A fluorescent active organic–inorganic hybrid material Py N-SBA-15 was synthesized by implementing pyrene derivatives into mesoporous SBA-15 silica.Py N-SBA-15 had detection and removal functionalities toward Al^(3+)...A fluorescent active organic–inorganic hybrid material Py N-SBA-15 was synthesized by implementing pyrene derivatives into mesoporous SBA-15 silica.Py N-SBA-15 had detection and removal functionalities toward Al^(3+),Cu^(2+),and Hg^(2+).On the one hand,Py N-SBA-15 was used as a fluorescence sensor and displayed high sensitivity toward Al^(3+),Cu^(2+),and Hg^(2+)cations (limit of detection:8.0×10^(-7),1.1×10^(-7),and 2.9×10^(-6)mol·L^(–1),respectively) among various analytes with“turn-off”response.On the other hand,the adsorption studies for these toxic analytes (Cu^(2+),Hg^(2+),and Al^(3+)) showed that the ion removal capacity could reach up to 45,581,and 85 mg·g^(-1),respectively.Moreover,the Langmuir isotherm models were better fitted with the adsorption data,indicating that the adsorption was mono-layer adsorption.Kinetic analysis revealed that the adsorption process was well described by the pseudo-second-order kinetic model for Cu^(2+)and Hg^(2+)and pseudo-first-order kinetic model for Al^(3+).The prepared silica material could be reused in four recycles without significantly decreasing its adsorption capacity.Therefore,the Py N-SBA-15 material can serve as a promising candidate for the simultaneous rapid detection and efficient adsorption of metal ions.展开更多
It is economically desirable to develop a material that can simultaneously detect and recover uranium.Herein,a C=C-bridged two-dimensional metal-covalent organic framework(Cu-BTAN-AO MCOF)was constructed by condensati...It is economically desirable to develop a material that can simultaneously detect and recover uranium.Herein,a C=C-bridged two-dimensional metal-covalent organic framework(Cu-BTAN-AO MCOF)was constructed by condensation of metal single crystals with a rigid structure(Cu3(PyCA)3)and cyano monomers(BTAN)via Knoevenagel reaction for simultaneous detection and adsorption of uranium.The amidoxime group within the pore and the presence of unsaturated Cu(I)in the framework facilitate the adsorption of uranyl ions onto the amidoxime group,leading to fluorescence quenching via the photoinduced electron transfer(PET)mechanism,achieving a detection limit of as low as 167 nM uranyl ions.Furthermore,Cu-BTAN-AO demonstrates exceptional efficiency in capturing uranium from wastewater characterized by rapid kinetics and superior selectivity.It is noteworthy that Cu-BTAN-AO is the first example of simultaneous detection,adsorption and chemical reduction of uranium using metal centers and functional groups in MCOF,indicating that Cu-BTAN-AO has great potential for the detection and recovery of uranium-containing wastewater.This design strategy may also be applicable to advancing sensing and energy materials for other important metal ions.展开更多
ABSTRACT Environmental pollutants,including gas phase pollutants,liquid organic pollutants,heavy metal ions,and pathogenic bacteria,pose a serious threat to our ecological environment and human health.Effectively addr...ABSTRACT Environmental pollutants,including gas phase pollutants,liquid organic pollutants,heavy metal ions,and pathogenic bacteria,pose a serious threat to our ecological environment and human health.Effectively addressing these pollutants has become one of the most urgent issues.Graphdiyne(GDY),as an emerging carbon material for environmental remediation,has unique acetylene bonds and abundant pore structures.The unique carbon atomic structure of sp/sp2 hybrid endows it with tunable electronic structure and outstanding physical and chemical properties.This review summarizes the practical applications of GDY-based nanomaterials in the context of environmental pollution control,including carbon monoxide(CO)oxidation,ozone(O_(3))decomposition,heavy metal ion detection and adsorption,organic pollutant degradation,and bacterial inactivation.Furthermore,the structure-performance relationship of GDYbased nanomaterials is analyzed,and the issues and challenges in the field of environmental remediation of GDY-based materials are indicated.展开更多
