Gengxu Han

Jilin University

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Zhen‐An Qiao

Jilin University

Yumeng Liu

Jilin University

Yuxiao Ding

Lanzhou Institute of Chemical Physics

Bingsen Zhang

Chinese Academy of Sciences

Liyun Zhang

Nankai University

Xiaoyan Sun

Qingdao Institute of Bioenergy and Bioprocess Technology

Saskia Heumann

Max Planck Institute for Chemical Energy Conversion

Zigeng Liu

Forschungszentrum Jülich

Alexander Klyushin

MAX IV Laboratory

Rüdiger‐A. Eichel

Forschungszentrum Jülich

Cooperative Institutions

Jilin University

Chinese Academy of Sciences

University of Chinese Academy of Sciences

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry

Nankai University

Max Planck Institute for Chemical Energy Conversion

Jilin Medical University

Hunan University

Ruhr West University of Applied Sciences

Soochow University

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Ultrathin Two‐dimensional Layered Composite Carbosilicates from in situ Unzipped Carbon Nanotubes and Exfoliated Bulk Silica

Angewandte Chemie International Edition (2023)

Yuxiao Ding Yumeng Liu Alexander Klyushin Liyun Zhang Gengxu Han

A key task in today's inorganic synthetic chemistry is to develop effective reactions, routes, and associated techniques aiming to create new functional materials with specifically desired multilevel structures and properties. Herein, we report an ultrathin two-dimensional layered composite of graphene ribbon and silicate via a simple and scalable one-pot reaction, which leads to the creation of a novel carbon-metal-silicate hybrid family: carbosilicate. The graphene ribbon is in situ formed by unzipping carbon nanotubes, while the ultrathin silicate is in situ obtained from bulk silica or commercial glass; transition metals (Fe or Ni) oxidized by water act as bridging agent, covalently bonding the two structures. The unprecedented structure combines the superior properties of the silicate and the nanocarbon, which triggers some specific novel properties. All processes during synthesis are complementary to each other. The associated synergistic chemistry could stimulate the discovery of a large class of more interesting, functionalized structures and materials.

Ribbon

Hybrid material

Carbon fibers

10.1002/anie.202318043

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Citations (3)

Ultrathin Two‐dimensional Layered Composite Carbosilicates from in situ Unzipped Carbon Nanotubes and Exfoliated Bulk Silica

Angewandte Chemie (2023)

Yuxiao Ding Yumeng Liu Alexander Klyushin Liyun Zhang Gengxu Han

Abstract A key task in today's inorganic synthetic chemistry is to develop effective reactions, routes, and associated techniques aiming to create new functional materials with specifically desired multilevel structures and properties. Herein, we report an ultrathin two‐dimensional layered composite of graphene ribbon and silicate via a simple and scalable one‐pot reaction, which leads to the creation of a novel carbon‐metal‐silicate hybrid family: carbosilicate. The graphene ribbon is in situ formed by unzipping carbon nanotubes, while the ultrathin silicate is in situ obtained from bulk silica or commercial glass; transition metals (Fe or Ni) oxidized by water act as bridging agent, covalently bonding the two structures. The unprecedented structure combines the superior properties of the silicate and the nanocarbon, which triggers some specific novel properties. All processes during synthesis are complementary to each other. The associated synergistic chemistry could stimulate the discovery of a large class of more interesting, functionalized structures and materials.

Carbon fibers

10.1002/ange.202318043

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Citations (1)

Interface and Charge Induced Molecular Self‐Assembly Strategy for the Synthesis of Reduced Graphene Oxide Coated with Mesoporous Platinum Sheets

Macromolecular Rapid Communications (2022)

