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When hierarchical structure meets the solar cell

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Science Bulletin 2017年第4期62卷 234-235页

作者： Nailiang Yang Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore

Hierarchical structures with different length scales,which appear in many animals and plants,play important roles in their structural and functional integrity[1,2].These structures endow their host animals and plants with intriguing properties including super-hydrophobicity,reversible adhesion as well as mechanical or optical properties.Efforts also have been devoted to introducing bio-inspired hierarchical structures for solar cells to enhance

关键词：分层结构太阳能电池层次结构宿主动物超疏水性光学性质动植物附着力

Ultra-thin metal-organic framework nanoribbons

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National Science Review 2020年第1期7卷 46-52页

作者： Bingqing Wang Meiting Zhao Liuxiao Li Ying Huang Xiao Zhang Chong Guo Zhicheng Zhang Hongfei Cheng Wenxian Liu Jing Shang Jing Jin Xiaoming Sun Junfeng Liu Hua Zhang State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Department of Chemistry City University of Hong Kong

Structure engineering of metal-organic frameworks(MOFs) at the nanometer scale is attracting increasing interest due to their unique properties and new functions that normally cannot be achieved in bulk MOF crystals. Here, we report the preparation of ultra-thin MOF nanoribbons(NRBs) by using metal-hydroxide nanostructures as the precursors. Importantly, this general method can be used to synthesize various kinds of ultra-thin MOF NRBs, such as MBDC(M = Co, Ni; BDC = 1,4-benzenedicarboxylate), NiCoBDC,CoTCPP(TCPP = tetrakis(4-carboxyphenyl)porphyrin) and MIL-53(Al) NRBs. As a proof-of-concept application, the as-prepared ultra-thin Co BDC NRBs have been successfully used as a fluorescent sensing platform for DNA detection, which exhibited excellent sensitivity and selectivity. The present strategy might open an avenue to prepare MOF nanomaterials with new structures and unique properties for various promising applications.

关键词： metal-organic frameworks nanoribbons metal-hydroxide nanostructures structure engineering DNA detection

Phase Engineering of Novel Nanomaterials

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Phase Engineering of Novel Nanomaterials

硼掺杂石墨烯耦合双金属氧化物作为高效氧气析出电催化剂

中国化学会第十五届固态化学与无机合成学术会议

作者： Hua Zhang Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological University

＜正＞In this talk, I will summarize the recent research on the（crystal-）phase engineering of nanomaterials in my group. It includes the first-time synthesis of hexagonal-close packed（hcp） Au nanosheets（AuSSs） on graphene oxide, the first-time synthesis of 4 H hexagonal phase Au nanoribbons（NRBs）, the synthesis of crystal-phase heterostructured 4H/fcc Au nanorods,

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Science China materials 2020年第7期63卷 1247-1256页

作者：姜媛媛董凯逯一中刘佳玮陈博宋忠乾牛利 School of materials Science and Engineering University of JinanJinan 250022China Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore center for Advanced Analytical Science c/o School of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou 510006China

开发高效价廉的氧气析出反应电催化剂对于制备多种可再生能量转化和存储器件至关重要.本文中,我们设计合成了一系列硼掺杂石墨烯负载的钴镍双金属氧化物,并研究了其氧气析出电催化性能.研究结果表明适当温度下退火后的Co-Ni-Ox/BG(Co/N... 详细信息

开发高效价廉的氧气析出反应电催化剂对于制备多种可再生能量转化和存储器件至关重要.本文中,我们设计合成了一系列硼掺杂石墨烯负载的钴镍双金属氧化物,并研究了其氧气析出电催化性能.研究结果表明适当温度下退火后的Co-Ni-Ox/BG(Co/Ni比为1:1)在碱性条件下表现出非常高的氧气析出电催化性能.在电流密度为10 mA cm-2时,该电催化剂对氧气析出反应的过电位仅为310 mV,优于绝大多数已报道的基于单金属氧化物的催化剂,甚至可与商业RuO2电催化剂的性能相媲美.该双金属氧化物复合材料中,电荷分布的微调控及协同耦合效应都对该材料的电催化性能起到了促进作用.另外,本文还提出了几种可有效提高氧化物材料氧气析出电催化活性的方法.

