Abstract:Graphene-Based separation membranes hold promise for water treatment.However,their practical deployment in high-salinity brines remains challenging due to structural instability.Herein,a defect-free Na^(+)-Cu...Abstract:Graphene-Based separation membranes hold promise for water treatment.However,their practical deployment in high-salinity brines remains challenging due to structural instability.Herein,a defect-free Na^(+)-Cu^(2+)/GO-PEI nanocomposite membrane was fabricated via a pH-controlled cross-linking polymerization strategy.Polyethyleneimine(PEI)serves as a critical interfacial stabilizer,enhancing the connection between the Na^(+)-GO and Cu^(2+)-GO layers through amide bond formation with GO nanosheets while facilitating Cu^(2+)chelation.The Na^(+)/GO layer modifies the pore structure of the polyether sulfone(PES)substrate,synergistically optimizing the membrane’s microstructure.Performances evaluation revealed that the as-prepared membrane achieved exceptional separation efficiency(>98%)for tributyl phosphate,sulfonated kerosene,and bis(2-ethylhexyl)phosphate in high-salinity brine,accompanied by a high flux of 160~224 L·m^(-2)·h^(-1).Notably,it exhibited robust chemical stability in corrosive environment and maintained mechanical durability after 500 folding cycles coupled with consistent separation performances over 10 recycles.This study presents a novel multi-component modification approach for constructing high-performance GObased membrane,promising practical applications in organic pollutant removal from high salt solution.展开更多
U SB( U niversal Serial Bus)经过了 9年发展 ,已经得到了市场的认可 ,其传输速度达到了最大 480 Mb/s的惊人地步 ,而 USB OTG ( On The Go)的推出更是鼓舞人心 ,其双重角色的强大功能可以使 U SB设备摆脱对 PC的完全依赖。 USB OTG是 ...U SB( U niversal Serial Bus)经过了 9年发展 ,已经得到了市场的认可 ,其传输速度达到了最大 480 Mb/s的惊人地步 ,而 USB OTG ( On The Go)的推出更是鼓舞人心 ,其双重角色的强大功能可以使 U SB设备摆脱对 PC的完全依赖。 USB OTG是 U SB 2 .0规范的补充 ,他使外设可以在无主机参与的情况下直接互连进行通信工程。本文简单介绍了 U SB OTG的工作原理 ,并分析了现在 U SB OTG的应用情况 ,重点针对数码相机伴侣存在的问题 。展开更多
基金Special Research Assistant Program,China(2024000020)the Science and Technology Department of Qinghai Province,China(2024-ZJ-918)the“Kunlun Talents”Program of Qinghai(2024000075)。
文摘Abstract:Graphene-Based separation membranes hold promise for water treatment.However,their practical deployment in high-salinity brines remains challenging due to structural instability.Herein,a defect-free Na^(+)-Cu^(2+)/GO-PEI nanocomposite membrane was fabricated via a pH-controlled cross-linking polymerization strategy.Polyethyleneimine(PEI)serves as a critical interfacial stabilizer,enhancing the connection between the Na^(+)-GO and Cu^(2+)-GO layers through amide bond formation with GO nanosheets while facilitating Cu^(2+)chelation.The Na^(+)/GO layer modifies the pore structure of the polyether sulfone(PES)substrate,synergistically optimizing the membrane’s microstructure.Performances evaluation revealed that the as-prepared membrane achieved exceptional separation efficiency(>98%)for tributyl phosphate,sulfonated kerosene,and bis(2-ethylhexyl)phosphate in high-salinity brine,accompanied by a high flux of 160~224 L·m^(-2)·h^(-1).Notably,it exhibited robust chemical stability in corrosive environment and maintained mechanical durability after 500 folding cycles coupled with consistent separation performances over 10 recycles.This study presents a novel multi-component modification approach for constructing high-performance GObased membrane,promising practical applications in organic pollutant removal from high salt solution.
文摘U SB( U niversal Serial Bus)经过了 9年发展 ,已经得到了市场的认可 ,其传输速度达到了最大 480 Mb/s的惊人地步 ,而 USB OTG ( On The Go)的推出更是鼓舞人心 ,其双重角色的强大功能可以使 U SB设备摆脱对 PC的完全依赖。 USB OTG是 U SB 2 .0规范的补充 ,他使外设可以在无主机参与的情况下直接互连进行通信工程。本文简单介绍了 U SB OTG的工作原理 ,并分析了现在 U SB OTG的应用情况 ,重点针对数码相机伴侣存在的问题 。
