Substrate dependent photocatalytic performance of TiO2/MWCNT photocatalysts

Réti, Balázs; Mogyorósi, Károly; Dombi, András; Hernádi, Klára

doi:10.1016/j.apcata.2013.10.001

Cited by 56 publications

(37 citation statements)

References 19 publications

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“…Biocompatibility is a key property in bioapplications, including delivery of bioactive molecules [6,7], tissue engineering [8], development of biosensors [9], biomimetic [10] and antibacterial materials [11]. Since the discovery of the photoelectric effect in titania [12], enormous effort has been made to develop photocatalytic systems composed of titanium oxide nanostructures or their composites [13][14][15][16][17]. It was also discovered that the shape [18] of the titania particles and the ionic environment [19] influences the photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ionic Compounds of Different Valences on the Stability of Titanium Oxide Colloids

Muráth

Sáringer

Somosi

et al. 2018

Colloids and Interfaces

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Titanium oxide particles of various morphologies have been prepared for applications of scientific or industrial interest in recent decades. Besides development of novel synthetic routes and solid-state characterization of the obtained particles, colloidal stability of titanium oxide dispersions was the focus of numerous research groups due to the high importance of this topic in applications in heterogeneous systems. The influence of dissolved ionic compounds, including monovalent salts, multivalent ions and polyelectrolytes, on the charging and aggregation behaviour of titanium oxide materials of spherical and elongated structures will be discussed in the present review.

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Section: Introductionmentioning

confidence: 99%

Effect of Ionic Compounds of Different Valences on the Stability of Titanium Oxide Colloids

Muráth

Sáringer

Somosi

et al. 2018

Colloids and Interfaces

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“…for NH 3 [1], photocatalyst [2][3][4][5][6][7], photoelectrochemical catalyst [3,[8][9][10], antibacterial material [2], easy-to-clean material [11], anode in lithium ion batteries [12] and dyesensitised solar cells [13]. When it is illuminated by UV light, electrons in the valence band are promoted to the conduction band inducing the formation of electron-hole (e --h ? )…”

Section: Introductionmentioning

confidence: 99%

Doping TiO2 films with carbon nanotubes to simultaneously optimise antistatic, photocatalytic and superhydrophilic properties

Léonard

Remy

Heinrichs

2016

J Sol-Gel Sci Technol

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Pure and multiwall carbon nanotube (MWCNT)-doped titanium dioxide (TiO 2 ) films, synthesised from two sol-gel routes (alcoholic and aqueous) and deposited by dipcoating on glass, have been developed as conductive, photocatalytic and superhydrophilic materials. While already crystallised in anatase structure at low temperature when synthesised in water, samples prepared in alcohol are amorphous. Their crystallisation in air has been studied at increasing temperatures. Effective incorporation of functionalised MWCNTs is confirmed in both aqueous and alcoholic samples with a closer interaction with TiO 2 particles in the case of aqueous synthesis. In alcoholic samples, 400°C seems to be an optimised calcination temperature since 300°C does not allow crystallisation into anatase and 500°Cremoves MWCNTs through burning. The purpose of MWCNT doping is to obtain coatings that exhibit easy-toclean or self-cleaning properties. This can be achieved through an optimised combination of electrical conductivity (for antistatic property), photoactivity and superhydrophilicity. These three properties require the crystallisation of TiO 2 into anatase. MWCNT doping dramatically increases both conductivity and photocatalytic activity, especially in alcoholic samples for the former and in aqueous samples for the latter. On the other hand, MWCNT introduction does not significantly affect the (super)hydrophilicity of films, which depends solely on the crystallinity of TiO 2 . Graphical Abstract

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“…Several recent studies have investigated the utility of coupling TiO 2 to carbon materials, such as carbon nanotubes (CNTs), as an effective way to prevent the aggregation of oxide particles, leading to increased rates of photocatalytic oxidation of pollutants, or to decrease the rate of electron-hole recombination [13][14][15] by acting as sinks for photogenerated electrons in TiO 2 , 16,17 due to the favourable energetics of their electronic band structures, and they have been demonstrated a to have a helpful impact on the photocatalytic activity of H 2 production, by actuating synergies between the metal oxide and the carbon phase. 8,[18][19][20] For example, multi-walled carbon nanotubes (MWCNTs) 9,[21][22][23] and single-walled carbon nanotubes (SWCNTs) 11,24 have been investigated to couple with TiO 2 , and the subsequent photoactivities are without a doubt moved forward. The accessible library of nanostructured catalysts has likewise proven that the combination of three nanomaterials represents a powerful strategy to increase more profoundly the various processes taking place during photocatalysis and, eventually, to increase the efficiency of energy conversion processes.…”

Section: Introductionmentioning

confidence: 99%

Sonochemical/hydration—dehydration synthesis of Pt—TiO2 NPs/decorated carbon nanotubes with enhanced photocatalytic hydrogen production activity

Abdulrazzak

Hussein

Alkaim

et al. 2016

Photochem Photobiol Sci

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Modified Pt-TiO 2 NPs/decorated carbon nanotubes were synthesized utilizing sonochemical/hydrationdehydration techniques. Pt was loaded on TiO 2 by a photodeposition method keeping in mind the end goal to achieve electron-hole pair separation and promote the surface reaction. The morphological and basic properties of Pt-TiO 2 /fCNTs were investigated by field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) and Raman spectroscopy. The selected area electron diffraction (SAED) patterns of Pt-TiO 2 /fCNTs were obtained utilizing TEM-based energy dispersive X-ray spectroscopy (EDXS) analysis. It was found that the TiO 2 nanoparticles were uniformly distributed on the fCNTs, and the Pt particles were decorated on the surface of TiO 2 /fCNTs. The photocatalytic hydrogen production activity of the Pt (0.5%) -TiO 2 /fCNTs (0.5%) nanoparticle composites was investigated using a sacrificial agent methanol solution. Pt-loaded TiO 2 demonstrated a hydrogen evolution rate around 20 times that of TiO 2 /fCNTs (0.5%) (fSWCNTs, fMWCNTs). When compared with platinized TiO 2 in methanol, which was utilized as a control material, Pt-TiO 2 /fCNTs demonstrated an almost 2-fold increment in hydrogen generation.

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Substrate dependent photocatalytic performance of TiO2/MWCNT photocatalysts

Cited by 56 publications

References 19 publications

Effect of Ionic Compounds of Different Valences on the Stability of Titanium Oxide Colloids

Effect of Ionic Compounds of Different Valences on the Stability of Titanium Oxide Colloids

Doping TiO2 films with carbon nanotubes to simultaneously optimise antistatic, photocatalytic and superhydrophilic properties

Sonochemical/hydration—dehydration synthesis of Pt—TiO2 NPs/decorated carbon nanotubes with enhanced photocatalytic hydrogen production activity

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