关键词：氧化物材料电催化剂过电位双金属氧化物电催化性能存储器件电荷分布促进作用

Crystal phase control in two-dimensional materials

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Science China Chemistry 2018年第10期61卷 1227-1242页

作者： Jialiang Wang Yang Wei Hai Li Xiao Huang Hua Zhang Institute of Advanced materials(IAM) Nanjing Tech University (NanjingTech) Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University

It is the nature of crystals to exist in different polymorphs. The recent emergence of two-dimensional(2 D) materials has evoked the discovery of a number of new crystal phases that are different from their bulk structures at ambient conditions, and revealed novel structure-dependent properties, which deserve in-depth understanding and further exploration. In this contribution, we review the recent development of crystal phase control in 2 D materials, including group V and VI. transition metal dichalcogenides(TMDs), group IVA metal chalcogenides and noble metals. For each group of materials, we begin with introducing the various existing crystal phases and their structure-related properties, followed by a detailed discussion on factors that influence these crystal structures and thus the possible strategies for phase control. Finally, after summarizing the whole paper, we present the challenges and opportunities in this research direction.

关键词：水晶结构阶段控制材料二维结构相关贵金属性质

Phase Engineering of Novel Nanomaterials

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Phase Engineering of Novel Nanomaterials

NiS/Ni_(3)S_(2)@NiWO_(4)纳米阵列用于构造能量密度创新高的全固态混合超级电容器

中国化学会2019能源材料和缺陷化学研讨会

作者： Hua Zhang Department of Chemistry City University of Hong Kong Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological University

In this talk, I will summarize the recent research on the phase engineering of nanomaterials in my group. It includes the first-time synthesis of hexagonal-close packed(hcp) Au nanosheets(AuSSs) on graphene oxide, the first-time synthesis of 4 H hexagonal phase Au nanoribbons(NRBs), the synthesis of crystal-phase heterostructured 4H/fcc Au nanorods, the epitaxial growth of metals with novel phases on the aforementioned Au nanostructures, and the synthesis of amorphous/crystalline hetero-phase Pd nanosheets. In addition, the first-time synthesis of 1T’-MoS and 1T’-MoSe crystals have been achieved. Moreover, the phase transformation of transition metal dichalcogenide nanomaterials during our developed electrochemical Li-intercalation method will also be introduced. Interestingly, the lithiation-induced amorphization of PdPS is also achieved. Currently, my group focuses on the(crystal) phase-based properties and applications in catalysis, surface enhanced Raman scattering, waveguide, photothermal therapy, chemical and biosensing, clean energy etc., which we believe are quite unique and very important not only in fundamental studies, but also in practical applications. Importantly, the concepts of crystal-phase heterostructures and hetero-phase nanomaterials are proposed.

关键词： Crystal Phase Noble Metal Nanomaterials Hexagonal-Close Packed Face-centered Cubic Gold Ultrathin Nanosheets Transition Metal Dichalcogenides

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Science China materials 2021年第4期64卷 852-860页

作者：陈方帅崔晓亚刘畅崔柏桦窦树明许洁刘丝靓张鸿邓意达陈亚楠胡文彬 School of materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300072China Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China

混合型纳米电极材料的合理设计及合成对于其不同的应用具有重要意义,尤其是对于可用于下一代电动汽车和电子设备供电的高效纳米结构超级电容器(SCs)储能器件.本文报道了一种简便可控合成核-壳Ni_(3)S_(2)@NiWO_(4)纳米阵列的方法,并将... 详细信息

混合型纳米电极材料的合理设计及合成对于其不同的应用具有重要意义,尤其是对于可用于下一代电动汽车和电子设备供电的高效纳米结构超级电容器(SCs)储能器件.本文报道了一种简便可控合成核-壳Ni_(3)S_(2)@NiWO_(4)纳米阵列的方法,并将其用于混合超级电容器的独立电极.在5 mA cm^(-2)的条件下,所制备的Ni_(3)S_(2)@NiWO_(4)独立电极表现出高达2032μA h cm^(-2)的面积容量;即使电流密度增至50 mA cm^(-2),其容量保留率仍为63.6%.更重要的是,在功率密度为3.128 mW cm^(-2)时,该Ni_(3)S_(2)@NiWO_(4)纳米阵列混合超级电容器仍表现出1.283 mW h cm^(-2)的最大能量密度;而在能量密度为0.753 mW h cm^(-2)时,该超级电容器表现出的最大功率密度为41.105 mW cm^(-2).此外,该混合超级电容器在连续10,000次循环后仍能保持89.6%的原始容量,从而进一步证明其优异的稳定性.本研究为合理设计各种核壳金属纳米结构提供了便捷途径,有助于促进其在高性能储能器件领域的广泛应用.

