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Vietnamese
Official thesis title: Study on syntheses, characteristics and applications of nano-sized Cu2O
1. Full name: Nguyen Thi Lua
2. Sex: female
3. Date of birth: 27/2/1984
4. Place of birth: Nam Dinh
5. Admission decision number: 3614/SĐH Dated: October 22th 2009 by the President of Vietnam National University, Hanoi
6. Changes in academic process: None
7. Official thesis title: Study on syntheses, characteristics and applications of nano-sized Cu2O
8. Major: Inorganic chemistry
9. Code: 62.44.25.01
10. Supervisors:
Assoc.Prof. Dr Trieu Thi Nguyet
11. Summary of the new findings of the thesis
- The effects of the reaction conditions on the formation of nano-sized Cu2O powder were systematic investigated: the nature and the amount of stabilizer, the amount of reducing agent, KOH concentration and the reaction temperature. Since then, the optimum reaction conditions are advanced.
- The effects of the reaction condition on the catalytical ability of Cu2O nanoparticles in polymerization reaction acetylene gas to synthesize CNF were systematic investigated: the reaction time, the reaction temperature, the acetylene flow rate. Since then, the optimum reaction conditions are advanced.
- Cu2O thin films on glass substrate were successfully fabricated by CVD method using Cu(acac)2 precursor and different reacting agents: ethanol-water vapor, water vapor and water-hydrogen peroxide vapor from simple equipments, conformity with condition of laboratory in Viet Nam: temperature range of 240-3000C, pressure about 160 mmHg. In there, ethanol-water and water-hydrogen peoxide reacting agents are not mentioned by any authors. The obtained thin films was uniform, had good quality and absorbed strongly wavelengths in range 300-600 nm (visible region). Band gap of Cu2O thin films were collected from UV-Vis and PL methods (Eg= 2.2-2.6 eV).
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