Mixed matrix membranes(MMMs)could combine the advantages of both polymeric membranes and porousfillers,making them an effective alternative to conventional polymer membranes.However,interfacial incompatibility issues,s...Mixed matrix membranes(MMMs)could combine the advantages of both polymeric membranes and porousfillers,making them an effective alternative to conventional polymer membranes.However,interfacial incompatibility issues,such as the presence of interfacial voids,hardening of polymer chains,and blockage of micropores by polymers between common MMMsfillers and the polymer matrix,currently limit the gas sep-aration performance of MMMs.Ternary phase MMMs(consisting of afiller,an additive,and a matrix)made by adding a third compound,usually functionalized additives,can overcome the structural problems of binary phase MMMs and positively impact membrane separation performance.This review introduces the structure and fabrication processes for ternary MMMs,categorizes various nanofillers and the third component,and summarizes and analyzes in detail the CO_(2) separation performance of newly developed ternary MMMs based on both rubbery and glassy polymers.Based on this separation data,the challenges of ternary MMMs are also discussed.Finally,future directions for ternary MMMs are proposed.展开更多
The properties of Pbn(n=2―30) clusters including binding energies,second differences in energy,and HOMO-LUMO gaps,especially fragmentation energies and ionization potentials,have been studied by ab initio calculati...The properties of Pbn(n=2―30) clusters including binding energies,second differences in energy,and HOMO-LUMO gaps,especially fragmentation energies and ionization potentials,have been studied by ab initio calculation.The main fragmentation products of Pbn+ are shown to be Pb+Pbn-1+ for n≤14 and two small cluster fragments for larger ones with n14.The Pb13+ appears frequently as the products in the fragmentations of large clusters.Also,the calculated ionization potentials of the clusters are consistent with the experiment data.展开更多
As a significant semiconductor,nickel selenide shows enormous potential and extensive application pro spects in the field of sensor,photocatalysis and supercapacito r.In this paper,nickel selenide(Ni3Se2,NiSe) thin fi...As a significant semiconductor,nickel selenide shows enormous potential and extensive application pro spects in the field of sensor,photocatalysis and supercapacito r.In this paper,nickel selenide(Ni3Se2,NiSe) thin films were successfully fabricated on stainless-steel sheet using a facile,effective electrodeposition technique.The morphologies,microstructures and chemical compositions of the thin films are characterized systematically.Electrochemical tests exhibit that the Ni3Se2 and NiSe possess high specific capacitance of 581.1 F/g and 1644.7 F/g,respectively.A flexible,all-solid-state asymmetric supercapacitor is assembled by utilizing NiSe film as positive electrode and activated carbon as negative electrode.The solid device delivers a high areal capacitance of 27.0 mF/cm2 at the current density of 0.7 mA/cm2.The maximum volumetric energy density and powerdensity of the NiSe//AC asymmetric SCs can achieve 0.26 mWh/cm3 and 33.35 mW/cm3,respectively.The device shows robust cycling stability with 84.6% capacitance retention after 10,000 cycles,outstanding flexibility and satis factory mechanical stability.Moreover,two devices in series can light up a red light-emitting diode,which displayed great potential applications for energy storage.展开更多
Fast-neutron (FN) irradiation has been used to create mutagen- ized collections of many plant species (Bolon et al., 2014), FN- induced mutagenesis has clear advantages: it is an efficient means of saturating the...Fast-neutron (FN) irradiation has been used to create mutagen- ized collections of many plant species (Bolon et al., 2014), FN- induced mutagenesis has clear advantages: it is an efficient means of saturating the genome, and it does not involve time- consuming plant transformation or tissue culture. In rice, most mutant collections, although highly valuable, were generated us- ing either T-DNA insertion or transposon tagging approaches that often induce mutations unlinked to the insertion and complicating analysis (Wang et al., 2013). Another disadvantage of some of these collections is that they were created in rice varieties that are photoperiod-sensitive and often have long generation times.展开更多
基金support from Sichuan Science and Technology Program(2021YFH0116)National Natural Science Foundation of China(No.52170112)DongFang Boiler Co.,Ltd.(3522015).
文摘Mixed matrix membranes(MMMs)could combine the advantages of both polymeric membranes and porousfillers,making them an effective alternative to conventional polymer membranes.However,interfacial incompatibility issues,such as the presence of interfacial voids,hardening of polymer chains,and blockage of micropores by polymers between common MMMsfillers and the polymer matrix,currently limit the gas sep-aration performance of MMMs.Ternary phase MMMs(consisting of afiller,an additive,and a matrix)made by adding a third compound,usually functionalized additives,can overcome the structural problems of binary phase MMMs and positively impact membrane separation performance.This review introduces the structure and fabrication processes for ternary MMMs,categorizes various nanofillers and the third component,and summarizes and analyzes in detail the CO_(2) separation performance of newly developed ternary MMMs based on both rubbery and glassy polymers.Based on this separation data,the challenges of ternary MMMs are also discussed.Finally,future directions for ternary MMMs are proposed.
基金Supported by the National Natural Science Foundation of China(Nos.20773047 and 21043001)
文摘The properties of Pbn(n=2―30) clusters including binding energies,second differences in energy,and HOMO-LUMO gaps,especially fragmentation energies and ionization potentials,have been studied by ab initio calculation.The main fragmentation products of Pbn+ are shown to be Pb+Pbn-1+ for n≤14 and two small cluster fragments for larger ones with n14.The Pb13+ appears frequently as the products in the fragmentations of large clusters.Also,the calculated ionization potentials of the clusters are consistent with the experiment data.
基金supported by the Fundamental Research Funds for the Central Universities(Nos.2018B19714 and 2019B02614)Natural Science Foundation of China(No.51775253)supported by the Department of Energy,Division of Materials Sciences&Engineering(No.DE-AC0207CH11358)。
文摘As a significant semiconductor,nickel selenide shows enormous potential and extensive application pro spects in the field of sensor,photocatalysis and supercapacito r.In this paper,nickel selenide(Ni3Se2,NiSe) thin films were successfully fabricated on stainless-steel sheet using a facile,effective electrodeposition technique.The morphologies,microstructures and chemical compositions of the thin films are characterized systematically.Electrochemical tests exhibit that the Ni3Se2 and NiSe possess high specific capacitance of 581.1 F/g and 1644.7 F/g,respectively.A flexible,all-solid-state asymmetric supercapacitor is assembled by utilizing NiSe film as positive electrode and activated carbon as negative electrode.The solid device delivers a high areal capacitance of 27.0 mF/cm2 at the current density of 0.7 mA/cm2.The maximum volumetric energy density and powerdensity of the NiSe//AC asymmetric SCs can achieve 0.26 mWh/cm3 and 33.35 mW/cm3,respectively.The device shows robust cycling stability with 84.6% capacitance retention after 10,000 cycles,outstanding flexibility and satis factory mechanical stability.Moreover,two devices in series can light up a red light-emitting diode,which displayed great potential applications for energy storage.
文摘Fast-neutron (FN) irradiation has been used to create mutagen- ized collections of many plant species (Bolon et al., 2014), FN- induced mutagenesis has clear advantages: it is an efficient means of saturating the genome, and it does not involve time- consuming plant transformation or tissue culture. In rice, most mutant collections, although highly valuable, were generated us- ing either T-DNA insertion or transposon tagging approaches that often induce mutations unlinked to the insertion and complicating analysis (Wang et al., 2013). Another disadvantage of some of these collections is that they were created in rice varieties that are photoperiod-sensitive and often have long generation times.