Hybrid materials are attracting intensive attention for their applications in electronics, photoelectronics, LEDs, field-effect transistors, etc. Engineering new hybrid materials and further exploiting their new funct...Hybrid materials are attracting intensive attention for their applications in electronics, photoelectronics, LEDs, field-effect transistors, etc. Engineering new hybrid materials and further exploiting their new functions will be significant for future science and technique development. In this work, alternatively stacked self-assembled CoAl LDH/MoS2 nanohybrid has been successfully synthesized by an exfoliation-flocculation method from positively charged CoAl LDH nanosheets（CoAl-NS） with negatively charged MoS2 nanosheets（MoS2-NS）. The CoAl LDH/MoS2 hybrid material exhibits an enhanced catalytic performance for oxygen evolution reaction（OER） compared with original constituents of CoAl LDH nanosheets and MoS2 nanosheets. The enhanced OER catalytic performance of CoAl LDH/MoS2 is demonstrated to be due to the improved electron transfer, more exposed catalytic active sites, and accelerated oxygen evolution reaction kinetics.展开更多
Constructing nanohybrids with a synergistic effect using multi-components and specific micro/nanostructures can significantly enhance their electrocatalytic activity.In this work,we fabricated an In_(2)O_(3)■NC@GO na...Constructing nanohybrids with a synergistic effect using multi-components and specific micro/nanostructures can significantly enhance their electrocatalytic activity.In this work,we fabricated an In_(2)O_(3)■NC@GO nanohybrid,in which In_(2)O_(3)nanoparticles(NPs)were encapsulated by an N-doped carbon(NC)shell and supported on graphene.The multi-components in In_(2)O_(3)■NC@GO synergistically optimize the structural and electronic properties of the material.The particle size and dispersion of In_(2)O_(3)NPs were optimized owing to the separation effect of the amorphous NC shell and graphene support.This separation effect exposes more number of active sites for the electrochemical reaction.Abundant oxygen vacancies exist in In_(2)O_(3),leading to a stronger ability for the adsorption and activation of CO.The NC shell inhibits the direct contact between the electrolyte and In_(2)O_(3),which significantly suppresses competitive Hevolution.The charge transfer during the electrocatalysis process is also effectively enhanced due to the carbon components.The synergistic effect of multi-components in the In_(2)O_(3)■NC@GO sample results in a significantly improved COreduction reaction performance with a high HCOOFaradic efficiency(FE)of 91.2%and a current density of 40.38 m A cmat–0.8 V obtained using a flow cell.The present work demonstrates that rationally designing nanohybrids with multifunctional components is an effective strategy for optimizing the structural and electrocatalytic properties of materials for energy conversion.展开更多
Dihydronicotinamide adenine dinucleotide(NADH)is an important enzyme in all living cells,which is found to be abnormally expressed in cancer cells.Since it is redox-active,an electrochemical detection method would be ...Dihydronicotinamide adenine dinucleotide(NADH)is an important enzyme in all living cells,which is found to be abnormally expressed in cancer cells.Since it is redox-active,an electrochemical detection method would be suitable for monitoring its concentration in biological fluids.Here we present a strategy for specific determination of NADH in real human serum by using RhIr@MoS2 nanohybrids based microsensor.To implement the protocol,RhIr nanocrysrals are in-situ grown onto MoS2 interlayers forming a nanohybrid structure(RhIr@MoS2).After being locally deposited on an electrochemical microsensor,it could be used for the analysis of NADH.The developed RhIr@MoS2 nanohybrids based microsensor possesses the ability for analyzing NADH at the applied potential of 0.07 V(much lower than most reported values).The detection limit is evaluated as low as 1 nmol/L even in bovine serum albumin(BSA)media.In addition,the sampling analysis of human serum from cancer patients and health controls shows that the microsensor displays good diagnostic sensitivity and specificity,illustrating that this developed detection technique is a relatively accurate method for measuring NADH in biological fluids.The proposed electrochemical microsensor assay also owns the benefits of convenience,disposable and easy processing,which make it a great possibility for future point-of-care cancer diagnosis.展开更多
