Colloidal semiconductors as photocatalysts for solar energy conversion

Kamat, Prashant V.; Dimitrijević, Nada M.

doi:10.1016/0038-092x(90)90070-s

Cited by 134 publications

(39 citation statements)

References 250 publications

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“…The anatase phase of TiO , which is the stable phase at low temperatures, has gained importance as a photo-catalyst (6) for photodecomposition and solar energy conversion because of its high photoactivity (7,8). TiO shows di!erent electrical characteristics with oxygen partial pressure, because it has wide chemical stability and a nonstoichiometric phase region.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Characterization, and Spectral Studies on Nanocrystalline Anatase TiO2

Reddy

Manorama

2001

Journal of Solid State Chemistry

197

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Section: Introductionmentioning

confidence: 99%

Preparation, Characterization, and Spectral Studies on Nanocrystalline Anatase TiO2

Reddy

Manorama

2001

Journal of Solid State Chemistry

197

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“…The third strategy is to exploit scaling laws and specific effects at the nanoscale [53][54][55][56] to overcome the limiting problems of metal oxide absorbers, such as their short electron-hole lifetimes and low mobility. This nanostructuring strategy has gained significant interest in the last 20 years [57][58][59][60][61][62][63][64][65][66][67] and is the focus of this chapter.…”

Section: Photoelectrochemical Water Splitting As a Pathway To Sustainmentioning

confidence: 99%

“…Because of the problems above, the number of known nanoscale photocatalysts for overall water splitting is limited [57][58][59][60][61][62][63][64][65][66]. Only five nanoscale photocatalysts have been reported in the literature.…”

Section: Interparticle Charge Transportmentioning

confidence: 99%

Nanoscale Effects in Water Splitting Photocatalysis

Osterloh

2015

Topics in Current Chemistry

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From a conceptual standpoint, the water photoelectrolysis reaction is the simplest way to convert solar energy into fuel. It is widely believed that nanostructured photocatalysts can improve the efficiency of the process and lower the costs. Indeed, nanostructured light absorbers have several advantages over traditional materials. This includes shorter charge transport pathways and larger redox active surface areas. It is also possible to adjust the energetics of small particles via the quantum size effect or with adsorbed ions. At the same time, nanostructured absorbers have significant disadvantages over conventional ones. The larger surface area promotes defect recombination and reduces the photovoltage that can be drawn from the absorber. The smaller size of the particles also makes electron-hole separation more difficult to achieve. This chapter discusses these issues using selected examples from the literature and from the laboratory of the author.

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“…At present, titania has been considered as one of the most studied semiconductors and widely used in gas sensors [1], as a pigment [2], in solar-energy conversion [3,4] and as a promising photocatalyst for water and air purification [5] because of its high oxidative power, chemical stability, low cost and nontoxicity [6]. Titania is also used as a photocatalyst to initiate polymerization of vinyl monomers without adding any photosensitizers, which has acquired important progresses in this aspect [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic polymerization induced by a transparent anatase titania aqueous sol and fabrication of polymer composites

Wang¹,

Wang

Song³

et al. 2010

Express Polym. Lett.

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Abstract. The surface modification of the anatase titania nanoparticles prepared via a controlled nonhydrolytic sol-gel process is achieved by the formation of the bidentate coordination between titania and methacrylic acid (MAA) molecules. The in situ photocatalytic polymerization of methyl methacrylate (MMA) monomer is initiated by surface modified anatase titania nanoparticles under Xe lamp irradiation. A variety of techniques including differential scanning calorimetry (DSC), thermo-gravimetric analysis (TGA) and scanning electron microscopy (SEM) are employed to characterize the resulting materials. The glass transition temperatures and the thermal stabilities of polymethyl methacrylate (PMMA) composite materials prepared via photocatalytic polymerization are enhanced compared with pure polymer. The partial aggregation of titania nanoparticles in PMMA composite films is derived from the surface polymerization of MMA, which makes the inorganic particles hydrophobic and drives them to the water/oil interfaces.

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Colloidal semiconductors as photocatalysts for solar energy conversion

Cited by 134 publications

References 250 publications

Preparation, Characterization, and Spectral Studies on Nanocrystalline Anatase TiO2

Preparation, Characterization, and Spectral Studies on Nanocrystalline Anatase TiO2

Nanoscale Effects in Water Splitting Photocatalysis

Photocatalytic polymerization induced by a transparent anatase titania aqueous sol and fabrication of polymer composites

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