Generally,a microemulsion consists of oil,water,surfactant and sometimes cosurfactant.Herein,we report a novel suffactant-free microemulsion（denoted as SFME） composed of benzene,water and ethanol without the amphiph...Generally,a microemulsion consists of oil,water,surfactant and sometimes cosurfactant.Herein,we report a novel suffactant-free microemulsion（denoted as SFME） composed of benzene,water and ethanol without the amphiphilic molecular structure of traditional surfactant.The phase behavior of the ternary system was investigated,finding that there were a single-phase region and a two-phase region in ternary phase diagram.The electrical conductivity measurement was employed to investigate the microregion of the single-phase region,and a bicontinuous microregion and a benzene-in-water（O/W） microemulsion microregion were identified,which was confirmed by freeze-fracture transmission electron microscopy（FF-TEM） observations.The sizes of the microemulsion droplets are in the range of 20-50 nm.展开更多
A comparison study was conducted on the performance of the Ag_(2)CO_(3) visible light catalysts synthesized in a surfactant-free microemulsion(SFME),water and water/propan-2-ol mixture,respectively.The XPS spectra sho...A comparison study was conducted on the performance of the Ag_(2)CO_(3) visible light catalysts synthesized in a surfactant-free microemulsion(SFME),water and water/propan-2-ol mixture,respectively.The XPS spectra show that all the synthesized Ag_(2)CO_(3) products have good purity.The SEM,XRD,BET and DRS characterizations indicate that the Ag_(2)CO_(3) product synthesized in the SFME template has higher crys-tallinity,more regular morphology,more uniform size,larger specific surface area,and stronger visible light absorption performance,thus having better catalytic photodegradation activity for rhodamine B(RhB),methylene blue(MB)and methyl orange(MO).When the degradation time reaches 45 min,the degradation rate of RhB is as high as 99.11%.Na_(2)CO_(3) has a good stabilizing effect when its concentration is 0.001 mol L^(-1).This research is of great significance to expand the application of SFMEs in the synthesis of high-efficiency catalytic materials.展开更多
基金supported by the National Natural Science Foundation of China(No.20953003)the Natural Science Foundation of Shandong Province of China(No.Z2008B08 and ZR2009BZ001)Taishan Scholar Foundation of Shandong Province of China(No.ts20070713).
文摘Generally,a microemulsion consists of oil,water,surfactant and sometimes cosurfactant.Herein,we report a novel suffactant-free microemulsion（denoted as SFME） composed of benzene,water and ethanol without the amphiphilic molecular structure of traditional surfactant.The phase behavior of the ternary system was investigated,finding that there were a single-phase region and a two-phase region in ternary phase diagram.The electrical conductivity measurement was employed to investigate the microregion of the single-phase region,and a bicontinuous microregion and a benzene-in-water（O/W） microemulsion microregion were identified,which was confirmed by freeze-fracture transmission electron microscopy（FF-TEM） observations.The sizes of the microemulsion droplets are in the range of 20-50 nm.
基金This work was financially supported by Shandong Provincial Natural Science Foundation,China(No.ZR2020MB038).
文摘A comparison study was conducted on the performance of the Ag_(2)CO_(3) visible light catalysts synthesized in a surfactant-free microemulsion(SFME),water and water/propan-2-ol mixture,respectively.The XPS spectra show that all the synthesized Ag_(2)CO_(3) products have good purity.The SEM,XRD,BET and DRS characterizations indicate that the Ag_(2)CO_(3) product synthesized in the SFME template has higher crys-tallinity,more regular morphology,more uniform size,larger specific surface area,and stronger visible light absorption performance,thus having better catalytic photodegradation activity for rhodamine B(RhB),methylene blue(MB)and methyl orange(MO).When the degradation time reaches 45 min,the degradation rate of RhB is as high as 99.11%.Na_(2)CO_(3) has a good stabilizing effect when its concentration is 0.001 mol L^(-1).This research is of great significance to expand the application of SFMEs in the synthesis of high-efficiency catalytic materials.
