We report the detailed physical properties of quaternary compound Ba2BiFeS5 with the key structural ingredient of isolated FeS4 tetrahedra.Magnetization and heat capacity measurements clearly indicate that Ba2BiFeS5 h...We report the detailed physical properties of quaternary compound Ba2BiFeS5 with the key structural ingredient of isolated FeS4 tetrahedra.Magnetization and heat capacity measurements clearly indicate that Ba2BiFeS5 has a paramagnetic to antiferromagnetic transition at about 30 K.The calculated magnetic entropy above ordering temperature is much smaller than theoretical value for high-spin Fe^3+ion with S=5/2,implying the possible short-range antiferromagnetic fluctuation in Ba2BiFeS5.展开更多
Ferromagnetic Fe3O4 nanoparticles were synthesized using water as the solvent through the sol-gel method, which was selected for its cost-effectiveness, simplicity, and eco-friendly nature. The synthesized nanoparticl...Ferromagnetic Fe3O4 nanoparticles were synthesized using water as the solvent through the sol-gel method, which was selected for its cost-effectiveness, simplicity, and eco-friendly nature. The synthesized nanoparticles were characterized using a variety of techniques, including Fourier Transform Infrared (FTIR) spectroscopy, X-ray powder diffraction (XRD), Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), and Vibrating Sample Magnetometer (VSM). These characterizations confirmed the successful formation of Fe3O4 nanoparticles. The FTIR spectra identified characteristic peaks corresponding to the functional groups present, and XRD analysis, using Scherer’s equation, determined an average crystalline size of 1.2 nm for the Fe3O4 nanoparticles. TGA results demonstrated the thermal stability of the nanoparticles, SEM imaging revealed distinct honeycomb-like structures for the nanoparticles synthesized with water as the solvent, while the VSM analysis was used to determine the magnetic behavior of the nanoparticles.展开更多
Bacterial spores commonly co-exist with vegetative cells,presenting challenges in spore separation and detection.The separation of spores is a crucial process for laboratory research and the detection of spore mechani...Bacterial spores commonly co-exist with vegetative cells,presenting challenges in spore separation and detection.The separation of spores is a crucial process for laboratory research and the detection of spore mechanisms.This study introduced a novel method that leverages the high binding affinity of vancomycin(Van)and ampicillin sodium(Amp)to vegetative cells,integrated with magnetic separation technology,to selectively collect spores from complex environments by eliminating vegetative cells.First,Van/Amp-modified magnetic Fe3O4 nanoparticles(Fe₃O4 NPs)were synthesized and characterized.Subsequently,these NPs bound vegetative cells,forming magnetic conjugates that could be efficiently removed using a magnetic field.Concurrently,spores were collected with an efficiency exceeding 95%,completing the entire process within 30 min and achieving a spore separation efficiency of up to 10^(5) CFU/mL.This method was successfully applied to actual samples,including tap water and milk.The state of the collected spores was confirmed using Raman spectroscopy and microscopic techniques,verifying that their characteristics matched those of typical spores.The proposed novel method for rapid spore separation,leveraging the"remove bacterial effect'facilitated by Van/Amp-Fe3O4 NPs,showed outstanding spore collection capabilities while preserving the excellent physiological state of spores.展开更多
Herein,binary and ternary MOF/carbon based composites(MOF/Carbon nitride/Graphene oxide)(novel binary(NH_(2)-MIL-88B(Fe)/g-C_(3)N_(4))(MOF/Carbon nitride)and ternary(NH_(2)-MIL-88B(Fe)/g-C_(3)N_(4)/GO)(MOF/Carbon nitr...Herein,binary and ternary MOF/carbon based composites(MOF/Carbon nitride/Graphene oxide)(novel binary(NH_(2)-MIL-88B(Fe)/g-C_(3)N_(4))(MOF/Carbon nitride)and ternary(NH_(2)-MIL-88B(Fe)/g-C_(3)N_(4)/GO)(MOF/Carbon nitride/Graphene oxide)composites)were synthesized and used as photocatalysts for the elimination of Direct Red 23(D-Red23)and Tetracycline Hydrochloride(TC-H).NH_(2)-MIL-88B(Fe)/g-C_(3)N_(4)/GO(MILB/g/GO)ternary composites with three different amounts of GO including 3,7,and 11 wt%were synthesized and denoted as MILB/g/(3%)GO,MILB/g/(7%)GO,and MILB/g/(11%)GO.g-C_(3)N_(4)and GO(with three different amounts 3,7,and 11 wt%)were incorporated to synthesize MILB/g/(3%)GO,MILB/g/(7%)GO and MILB/g/(11%)GO ternary composites.Several analyses were used to characterize the materials.The MILB/g/(3%)GO demonstrated the highest pollutant degradation efficiency.The degradation rate of dye and Tetracycline after 70 min of light radiation using MILB/g/(3%)GO in a photo-Fenton-like reaction was about 99%and 96%,respectively.The creation of a heterojunction structure using g-C_(3)N_(4),and the simultaneous incorporation of the optimum amount of GO led to a remarkable amelioration in photocatalytic properties and the extraordinary performance of MILB/g/(3%)GO in the pollutants degradation process.展开更多
基金Project supported by the National Key Research and Development Program of China(Grant No.2016YFA0300504)the National Natural Science Foundation of China(Grant Nos.11574394,11774423,and 11822412)+1 种基金the Fundamental Research Funds for the Central Universitiesthe Research Funds of Renmin University of China(RUC)(Grant Nos.15XNLQ07,18XNLG14,and 19XNLG17)
文摘We report the detailed physical properties of quaternary compound Ba2BiFeS5 with the key structural ingredient of isolated FeS4 tetrahedra.Magnetization and heat capacity measurements clearly indicate that Ba2BiFeS5 has a paramagnetic to antiferromagnetic transition at about 30 K.The calculated magnetic entropy above ordering temperature is much smaller than theoretical value for high-spin Fe^3+ion with S=5/2,implying the possible short-range antiferromagnetic fluctuation in Ba2BiFeS5.
