The effect of rate of hydrolysis on structural and optical properties of the TiO2 nanoparticles prepared by a sol–gel method

Dejene, F.B.; Onani, Martin O.; Tarus, Paul K.

doi:10.1016/j.physb.2015.08.030

Cited by 9 publications

(5 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The observed peak at 490 nm corresponds to the direct recombination between electrons in the conduction band and holes in the valence band of the semiconductor. The peak at 620 nm is due to the oxygen vacancy with two trapped electrons that is called F centers (Dejene et al 2016).…”

Section: Photoluminescence Analysismentioning

confidence: 99%

Transition metals (Mn, Ni, Co) doping in TiO2 nanoparticles and their effect on degradation of diethyl phthalate

Kaur

Singla

Singh

2017

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Transition metal-doped TiO 2 nanoparticles are synthesized by sol-gel method. The as-prepared samples are characterized by various techniques to correlate structural and optical properties with chemical nature of dopants and their effect on photocatalytic degradation of diethyl phthalate esters. X-ray diffraction (XRD) reveals that all the samples are crystalline and exhibit anatase as a major phase. Chemical nature of dopants could not affect the formation of anatase and its volume fraction. The crystallite size of undoped and doped TiO 2 nanoparticles varies between 10 and 12 nm as confirmed by XRD and transmission electron microscope. The lowest optical band gap observed is 2.47 eV in Mn-doped TiO 2 . Among all the samples, Ni-doped TiO 2 sample shows better photocatalytic activity and degradation of diethyl phthalate due to its lower crystallite size and higher surface area than those of Mn-and Co-doped TiO 2 samples.

show abstract

Section: Photoluminescence Analysismentioning

confidence: 99%

Transition metals (Mn, Ni, Co) doping in TiO2 nanoparticles and their effect on degradation of diethyl phthalate

Kaur

Singla

Singh

2017

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The morphology of that powder prepared with 2 mL of water contained very fine anatase crystals and quasi-spherical nanoparticles. Upon increasing the amount of water to 5 and 10 mL, spherical and homogeneous structures were obtained in response to the increase in hydrolysis rate, which proves that increasing the amount of water facilitates particle formation [163]. TiO 2 nanoparticles were also produced by the sol-gel method using 0.5 g of titanium tetrabutoxide, 50 mL of diethylene [56] nanostructures can also be influenced by the ratio between quantities of reactants, notably the ratio of ceramic precursor to water.…”

Section: Forms Of Synthesis Used In the Production Of Biomaterialsmentioning

confidence: 82%

“…At temperatures above 600 ºC, larger particles and development of the rutile phase were observed [56]. Peaks of the rutile phase observed after heating at 700 ºC were attributed to anatase to rutile phase transition [157,162,163]. The morphology of that powder prepared with 2 mL of water contained very fine anatase crystals and quasi-spherical nanoparticles.…”

Section: Forms Of Synthesis Used In the Production Of Biomaterialsmentioning

confidence: 99%

“…TiO 2 nanoparticles were also produced by the sol-gel method using 0.5 g of titanium tetrabutoxide, 50 mL of diethylene [56] nanostructures can also be influenced by the ratio between quantities of reactants, notably the ratio of ceramic precursor to water. Nanocrystalline titanium dioxide powders were synthesized by the sol-gel method, varying the rate of hydrolysis [163]. The nanoparticles were synthesized by hydrolysis using as precursor 20 mL of titanium isopropoxide mixed with 100 mL of ethanol and different amounts of water to control the hydrolysis rate.…”

Section: Forms Of Synthesis Used In the Production Of Biomaterialsmentioning

confidence: 99%

See 1 more Smart Citation

Nanostructured titanium dioxide for use in bone implants: a short review

et al. 2020

View full text Add to dashboard Cite

Titanium dioxide (TiO2) based nanostructured materials have shown great potential for use in implants thanks to their excellent physicochemical properties, such as high specific surface area, ability to elicit positive cell response, and stability in body fluids. However, there are few studies in the literature that focus on the use of nanostructured TiO2 to support cell growth and bone regeneration. The purpose of this survey is to review the state of the art of TiO2 for use in bone implants, as well as provide insight into its characteristics and synthesis methods. Studies of the biological properties of nanostructured TiO2 are described, establishing its potential for the biomedical field.

show abstract

“…Nano-sized materials are in existence as crystal or powder forms with a dimension less than 100 nm and a high surface-to volume ratio [1]. Besides, nano-sized materials are significant for biomedical, communication, energy, electronic applications because of their good electrical, optical and magnetic properties that are different from their bulk counterparts [2]. Among them, nano-sized TiO2 powder is one of the most significant particulate material using for various objectives, because of its great features of a high refractive index leading to a high keeping power and whiteness, nontoxicity, high oxidizing capability, chemical stability, relatively low production cost and easy availability in the market [3,4].…”

Section: Introductionmentioning

confidence: 99%

Application of Taguchi Method for The Synthesis of Nano-sized TiO2 Powders by Acid-Used Sol-Gel Method

Celep

Dinçer

2017

ANADOLU UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY a - Applied Sciences and Engineering

View full text Add to dashboard Cite

The acid-used sol-gel synthesis of nano-sized titania (TiO2) powders has been studied systematically to optimize the processing parameters by Taguchi method that control crystallite size. In addition, crystallite and particle size of TiO2 powders were examined by X-ray diffraction (XRD) and transmission electron microscopy (TEM). For this purpose, the amount of acid, reaction temperature and reaction time were determined as control parameters. In order to achieve these objectives, Taguchi's L9 orthogonal design (3 parameter, 3 level) was used for the experiential design. In order to determine the optimal synthesis conditions for nanosized TiO2 powders, the signal-to-noise (S/N) ratio was used, which was calculated from crystallite size of the nano-sized TiO2 powders using "the-smaller-the-better" appoachment. Besides, analysis of variance (ANOVA) was utilised to accomplish the statistical importance of the synthesis parameters. Experiments were fulfilled to verify the model at the chosen conditions and the particle size was determined according to XRD analysis as 46.98 nm. Moreover, the actual size of the synthesised nano-sized TiO2 powders with the average size was 51.41 nm. Therefore, the Taguchi optimization method was a main tool in the optimization of the nanosized TiO2 powders synthesis process with less experiential tests and slightly cost-efficient approachment.

show abstract

The effect of rate of hydrolysis on structural and optical properties of the TiO2 nanoparticles prepared by a sol–gel method

Cited by 9 publications

References 36 publications

Transition metals (Mn, Ni, Co) doping in TiO2 nanoparticles and their effect on degradation of diethyl phthalate

Transition metals (Mn, Ni, Co) doping in TiO2 nanoparticles and their effect on degradation of diethyl phthalate

Nanostructured titanium dioxide for use in bone implants: a short review

Application of Taguchi Method for The Synthesis of Nano-sized TiO2 Powders by Acid-Used Sol-Gel Method

Contact Info

Product

Resources

About