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Compared with single MOFs, MOFs@aerogels have ultra-high specific surface area, high porosity, good polymer compatibility and excellent structural pores, which can efficiently adsorb and remove pollutants in water. This paper introduced the structure and physicochemical properties of MOFs@aerogels, as well as the commonly used synthesis strategies of MOFs@aerogels. The advantages and disadvantages of the synthesis strategies and the challenges were analyzed. The adsorption conditions and adsorption properties of MOFs@aerogels for heavy metal ions and organic compounds in wastewater were described in detail, and the related adsorption mechanisms were systematically summarized and compared. The reusability of MOFs@aerogels in adsorption of pollutants was described. Finally, the optimization direction of the stability of MOFs in MOFs@aerogels, the matrix materials of aerogels, the application range and drying technology were proposed. It was proposed that improving the stability of MOFs@aerogels, exploring new matrix materials, expanding the application range of MOFs@aerogels, and exploring economical and green synthesis technologies would be the future research directions.

In order to avoid the severe climate changes caused by a large amount of greenhouse gas emissions from bringing destructive impact on global development, most countries are rapidly increasing the proportion of renewable resources in their energy production to accelerate the energy transition and realize the commitment of achieving carbon neutrality by the middle of this century. However, the legacy system did not consider the large-scale integration of renewable resources at the beginning of its formation. Therefore, it is often vulnerable to the intermittent, fluctuating and random characteristics of such resources. In this paper, based on the summing up and development of the smart grid and the sector coupling concept of energy utilization raised by Germany, and taking into account the widespread adoption of large-scale underground storage and AI-based (artificial intelligence) monitoring, analysis and forecasting, an integrated future framework named clean energy systems based on smart sector coupling (ENSYSCO) is proposed. Firstly, ENSYSCO closely couples the three sectors of energy's production, consumption and storage through applying the power-to-X-to-power techniques. The introduction of large-scale underground storage on one hand greatly improves the redundancy and flexibility of the system, on the other hand enables the regions to obtain a more abundant and stable energy reserve. Secondly, various functional complexes within the fixture energy system lead to more complex supply-demand relationships, and at the same time, there is an urgent request for proper transport grids. The lightweight AI method driven by the hybrid of physics and data not only endows the governance system powerful analysis, decision-making and feedback capabilities, but also makes the operation of the entire system more efficient, robust and energy-saving. Finally, most of the techniques in the ENSYSCO framework, e.g. the pumped-storage hydroelectricity in mines (PSHm), are mature enough and can be put into industrial applications immediately. Further research on the regenerative enhanced geothermal system (REGS) and the AI governance will help ENSYSCO to promote China's achievement of carbon neutrality more effective. [ABSTRACT FROM AUTHOR]

Biodegradable stents (BDSs) are the milestone in percutaneous coronary intervention(PCI). Biodegradable polymeric stents have received widespread attention due to their good biocompatibility, moderate degradation rate and degradation products without toxicity or side effects. However, due to the defects in mechanical properties of polymer materials, the clinical application of polymeric BDS has been affected. In this paper, the BDS geometric configuration design was analyzed to improve the radial strength, flexibility and reduce the shrinkage rate of biodegradable polymeric stents. And from the aspects of numerical simulation, in vitro experiment and animal experiment, the configuration design and mechanical properties of biodegradable polymeric stents were introduced in detail in order to provide further references for the development of biodegradable polymeric stents.

The effect of cultivation conditions on the optical purity of L(+)-lactic acid produced by Rhizopus oryzae HZS6 was investigated. The isomeric composition of lactic acid was influenced by the supplementation of L(+)-lactic acid to fermentation medium. L(+)-isomer increased with the dosage, no D(-)-lactic acid was observed when the concentration of supplemented L(+)-lactic acid in matrix was > or = 1.5 g/L. However, the L(+)-lactic acid yield, biomass and glucose conversion rate decreased with the dosage. With the same method, the supplementation of L(+)-lactic to substrate had no influence on isomeric composition of lactic acid by Lactobacillus and Escherichia coli.