT interface that can achieve unique-level ion channels and increasing surface charges in the channel. This not only provides a wealth of ion transmission paths, but also maximizes the restricted geometric internal ions-walls-wallsThe interface interaction gives high selective ion transmission characteristics.

Professor Liu Mingxian of Tongji University, Researcher Kong Biao of Fudan University, and Researcher Xie Lei of Xi’an Jiaotong University as the author of the paper, and Abdul Black Wood Avati, a doctoral student of the School of Chemistry and Engineering of Tongji University as the first author of the thesis.The research was funded by the National Natural Science Foundation of China and the Shanghai Science and Technology Commission.

Thesis link: https://onlinelibrary.wiley.com/doi/10.1002/anie.202407491

Another news,Professor Liu Mingxian recently joined with Shanghai Electric Power University, Professor Min Yulin and Dr. Xu Tingting, and Academician Guo Zaiping, Adelaide University, Australia.DEPOSITION for Long-Term Lithium Metal Batteries “was published in the world’s top international journal” AngeWandte Chemie International Edition “, and Tongji University School of Chemistry and Engineering Zhang Da was the first author of the paper.

Thesis link: https://onlineelibrary.wiley.com/doi/10.1002/anie.202315122


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