A novel complex nano-structured Au@TiO2 gold catalyst has been prepared. Au precursor could be transformed into Au@TiO2/MCM-22 with the complex nano-structured using two different methods. Samples were characterized b...A novel complex nano-structured Au@TiO2 gold catalyst has been prepared. Au precursor could be transformed into Au@TiO2/MCM-22 with the complex nano-structured using two different methods. Samples were characterized by XRD, FT-IR, UV-vis, TEM, ICP-AES and N2 adsorption-desorption. It is found that gold was anchored on the TiO2/MCM-22 as small size and uniform particles with the average diameters in the range of 5 - 9 nm. Catalytic results show that such nano-gold catalysts display excellent catalytic performance for cyclohexane oxidation. Au@TiO2/MCM-22 catalyst with the gold content of 0.5 wt% exhibits extremely exceptionally catalytic activity (12.81%) and high turnover frequency (52,121 h-1), which may be ascribed to the synergistic effects of Au and TiO2 in the complex nano-structured catalyst Au@TiO2/ MCM-22. Because of the strong metal support interaction, aggregation of active sites (Au nanoparticles) during the oxidation reaction is effectively prohibited and the catalytic activity is essentially retained.展开更多
Yinqiao powder comes from the book"Wenbing Tiaobian"(Detailed Analysis of Epidemic Warm Diseases)written by Wu Jutong in the Qing Dynasty(1636-1912),in which it is mentioned that"pungent-cool diaphoreti...Yinqiao powder comes from the book"Wenbing Tiaobian"(Detailed Analysis of Epidemic Warm Diseases)written by Wu Jutong in the Qing Dynasty(1636-1912),in which it is mentioned that"pungent-cool diaphoretic agent Yinqiao power is used to treat patients with fever,not aversion to cold but thirsty"Yinqiao powder is often used to treat Wind-warm syndrome,warm-heat syndrome and miscellaneous diseases caused by some pathogenic factors in Wei-fen syndrome(Wei-fen syndrome is the syndrome name of the disease and is often used to indicate the initial stage of exogenous febrile disease,which is the syndrome of the body's guard surface.)and upper energizer.With the further research and application of Yinqiao powder,it is more and more widely used in clinic.This article summarizes the clinical application of Yinqiao powder through the analysis of the prescription meaning,compatible prescriptions,decoction methods and other aspects of Yinqiao powder in order to provide more evidence for clinical treatment of febrile disease.At the same time,through the prescription thinking of Yinqiao powder,we can learn Wu Jutong's treatment principle and academic thought of"Shangjiao(Shangjiao is one of the three and is the upper part of the Sanjiao.Generally refers to the chest above the diaphragm,including the heart,lungs and throat.)is like a feather,not lightly".Wu Jutong's flexible use of Chinese medicine and the thought of syndrome differentiation and treatment are also worthy of our study and reference.展开更多
文摘A novel complex nano-structured Au@TiO2 gold catalyst has been prepared. Au precursor could be transformed into Au@TiO2/MCM-22 with the complex nano-structured using two different methods. Samples were characterized by XRD, FT-IR, UV-vis, TEM, ICP-AES and N2 adsorption-desorption. It is found that gold was anchored on the TiO2/MCM-22 as small size and uniform particles with the average diameters in the range of 5 - 9 nm. Catalytic results show that such nano-gold catalysts display excellent catalytic performance for cyclohexane oxidation. Au@TiO2/MCM-22 catalyst with the gold content of 0.5 wt% exhibits extremely exceptionally catalytic activity (12.81%) and high turnover frequency (52,121 h-1), which may be ascribed to the synergistic effects of Au and TiO2 in the complex nano-structured catalyst Au@TiO2/ MCM-22. Because of the strong metal support interaction, aggregation of active sites (Au nanoparticles) during the oxidation reaction is effectively prohibited and the catalytic activity is essentially retained.
文摘Yinqiao powder comes from the book"Wenbing Tiaobian"(Detailed Analysis of Epidemic Warm Diseases)written by Wu Jutong in the Qing Dynasty(1636-1912),in which it is mentioned that"pungent-cool diaphoretic agent Yinqiao power is used to treat patients with fever,not aversion to cold but thirsty"Yinqiao powder is often used to treat Wind-warm syndrome,warm-heat syndrome and miscellaneous diseases caused by some pathogenic factors in Wei-fen syndrome(Wei-fen syndrome is the syndrome name of the disease and is often used to indicate the initial stage of exogenous febrile disease,which is the syndrome of the body's guard surface.)and upper energizer.With the further research and application of Yinqiao powder,it is more and more widely used in clinic.This article summarizes the clinical application of Yinqiao powder through the analysis of the prescription meaning,compatible prescriptions,decoction methods and other aspects of Yinqiao powder in order to provide more evidence for clinical treatment of febrile disease.At the same time,through the prescription thinking of Yinqiao powder,we can learn Wu Jutong's treatment principle and academic thought of"Shangjiao(Shangjiao is one of the three and is the upper part of the Sanjiao.Generally refers to the chest above the diaphragm,including the heart,lungs and throat.)is like a feather,not lightly".Wu Jutong's flexible use of Chinese medicine and the thought of syndrome differentiation and treatment are also worthy of our study and reference.