The development of strain sensors with both superior sensitivity(gauge factor(GF)>100)and broad strain-sensing range(>50%strain)is still a grand challenge.Materials,which demonstrate significant structural defor...The development of strain sensors with both superior sensitivity(gauge factor(GF)>100)and broad strain-sensing range(>50%strain)is still a grand challenge.Materials,which demonstrate significant structural deformation under microscale motion,are required to offer high sensitivity.Structural connection of materials upon large-scale motion is demanded to widen strainsensing range.However,it is hard to achieve both features simultaneously.Herein,we design a crepe roll structure-inspired textile yarn-based strain sensor with one-dimensional(1D)-two-dimensional(2D)nanohybrid strain-sensing sheath,which possesses superior stretchability.This ultrastretchable strain sensor exhibits a wide and stable strain-sensing range from microscale to large-scale(0.01%–125%),and superior sensitivity(GF of 139.6 and 198.8 at 0.01%and 125%,respectively)simultaneously.The strain sensor is structurally constructed by a superelastic 1D-structured core elastomer polyurethane yarn(PUY),a novel high conductive crepe roll-structured(CRS)1D-2D nanohybrid multilayer sheath which assembled by 1D nanomaterials silver nanowires(AgNWs)working as bridges to connect adjacent layers and 2D nanomaterials graphene nanoplates(GNPs)offering brittle lamellar structure,and a thin polydopamine(PDA)wrapping layer providing protection in exterior environment.During the stretching/deformation process,microcracks originate and propagate in the GNPs lamellar structure enable resistance to change significantly,while AgNWs bridge adjacent GNPs to accommodate applied stress partially and boost strain.The 1D crepe roll structure-inspired strain sensor demonstrates multifunctionality in multiscale deformative motion detection,such as respiratory motions of Sprague–Dawleyw rat,flexible digital display,and proprioception of multi-joint finger bending and antagonistic flexion/extension motions of its flexible continuum body.展开更多
Due to its fascinating and tunable optoelectronic properties,semiconductor nanomaterials are the best choices for multidisciplinary applications.Particularly,the use of semiconductor photocatalysts is one of the promi...Due to its fascinating and tunable optoelectronic properties,semiconductor nanomaterials are the best choices for multidisciplinary applications.Particularly,the use of semiconductor photocatalysts is one of the promising ways to harness solar energy for useful applications in the field of energy and environment.In recent years,metal oxide-based tailored semiconductor photocatalysts have extensively been used for photocatalytic conversion of carbon dioxide(CO_(2))into fuels and other useful products utilizing solar energy.This is very significant not only from renewable energy consumption but also from reducing global warming point of view.Such current research activities are promising for a better future of society.The present mini-review is focused on recent developments(2–3 years)in metal oxide semiconductor hybrid photocatalysts-based photo-electrochemical conversion of CO_(2)into fuels and other useful products.First,general mechanism of photo-electrochemical conversion of CO_(2)into fuels or other useful products has been discussed.Then,various metal oxide-based emerging hybrid photocatalysts including tailoring of their morphological,compositional,and optoelectronic properties have been discussed with emphasis on their role in enhancing photoelectrochemical efficienty.Afterwards,mechanism of their photo-electrochemical reactions and applications in CO_(2)conversion into fuels/other useful products have been discussed.Finally,challenges and future prospects have been discussed followed by a summary.展开更多