基金supported by the National Natural Science Foundation of China (21966006)。
文摘A fluorescent active organic–inorganic hybrid material Py N-SBA-15 was synthesized by implementing pyrene derivatives into mesoporous SBA-15 silica.Py N-SBA-15 had detection and removal functionalities toward Al^(3+),Cu^(2+),and Hg^(2+).On the one hand,Py N-SBA-15 was used as a fluorescence sensor and displayed high sensitivity toward Al^(3+),Cu^(2+),and Hg^(2+)cations (limit of detection:8.0×10^(-7),1.1×10^(-7),and 2.9×10^(-6)mol·L^(–1),respectively) among various analytes with“turn-off”response.On the other hand,the adsorption studies for these toxic analytes (Cu^(2+),Hg^(2+),and Al^(3+)) showed that the ion removal capacity could reach up to 45,581,and 85 mg·g^(-1),respectively.Moreover,the Langmuir isotherm models were better fitted with the adsorption data,indicating that the adsorption was mono-layer adsorption.Kinetic analysis revealed that the adsorption process was well described by the pseudo-second-order kinetic model for Cu^(2+)and Hg^(2+)and pseudo-first-order kinetic model for Al^(3+).The prepared silica material could be reused in four recycles without significantly decreasing its adsorption capacity.Therefore,the Py N-SBA-15 material can serve as a promising candidate for the simultaneous rapid detection and efficient adsorption of metal ions.
基金the support from the National Natural Science Foundation of China(22036003,22176082,and 22376023)the Natural Science Foundation of Jiangxi Province(20232BBE50031).
文摘It is economically desirable to develop a material that can simultaneously detect and recover uranium.Herein,a C=C-bridged two-dimensional metal-covalent organic framework(Cu-BTAN-AO MCOF)was constructed by condensation of metal single crystals with a rigid structure(Cu3(PyCA)3)and cyano monomers(BTAN)via Knoevenagel reaction for simultaneous detection and adsorption of uranium.The amidoxime group within the pore and the presence of unsaturated Cu(I)in the framework facilitate the adsorption of uranyl ions onto the amidoxime group,leading to fluorescence quenching via the photoinduced electron transfer(PET)mechanism,achieving a detection limit of as low as 167 nM uranyl ions.Furthermore,Cu-BTAN-AO demonstrates exceptional efficiency in capturing uranium from wastewater characterized by rapid kinetics and superior selectivity.It is noteworthy that Cu-BTAN-AO is the first example of simultaneous detection,adsorption and chemical reduction of uranium using metal centers and functional groups in MCOF,indicating that Cu-BTAN-AO has great potential for the detection and recovery of uranium-containing wastewater.This design strategy may also be applicable to advancing sensing and energy materials for other important metal ions.
基金supported by the National Key Research and Development Program of China(2023YFD1702400)the National Natural Science Fundation of China(32072307)the Fundamental Research Funds of Henan Academy of Sciences(240618045).
文摘ABSTRACT Environmental pollutants,including gas phase pollutants,liquid organic pollutants,heavy metal ions,and pathogenic bacteria,pose a serious threat to our ecological environment and human health.Effectively addressing these pollutants has become one of the most urgent issues.Graphdiyne(GDY),as an emerging carbon material for environmental remediation,has unique acetylene bonds and abundant pore structures.The unique carbon atomic structure of sp/sp2 hybrid endows it with tunable electronic structure and outstanding physical and chemical properties.This review summarizes the practical applications of GDY-based nanomaterials in the context of environmental pollution control,including carbon monoxide(CO)oxidation,ozone(O_(3))decomposition,heavy metal ion detection and adsorption,organic pollutant degradation,and bacterial inactivation.Furthermore,the structure-performance relationship of GDYbased nanomaterials is analyzed,and the issues and challenges in the field of environmental remediation of GDY-based materials are indicated.
