Combustion synthesis of titania nanoparticles in a premixed methane flame

Ma, Hwong‐Wen; Yang, Han‐Chung

doi:10.1016/j.jallcom.2010.05.066

Cited by 10 publications

(19 citation statements)

References 27 publications

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“…A correlation of the crystal phase with residence time, flame temperature and TTIP concentration was observed. Similar results were reported by Ma and Yang [18,19].…”

supporting

confidence: 91%

A kinetic mechanism for the thermal decomposition of titanium tetraisopropoxide

Buerger

Nurkowski

Akroyd

et al. 2017

Proceedings of the Combustion Institute

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This work presents the first systematically derived and thermodynamically consistent mechanism to describe the thermal decomposition of titanium tetraisopropoxide (TTIP). The mechanism is based on an analogy between the decomposition of the isopropoxide branches and the decomposition of isopropanol. Flux and sensitivity analyses were used to identify the main reaction pathways in the proposed mechanism as the step-wise release of C 3 H 6 via four-member ring transition states, the successive abstraction of CH 3 radicals via C−C bond cleavage followed by hydrogen abstraction to form C − − C double bonds, and hydrogen abstraction from the isopropoxide methyl groups followed by the release of C 3 H 6 . The final decomposition product was

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“…A correlation of the crystal phase with residence time, flame temperature and TTIP concentration was observed. Similar results were reported by Ma and Yang [18,19].…”

supporting

confidence: 91%

A kinetic mechanism for the thermal decomposition of titanium tetraisopropoxide

Buerger

Nurkowski

Akroyd

et al. 2017

Proceedings of the Combustion Institute

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“…Chin [14] suggested that the primary particle diameter obtained under optimal conditions was considerably smaller than that of commercial photocatalysts (Degussa, P25) and that the specific surface area of oxygen deficient TiO x particles was (SSA) 134.4 m 2 /g. In our previous study [15], the anatase content of TiO 2 particles increased with an increase in oxygen concentration at flame temperatures between 1138 and 1290 K. Furthermore, at a TTIP concentration of 0.26%, high-purity anatase TiO 2 nanoparticles with a diameter of 20 nm were synthesized in CH 4 /O 2 /N 2 flames; however, SSA values of 124.39 m 2 /g were obtained.…”

Section: Introductionmentioning

confidence: 79%

“…Furthermore, axial co-flow burners with a total flow area of 508.5 mm 2 were placed around the circumference of the burner. Details on the experimental setup of the Bunsen burner have been described in the literature [15]. Fig.…”

Section: Methodsmentioning

confidence: 99%

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A comparative study of TiO2 nanoparticles synthesized in premixed and diffusion flames

Yang

2010

J. Therm. Sci.

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Previous studies have been shown that synthesis of titania (TiO 2 ) crystalline phase purity could be effectively controlled by the oxygen concentration through titanium tetra-isopropoxide (TTIP) via premixed flame from a Bunsen burner. In this study, a modified Hencken burner was used to synthesize smaller TiO 2 nanoparticles via short diffusion flames. The frequency of collisions among particles would decrease and reduce TiO 2 nanoparticle size in a short diffusion flame height. The crystalline structure of the synthesized nanoparticles was characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), Barrett-Joyner-Halenda (BJH) and Brunauer-Emmett-Teller (BET) measurements. The characteristic properties of TiO 2 nanoparticles synthesized from a modified Hencken burner were compared with the results from a Bunsen burner and commercial TiO 2 (Degussa P25). The results showed that the average particle size of 6.63 nm from BET method was produced by a modified Hencken burner which was smaller than the TiO 2 in a Bunsen burner and commercial TiO 2 . Moreover, the rutile content of TiO 2 nanoparticles increased as the particle collecting height increased. Also, the size of TiO 2 nanoparticles was highly dependent on the TTIP loading and the collecting height in the flame.

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“…The nanosized TiO 2 has continued to attract interests in both industry and academia due to unique properties [1] that has lead to its applications as photocatalysis [2,3], solar energy converters [4], interface in biomaterials [5], and sensors [6]. The construction industries also use nanostructured TiO 2 in composite with cement.…”

Section: Introductionmentioning

confidence: 99%

A facile hydrothermal approach for construction of carbon coating on TiO2 nanoparticles

Olurode

Neelgund

Oki

et al. 2012

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Herein a facile hydrothermal approach is used to construct carbon coated TiO2 nanoparticles employing dextrose as the source of carbon. The procedure is operated at a low temperature of 200 °C. Fourier infrared spectroscopy demonstrated the successful coating of carbon on TiO2 nanoparticles. The phase composition of TiO2 and carbon coated TiO2 nanoparticles were studied using X-ray diffraction and the surface morphology was analyzed by scanning and transmission electron microscopy. The existence of carbon coating on TiO2 nanoparticles was revealed by thermogravimetric analysis through different thermograms exhibited for TiO2 and carbon coated TiO2 nanoparticles. The reported method offers a simple and efficient approach for production of carbon coating TiO2 nanoparticles.

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Combustion synthesis of titania nanoparticles in a premixed methane flame

Cited by 10 publications

References 27 publications

A kinetic mechanism for the thermal decomposition of titanium tetraisopropoxide

A kinetic mechanism for the thermal decomposition of titanium tetraisopropoxide

A comparative study of TiO2 nanoparticles synthesized in premixed and diffusion flames

A facile hydrothermal approach for construction of carbon coating on TiO2 nanoparticles

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