Facile preparation of hydroxyl−functionalized mica nanosheets assisted by plasma treatment

The efficient exfoliation of mica, a naturally layered material, into two-dimensional (2D) nanosheets has received much attention due to its low price, good chemical stability, and better shielding function against UV light. However, fast and simple exfoliation of mica in a large-scale face a great challenge. In this work, we developed a simple and effective method for obtaining OH−functionalized mica nanosheets (MNs). The process involved calcination, plasma treatment, and ultrasonic exfoliation, resulting in a yield of 7.535%. Furthermore, the effects of sonication time, solvent type and particle sizes of mica were investigated. The conditions for the preparation of MNs were determined: mica calcination, plasma treatment, and sonication in ethanol for 5 h. XPS and FT−IR demonstrated that more hydroxyl groups were introduced to mica after the plasma treatment, which facilitated the exfoliation of mica

The Development History and Current Situation of General Practice Education in Guangdong Province in the Past 30 Years

With the strong support of national and local policies, the construction of general practice education system and personnel training have been developed in Guangdong Province for nearly 30 years. Since 1996, general practice education in Guangdong Province has gone through four stages, including exploration and start, vigorous growth, development and perfection, comprehensive development. Colleges and universities in Guangdong Province, represented by Guangzhou Medical University, have explored and established a multi-level, multi-path, multi-form and multi-objective general practice education system of treatment-prevention integration, with interconnected academy education, job-transfer training, standardized training, postgraduate education and continuing education, and a standardized training model of general practitioners based on "5+3" has been basically established. The pass rate of the provincial training certificate examination of general practice training students has reached more than 85%. In 2020, there were 4 general practitioners per 10 000 residents, meeting the national requirement of 3 general practitioners per 10 000 residents in 2020. With the purpose to analyze the current situation of the development of general practice education in Guangdong Province, this paper comprehensively summarized the experience and lessons of discipline construction and education training of general practice, broadened the paths and modes of the quality of general practice personnel training, put forward relevant suggestions, to provide policy ideas and reference basis for the rapid development of general practice education in Guangdong Province and even in China in the future