Sodium-tellurium(Na-Te)battery,thanks to high theoretical capacity and abundant sodium source,has been envisaged as one promising battery technology,its practical application yet faces daunting challenges regarding ho...Sodium-tellurium(Na-Te)battery,thanks to high theoretical capacity and abundant sodium source,has been envisaged as one promising battery technology,its practical application yet faces daunting challenges regarding how to mitigate the critical issues of uncontrollable dendrites growth at Na anode and polytellurides shuttling effect at Te cathode.We here report an elaborative design for fabrication of microsphere skeleton nanohybrids with three-dimensional(3D)hierarchical porous carbon loading CeO_(2)quantum dots(CeO_(2)-QDs/HPC),which feature highly favorable properties of sodiophilic and catalysis for hosting sodium and tellurium,respectively.The systematic investigations coupling with first-principle calculations demonstrate the CeO_(2)-QDs/HPC not only offers favorable structure and abundant electrocatalytic sites for facilitating interconversion between Te and NaxTe as a cathode host,but also can function as dendrite inhibitor anode host for reversible sodium electro-plating/deposition.Such Na-Te battery exhibits admiring electrochemical performance with an impressive specific capacity of 392 mAh g1,a long cycling stability over 1000 cycles,as well as remarkably high energy density of 192 Wh kg1 based on the total mass of anode and cathode.Such proof-of-concept bifunctional host design for active electrode materials can render a new insight and direction to the development of high-performance Na-Te batteries.展开更多
嵌入型过渡金属氧化物因具有安全的工作电压、高比容量和快速的嵌锂能力而受到广泛关注.但低本征电导率特性严重影响其作为锂电负极材料的寿命和性能.本文通过简便易行、可规模化放大的二氧化碳热处理方法构筑了具有新型嵌覆型碳结构的N...嵌入型过渡金属氧化物因具有安全的工作电压、高比容量和快速的嵌锂能力而受到广泛关注.但低本征电导率特性严重影响其作为锂电负极材料的寿命和性能.本文通过简便易行、可规模化放大的二氧化碳热处理方法构筑了具有新型嵌覆型碳结构的Nb_(2)O_(5)/C纳米杂化材料.在控制碳含量的前提下,实现了颗粒聚集体内部表面可控碳包覆.以嵌覆型碳结构的Nb_(2)O_(5)/C纳米杂化材料为负极组装的锂离子电池在40 mA g(-1)电流密度下容量可达387 mA hg(-1),而在200 mA g(-1)电流密度下循环500次后,容量保持率在92%以上.采用电化学滴定、差分电化学质谱(DEMS)等方法对嵌覆型五氧化二铌/碳纳米杂化材料脱嵌锂动力学过程以及产气行为进行了研究.本文提出的嵌覆型碳结构有望为高性能嵌入型过渡金属氧化物的结构设计提供参考.展开更多
Inorganic/organic nanohybrids composed of arrayed TiO_2 nanotubes（Ti NTs）/porphyrin nanoparticles（NPs） have been fabricated via a wet chemical approach. The inorganic component, particularly the arrayed one-dimens...Inorganic/organic nanohybrids composed of arrayed TiO_2 nanotubes（Ti NTs）/porphyrin nanoparticles（NPs） have been fabricated via a wet chemical approach. The inorganic component, particularly the arrayed one-dimensional（1D） nanostructures, provides high charge-carrier mobility and rapid charge transport. The organic component exhibits extensive visible light absorption and good solution processability. Additionally, the geometric restraint by supramolecular assembly renders an improved photostability. A combination of these two components could thus allow for an efficient solar energy conversion. In this work, a colloid of porphyrin NPs prepared by a solvent exchange method is coated on anodic Ti NTs by means of a dip-coating treatment to form inorganic/organic hybrids. The hybrids exhibit an improvement on solar absorption and a significant enhancement on photocurrent generation at a small bias compared with individual component. Herein, the inorganic/organic nanohybrids are proved to be excellent photoanodes highly responsive to visible light and thus pave a way to discover new inorganic/organic assemblies for high-performance optoelectronic applications, as well as for device integration.展开更多
基金financially supported by NNSFC(No.21025104,21271171,and 91022018)
文摘Hybrid materials are attracting intensive attention for their applications in electronics, photoelectronics, LEDs, field-effect transistors, etc. Engineering new hybrid materials and further exploiting their new functions will be significant for future science and technique development. In this work, alternatively stacked self-assembled CoAl LDH/MoS2 nanohybrid has been successfully synthesized by an exfoliation-flocculation method from positively charged CoAl LDH nanosheets（CoAl-NS） with negatively charged MoS2 nanosheets（MoS2-NS）. The CoAl LDH/MoS2 hybrid material exhibits an enhanced catalytic performance for oxygen evolution reaction（OER） compared with original constituents of CoAl LDH nanosheets and MoS2 nanosheets. The enhanced OER catalytic performance of CoAl LDH/MoS2 is demonstrated to be due to the improved electron transfer, more exposed catalytic active sites, and accelerated oxygen evolution reaction kinetics.