关键词：混合超级电容器储能器件纳米电极材料能量密度纳米阵列设备供电金属纳米结构电动汽车

电化学方法把铂丝转化到碳布上形成铂二十面体和纳米立方体并用于电催化产氢（英文）

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Science China materials 2019年第1期62卷 115-121页

作者：罗志敏谭超良赖壮钗张晓陈君泽陈也陈博拱越张志成吴雪军李冰宗昀谷林张华 Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Institute of materials Research and Engineering A*STAR (Agency for Science Technology and Research)

湿化学法可控合成贵金属纳米结构通常需要金属盐或金属配合物作为前体,并利用表面活性剂和配体来调节和稳定纳米结构的形貌.本文通过一种简单的电化学方法(线性扫描伏安法),在三电极体系中直接把铂线转化到碳布表面形成铂二十面体和纳... 详细信息

湿化学法可控合成贵金属纳米结构通常需要金属盐或金属配合物作为前体,并利用表面活性剂和配体来调节和稳定纳米结构的形貌.本文通过一种简单的电化学方法(线性扫描伏安法),在三电极体系中直接把铂线转化到碳布表面形成铂二十面体和纳米立方体.在三电极体系中,铂线、碳布和Ag/AgCl(3 mol L^(-1)KCl)分别作为对电极、工作电极和参比电极.与商业Pt/C催化剂相比,制备的铂二十面体和纳米立方体展现出优越的电催化活性.该方法简单、有效,可拓展到其他贵金属纳米结构的合成和应用研究.如通过这种电化学方法直接将Au、Pd等块体材料转化成具有各种潜在应用的Au、Pd等纳米结构.

关键词：电化学方法纳米结构电催化活性二十面体立方体铂丝碳布转化

Ruthenium nanoclusters anchored on cobalt phosphide hollow microspheres by green phosphating process for full water splitting in acidic electrolyte

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Chinese Chemical Letters 2021年第1期32卷 511-515页

作者： Yunqie Deng Linjing Yang Yakun Wang Lili Zeng Jiayuan Yu Bo Chen Xiaoli Zhang Weijia Zhou Guangzhou Key Laboratory for Surface Chemistry of Energy materials New Energy Research InstituteSchool of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China Shandong Collaborative Innovation center of Technology and Equipements for Biological Diagnosis and Therapy Institute for Advanced Interdisciplinary Research(iAIR)University of JinanJi’nan 250022China Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore School of materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Transition metal phosphide(TMP) based electrocatalysts possessing special crystal and electronic structures attract broad attention in the field of electrocatalysis.Immense effort is made to optimize TMP catalysts aiming to satisfy the electrochemical catalysis performance.In this work,an environmentally friendly in situ green phosphating strategy and spatial limiting effect of the RuCo precursor is employed to fabricate the ruthenium nanoclusters anchored on cobalt phosphide hollow microspheres(Ru NCs/Co_(2)P HMs).The obtained Ru NCs/Co_(2)P HMs electrocatalysts exhibit high hydrogen evolution reaction(HER) activity at wide pH ranges,which require an overpotential of 77 mV to achieve the current density of 10 mA/cm^(2) in 0.5 mol/L H_(2)SO_(4) and 118 mV in 1.0 mol/L KOH.Besides,the multifunctional Ru NCs/Co_(2)P HMs exhibit good oxygen evolution reaction(OER) activity with an overpotential of 197 mV to reach the current density of 10 mA/cm^(2) in 0.5 mol/L H_(2)SO_(4),which is below that of the commercial RuO_(2) electrocatalyst(248 mV).A two-electrode electrolyzer is assembled as well,in acid electrolyte,it achieves a current density of 10 mA/cm^(2) at a voltage of 1.53 V,which is superior to that of the benchmark of precious metal-based electrolyzer(1.58 V).

关键词： Green phosphating Cobalt phosphide Ruthenium nanocluster Hydrogen evolution reaction Water splitting