Novel nano-structured materials: synthesis and application

Tuấn, Vũ Anh; Cuong, Tran Manh; Phuong, Dang Tuyet; Hoa, Tran Thi Kim; Linh, Bui Thi Hai; Tuyen, Nguyen Duc; Tuấn, Nguyễn Quốc

doi:10.1504/ijnt.2011.038203

IJNT

2011

DOI: 10.1504/ijnt.2011.038203

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Novel nano-structured materials: synthesis and application

Vũ Anh Tuấn

Tran Manh Cuong

Dang Tuyet Phuong

et al.

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2013

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Cited by 2 publications

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“…In the recent years, the preparation of highly ordered titania nanotube arrays, by virtue of its ordered uniform morphology, orientated growth, adjustable size of array structure, a large specific surface area, strong adsorption ability and simple preparation, becomes a researchful hot spot in the field of functional material. There have be three wildly used methods to prepare TiO 2 nanotube at the present time: hydrothermal method [1] , template method [2] and anodic oxidation method [3] . Kasuga, a Japanese scholar, successfully prepared TiO 2 nanotube for the first time by hydrothermal method in 1998.…”

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Influence of Parameters on Fabricating TiO<sub>2</sub> Nanotube by a Hydrothermal Method

Zheng

Zhang

Zeng

2013

KEM

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TiO2 nanotube was synthesized successfully with different parameters via hydrothermal process, using nanopowder TiO2 and concentrated NaOH solution as raw materials. If the hydrothermal temperature, hydrothermal time or washing conditions were changed, the structure of the nanotube was different. The phase compositions and morpholog ies of the TiO2 nanotube was characterized by XRD and SEM. These results suggested that the length of the nanotube increased from 180 nm to 270 nm, and the diameter almost kept a fixed level about 15~20 nm within a range of 110°C~150°C. The length of the nanotube increased from 230 nm to 330 nm and diameter was nearly unchanged as the result of time increasing from 24 h to 48 h. Washing conditions were very important to influence the nanotube. When the deposit was washed directly with distilled water, short and thick nanorod were formated, and microrod generated with concentrated hydrochloric acid, and microrod structure with smooth surface was produced with absolute ethyl alcohol, and the nanotube was fabricated only after washing by dilute acid.

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Influence of Parameters on Fabricating TiO<sub>2</sub> Nanotube by a Hydrothermal Method

Zheng

Zhang

Zeng

2013

KEM

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Nanoscale effect on thermal decomposition kinetics of organic particles: dynamic vacuum stability test of 1,3,5-triamino-2,4,6-trinitrobenzene

Liu

Zhang

et al. 2013

Phys. Chem. Chem. Phys.

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Despite the extensive research that has been carried out on organic nanoparticles, little explanation has been provided for the reasons behind their exceptional properties. In this work, the effect of the particles being on the nanoscale on the thermal decomposition kinetics of organic particles was examined by means of a dynamic vacuum stability test. Nano- and microscale particles of 1,3,5-triamino-2,4,6-trinitrobenzene were measured for comparison. Analysis of the evolved gas revealed that the nanoparticles (NPs) show much higher reaction activity than the microparticles (MPs). Both the non-isothermal and isothermal reaction mechanisms and kinetics were computed. The NPs and MPs exhibit different reaction mechanisms, while similarly sized particles follow different mechanisms for different stages of the reaction. The mechanisms for the NPs are affected by the temperature in the range considered. NPs have larger values for the apparent activation energy (E(a)) and pre-exponential factor (A) than MPs and the relationship of E(a) to A demonstrates that a kinetic compensation effect is evident. The nanoscale effect shows there to be a significant influence on the apparent performances and kinetics as well as on the intrinsic reaction mechanisms of organic particles. This effect can be attributed to the surface properties of NPs, where the high surface area contributes to efficient mass transfer and heat transfer, thus leading to numerous activated molecules being involved in the reaction.

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Novel nano-structured materials: synthesis and application

Cited by 2 publications

References 5 publications

Influence of Parameters on Fabricating TiO<sub>2</sub> Nanotube by a Hydrothermal Method

Influence of Parameters on Fabricating TiO<sub>2</sub> Nanotube by a Hydrothermal Method

Nanoscale effect on thermal decomposition kinetics of organic particles: dynamic vacuum stability test of 1,3,5-triamino-2,4,6-trinitrobenzene

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