One-component solution system to prepare nanometric anatase TiO2

Trung, Tran; Ha, Chang‐Sik

doi:10.1016/j.msec.2003.09.004

Cited by 24 publications

(20 citation statements)

References 12 publications

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“…As known that bulk defect inside TiO 2 is one of the main parameters controlling crystallinity of TiO 2 [28,40]. The decrease of bulk defect is consistent with the increase in intensity of XRD which reveals that the crystallinity of the TiO 2 -R165 sample was the lowest (XRD) containing the highest amount of the bulk defect (ESR).…”

Section: Thermal Analysissupporting

confidence: 73%

“…Variances of TiO 2 were synthesized by sol-gel technique combined with ultrasonic vibration at room temperature and then calcined at 723 K. The water:alkoxide molar ratio was varied (R = 165, 80, 40,16,4) in order to affect the amounts of organic and inorganic residual left on the TiO 2 gel. The nomenclatures used for representing the resulting TiO 2 have been listed in Table 1.…”

Section: Characteristics Of Crystalline Tiomentioning

confidence: 99%

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Surface defect (Ti3+) controlling in the first step on the anatase TiO2 nanocrystal by using sol–gel technique

Suriye

Jongsomjit

Satayaprasert

et al. 2008

Applied Surface Science

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Section: Thermal Analysissupporting

confidence: 73%

Section: Characteristics Of Crystalline Tiomentioning

confidence: 99%

Surface defect (Ti3+) controlling in the first step on the anatase TiO2 nanocrystal by using sol–gel technique

Suriye

Jongsomjit

Satayaprasert

et al. 2008

Applied Surface Science

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“…Titanium dioxide has been receiving substantial attention in the recent years due to its wide range of commercial applications, such as a photocatalysts, in white pigments, in gas sensors, in hygienic and medical instruments, in ceramics, and in vehicles external surfaces [1][2][3][4][5][6]. The applications of TiO 2 strongly depend on the high homogeneity and definite phase composition, particle size, high surface area and porosity.…”

Section: Introductionmentioning

confidence: 99%

Dependence of activation energy and lattice strain on TiO₂nanoparticles?

Moghaddam

Nasirian

2012

Nanoscience Methods

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Titanium dioxide nanopowders were synthesised by the sol-gel method using TiCl 4 as a precursor under argon gas atmosphere. Effect of alteration of lattice strain with a change of synthesis parameters on the size of nanocrystallites and activation energy of phase transformation from anatase to rutile was investigated. Activation energy is the minimum energy required for overcoming the energy barrier for phase transformation between the two phases. The growth of nanocrystallite and a decrease in the positive lattice strain occurred when the calcinations increased from 300 • C to 550 • C. After the calcination increased at 600 • C, the sign of the lattice strain was altered from positive to negative, the growth of crystallite continued and phase transformation occurred. In spite of the fact that the anstase crystallites grew with the increase of the gelatinisation time, the activation energy decreased. In addition, the rapid decrease of the lattice strain in the as-prepared sample in lower mixing time causes an increase of the activation energy, and the mass fraction of the rutile phase occurred. IntroductionTitanium dioxide has been receiving substantial attention in the recent years due to its wide range of commercial applications, such as a photocatalysts, in white pigments, in gas sensors, in hygienic and medical instruments, in ceramics, and in vehicles external surfaces [1][2][3][4][5][6]. The applications of TiO 2 strongly depend on the high homogeneity and definite phase composition, particle size, high surface area and porosity. Moreover, in the evaluation of thermal stability and mechanical properties of nanocrystalline TiO 2 , grain size, surface free energy, activation energy of phase transformation and initial strain are very important factors [6][7][8][9][10][11][12][13][14][15][16].Titania naturally occurs in three polymorphs: anatase, rutile and brookite. Both anatase and brookite are metastable phases and rutile is a stable one [6,[17][18][19][20][21][22]. Each phase exhibits different physical and chemical properties, which are determined by their structures. Moreover, the theoretical study and experimental results have shown that the photocatalytic and photovoltaic properties of TiO 2 nanoparticles with two mixed polymorphic phases (anatase and rutile) are better than pure anatase TiO 2 nanoparticles [21][22][23]. One of the methods used to produce titania

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“…(1). Among the various metal oxides, Titanium dioxide (TiO 2 ) is believed to be one of the most attractive materials due to its nontoxicity, long-term stability and low cost (2).…”

Section: Introductionmentioning

confidence: 99%

Formation of anatase TiO2 nanospheres by simple polymer gel technique

Prakash¹,

Navaneethan²,

Ponnusamy³

et al. 2012

AIP Conference Proceedings

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Pure anatase nano-TiO 2 powders were successfully prepared by a simple polymer gel technique using poly-(vinylpyrrolidone) (PVP) as the polymer. The prepared TiO 2 samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV-visible spectroscopy studies. The particle size analyzed by TEM ranged between 2 nm and 5 nm. The maximum UV absorption for the TiO 2 nanoparticles was below 400 nm.

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One-component solution system to prepare nanometric anatase TiO2

Cited by 24 publications

References 12 publications

Surface defect (Ti3+) controlling in the first step on the anatase TiO2 nanocrystal by using sol–gel technique

Surface defect (Ti3+) controlling in the first step on the anatase TiO2 nanocrystal by using sol–gel technique

Dependence of activation energy and lattice strain on TiO₂nanoparticles?

Formation of anatase TiO2 nanospheres by simple polymer gel technique

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One-component solution system to prepare nanometric anatase TiO2

Cited by 24 publications

References 12 publications

Surface defect (Ti3+) controlling in the first step on the anatase TiO2 nanocrystal by using sol–gel technique

Surface defect (Ti3+) controlling in the first step on the anatase TiO2 nanocrystal by using sol–gel technique

Dependence of activation energy and lattice strain on TiO2nanoparticles?

Formation of anatase TiO2 nanospheres by simple polymer gel technique

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Product

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Dependence of activation energy and lattice strain on TiO₂nanoparticles?