基金the National Natural Science Foundation of China(Nos.52001227,51972224)。
文摘Constructing nanohybrids with a synergistic effect using multi-components and specific micro/nanostructures can significantly enhance their electrocatalytic activity.In this work,we fabricated an In_(2)O_(3)■NC@GO nanohybrid,in which In_(2)O_(3)nanoparticles(NPs)were encapsulated by an N-doped carbon(NC)shell and supported on graphene.The multi-components in In_(2)O_(3)■NC@GO synergistically optimize the structural and electronic properties of the material.The particle size and dispersion of In_(2)O_(3)NPs were optimized owing to the separation effect of the amorphous NC shell and graphene support.This separation effect exposes more number of active sites for the electrochemical reaction.Abundant oxygen vacancies exist in In_(2)O_(3),leading to a stronger ability for the adsorption and activation of CO.The NC shell inhibits the direct contact between the electrolyte and In_(2)O_(3),which significantly suppresses competitive Hevolution.The charge transfer during the electrocatalysis process is also effectively enhanced due to the carbon components.The synergistic effect of multi-components in the In_(2)O_(3)■NC@GO sample results in a significantly improved COreduction reaction performance with a high HCOOFaradic efficiency(FE)of 91.2%and a current density of 40.38 m A cmat–0.8 V obtained using a flow cell.The present work demonstrates that rationally designing nanohybrids with multifunctional components is an effective strategy for optimizing the structural and electrocatalytic properties of materials for energy conversion.
基金supported by National Key R&D Program of China(No.2016YFA0200800)Shanghai Science and Technology Innovation Action Plan(No.19520744200)+1 种基金Natural Science Foundation of Shanghai(Nos.17ZR1410000,18ZR1415400)the financial support of State Key Laboratory of Transducer Technology of China(No.SKT1806)。
文摘Dihydronicotinamide adenine dinucleotide(NADH)is an important enzyme in all living cells,which is found to be abnormally expressed in cancer cells.Since it is redox-active,an electrochemical detection method would be suitable for monitoring its concentration in biological fluids.Here we present a strategy for specific determination of NADH in real human serum by using RhIr@MoS2 nanohybrids based microsensor.To implement the protocol,RhIr nanocrysrals are in-situ grown onto MoS2 interlayers forming a nanohybrid structure(RhIr@MoS2).After being locally deposited on an electrochemical microsensor,it could be used for the analysis of NADH.The developed RhIr@MoS2 nanohybrids based microsensor possesses the ability for analyzing NADH at the applied potential of 0.07 V(much lower than most reported values).The detection limit is evaluated as low as 1 nmol/L even in bovine serum albumin(BSA)media.In addition,the sampling analysis of human serum from cancer patients and health controls shows that the microsensor displays good diagnostic sensitivity and specificity,illustrating that this developed detection technique is a relatively accurate method for measuring NADH in biological fluids.The proposed electrochemical microsensor assay also owns the benefits of convenience,disposable and easy processing,which make it a great possibility for future point-of-care cancer diagnosis.
基金the TBRS grant from the Research Grant Council of the Hong Kong Special Administrative Region Government(T42-717/20-R)the City University research grant(CityU11206818).
