CaMg(CO3)2microspheres were prepared and used as hard templates to fabricate a series of CaMg(CO3)2@Ag2CO3composite microspheres via a fast and low‐cost ion exchange process.The effects of ion exchange time and tempe...CaMg(CO3)2microspheres were prepared and used as hard templates to fabricate a series of CaMg(CO3)2@Ag2CO3composite microspheres via a fast and low‐cost ion exchange process.The effects of ion exchange time and temperature on the physicochemical properties and photocatalytic activities of the composite microspheres were studied through photocatalytic degradation of Acid Orange II under xenon lamp irradiation.The obtained samples were analyzed by X‐ray diffraction,scanning electron microscopy,Fourier transform infrared spectroscopy,UV‐vis diffuse reflectance spectroscopy,N2physical adsorption,and photocurrent tests.The CaMg(CO3)2@Ag2CO3sample with the highest activity was obtained with an ion exchange time of4h and temperature of40°C.The degradation rate of Acid Orange II by this sample reached83.3%after15min of light irradiation,and the sample also performed well in phenol degradation.The CaMg(CO3)2@Ag2CO3produced under these ion exchange conditions showed a well‐ordered hierarchical morphology with small particle sizes,which was beneficial to light absorption and the transfer of photoelectrons(e-)and holes(h+)to the catalyst surface.Moreover,the separation of photogenerated carriers over the composites was greatly improved relative to bare CaMg(CO3)2.Despite the very low content of Ag2CO3(2.56%),excellent photocatalytic performance was obtained over the CaMg(CO3)2@Ag2CO3microspheres.展开更多
The realization of paperless trading in apparel industry by application of EDI has become the requirement of the new century. In this paper the necessity for EDI standardization is proved, and the coding of domestic a...The realization of paperless trading in apparel industry by application of EDI has become the requirement of the new century. In this paper the necessity for EDI standardization is proved, and the coding of domestic apparel EDI message standard is put forward.展开更多
Triacylglycerols are the main constituents of natural fats and oils and contribute directly to their texture and flavor. The DSC （differential scanning calorimetry） of fats and oils is usually performed in order to ...Triacylglycerols are the main constituents of natural fats and oils and contribute directly to their texture and flavor. The DSC （differential scanning calorimetry） of fats and oils is usually performed in order to characterize their melting and crystallization characteristics. The effect of the chemically catalyzed interesterification of two vegetable oils, i.e. palm stearin and linseed oil, on the thermal behavior of the product is studied. The objective of this study is to analyze the impact of the transesterification reaction conditions and of the initial amounts of oils on the thermal behavior of the product. This work shows that both cooling and heating DSC thermograms undergo significant changes as the result of the mixture of linseed oil and palm stearin and of their transesterification.展开更多
基金supported by the National Natural Science Foundation of China(21567008,21607064,21707055,21763011)Program of Qingjiang Excellent Young Talents,Jiangxi University of Science and Technology+2 种基金Program of 5511 Talents in Scientific Technological Innovation of Jiangxi Province(20165BCB18014)Academic and Technical Leaders of the Main Disciplines in Jiangxi Province(20172BCB22018)Jiangxi Province Natural Science Foundation China(20161BAB203090,20161BAB213083,20171ACB21041)~~
文摘CaMg(CO3)2microspheres were prepared and used as hard templates to fabricate a series of CaMg(CO3)2@Ag2CO3composite microspheres via a fast and low‐cost ion exchange process.The effects of ion exchange time and temperature on the physicochemical properties and photocatalytic activities of the composite microspheres were studied through photocatalytic degradation of Acid Orange II under xenon lamp irradiation.The obtained samples were analyzed by X‐ray diffraction,scanning electron microscopy,Fourier transform infrared spectroscopy,UV‐vis diffuse reflectance spectroscopy,N2physical adsorption,and photocurrent tests.The CaMg(CO3)2@Ag2CO3sample with the highest activity was obtained with an ion exchange time of4h and temperature of40°C.The degradation rate of Acid Orange II by this sample reached83.3%after15min of light irradiation,and the sample also performed well in phenol degradation.The CaMg(CO3)2@Ag2CO3produced under these ion exchange conditions showed a well‐ordered hierarchical morphology with small particle sizes,which was beneficial to light absorption and the transfer of photoelectrons(e-)and holes(h+)to the catalyst surface.Moreover,the separation of photogenerated carriers over the composites was greatly improved relative to bare CaMg(CO3)2.Despite the very low content of Ag2CO3(2.56%),excellent photocatalytic performance was obtained over the CaMg(CO3)2@Ag2CO3microspheres.
文摘The realization of paperless trading in apparel industry by application of EDI has become the requirement of the new century. In this paper the necessity for EDI standardization is proved, and the coding of domestic apparel EDI message standard is put forward.
文摘Triacylglycerols are the main constituents of natural fats and oils and contribute directly to their texture and flavor. The DSC （differential scanning calorimetry） of fats and oils is usually performed in order to characterize their melting and crystallization characteristics. The effect of the chemically catalyzed interesterification of two vegetable oils, i.e. palm stearin and linseed oil, on the thermal behavior of the product is studied. The objective of this study is to analyze the impact of the transesterification reaction conditions and of the initial amounts of oils on the thermal behavior of the product. This work shows that both cooling and heating DSC thermograms undergo significant changes as the result of the mixture of linseed oil and palm stearin and of their transesterification.
