• 农民工代表:做新时代的奋斗者 2018-07-20
  • 杨晓渡构建系统完备、科学规范、运行高效的党和国家机构职能体系 2018-07-20
  • 【刚察天气】最新刚察今天天气,实时提供刚察气温、空气质量、24小时天气预报、生活指数查询 2018-07-20
  • 善行应该“落在脚下”(一线视角) 2018-07-20
  • 长安街西延将现“和力之门” 永定河特大桥钢塔首段完成吊装 2018-07-20
  • 吳嘉毓2015年綠地在長沙銷售目標58億 商辦項目超半數 2018-07-20
  • 北京便衣警察任大勇的日常 2018-07-19
  • 人民网评:从一颗拳头大小的心脏说起 2018-07-19
  • 人民日报域外听风:学会拿起“人文听诊器” 2018-07-19
  • 云南寻甸:筑就农村幸福路 2018-07-19
  • 第十七课 怎样理解强化不敢腐的震慑,扎牢不能腐的笼子,增强不想腐的自觉 2018-07-19
  • 要治本!中国向巴基斯坦动乱盛行地援助400万美元 2018-07-18
  • 贵州专利资助管理新规施行 2018-07-18
  • 智库观察:在雄安,这个资源很丰富 2018-07-18
  • “新媒体看津彩河北”活动在天津举办 2018-07-18
  • SEU Research Group Made Significant Progress in the Field of New Nano-interface Construction and Functionalization

    The publisher:吴婵Delivery time:2017-09-14Visit:113




    Recently, the research group leading by Prof. Liu Songqin and the research group leading by Prof. Zhang Yuanjian from Chemistry and Chemical Engineering Department of Southeast University and Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device made significant progress in the field of new nano-interface construction and functionalization respectively. The research results were published in international top journal “Journal of the American Chemical Society” (JACS).

    The low solubility of gases in aqueous solution is the major kinetic limitation of reactions that involve gases. To address this challenge, Prof. Liu Songqin’s group reports a nanochannel reactor with joint gas–solid–liquid interfaces and controlled wettability. As a proof of concept, a porous anodic alumina (PAA) nanochannel membrane with different wettability is used for glucose oxidase (GOx) immobilization, which contacts with glucose aqueous solution on one side, while the other side gets in touch with the gas phase directly. Interestingly, it is observed that the O2 could participate in the enzymatic reaction directly from gas phase through the proposed nanochannels, and a hydrophobic interface is more favorable for the enzymatic reaction due to the rearrangement of GOx structure as well as the high gas adhesion. As a result, the catalytic efficiency of GOx in the proposed interface is increased up to 80-fold compared with that of the free state in traditional aqueous air-saturated electrolyte. This triphase interface with controlled wettability can be generally applied to immobilize enzymes or catalysts with gas substrates for high efficiency. The research results were published in “Journal of the American Chemical Society”. The first author is doctoral candidate Mi Li, and the corresponding authors are Prof. Liu Songqin and Prof. Tian Ye from Institute of Chemistry of Chinese Academy of Science.

    Moreover, the research group leading by Prof. Zhang Yuanjian made important progress in 2Dcarbon nitride(CN) exfoliation and noncovalent interfacial functionalization.

    As an emerging nitrogen-rich 2D carbon material, graphitic carbon nitride (CN) has drawn much attention for applications ranging from photo-/electrocatalysts to biosensors. Interfacial modification of CN is fundamentally vital but is still in its infancy and remains challenging due to the low reactivity of CN. The research reports that, in conjunction with a π-π stacking interaction, bulk CN could be simultaneously exfoliated via facile mechanical grinding. The obtained CN nanosheets (m-CNNS) not only retained the pristine optoelectronic properties of bulk CN but also enriched a friendly interface for further coupling biomolecules with advanced properties, overcoming the deficiencies of CN in surface science. The m-CNNS were further covalently linked to a DNA probe, and the resultant electrochemiluminescent biosensor for the target DNA exhibited much enhanced sensitivity with respect to that obtained by direct physical absorption of the DNA probe on unmodified CNNS. This noncovalent exfoliation and interfacial modification should greatly expand the scope of potential applications of CN in areas such as biosensing and should also be applicable to other 2D materials in interface modulation. Besides, in another work of the research group, interfacial functionalized carbon nitride (CN) nanofibers were synthesized by hydrolyzing bulk CN in sodium hydroxide solution. The reversible assemble and disassemble behavior of the as-prepared CN nanofibers was investigated by using CO2 as a trigger to form a hydrogel network at first. Compared to the most widespread absorbent materials such as active carbon, graphene and previously reported supramolecular gel, the proposed CN hydrogel not only exhibited a competitive absorbing capacity (maximum absorbing capacity of methylene blue up to 402 mg/g) but also overcame the typical deficiencies such as poor selectivity and high energy-consuming regeneration. This work would provide a strategy to construct a 3D CN network and open an avenue for developing smart assembly for potential applications ranging from environment to selective extraction. The research results were published in Journal of the American Chemical Society and ACS Nano respectively. The first authors are doctoral candidate Ji Jingjing and Zhang Yuye. The corresponding author is Prof. Zhang Yuanjian.

    The above researches were supported by National Research Foundation, Young Overseas High-level Talents Introduction Plan of the Organization Department of the Central Committee of the CPC, and Science and Technology Department of Jiangsu Province, etc..

      


    返回原图
    /

     

    骨灰级时时彩经验 | pk10自动投注 | 同创时时彩 | 骨灰级时时彩经验 | pk10自动投注 | 同创时时彩 |