Hybrid metal oxides quantum dots/TiO2 block composites: Facile synthesis and photocatalysis application

Chen, Jianwei; Shi, Jian‐Wen; Wang, Xu; Ai, Huiying; Cui, Hao‐Jie; Fu, Ming‐Lai

doi:10.1016/j.powtec.2013.05.014

Cited by 23 publications

(12 citation statements)

References 55 publications

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“…2b exhibit the N 2 adsorption-desorption isotherms of 5 wt% WO 3 /TiO 2 and 2 wt% MoO 3 /TiO 2 , respectively, as well as corresponding pore size distribution curves of two composites. The isotherms corresponding to both composites are classified as type IV-isotherms according to Brunauer-Deming-Deming-Teller (BDDT) classification [29,30]. It can be deduced that the pore size of samples was mainly distributed in the mesoporous range (pore diameters between 2 and 50 nm).…”

Section: Structure and Morpholgymentioning

confidence: 99%

Improvement of TiO2 photocatalytic properties under visible light by WO3/TiO2 and MoO3/TiO2 composites

Bai

Liu

Sun

et al. 2015

Applied Surface Science

141

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Section: Structure and Morpholgymentioning

confidence: 99%

Improvement of TiO2 photocatalytic properties under visible light by WO3/TiO2 and MoO3/TiO2 composites

Bai

Liu

Sun

et al. 2015

Applied Surface Science

141

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“…As technological applications for TiO 2 can be cited its use in ultraviolet radiation absorbing filters [3,23], in chemical sensors for gases [24][25][26], as a bactericide [27], in biomaterials for bone implants [28], in environmental photocatalysis [8,24,29,30], in the photocatalytic hydrogen evolution [17,[31][32][33][34][35][36], in dye-sensitized solar cells [21,[37][38][39][40][41][42][43][44], among other.…”

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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“…The heterojunction of semiconductors is extensively reported in literature, and different types of heterojunctions have been successfully applied in photocatalysis [10,14,16]. This fact is explained by the electron transfer from the conduction band of one semiconductor to the conduction band of the other and the hole transfer between the valence bands under the driving force of Fermi energy difference between the two semiconductors, decreasing the recombination rate and increasing the lifetime of the electron-hole pair [10,18].…”

Section: Btx Photodegradation Under Uva and Vis Lightmentioning

confidence: 99%

“…combining TiO 2 with other semiconductor oxides [2], or doping TiO 2 with small amounts of metals [11] and non-metals [12]. Mixed TiO 2 catalysts containing other oxides, such as ZnO [2,13], Cu x O and Fe x O [14], WO 3 [15], ZrO 2 [16] and composites like PbO/TiO 2 [17] have proved to yield beneficial effect on the photocatalytic activity when compared to bare TiO 2 . For this mixing strategy, the inhibitory effect on recombination is assigned to come from the different Fermi level between TiO 2 and another semiconductor [18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterisation and photocatalytic activity of N-doped TiO2–Nb2O5 mixed oxides

et al. 2015

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Hybrid metal oxides quantum dots/TiO2 block composites: Facile synthesis and photocatalysis application

Cited by 23 publications

References 55 publications

Improvement of TiO2 photocatalytic properties under visible light by WO3/TiO2 and MoO3/TiO2 composites

Improvement of TiO2 photocatalytic properties under visible light by WO3/TiO2 and MoO3/TiO2 composites

Applications of Mesoporous Ordered Semiconductor Materials — Case Study of TiO2

Synthesis, characterisation and photocatalytic activity of N-doped TiO2–Nb2O5 mixed oxides

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