Synthesis of Silver Chloride and Sodium Niobate based Nanomaterials
- 주제(키워드) silver chloride , sodium niobate , nanomaterial
- 발행기관 고려대학교 대학원
- 지도교수 김웅
- 발행년도 2011
- 학위수여년월 2011. 2
- 학위구분 석사
- 학과 일반대학원 신소재공학과
- 원문페이지 59 p
- 실제URI http://www.dcollection.net/handler/korea/000000025943
- 본문언어 영어
- 제출원본 000045640948
초록/요약
We demonstrate a facile route to synthesize silver chloride nanocubes and derivative nanomaterials. For the synthesis of silver chloride nanocubes, silver nitrate and hydrochloric acid were used as precursors in ethylene glycol, and poly(vinyl pyrrolidone) as a surfactant. Molar ratio of the two precursors greatly influenced the morphology and composition of the final products. As-synthesized silver chloride nanocubes showed size-dependent optical properties in the visible region of light, which is likely due to a small amount of silver clusters formed on the surface of silver chloride nanocubes. Moreover, we show that simple reduction of silver chloride nanocubes with different reducing reagents lead to the formation of delicate nanostructures such as cube-shaped silver-nanoparticle aggregates, and silver chloride nanocubes with truncated corners and with silver-nanograin decorated corners. Additionally, we investigated the evolution of silver chloride nanocubes to silver chloride nanocubes decorated with silver nanoparticles upon exposure to e-beam. Our facile synthesis of silver chloride related nanoparticles with delicately controlled morphologies could be an important basis for fabricating efficient photocatalysts and antibacterial materials.
more목차
Part 1 Facile Synthesis of Silver Chloride Nanocubes and Their Derivatives
1 Introduction
2 Theoretical Background
2.1 Definition of polyol process
2.2 Capping agent
2.3 Conventional method
3 Experimental
3.1 Raw Materials
3.2 Synthesis of AgCl NPs
3.3 Separation process
3.4 Reducing process
4 Results and Discussion
4.1 Various concentrations between silver and chloride
4.2 Different size of AgCl NPs
4.3 Reduced Ag NPs on AgCl NPs
5 Conclusion
References
Part 2 Growth aspects of NaNbO3 by varying the sodium concentration during hydrothermal synthesis
6 Introduction
7 Theoretical Background
7.1 Hydrothermal synthesis
8 Experimental
8.1 Raw Materials
8.2 Synthesis of NaNbO3 particles
9 Results and Discussion
9.1 Synthesis of NaNbO3 particles at different concentration of NaOH
9.2 Synthesis of NaNbO3 particles at different reaction time
9.3 Heat treatment
10 Conclusion
References
Acknowledgement
