Search

Your search keyword '"Xiudan Zhao"' showing total 5 results
Start Over Author "Xiudan Zhao"
5 results on '"Xiudan Zhao"'

2. Preparation of Keggin-type monosubstituted polyoxometalate ionic liquid catalysts and their application in catalyzing the coupling reaction of ethylene carbonate and dimethyl succinate to synthesize poly(ethylene succinate)

Author

Xiudan Zhao, Liying Guo, Tiejun Xu, Rongrong Zheng, and Haiyue Wang

Subjects
Materials Chemistry, General Chemistry, Catalysis
Abstract

A new low-carbon and environmentally friendly process method for the catalytic synthesis of biodegradable polyesters catalyzed by using ionic liquid catalysts.

Published
2022

3. Preparation of biacidic tin-based ionic liquid catalysts and their application in catalyzing coupling reaction between ethylene carbonate and dimethyl succinate to synthesize poly(ethylene succinate)

Author

Xiudan Zhao, Liying Guo, Tiejun Xu, Haiyue Wang, Rongrong Zheng, and Zezhong Jiang

Subjects
Materials Chemistry, General Chemistry, Catalysis
Abstract

A new low-carbon and environmentally friendly process method for the catalytic synthesis of biodegradable polyester by utilizing ionic liquid catalysts.

Published
2022

4. Preparation of Titanium-based Polyoxometalatxiue-ionic Liquid Catalyste and Application in the Synthesie of Degradable Polyester.

Author

Ran CHEN, Changyuan YU, Liying GUO, Kun LIU, Xiudan ZHAO, and Zezhong JIANG

Subjects
IR spectrometers, CATALYSIS, POLYESTERS, CHEMICAL structure, LIQUIDS
Abstract

Three kinds of Keggin-type titanium-based polyoxometalate-ionic liquid catalysts were prepared, and the chemical structure, crystal structure and thermal stability of the three catalysts were analyzed and tested by infrared spectrometer, ultraviolet-visible spectrometer, X-ray diffractometer, and thermogravimetric analyzer, respectively. Afterwards, their performance in catalyzing the coupling reaction of ethylene carbonate (EC) and dimethyl succinate (DMSu) to synthesize polyethylene succinate (PES) was studied, and the effects of different metals on the catalytic performance and the mechanism of action were discussed. The optimal process parameters for the coupling reaction were explored. Finally, the chemical structure of PES was characterized by infrared spectrometer. The results show that under the same process parameters, the polyoxometalate-ionic liquid catalyst Bmims [Ti(H2O)TiMo11039] had the best catalytic effect. Under the optimal process parameters, Bmims [Ti(H2O)TiMo11 O39] had obvious inhibitory effect on side reactions, and the yield and selectivity of PES prepolymer were up to 72. 23% and 88. 64%. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

5. Study of potential of Fe-Si76 as catalyst for CO2 reduction to CH3OH

Author

Jingjing Lu, Tiejun Xu, Xiudan Zhao, and Haitao Liu

Subjects
inorganic chemicals, Materials science, Silicon, Reaction step, Kinetics, chemistry.chemical_element, Condensed Matter Physics, Redox, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Catalysis, chemistry.chemical_compound, chemistry, Chemical engineering, Carbon dioxide, Materials Chemistry, Methanol, Physical and Theoretical Chemistry, Selectivity, Spectroscopy
Abstract

In this study, mechanisms of reduction reaction of carbon dioxide on Iron doped silicon nanocage are investigated in gas phase and water. The metal catalysts have several fundamental problems such as slow kinetics, high over potential, low performance and insignificant selectivity. The reaction pathways of carbon dioxide conversion to methanol are examined by theoretical methods in gas phase and water. The acceptable reaction pathway is identified from thermodynamic view point in gas phase ad water. Results indicated that the in carbon dioxide conversion to methanol the reaction step of 4 is the rate-limiting step. Results indicated that the over potential (−0.825 V) of reaction steps in gas phase and water is lower than metal catalysts (−1.116 V). The Iron doped silicon nanocage with low barrier energies and low over potential is proposed as efficient catalyst in gas phase and water.

Published
2021

Catalog

Books, media, physical & digital resources
See catalog results