Anisotropic fluoride nanocrystals modulated by facet-specific passivation and their disordered surfaces

Rutile-type fluorides have been proven to be active components in the context of emerging antiferr-omagnetic devices. However, controlled synthesis of low-dimensional, in particular two-dimensional (2D), fluorides in a predictable and deterministic manner remains unrealized because of a lack of efficient anisotropic control, which impedes their further development in reduced dimensions. We report here that altered passivation of {110} growing facets can direct the synthesis of rutile-type fluoride nanocrystals into well-defined zero-dimensional (0D) particulates, one-dimensional (1D) rods and 2D sheets in a colloidal approach. The obtained nanocrystals show positive exchange bias and enhanced magnetic transition temperature from the coexistence of long-range antiferromagnetic order and disordered surface spins, making them strong alternatives for flexible magnetic devices and sensors.     

Encapsulating metal organic framework into hollow mesoporous carbon sphere as efficient oxygen bifunctional electrocatalyst

Applying metal organic frameworks (MOFs) in electrochemical systems is a currently emerging field owing to the rich metal nodes and highly specific surface area of MOFs. However, the problems for MOFs that need to be solved urgently are poor electrical conductivity and low ion transport. Here we present a facile in situ growth method for the rational synthesis of MOFs@hollow mesoporous carbon spheres (HMCS) yolk–shell-structured hybrid material for the first time. The size of the encapsulated Zeolitic Imidazolate Framework-67 (ZIF-67) is well controlled to 100 nm due to the spatial confinement effect of HMCS, and the electrical conductivity of ZIF-67 is also increased significantly. The ZIF@HMCS-25% hybrid material obtained exhibits a highly efficient oxygen reduction reaction activity with 0.823 V (vs. reversible hydrogen electrode) half-wave potential and an even higher kinetic current density (J_K = 13.8 mA cm⁻²) than commercial Pt/C. ZIF@HMCS-25% also displays excellent oxygen evolution reaction performance and the overpotential of ZIF@HMCS-25% at 10 mA cm⁻² is 407 mV. In addition, ZIF@HMCS-25% is further employed as an air electrode for a rechargeable Zn–air battery, exhibiting a high power density (120.2 mW cm⁻² at 171.4 mA cm⁻²) and long-term charge/discharge stability (80 h at 5 mA cm⁻²). This MOFs@HMCS yolk–shell design provides a versatile method for the application of MOFs as electrocatalysts directly.     

命运共同体的构建:中西方体育文化从区隔到融合

在国际化趋势的带动下,人类命运共同体的构建延伸渗透到了各个领域中。体育文化作为中西方存在明显差异的一个部分,如何在新的时代背景下打破原有区隔,树立新的定位和方向,并进一步实现融合是当前发展的关键。为此,文章采用文献资料法等,将围绕命运共同体的构建对中西方体育文化从区隔到融合展开探讨。     

培养理科学生创新能力的探索与实践

加强理科学生创新能力培养是当前理科教育改革的重要课题。本文以我院应用物理学、电子信息科学与技术两个理科专业学生为研究对象,以系统的思想、开放式教学理念为指导,从创新平台、创新环境、创新实践等方面进行改革与研究,探索出了一条适合理科学生创新能力培养的新模式。     

动物生理实验室建设及其在人才培养中的作用

高校实验室是培养学生创新能力和实践能力,实施素质教育的重要场所。本文在概述浙江大学动物生理学实验室硬件建设和相应的实验室运行体系构建的基础上,进一步探讨了实验室建设对人才培养的作用和体会。     

清代名人存世书目的收集整理及其意义

本文阐述了中国文化古籍因国家无文化遗产保护法规而大量流失海外,当代中国对文化遗产保护非常重视,制定了文物保护法,划定了历史遗迹保护范围.作者进一步阐述了收集整理清代名人存世书目工作的意义.参考文献5.     

"大学城"中心图书馆建设刍议

论述了建设大学城中心图书馆的意义,以及大学城中心图书馆所应承担的功能:文献资源整合功能、文献资源采编功能、综合素质教育及馆员培训中心.参考文献5.     

平稳接任有序运作——谈新任校长"三要三不要"

到一所学校走马上任的校长,要达到平稳接任,顺利地进入新的角色,有序开展工作的目的,必须有一定策略和讲究一定的方法、技巧。     

文学革命与“平民文学”的意义重构

五四新文化人对历史上的“平民文学”大加赞美,是为了彻底颠覆旧的文学传统,并为现代白话文的合法性寻求历史根据;而对当下的“平民文学”进行不遗余力的批判,又是为了对民众进行思想启蒙。在新文化人看来,这同样为建设新文学、新文化所必须。胡适等人不过是将历史上的平民文学、白话文学作为打倒贵族文学、文言文学的革命力量、革命工具来看待,一旦文言文的统治地位被颠覆,面对原生态的当下平民文学,新文化人实际上根本不可能全盘接受。对于平民文学,胡适等人最终采取了与传统文人类似的态度：在鼓吹、倡导它的同时,雅化的进程也开始了。由于力主以西方文学为老师,现代白话文经新文化人“雅化”后呈现出明显的“欧化”倾向。这种欧化的现代“白话文”具有强烈的先锋性、革命性与精英色彩,在精神气质上与“平民文学”拉开了距离。     

後現代主義藝術的没落——在金融海嘯中的思考

時代板蕩,風雲際會,文藝上即立時呈現蕙蘋雜處、良莠并生的狀態.明末清初有黄宗羲、王夫之、顧亭林等堅守大道之鴻儒,亦有恣肆無度之狂禪應運而生,南宋瀆萎,既有朱熹、陳亮諸大理學家風雲中立定精神,亦有鼓吹心性、招摇於市的輕薄兒跳騰雜沓於市,這就是歷史不斷重復的無情現實.