In this work,a facile"carbonization-activation"strategy is developed to synthesize N,P-codoped hierarchical porous carbon.Phosphoric acid is innovatively introduced during the hydrothermal process to achieve...In this work,a facile"carbonization-activation"strategy is developed to synthesize N,P-codoped hierarchical porous carbon.Phosphoric acid is innovatively introduced during the hydrothermal process to achieve in-situ P doping as well as create abundant pores,and the employment of sodamide is of vital importance to simultaneously serve as activating agent and N-source to succeed a high-level N doping.Thus,the obtained samples exhibit a unique three-dimensional hierarchical structure with an ultra-high specific surface area(3646 m^(2)g^(-1))and ultra-high N-doping level(9.81 at.%).Computational analyses confirm that N,P co-doping and higher N content can enhance active sites and widen potential differences of carbon materials to improve their capacitance.The as-prepared carbon materials demonstrate superior electrochemical performances,such as an ultra-high capacitance of 586 Fg^(-1)at 1 Ag^(-1),a superior rate capability of 409 Fg^(-1)at 20 Ag^(-1),and excellent long-term stability of 97%capacitance retention after10,000 cycles in 6 M KOH.Moreover,an assembled symmetric supercapacitor delivers a high energy density of 28.1 Wh kg^(-1)at the power density of 450 W kg^(-1)in 1 M Na_(2)SO_(4),demonstrating a great potential for applications in supercapacitors.展开更多
Dear Editor Human pluripotent stem cells including human embryonic stem cells （ESCs） and induced pluripotent stem cells （iPSCs） are cells displaying abilities of unlimited self-renewal and differentiation into any...Dear Editor Human pluripotent stem cells including human embryonic stem cells （ESCs） and induced pluripotent stem cells （iPSCs） are cells displaying abilities of unlimited self-renewal and differentiation into any somatic cell type. These unique properties make them increasingly attractive for novel applications in disease modeling, drug discovery, and cell therapy （Buganim et al., 2014; Liu et al., 2011; Liu et al., 2012; Sanchez Alvarado and Yamanaka, 2014）. Moreover, iPSCs hold great potential for personalized cell therapy as they avoid some of the ethical concerns as well as the immunological rejection issues ascribed to ESCs.展开更多
MIL-101(Cr)has a special pore cage structure that provides broad channels for the transport of water molecules in the reverse osmosis(RO)water separation and purification.Combining MIL-101(Cr)with Fe_(3)O_(4) nanopart...MIL-101(Cr)has a special pore cage structure that provides broad channels for the transport of water molecules in the reverse osmosis(RO)water separation and purification.Combining MIL-101(Cr)with Fe_(3)O_(4) nanoparticles forms a water transport intermediate layer between the polyamide separation membrane and the polysulfone support base under an external magnetic field.MiL-101(Cr)is stable in both water and air while resistant to high temperature.With the introduction of 0.003 wt.%MIL-101(Cr)/Fe_(3)O_(4),the water flux increased by 93.31%to 6.65 L·m^(-2)·h^(-1)·bar^(-1) without sacrificing the NaCl rejection of 95.88%.The MIL-101(Cr)/Fe_(3)O_(4) multilayer membrane also demonstrated certain anti-pollution properties and excellent stability in a 72-h test.Therefore,the construction of a MIL-101(Cr)/Fe_(3)O_(4) interlayer can effectively improve the permeability of RO composite membranes.展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.21776147,21606140,61604086,and 21905153)the Qingdao Municipal Science and Technology Bureau,China(19-6-1-91-nsh)+2 种基金the International Science&Technology Cooperation Program of China(No.2014DFA60150)the Department of Science and Technology of Shandong Province(Nos.ZR2018BB066 and 2016GGX104010)the Chemcloudcomputing of National Supercomputing Center in Shenzhen(Shenzhen CloudComputing Center)。
文摘In this work,a facile"carbonization-activation"strategy is developed to synthesize N,P-codoped hierarchical porous carbon.Phosphoric acid is innovatively introduced during the hydrothermal process to achieve in-situ P doping as well as create abundant pores,and the employment of sodamide is of vital importance to simultaneously serve as activating agent and N-source to succeed a high-level N doping.Thus,the obtained samples exhibit a unique three-dimensional hierarchical structure with an ultra-high specific surface area(3646 m^(2)g^(-1))and ultra-high N-doping level(9.81 at.%).Computational analyses confirm that N,P co-doping and higher N content can enhance active sites and widen potential differences of carbon materials to improve their capacitance.The as-prepared carbon materials demonstrate superior electrochemical performances,such as an ultra-high capacitance of 586 Fg^(-1)at 1 Ag^(-1),a superior rate capability of 409 Fg^(-1)at 20 Ag^(-1),and excellent long-term stability of 97%capacitance retention after10,000 cycles in 6 M KOH.Moreover,an assembled symmetric supercapacitor delivers a high energy density of 28.1 Wh kg^(-1)at the power density of 450 W kg^(-1)in 1 M Na_(2)SO_(4),demonstrating a great potential for applications in supercapacitors.
文摘Dear Editor Human pluripotent stem cells including human embryonic stem cells （ESCs） and induced pluripotent stem cells （iPSCs） are cells displaying abilities of unlimited self-renewal and differentiation into any somatic cell type. These unique properties make them increasingly attractive for novel applications in disease modeling, drug discovery, and cell therapy （Buganim et al., 2014; Liu et al., 2011; Liu et al., 2012; Sanchez Alvarado and Yamanaka, 2014）. Moreover, iPSCs hold great potential for personalized cell therapy as they avoid some of the ethical concerns as well as the immunological rejection issues ascribed to ESCs.
基金supported by the National Natural Science Foundation of China(Grant Nos.22308183,21776147,21905153,61604086,22378221,and 52002198)the Natural Science Foundation of Shandong Province(Grant Nos.ZR2023QB070 and ZR2021YQ32)+4 种基金the Taishan Scholar Project of Shandong Province(Grant No.tsqn201909117)the Qingdao Science and Technology Benefit the People Demonstration and Guidance Special Project(Grant No.23-2-8-cspz-11-nsh)the Qingdao Natural Science Foundation(Grant No.23-2-1-241-zyyd-jch)the China Postdoctoral Science Foundation(Grant No.2023M731856)Prof.Lifeng Dong also thanks financial support from the Malmstrom Endowed Fund at Hamline University。
文摘MIL-101(Cr)has a special pore cage structure that provides broad channels for the transport of water molecules in the reverse osmosis(RO)water separation and purification.Combining MIL-101(Cr)with Fe_(3)O_(4) nanoparticles forms a water transport intermediate layer between the polyamide separation membrane and the polysulfone support base under an external magnetic field.MiL-101(Cr)is stable in both water and air while resistant to high temperature.With the introduction of 0.003 wt.%MIL-101(Cr)/Fe_(3)O_(4),the water flux increased by 93.31%to 6.65 L·m^(-2)·h^(-1)·bar^(-1) without sacrificing the NaCl rejection of 95.88%.The MIL-101(Cr)/Fe_(3)O_(4) multilayer membrane also demonstrated certain anti-pollution properties and excellent stability in a 72-h test.Therefore,the construction of a MIL-101(Cr)/Fe_(3)O_(4) interlayer can effectively improve the permeability of RO composite membranes.
