摘要：Poly(dibutyl itaconate-co-isoprene-co-methacrylic acid)(PDIM) elastomer was designed and synthesized by redox emulsion polymerization under mild conditions. PDIM has high molecular weight, relatively high yield, and low glass transition temperature(Tg). The structure of PDIM was determined by FTIR and NMR, and the carboxyl content was obtained by titration in a non-proton solvent. Tensile strength and elongation at break increased with increasing carboxyl content. In addition, the interaction between PDIM and silica was elucidated by rubber process analyzer(RPA) and TEM, and the results showed that the silica-PDIM interaction was strong, but the silica-silica interaction was weak.

摘要：Integrating two different catalytic active sites into one composite is a useful 2-in-1 strategy for designing high-efficient bifunctional catalysts,which can easily tailor the activity of each ***,we adopt the 2-in-1 strategy to design the metal oxyhydroxide supported on N-doped porous carbons(PA-CoFe@NPC)as the oxygen bifunctional catalyst,where NPC provides the activity for oxygen reduction reaction(ORR)while the metal oxyhydroxide is responsible for oxygen evolution reaction(OER).Results demonstrate that the PA-CoFe@NPC indeed exhibits both super ORR and OER ***,using bifunctional PA-CoFe@NPC as the oxygen electrode,the resulting Zn-air battery exhibits outstanding charge and discharge performance with the peak power density of 156.3 mW cm^(-2),and also exhibits a long-term cycle stability with continuous cyclic charge and discharge of 170 hours that is obviously better than the 20%Pt/C+IrO_(2)based *** 2-in-1 strategy in this work can be efficiently extended to design other bi-or multi-functional electrocatalysts.

摘要：Electrochemical synthesis of hydrogen peroxide(H2 O2)provides a clean and safe technology for large-scale H2 O2 *** core of this project is the development of highly active and highly selective *** studies demonstrate that carbonaceous materials are favorable catalysts because of their low-cost and tunable surface *** brief review first summarizes the strategies of carbonaceous material engineering for selective two-electron O2 reduction reaction and discusses potential *** addition,several device designs using carbonaceous materials as catalysts for H2 O2 production are ***,research directions are proposed for practical application and performance improvement.

摘要：Our recent theoretical studies have screened out CuCs-doped Ag-based promising catalysts for ethylene epoxidation[ACS Catal.11,3371(2021)].The theoretical results were based on surface modeling,while in the actual reaction process Ag catalysts are particle *** this work,we combine density functional theory(DFT),Wulff construction theory,and micro kinetic analysis to study the catalytic performance of Ag catalysts at the particle *** demonstrates that the CuCs-doped Ag catalysts are superior to pure Ag catalysts in terms of selectivity and activity,which is further proved by experimental *** characterization analysis finds that both Cu and Cs dopant promote particle growth as well as particle dispersion,resulting in a grain boundary-rich Ag ***,CuCs also facilitate electrophilic atomic oxygen formation on catalyst surface,which is benefitial for ethylene oxide formation and *** work provides a case study for catalyst design by combining theory and experiment.

摘要：微藻是一种体积微小的真核生物,可通过叶绿素a的光合作用将二氧化碳转化为多种生物活性物质。在过去的十年中,有关活体微藻和其他生物相容性成分组成的生物杂化材料在解决许多医学难题中显示出巨大的潜力,如肿瘤治疗、组织重建和药物输送。固定在常规生物材料中的微藻可以长时间维持其光合活性从而在局部提供氧气,同时也可作为调节细胞活性的生物相容性界面材料。微藻的运动性还激发了生物杂交机器人的发展,其中药物分子可通过非共价键吸附结合至微藻表面,并通过精确控制其运动轨迹将药物输送到目标区域。此外,微藻的自发荧光、趋光性和生物质生产可以整合到具有多种功能的新型生物杂化材料的设计中;通过基因工程改造的微藻可以赋予生物杂交材料新的特性,如特异性细胞靶向能力和从藻类细胞中局部释放重组蛋白——这些技术技术有望促进微藻基生物杂交材料(MBBM)在多个生物医学领域的临床应用。本文总结了MBBM的制造、生理学和运动能力;然后,回顾了MBBM近年来在生物医学领域的典型应用报告;最后,对MBBM的挑战和未来前景进行了讨论。

摘要：Currently adopted cross-linking methods in rubber industry are suffering from variable persistent issues, including the utilization of toxic curing packages, release of volatile organic compounds (VOCs) and difficulties in the recycling of end-of-life materials. It is of great importance to explore a green cross-linking strategy in the area. Herein, we report a new ‘‘green" strategy based on hydrolyzable ester cross-links for cross-linking diene-typed elastomers. As a proof of concept, a commercial carboxylated nitrile rubber (XNBR) is efficiently cross-linked by a bio-based agent, epoxidized soybean oil (ESO), without any toxic additives. ESO exhibits an excellent plasticization effect and excellent scorch safety for XNBR. The crosslinking density and mechanical properties of the ESO-cured XNBR can be manipulated in a wide range by changing simply varying the content of ESO. In addition, zinc oxide (Zn O) performs as a catalyst to accelerate the epoxide opening reaction and improve the cross-linking efficiency, serving as reinforcement points to enhance the overall mechanical properties of the ESO-cured XNBR. Furthermore, the end-oflife elastomer materials demonstrate a closed-loop recovery by selectively cleaving the ester bonds, resulting in very high recovery of the mechanical performance of the recycled composites. This strategy provides an unprecedented green avenue to cross-link diene elastomers and a cost-effective approach to further recycle the obtained cross-linked elastomers at high efficiency.