文摘Ferromagnetic Fe3O4 nanoparticles were synthesized using water as the solvent through the sol-gel method, which was selected for its cost-effectiveness, simplicity, and eco-friendly nature. The synthesized nanoparticles were characterized using a variety of techniques, including Fourier Transform Infrared (FTIR) spectroscopy, X-ray powder diffraction (XRD), Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), and Vibrating Sample Magnetometer (VSM). These characterizations confirmed the successful formation of Fe3O4 nanoparticles. The FTIR spectra identified characteristic peaks corresponding to the functional groups present, and XRD analysis, using Scherer’s equation, determined an average crystalline size of 1.2 nm for the Fe3O4 nanoparticles. TGA results demonstrated the thermal stability of the nanoparticles, SEM imaging revealed distinct honeycomb-like structures for the nanoparticles synthesized with water as the solvent, while the VSM analysis was used to determine the magnetic behavior of the nanoparticles.
基金supported by the General Program of National Natural Science Foundation of China(32472417)the Major Science and Technology Projects in Henan Province(221100110500,231100110400)+2 种基金the Science and Technology Innovation Team of Henan Universities(22IRTSTHN021)the Science and Technology of Henan Province(232102110136)Henan Provincial Joint Fund(Science and Technology Tackling)Category(232103810023).
文摘Bacterial spores commonly co-exist with vegetative cells,presenting challenges in spore separation and detection.The separation of spores is a crucial process for laboratory research and the detection of spore mechanisms.This study introduced a novel method that leverages the high binding affinity of vancomycin(Van)and ampicillin sodium(Amp)to vegetative cells,integrated with magnetic separation technology,to selectively collect spores from complex environments by eliminating vegetative cells.First,Van/Amp-modified magnetic Fe3O4 nanoparticles(Fe₃O4 NPs)were synthesized and characterized.Subsequently,these NPs bound vegetative cells,forming magnetic conjugates that could be efficiently removed using a magnetic field.Concurrently,spores were collected with an efficiency exceeding 95%,completing the entire process within 30 min and achieving a spore separation efficiency of up to 10^(5) CFU/mL.This method was successfully applied to actual samples,including tap water and milk.The state of the collected spores was confirmed using Raman spectroscopy and microscopic techniques,verifying that their characteristics matched those of typical spores.The proposed novel method for rapid spore separation,leveraging the"remove bacterial effect'facilitated by Van/Amp-Fe3O4 NPs,showed outstanding spore collection capabilities while preserving the excellent physiological state of spores.
基金This manuscript is extracted from project(981179017)funded by Institute for Color Science and Technology.
文摘Herein,binary and ternary MOF/carbon based composites(MOF/Carbon nitride/Graphene oxide)(novel binary(NH_(2)-MIL-88B(Fe)/g-C_(3)N_(4))(MOF/Carbon nitride)and ternary(NH_(2)-MIL-88B(Fe)/g-C_(3)N_(4)/GO)(MOF/Carbon nitride/Graphene oxide)composites)were synthesized and used as photocatalysts for the elimination of Direct Red 23(D-Red23)and Tetracycline Hydrochloride(TC-H).NH_(2)-MIL-88B(Fe)/g-C_(3)N_(4)/GO(MILB/g/GO)ternary composites with three different amounts of GO including 3,7,and 11 wt%were synthesized and denoted as MILB/g/(3%)GO,MILB/g/(7%)GO,and MILB/g/(11%)GO.g-C_(3)N_(4)and GO(with three different amounts 3,7,and 11 wt%)were incorporated to synthesize MILB/g/(3%)GO,MILB/g/(7%)GO and MILB/g/(11%)GO ternary composites.Several analyses were used to characterize the materials.The MILB/g/(3%)GO demonstrated the highest pollutant degradation efficiency.The degradation rate of dye and Tetracycline after 70 min of light radiation using MILB/g/(3%)GO in a photo-Fenton-like reaction was about 99%and 96%,respectively.The creation of a heterojunction structure using g-C_(3)N_(4),and the simultaneous incorporation of the optimum amount of GO led to a remarkable amelioration in photocatalytic properties and the extraordinary performance of MILB/g/(3%)GO in the pollutants degradation process.
