Characteristics and properties of a novel in situ method of synthesizing mesoporous TiO2 nanopowders by a simple coprecipitation process without adding surfactant

Yeh, Shang-Wei; Ko, Horng‐Huey; Chiang, Hsiu-Mei; Chen, Yen-Ling; Lee, Jian-Hong; Wen, Chiu-Ming; Wang, Moo–Chin

doi:10.1016/j.jallcom.2014.05.227

Cited by 22 publications

(11 citation statements)

References 34 publications

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“…In addition, the mesoporous structure of the as-prepared samples results in multiple reflections of visible light within the hole, allowing the light source to be used more efficiently, which has been reported by many researchers [27]. The high BET surface area 113.3 m 2 g -1 of TiO 2 :(0.1 at% Cu) sample may offer enough photoactive sites and promote the reaction.…”

Section: +mentioning

confidence: 85%

Synthesis, characterization of Cu, N co-doped TiO2 microspheres with enhanced photocatalytic activities

Liu¹,

Zou²,

Hakala³

et al. 2017

Adv Mater Sci

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The mesoporous Copper, nitrogen co-doped TiO 2 microspheres was prepared via solvothermal approach, followed by nitriding treatment under an ammonia gas flow. The crystalline structures of the as-prepared catalyst and the chemical compositions of Cu,N co-doped TiO 2 were determined using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) respectively. The photocatalytic activity of the as-prepared sample was investigated by monitoring the degradation of Rhodamine-B under visible light irradiation.Experimental results indicated that mesoporous Cu,N co-doped TiO 2 microspheres showed higher photocatalytic activity than Cu-TiO 2 microspheres and anatase TiO 2 under visible light irradiation. The higher photocatalytic activity of the mesoporous Cu,N co-doped TiO 2 microspheres sample could be attributed to the synergistic effects of large BET surface area, extended light absorption, efficient charge separation which was stabilized by the presence of oxygen vacancies. It was discovered that, valence states maintain stability after nitriding treatment. The sample synthesized from 0.1% molar quantity of Cu dopant, and nitrided at 400℃ for 30 min gave the highest photocatalytic activity.

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Section: +mentioning

confidence: 85%

Synthesis, characterization of Cu, N co-doped TiO2 microspheres with enhanced photocatalytic activities

Liu¹,

Zou²,

Hakala³

et al. 2017

Adv Mater Sci

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“…5a and c, respectively. The isotherms are identified as type IV, which are typical characters of mesoporous materials [12]. For two samples, an adsorption and desorption hysteresis loop gradually increase and exhibit an abrupt increase in the high-pressure region as can be seen from Fig.…”

Section: Physical Characterizationmentioning

confidence: 77%

Submicron-sized mesoporous anatase TiO2 beads with trapped SnO2 for long-term, high-rate lithium storage

Liu

Zhu

Tian

et al. 2015

Journal of Alloys and Compounds

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“…TiO 2 is a promising material for technological applications for its versatility [1][2][3][4], abundance, low toxicity, good chemical stability, photosensitivity and photostability [5][6][7][8]. In nature, it is found mainly in the mineral ilmenite [9], that can be processed industrially by two different routes [10]: The first, involves the reaction of the concentrate of ilmenite with hot sulphuric acid, resulting in the formation of sulphates of titanium, Fe(II) and Fe(III), being these last eliminated by centrifugation, after cooling.…”

Section: Titanium Dioxide (Tio 2 )mentioning

confidence: 99%

Applications of Mesoporous Ordered Semiconductor Materials — Case Study of TiO2

Machado¹,

Borges²,

Silva³

et al. 2015

Solar Radiation Applications

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Additional information is available at the end of the chapter http://dx.doi.org/10.5772/59602 . Introduction . . Titanium dioxide TiOTiO is a promisinμ material λor technoloμical applications λor its versatility [ -], abundance, low toxicity, μood chemical stability, photosensitivity and photostability [ -]. In nature, it is λound mainly in the mineral ilmenite [ ], that can be processed industrially by two diλλerent routes [ ] The λirst, involves the reaction oλ the concentrate oλ ilmenite with hot sulphuric acid, resultinμ in the λormation oλ sulphates oλ titanium, Fe II and Fe III , beinμ these last eliminated by centriλuμation, aλter coolinμ. The λinal solution is then puriλied and hydrolyzed to produce pure TiO [ ]. The other usual way oλ obtaininμ consists in combininμ the ore with coke and μaseous chlorine under heatinμ, resultinμ in CO and a sponμy material rich in TiCl . The reaction product is subjected to successive λractional distillation, with the λormation oλ TiCl and TiCl , due to stability oλ titanium in other deμrees oλ oxidation. The diλλerent precursors oλ titanium are hydrolyzed, λorminμ titanium dioxide [ ]. In, [ ], obtained, λor the λirst time, success in decomposition oλ water under irradiation with liμht and without application oλ any electric potential. They reported that, in trials where they employed n-type TiO as anode and Platinum as cathode, when TiO electrode illuminated under short-circuit conditions, hydroμen evolved λrom the Platinum electrode, while oxyμen evolved λrom the anode. Since then, studies aimed at discoverinμ and explorinμ diλλerent possibilities oλ technoloμical application λor TiO have been μiven μreat importance [ -].© 2015 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and eproduction in any medium, provided the original work is properly cited.As technoloμical applications λor TiO can be cited its use in ultraviolet radiation absorbinμ λilters [ , ], in chemical sensors λor μases [ -], as a bactericide [ ], in biomaterials λor bone implants [ ], in environmental photocatalysis [ , , , ], in the photocatalytic hydroμen evolution [ , -], in dye-sensitized solar cells [ , -], amonμ other.The photocatalytic eλλiciency oλ TiO depends on its structural and morpholoμical characteristics, which are related to the method oλ synthesis used in the preparation oλ nanoparticles [ , , , ]. To be photoactive, λavorinμ the photocatalysis process, besides beinμ mainly consistinμ oλ anatase crystalline phase, the TiO must possess hiμh speciλic surλace area, μood porosity, with hiμh sized pores [ , , ]. In this context, the search λor TiO particles that have diλλerentiated λeatures, with catalytic properties potentiated, constitutes a λield oλ intense activity [ , , -]. . Porosity and porous materialsThe porosity, related to the presence oλ cavities, channels or interstices is oλ μreat importance since it is related t...

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Characteristics and properties of a novel in situ method of synthesizing mesoporous TiO2 nanopowders by a simple coprecipitation process without adding surfactant

Cited by 22 publications

References 34 publications

Synthesis, characterization of Cu, N co-doped TiO2 microspheres with enhanced photocatalytic activities

Synthesis, characterization of Cu, N co-doped TiO2 microspheres with enhanced photocatalytic activities

Submicron-sized mesoporous anatase TiO2 beads with trapped SnO2 for long-term, high-rate lithium storage

Applications of Mesoporous Ordered Semiconductor Materials — Case Study of TiO2

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