摘要：新冠病毒肺炎疫情期间,口罩成为不可或缺的防控利器和战略物资。如何科学、安全、有效地重复使用口罩,让每一只口罩发挥最大效能,数倍甚至十倍以上地提高防护口罩的有效使用时间,是疫情防控所急需解决的关键科技问题。我们提出了“口罩荷电再生重复使用”的技术方法,并开展了再生口罩性能评价。首先将使用后的口罩浸泡在56℃以上热水中30min进行消毒处理,随后采用普通家用电吹风机等对“失效”的口罩进行吹干荷电处理,使口罩可重新荷电而再生静电效应。对市售的三类典型口罩(一次性医用口罩、医用外科口罩、KN95级防护口罩)进行“热水泡灭毒+荷电再生”处理,实验证明其过滤层微观结构和口罩抗渗水性均无明显变化,再生口罩对非油性颗粒物的过滤效率满足相关口罩指标要求。相关研究结果为新冠病毒肺炎疫情期间的口罩荷电再生重复使用提供了参考。进一步研究了真人佩戴过程对不同初始性能的口罩的性能演变。浙江闰土股份有限公司在2月20日至3月30日期间应用“口罩荷电再生重复使用技术”,将原先每个员工每日发放一个一次性医用口罩,改为每个员工每三日发放一个一次性医用口罩,节约口罩12.25万只,降低了公司的口罩使用量,也确保了防疫工作的正常开展。本文基于真实佩戴口罩的研究,建立了基于荧光纳米颗粒渗透探伤的口罩检测新方法,为可重复使用口罩材料设计、结构优化和性能综合评价提供参考。

摘要：电催化二氧化碳还原反应(CO_(2)RR)被认为是一种潜在的碳循环技术,因为它可以利用CO_(2)作为资源在温和条件下生产高附加值燃料和化学品.因此,开发高效的二氧化碳还原反应催化剂极其重要.本文设计了一系列TM-N_(2)O_(2)C_(x)(TM=Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn)单原子催化剂,并利用密度函数理论研究了其对CO_(2)RR的催化活性.这些TM-N_(2)O_(2)C_(x)催化剂在相对较低的过电位下对三种不同的产物,包括CH_(4)、CO和HCOOH,表现出优异的CO_(2)RR产品选择性,其中ScN_(2)O_(2)C_(x)、Mn-N_(2)O_(2)C_(x)、Zn-N_(2)O_(2)C_(x)的CO_(2)RR产品是CO,V-N_(2)O_(2)C_(x)的产品是CH_(4),而其他六种催化剂会产生HCOOH.此外,该研究还揭示了CH_(4)形成的最佳途径,即*+CO_(2)→C*OOH→C*O+H_(2)O→C*HO→C*HOH→C*H+H_(2)0→C*H_(2)→C*H_(3)→*+CH_(4).总之,TMN_(2)O_(2)C_(x)催化剂对电催化CO_(2)RR表现出较高的催化活性,这为实验合成这些有前景的CO_(2)RR催化剂提供了有价值的信息.

摘要：Metal‐organic frameworks(MOFs)are a series of highly porous crystalline materials,which are built from inorganic metal nodes and organic linkers through coordination *** unique porous structural features(such as high porosity,high surface areas,and highly ordered nanoporous structures)and designable structures and compositions have facilitated their use in gas capture,separation,catalysis,and energy storage and ***,the design and synthesis of pure MOFs and their derivatives have opened new routes to develop highly efficient electrocatalysts toward oxygen reduction reactions(ORR)and oxygen evolution reactions(OER),which are the core electrode reactions in many energy storage and conversion techniques,such as metal‐air batteries and fuel *** review first discusses recent progress in the synthesis and the electrocatalytic applications of pure MOF‐based electrocatalysts toward ORR or OER,including pure MOFs,MOFs decorated with active species,and MOFs incorporated with conductive *** following section focuses on the advancements of the design and preparation of various MOF‐derived materials-such as inorganic nano‐(or micro‐)structures/porous carbon composites,pure porous carbons,pure inorganic nano‐(or micro‐)structured materials,and single‐atom electrocatalysts-and their applications in oxygen ***,we present a conclusion and an outlook for some general design strategies and future research directions of MOF‐based oxygen electrocatalysts.

摘要：Climate change caused by the increasing emission of CO_(2)to the atmosphere has become a global *** ameliorate this issue,converting CO_(2)into valuable chemicals is highly desirable,enabling a sustainable low-carbon *** this end,developing efficient catalytic systems for CO_(2)conversion has sparked intense interests from both academia and *** advantage of their highly porous structures and unique properties,metal−organic frameworks(MOFs)have shown great potential as heterogeneous catalysts for CO_(2)*** transformations involving CO_(2)have been accomplished over MOFs-based *** we provide a comprehensive and up-to-date review on recent advances of heterogeneous CO_(2)thermocatalysis using MOFs,highlighting relationships between structures and *** attention is given to the design strategies for improving the catalytic performance of *** available to enrich the catalytic active sites in MOF structures are stressed and their respective impacts on CO_(2)conversion efficiency are *** synergistic effects between each active site within the structure of MOFs and derivatives are *** the end,future perspectives and challenges in CO_(2)conversion by heterogeneous catalysis with MOFs are described.