Combustion synthesis of porous titanium microspheres

Nersisyan, Hayk H.; Won, H.I.; Won, C.W.; Kim, J.B.; Park, S.M.; Kim, J.H.

doi:10.1016/j.matchemphys.2013.05.012

Cited by 12 publications

(2 citation statements)

References 18 publications

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“…In this study, as an alternative reducing agent to substitute metallic calcium, metallic magnesium powder is used. Nersisyan et al have synthesized Ti powders containing a small amount of oxygen from titanium dioxide through combustion synthesis directly utilizing magnesiothermic reduction [19,20].…”

Section: Introductionmentioning

confidence: 99%

Combustion synthesis of TiFe by utilizing magnesiothermic reduction

Deguchi

Yasuda

Chen

et al. 2015

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Combustion synthesis of TiFe by utilizing magnesiothermic reduction

Deguchi

Yasuda

Chen

et al. 2015

Journal of Alloys and Compounds

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“…The method has the defects of poor kinetic conditions and the presence of CaTiO 3 compounds, resulting in low reduction efficiency [18,19]. In the presence of additives, there are reports that excess Mg directly reduces TiO 2 (mole ratio of Mg/TiO 2 is greater than 2.0) [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sample Preparation Pressure on Transformation Law of Low-Valent Titanium Oxide in a Multi-Stage Reduction Process

Fan

Zhang

et al. 2020

Metals

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A novel method for preparing titanium powder by multi-stage reduction of TiO2 was proposed. Its core is the preparation of high-quality low-valent titanium oxide. In this paper, the effect mechanism of different sample preparation pressures on the preparation of low-valent titanium oxide by the primary reduction (self-propagating high-temperature synthesis mode, SHS) of the Mg-TiO2 system was studied. The results show that the generation of Mg thermal fluid is the key link of the self-sustaining chemical reaction of the Mg-TiO2 system. Titanium exists inα-Ti and TiO at the end of combustion, and constitutes a non-stoichiometric low-valent titanium oxide. The sample preparation pressure determines the proportion of pores reserved for Mg diffusion in the compacts and the contact area of the reactants, thereby determining the partitioning behavior and heat transfer effect of Mg thermal fluid during the combustion process. When the sample preparation pressure is 75 MPa (relative density is 0.66 ± 0.01), the combustion effect is optimal, and the low-valent titanium oxide with oxygen content of 15.1% can be obtained. It was subjected to deep reduction to obtain a titanium powder product with an oxygen content of 0.27%.

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Template‐free Fabrication of Hierarchical Macro‐/mesoporous N‐doped TiO₂/graphene Oxide Composites with Enhanced Visible‐light Photocatalytic Activity

Dai

Wang

Liu

et al. 2014

J Chinese Chemical Soc

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Hierarchical macro-/mesoporous N-doped TiO 2 /graphene oxide (N-TiO 2 /GO) composites were prepared without using templates by the simple dropwise addition mixed solution of tetrabutyl titanate and ethanol containg graphene oxide (GO) to the ammonia solution, and then calcined at 350 o C. The as-prepared samples were characterized by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area, X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and UV-Vis absorption spectroscopy. The photocatalytic activity was evaluated by the photocatalytic degradation of methyl orange in an aqueous solution under visible-light irradiation. The results show that N-TiO 2 / GO composites exhibited enhanced photocatalytic activity. GO content exhibited an obvious influence on photocatalytic performance, and the optimal GO addition content was 1 wt%. The enhanced photocatalytic activity could be attributed to the synergetic effects of three factors including the improved visible light absorption, the hierarchical macro-mesoporous structure, and the efficient charge separation by GO.

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Combustion synthesis of porous titanium microspheres

Cited by 12 publications

References 18 publications

Combustion synthesis of TiFe by utilizing magnesiothermic reduction

Combustion synthesis of TiFe by utilizing magnesiothermic reduction

Effect of Sample Preparation Pressure on Transformation Law of Low-Valent Titanium Oxide in a Multi-Stage Reduction Process

Template‐free Fabrication of Hierarchical Macro‐/mesoporous N‐doped TiO₂/graphene Oxide Composites with Enhanced Visible‐light Photocatalytic Activity

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Combustion synthesis of porous titanium microspheres

Cited by 12 publications

References 18 publications

Combustion synthesis of TiFe by utilizing magnesiothermic reduction

Combustion synthesis of TiFe by utilizing magnesiothermic reduction

Effect of Sample Preparation Pressure on Transformation Law of Low-Valent Titanium Oxide in a Multi-Stage Reduction Process

Template‐free Fabrication of Hierarchical Macro‐/mesoporous N‐doped TiO2/graphene Oxide Composites with Enhanced Visible‐light Photocatalytic Activity

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Product

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Template‐free Fabrication of Hierarchical Macro‐/mesoporous N‐doped TiO₂/graphene Oxide Composites with Enhanced Visible‐light Photocatalytic Activity