Fabrication of mixed-crystalline-phase spindle-like TiO2 for enhanced photocatalytic hydrogen production

Hao, Rong; Jiang, Baojiang; Li, Mingxia; Xie, Ying; Fu, Honggang

doi:10.1007/s40843-015-0052-3

Cited by 30 publications

(15 citation statements)

References 29 publications

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“…More importantly, the UMTSs have a very high tap density and are thus capable of forming compact electrodes and yielding a high volumetric performance. They are expected to be promising materials in other fields, such as catalysis, photovoltaics, drug delivery, and sensors [39][40][41].…”

Section: Electrochemical Performance Of Umtssmentioning

confidence: 99%

Fast synthesis of uniform mesoporous titania submicrospheres with high tap densities for high-volumetric performance Li-ion batteries

et al. 2017

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High-tap density electrode materials are greatly desired for Li-ion batteries with high volumetric capacities to fulfill the growing demands of electric vehicles and portable smart devices. TiO2, which is one of the most attractive anode materials, is limited in their application for Li-ion batteries because of its low tap density (usually <1 g cm −3 ) and volumetric capacity. Herein, we report uniform mesoporous TiO2 submicrospheres with a tap density as high as 1.62 g cm −3 as a promising anode material. Even with a high mass loading of 24 mg cm −2 , the TiO2 submicrospheres have impressive volumetric capacities that are more than double those of their counterparts. Moreover, they can be synthesized with 100% yield and within a reaction time of~6 h by optimizing the experimental conditions and formation mechanism, exhibiting potential for large-scale production for industrial applications. Other mesoporous anode materials, i.e., hightap density mesoporous Li4Ti5O12 submicrospheres, are fabricated using the generalized method. We believe that our work provides a significant reference for the industrial production of mesoporous materials for Li-ion batteries with a high volumetric performance.

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Section: Electrochemical Performance Of Umtssmentioning

confidence: 99%

Fast synthesis of uniform mesoporous titania submicrospheres with high tap densities for high-volumetric performance Li-ion batteries

et al. 2017

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“…Titania (TiO2) has been regarded as one of the most efficient photocatalysts since the first report by Fujishima and Honda [3][4][5][6], because of its high catalytic activity, good stability and low toxicity. After that, huge progress towards improving the photocatalytic efficiency of TiO2 has been made [7], such as band-tailoring by element doping [8,9], constructing mesoporous and/or array structures [10][11][12][13], and plasmonic sensitizing [14,15].…”

Section: Introductionmentioning

confidence: 99%

Carbon coated Au/TiO2 mesoporous microspheres: a novel selective photocatalyst

Liu

Wang

et al. 2017

Sci. China Mater.

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Photocatalysts with desirable selectivity to transformation and purification of targeted pollutants are of great importance in water purification. Here, we demonstrate that selective photocatalysis can be realized by the assistance of gold-enhanced selective adsorption onto carbon-coated Au/TiO2 mesoporous microspheres (Au/TiO2@C-MM), which were prepared via a surfactant-assisted two-step method that involved the assembly of oleic acid-stabilized titania and gold nanoparticles into colloidal spheres in an emulsion using sodium dodecyl sulfate as a surfactant and the conversion of the surfactants into carbon under annealing in Ar. Due to the negatively charged amorphous carbon, the mesoporous structure, and the surface plasmon resonance absorption of the Au components, the Au/TiO2@C-MM shows enhanced charge-and size-selective adsorption properties, which enables the materials to have high selectivity in the photocatalytic process.

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“…As known, photolytic water splitting is promising if low-cost semiconductors with scalable preparation routes are used [52][53][54][55]. Recently, growing demands for metal-free photocatalysts based on earth-abundant elements (e.g., g-C 3 N 4 ) have attracted much attention [56][57][58][59].…”

Section: Resultsmentioning

confidence: 99%

N-doped graphene grown on silk cocoon-derived interconnected carbon fibers for oxygen reduction reaction and photocatalytic hydrogen production

et al. 2016

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Carbon-based metal-free catalysts are a promising substitute for the rare and expensive platinum (Pt) used in the oxygen reduction reaction. We herein report N-doped graphene (NG) that is exquisitely integrated into highly conductive frameworks, simultaneously providing more active sites and higher conductivity. The NG was in situ grown on carbon fibers derived from silk cocoon (SCC f ) using a simple one-step thermal treatment. The resulting product (NG-SCC f ), possessing a meso-/macroporous structure with three-dimensional (3D) interconnected networks, exhibits an onset potential that is only 0.1 V less negative than that of Pt/C and shows stability and methanol tolerance superior to those of Pt/C in alkaline media. Moreover, in the absence of Pt as co-catalyst, NG-SCC f shows a photocatalytic H 2 production rate of 66.0 μmol·h -1 ·g -1 , 4.4-fold higher than that of SCC f . This outstanding activity is intimately related to the in situ grown NG, hierarchically porous structure, and 3D interconnected networks, which not only introduce more active sites but also enable smooth electron transfer, mass transport, and effective separation of electron-hole pairs. Considering the abundance of the green raw material in combination with easy and low-cost preparation, this work contributes to the development of advanced sustainable catalysts in energy storage/conversion fields, such as electro-and photocatalysis.

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Fabrication of mixed-crystalline-phase spindle-like TiO2 for enhanced photocatalytic hydrogen production

Cited by 30 publications

References 29 publications

Fast synthesis of uniform mesoporous titania submicrospheres with high tap densities for high-volumetric performance Li-ion batteries

Fast synthesis of uniform mesoporous titania submicrospheres with high tap densities for high-volumetric performance Li-ion batteries

Carbon coated Au/TiO2 mesoporous microspheres: a novel selective photocatalyst

N-doped graphene grown on silk cocoon-derived interconnected carbon fibers for oxygen reduction reaction and photocatalytic hydrogen production

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