Biofouling has been a persistent problem in marine riser system, resulting in energy waste and equipment damage. Inthis study, a kind of water wave-driven contact-mode flexible triboelectric nanogeneration has been pr...Biofouling has been a persistent problem in marine riser system, resulting in energy waste and equipment damage. Inthis study, a kind of water wave-driven contact-mode flexible triboelectric nanogeneration has been prepared byusing graphene-doped PDMS as dielectric friction material. When the graphene content is 2%, the average outputvoltage can reach 46 V under the contact frequency 10 Hz. The flexible triboelectric nanogeneration encapsulationmodule is impinged by water waves to generate alternating microelectric field on the riser surface and destroy theadhesion conditions of microorganisms during the biofilm stage. In the biofouling experiments at different stages, thebiofouling area of the platymonas subcordiformis has been reduced by 53%, 62% and 61%. It provides a new ideafor effective treatment of biofouling of mussels, oysters and barnacles attached to risers.展开更多
By introducing piezoelectric materials into hydrogel oral dressings,a microelectric field could be generated under stress stimulation,thus facilitating oral wound healing.However,to adapt to the moist and dynamic envi...By introducing piezoelectric materials into hydrogel oral dressings,a microelectric field could be generated under stress stimulation,thus facilitating oral wound healing.However,to adapt to the moist and dynamic environment of the oral cavity,traditional"step-by-step"synthesis often requires the combination of materials with different functionalities.Given the property differences between these materials,this strategy typically involves complex experimental procedures and unnecessary energy consumption.In this study,with the concept of"integrated construction",we innovatively proposed a dual-step photo-induced method and successfully fabricated composite hydrogels with excellent performance.We introduced abundant oxygen vacancies into ZnO,leveraging the enhanced interface dynamics to achieve sustained photo-induced effect.With a double-network polymer framework as a template,this method could achieve the photo-induced spontaneous in-situ synthesis of polydopamine(PDA)within hydrogel without any extra special experimental conditions and complex operation procedures.We conducted a thorough analysis of the mechanism underlying this photo-induced method and applied the as-prepared hydrogel for the treatment of oral wounds,which significantly accelerated the healing process due to the outstanding comprehensive performance of hydrogel.These results suggest novel ideas and theoretical support for the facile construction of high-performance hydrogels based on photodynamic principles,demonstrating immense potential for future applications in wound dressings.展开更多
In response to the limitedworking capacity and poor energy interaction efficiency of microgrids,it is now common to use multiple microgrids to form microgrid clusters to enhance the reliability of power supply between...In response to the limitedworking capacity and poor energy interaction efficiency of microgrids,it is now common to use multiple microgrids to form microgrid clusters to enhance the reliability of power supply between each other and further improve the penetration rate of distributed power sources.This article focuses on the energy development method of microgrid groups and the problem of scheduling optimization of integrated energy system is discussed for hot and cold electricity within the microgrid group.Firstly,the basic composition ideas of the electric heating interconnection system,electrical interconnection system,and cold and hot electrical interconnection system within the microgrid group were designed layer by layer,and the functional characteristics of the energy equipment within the microgrid group were clarified.Then,in response to the impact of wind and solar uncertainty on system operation,the goal cascading method and robust stochastic optimization method are used to gradually construct a coupled scheduling model for electric heating,a multi-objective scheduling model for electrical interconnection,and a coordinated scheduling optimization model for cold and hot electrical interconnection.Finally,the effectiveness and applicability of the proposed model were verified through case analysis of the relevant models mentioned above,and key factors were selected for sensitivity analysis,providing reliable methodological support for optimizing the operation of an integrated energy system.展开更多
The activation of inert oxygen(O_(2))often consumes enormous amounts of energy and resources,which is a global challenge in the field of environmental remediation and fuel cells.Organic pollutants are abundant in elec...The activation of inert oxygen(O_(2))often consumes enormous amounts of energy and resources,which is a global challenge in the field of environmental remediation and fuel cells.Organic pollutants are abundant in electrons and are promising alternative electron donors.Herein,we implement sustainable microactivation of dissolved oxygen(DO)by using the electrons and adsorption energy of pollutants by creating a nonequilibrium microsurface on nanoparticle-integrated molybdenum(Mo)lattice-doped zinc sulfide(ZnS)composites(MZS-1).Organic pollutants were quickly removed by DO microactivation in the MZS-1 system under natural conditions without any additional energy or electron donor.The turnover frequency(TOF,per Mo atom basis)is 5 orders of magnitude higher than those of homogeneous systems.Structural and electronic characterization technologies reveal the change in the crystalline phase(Zn-S-Mo)and the activation of π-electrons on six-membered rings of ZnS after Mo doping,which results in the formation of a nonequilibrium microsurface on MZS-1.This is the key for the strong interfacial interaction and directional electron transfer from pollutants to MZS-1 through the delocalized π-π conjugation effect and from MZS-1 to DO via Zn-S-Mo,as demonstrated by electron paramagnetic resonance(EPR)techniques and density functional theory(DFT)calculations.This process achieves the efficient use of pollutants and the low-energy activation of O_(2) through the construction of a nonequilibrium microsurface,which shows new significance for water treatment.展开更多
基金supported by the National Key Research and Development Program of China(Grant No.2021YFB3401400)。
文摘Biofouling has been a persistent problem in marine riser system, resulting in energy waste and equipment damage. Inthis study, a kind of water wave-driven contact-mode flexible triboelectric nanogeneration has been prepared byusing graphene-doped PDMS as dielectric friction material. When the graphene content is 2%, the average outputvoltage can reach 46 V under the contact frequency 10 Hz. The flexible triboelectric nanogeneration encapsulationmodule is impinged by water waves to generate alternating microelectric field on the riser surface and destroy theadhesion conditions of microorganisms during the biofilm stage. In the biofouling experiments at different stages, thebiofouling area of the platymonas subcordiformis has been reduced by 53%, 62% and 61%. It provides a new ideafor effective treatment of biofouling of mussels, oysters and barnacles attached to risers.