Gengxu Han Yan Yang Danyang Feng Jingwei Liu Ling Zhang

Abstract The design of porous noble metal catalysts holds great promise in various electrocatalytic applications. However, it is still a challenge to improve the durability performance through constructing stable framework. Here, an interface and charge induced strategy is developed to synthesize large‐sized continuous reduced graphene oxide@mesoporous platinum (denoted as rGO@mPt) sheets under kinetic control by molecular self‐assembly design. Graphene oxide (GO) is a promising large‐sized growth interface for platinum. Cationic surfactant dioctadecyldimethylammonium chloride bridges the negatively charged GO and platinum precursors, while creating interconnected mesopores. The successful synthesis of rGO@mPt sheets relies on proper kinetic control, which is achieved by controlling pH, temperature, and the complexation of bromide ions. rGO@mPt sheets present strong crystallinity with a pure face‐centered cubic Pt phase. Worm‐like mesostructures with an average pore size of 2.2 nm exist throughout the sheets. rGO@mPt sheets possess both stable framework and abundant active sites, which markedly improve the durability on methanol oxidation reaction while maintaining relatively good catalytic activity. Long‐term stability test shows a slight loss of 1.2% activity after 250 cycles. Amperometric i – t curves reveal the mass current three times higher compared to commercial Pt/C at 3000 s.

Noble metal

10.1002/marc.202100923

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Citations (2)

Emulsion‐assisted interfacial polymerization strategy: Controllable architectural engineering of anisotropic and isotropic nanoparticles for high‐performance supercapacitors

Battery energy (2023)

Yumeng Liu Li Li Liangliang Zhang Gengxu Han Zhilin Liu

Abstract Anisotropic nanoparticles have attracted extensive attention due to their potential applications in material transport, energy storage, and biopharmaceutical. However, due to the inadequate understanding of microscopic particle formation, controllable asymmetric growth is still a great challenge. Herein, we report a facile emulsion‐assisted interfacial polymerization strategy for the synthesis of nitrogen‐doped porous carbon particles (NPCPs) with tunable anisotropic/isotropic architectures. During the synthesis process, we can form emulsion droplets with different nanostructures directionally through dual routes, thereby assisting and mediating the polymerization and growth process of the monomer to obtain poly‐diaminopyridine nanoparticles with various architectures. The corresponding NPCPs with tunable specific surface area (125–362 m 2 g −1 ), nitrogen content (10%–14%), and diverse morphologies can be acquired by calcination under N 2 atmosphere at 700 °C. The synergetic effect of abundant microporous structures and active nitrogen species content contributes to improve the physicochemical properties, while the unique anisotropic architecture increases the charge diffusion efficiency and enhances the high‐rate stability. Therefore, the resultant NPCPs electrode exhibits a specific capacitance up to 275 F g −1 at 0.2 A g −1 and surface‐area‐normalized capacitance of 83.0 μF cm −2 , indicating a promising material for high‐performance supercapacitors.

Interfacial polymerization

Emulsion polymerization

Specific surface area

10.1002/bte2.20220058

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Citations (10)

Ascorbic Acid‐derived New Polymer Spheres via Ternary Copolymerization for Highly Effective Activation of B Cells

Advanced Functional Materials (2024)

Gengxu Han Fangshen Li Bin Yu Yumeng Liu Jiaming Yang

Abstract Lymphocytes are crucial to defend against harmful pathogens and sustain adaptive immunity. Developing immunomodulating materials to activate lymphocytes is imperative to induce effective and enduring immune responses. Here, a new polymer serving as a highly efficient activator of B cells is reported and corresponding polymer spheres are synthesized through a droplet‐assisted ternary copolymerization process of ascorbic acid, ethylenediamine, and glyoxal. In‐depth studies are conducted on the polymerization mechanisms and polymer spheres ranging from 250 to 1200 nm with various surface functional groups are synthesized. These prepared polymer materials exhibit remarkable immunomodulatory functions correlated to the polymer spheres' size and surface functional groups, and effective activations on B cells are observed in vivo and in vitro. Through cell phagocytosis experiments and RNA sequencing analysis, it is proposed that the selective phagocytosis of B cells and the presence of CD21 on the B cell membrane contribute to the activation of B cells. This work has extended the realm of immunological research from a unique perspective of chemical synthesis, further substantiating the fundamental research and application potential of designing immunomodulating polymers.

10.1002/adfm.202405028

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