文摘The development of strain sensors with both superior sensitivity(gauge factor(GF)>100)and broad strain-sensing range(>50%strain)is still a grand challenge.Materials,which demonstrate significant structural deformation under microscale motion,are required to offer high sensitivity.Structural connection of materials upon large-scale motion is demanded to widen strainsensing range.However,it is hard to achieve both features simultaneously.Herein,we design a crepe roll structure-inspired textile yarn-based strain sensor with one-dimensional(1D)-two-dimensional(2D)nanohybrid strain-sensing sheath,which possesses superior stretchability.This ultrastretchable strain sensor exhibits a wide and stable strain-sensing range from microscale to large-scale(0.01%–125%),and superior sensitivity(GF of 139.6 and 198.8 at 0.01%and 125%,respectively)simultaneously.The strain sensor is structurally constructed by a superelastic 1D-structured core elastomer polyurethane yarn(PUY),a novel high conductive crepe roll-structured(CRS)1D-2D nanohybrid multilayer sheath which assembled by 1D nanomaterials silver nanowires(AgNWs)working as bridges to connect adjacent layers and 2D nanomaterials graphene nanoplates(GNPs)offering brittle lamellar structure,and a thin polydopamine(PDA)wrapping layer providing protection in exterior environment.During the stretching/deformation process,microcracks originate and propagate in the GNPs lamellar structure enable resistance to change significantly,while AgNWs bridge adjacent GNPs to accommodate applied stress partially and boost strain.The 1D crepe roll structure-inspired strain sensor demonstrates multifunctionality in multiscale deformative motion detection,such as respiratory motions of Sprague–Dawleyw rat,flexible digital display,and proprioception of multi-joint finger bending and antagonistic flexion/extension motions of its flexible continuum body.
基金supported financially by Department of Science and Techanology,India,Institut National de la Recherche Scientifique(INRS),andÉcole de Technologie Supérieure(ÉTS),the Marcelle-Gauvreau Engineering Research Chair program。
文摘Due to its fascinating and tunable optoelectronic properties,semiconductor nanomaterials are the best choices for multidisciplinary applications.Particularly,the use of semiconductor photocatalysts is one of the promising ways to harness solar energy for useful applications in the field of energy and environment.In recent years,metal oxide-based tailored semiconductor photocatalysts have extensively been used for photocatalytic conversion of carbon dioxide(CO_(2))into fuels and other useful products utilizing solar energy.This is very significant not only from renewable energy consumption but also from reducing global warming point of view.Such current research activities are promising for a better future of society.The present mini-review is focused on recent developments(2–3 years)in metal oxide semiconductor hybrid photocatalysts-based photo-electrochemical conversion of CO_(2)into fuels and other useful products.First,general mechanism of photo-electrochemical conversion of CO_(2)into fuels or other useful products has been discussed.Then,various metal oxide-based emerging hybrid photocatalysts including tailoring of their morphological,compositional,and optoelectronic properties have been discussed with emphasis on their role in enhancing photoelectrochemical efficienty.Afterwards,mechanism of their photo-electrochemical reactions and applications in CO_(2)conversion into fuels/other useful products have been discussed.Finally,challenges and future prospects have been discussed followed by a summary.
基金National Natural Science Foundation of China,Grant/Award Numbers:21875253,51872048,52073061Natural Science Foundation of Fujian Province,Grant/Award Numbers:2021J01430167,2021J02020+2 种基金CAS-Commonwealth Scientific and Industrial Research Organization(CSIRO)Joint Research Projects,Grant/Award Number:121835KYSB20200039Scientific Research and Equipment Development Project of CAS,Grant/Award Number:YJKYYQ20190007Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy,Grant/Award Number:YLU-DNL Fund 2021011。
文摘Sodium-tellurium(Na-Te)battery,thanks to high theoretical capacity and abundant sodium source,has been envisaged as one promising battery technology,its practical application yet faces daunting challenges regarding how to mitigate the critical issues of uncontrollable dendrites growth at Na anode and polytellurides shuttling effect at Te cathode.We here report an elaborative design for fabrication of microsphere skeleton nanohybrids with three-dimensional(3D)hierarchical porous carbon loading CeO_(2)quantum dots(CeO_(2)-QDs/HPC),which feature highly favorable properties of sodiophilic and catalysis for hosting sodium and tellurium,respectively.The systematic investigations coupling with first-principle calculations demonstrate the CeO_(2)-QDs/HPC not only offers favorable structure and abundant electrocatalytic sites for facilitating interconversion between Te and NaxTe as a cathode host,but also can function as dendrite inhibitor anode host for reversible sodium electro-plating/deposition.Such Na-Te battery exhibits admiring electrochemical performance with an impressive specific capacity of 392 mAh g1,a long cycling stability over 1000 cycles,as well as remarkably high energy density of 192 Wh kg1 based on the total mass of anode and cathode.Such proof-of-concept bifunctional host design for active electrode materials can render a new insight and direction to the development of high-performance Na-Te batteries.