基金supported by the National Key R&D Program of China(2021YFB2012601)National Natural Science Foundation of China(No.U2230108)+2 种基金Shanghai Science and Technology Innovation Action Medical Innovation Research Project(23Y11910100)Shanghai Stomatological Hospital Institutional Project(Grant No.SSH-2022-02,SHH-2022-YJ-07,SSH-2023-02)Medical Engineering Integration Project of Fudan University.
文摘By introducing piezoelectric materials into hydrogel oral dressings,a microelectric field could be generated under stress stimulation,thus facilitating oral wound healing.However,to adapt to the moist and dynamic environment of the oral cavity,traditional"step-by-step"synthesis often requires the combination of materials with different functionalities.Given the property differences between these materials,this strategy typically involves complex experimental procedures and unnecessary energy consumption.In this study,with the concept of"integrated construction",we innovatively proposed a dual-step photo-induced method and successfully fabricated composite hydrogels with excellent performance.We introduced abundant oxygen vacancies into ZnO,leveraging the enhanced interface dynamics to achieve sustained photo-induced effect.With a double-network polymer framework as a template,this method could achieve the photo-induced spontaneous in-situ synthesis of polydopamine(PDA)within hydrogel without any extra special experimental conditions and complex operation procedures.We conducted a thorough analysis of the mechanism underlying this photo-induced method and applied the as-prepared hydrogel for the treatment of oral wounds,which significantly accelerated the healing process due to the outstanding comprehensive performance of hydrogel.These results suggest novel ideas and theoretical support for the facile construction of high-performance hydrogels based on photodynamic principles,demonstrating immense potential for future applications in wound dressings.
文摘In response to the limitedworking capacity and poor energy interaction efficiency of microgrids,it is now common to use multiple microgrids to form microgrid clusters to enhance the reliability of power supply between each other and further improve the penetration rate of distributed power sources.This article focuses on the energy development method of microgrid groups and the problem of scheduling optimization of integrated energy system is discussed for hot and cold electricity within the microgrid group.Firstly,the basic composition ideas of the electric heating interconnection system,electrical interconnection system,and cold and hot electrical interconnection system within the microgrid group were designed layer by layer,and the functional characteristics of the energy equipment within the microgrid group were clarified.Then,in response to the impact of wind and solar uncertainty on system operation,the goal cascading method and robust stochastic optimization method are used to gradually construct a coupled scheduling model for electric heating,a multi-objective scheduling model for electrical interconnection,and a coordinated scheduling optimization model for cold and hot electrical interconnection.Finally,the effectiveness and applicability of the proposed model were verified through case analysis of the relevant models mentioned above,and key factors were selected for sensitivity analysis,providing reliable methodological support for optimizing the operation of an integrated energy system.
基金financially supported by the National Natural Science Foundation of China(52122009,52070046 and 51838005)the Introduced Innovative Research and Development Team Project under the“Pearl River Talent Recruitment Program”of Guangdong Province(2019ZT08L387)+2 种基金the National College Students’Innovation and Entrepreneurship Training Program,China(202111078021,202111078019,and 202011078019)the Special Funds for the Cultivation of Guangdong College Students’Scientific and Technological Innovation-“Climbing Program”Special Funds(pdjh2021b0395)the Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme(Young Scholar).
文摘The activation of inert oxygen(O_(2))often consumes enormous amounts of energy and resources,which is a global challenge in the field of environmental remediation and fuel cells.Organic pollutants are abundant in electrons and are promising alternative electron donors.Herein,we implement sustainable microactivation of dissolved oxygen(DO)by using the electrons and adsorption energy of pollutants by creating a nonequilibrium microsurface on nanoparticle-integrated molybdenum(Mo)lattice-doped zinc sulfide(ZnS)composites(MZS-1).Organic pollutants were quickly removed by DO microactivation in the MZS-1 system under natural conditions without any additional energy or electron donor.The turnover frequency(TOF,per Mo atom basis)is 5 orders of magnitude higher than those of homogeneous systems.Structural and electronic characterization technologies reveal the change in the crystalline phase(Zn-S-Mo)and the activation of π-electrons on six-membered rings of ZnS after Mo doping,which results in the formation of a nonequilibrium microsurface on MZS-1.This is the key for the strong interfacial interaction and directional electron transfer from pollutants to MZS-1 through the delocalized π-π conjugation effect and from MZS-1 to DO via Zn-S-Mo,as demonstrated by electron paramagnetic resonance(EPR)techniques and density functional theory(DFT)calculations.This process achieves the efficient use of pollutants and the low-energy activation of O_(2) through the construction of a nonequilibrium microsurface,which shows new significance for water treatment.