基金supported by the National Key R&D Program of China(2016YFB0100100)the National Natural Science Foundation of China(51702335 and 21773279)+8 种基金Zhejiang Non-profit Technology Applied Research Program(LGG19B010001)Ningbo Municipal Natural Science Foundation(2018A610084)the CAS-EU S&T Cooperation Partner Program(174433KYSB20150013)the Key Laboratory of Bio-based Polymeric Materials of Zhejiang Provincethe funding from Marie Sklodowska-Curie Fellowship in EUthe Engineering and Physical Sciences Research Council(EPSRC),including the SUPERGEN Energy Storage Hub(EP/L019469/1)Enabling Next Generation Lithium Batteries(EP/M009521/1)Henry Royce Institute for Advanced Materials(EP/R00661X/1,EP/S019367/1,EP/R010145/1)the Faraday Institution All-Solid-State Batteries with Li and Na Anodes(FIRG007,FIRG008)for financial support。
文摘嵌入型过渡金属氧化物因具有安全的工作电压、高比容量和快速的嵌锂能力而受到广泛关注.但低本征电导率特性严重影响其作为锂电负极材料的寿命和性能.本文通过简便易行、可规模化放大的二氧化碳热处理方法构筑了具有新型嵌覆型碳结构的Nb_(2)O_(5)/C纳米杂化材料.在控制碳含量的前提下,实现了颗粒聚集体内部表面可控碳包覆.以嵌覆型碳结构的Nb_(2)O_(5)/C纳米杂化材料为负极组装的锂离子电池在40 mA g(-1)电流密度下容量可达387 mA hg(-1),而在200 mA g(-1)电流密度下循环500次后,容量保持率在92%以上.采用电化学滴定、差分电化学质谱(DEMS)等方法对嵌覆型五氧化二铌/碳纳米杂化材料脱嵌锂动力学过程以及产气行为进行了研究.本文提出的嵌覆型碳结构有望为高性能嵌入型过渡金属氧化物的结构设计提供参考.
基金the National Natural Science Foundation of China (Nos. 51503014 and 51501008)the Beijing Higher Education Young Elite Teacher Project (No. YETP0419)
文摘Inorganic/organic nanohybrids composed of arrayed TiO_2 nanotubes（Ti NTs）/porphyrin nanoparticles（NPs） have been fabricated via a wet chemical approach. The inorganic component, particularly the arrayed one-dimensional（1D） nanostructures, provides high charge-carrier mobility and rapid charge transport. The organic component exhibits extensive visible light absorption and good solution processability. Additionally, the geometric restraint by supramolecular assembly renders an improved photostability. A combination of these two components could thus allow for an efficient solar energy conversion. In this work, a colloid of porphyrin NPs prepared by a solvent exchange method is coated on anodic Ti NTs by means of a dip-coating treatment to form inorganic/organic hybrids. The hybrids exhibit an improvement on solar absorption and a significant enhancement on photocurrent generation at a small bias compared with individual component. Herein, the inorganic/organic nanohybrids are proved to be excellent photoanodes highly responsive to visible light and thus pave a way to discover new inorganic/organic assemblies for high-performance optoelectronic applications, as well as for device integration.
