Visible light induced water cleavage in colloidal solutions of chromium-doped titanium dioxide particles

Borgarello, Enrico; Kiwi, J.; Gräetzel, Michael; Pelizzetti, Ezio; Visca, M.

doi:10.1021/ja00375a010

Cited by 598 publications

(314 citation statements)

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“…Solar panels for heating and production of electricity as such do not store energy, although batteries and chemical flow batteries are available and being improved. Two other major routes suggest themselves, for storing the collected photonic energy in the form of chemicals: -H 2 production by water splitting [11][12][13][14][15][16] -CO 2 reduction, combined with water oxidation (to O 2 ), yielding liquids such as alcohols or even hydrocarbons. This process is commonly referred to as artificial photosynthesis [17][18][19][20][21][22][23].…”

Section: Minerals (Including P and N In Suitable Formmentioning

confidence: 99%

“…Usually, the first step is the endothermic solar thermal dissociation of the metal oxide into the respective metal and oxygen (reaction (10)), in which M: metal, MO: metal-oxide). Subsequently, the metal can be used to split water to hydrogen (reaction (11)). The metal-oxide produced can be recycled back to the solar process, and a second conversion (reaction (10)) can be initiated.…”

Section: Thermochemical Cycles Under Considerationmentioning

confidence: 99%

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Functioning devices for solar to fuel conversion

Mul¹,

Schacht²,

Swaaij³

et al. 2012

Chemical Engineering and Processing: Process Intensification

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a b s t r a c tThis paper provides a perspective on the technologies capable of converting solar energy, CO 2 and H 2 O into an easy to use fuel. The paper addresses bio-based approaches, but mainly focuses on (i) the combination of photovoltaic (PV) devices and electrocatalysis, (ii) single unit operation by photocatalytic conversion, and (iii) solar thermal conversion. Each option is described in a general manner, including a brief evaluation of the advantages and disadvantages. Also suggestions for future research endeavours are given. Based on the used literature data, for electrocatalytic and photocatalytic technologies, dramatic improvements should be made in material optimization, as well as reactor design and operation. Large efficiency gains are necessary to enable use of these technologies in practice. Solar thermal conversion is more mature, and requires specific optimization in processing, as will be discussed.

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Section: Minerals (Including P and N In Suitable Formmentioning

confidence: 99%

Section: Thermochemical Cycles Under Considerationmentioning

confidence: 99%

Functioning devices for solar to fuel conversion

Mul¹,

Schacht²,

Swaaij³

et al. 2012

Chemical Engineering and Processing: Process Intensification

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“…The spectra of La 3 -TO show red shift compared with pure TiO 2 . This phenomenon can be attributed to the charge-transfer transition between 4f orbital electrons of rare earth ions and the TiO 2 conduction or valence band (Borgarello et al, 1982). Therefore, titania doped with La 3+ increased the absorption range in the visible-light region.…”

Section: Ftir and Uv-vis Analysismentioning

confidence: 99%

High Selectivity of Visible-Light-Driven La-doped TiO2 Photocatalysts for NO Removal

Huang

Cao

Kang

et al. 2017

Aerosol Air Qual. Res.

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Semiconductors mediated by rare earth metals (REMs) have attracted attention with regard to the degradation of pollutants. In order to enhance the visible response of TiO 2 , La-doped TiO 2 (La-TO) photocatalysts with visible-light-driven capacity for NO removal were successfully synthesized in this study via a facile sol-gel method followed by calcination. A series of La-TiO 2 samples with differing weight ratios were evaluated for their photocatalytic performances. It was found that 3% La integrated with TiO 2 (in mass ratio) could enhance the removal efficiency of NO (up to 32%) under solar light, which is more than twice that seen with pure TiO 2 . The resulting products were characterized by a series of techniques, such as XRD, FTIR, UV-vis DRS, BET and (photo)electrochemical analysis. The results indicated that La-doped TiO 2 can harvest visible light due to the relatively narrow band gap (from 2.98 to 2.75 eV). More importantly, La dopant improved electronhole separation and suppressed charge carrier recombination, due to the synergistic effect. Furthermore, La-doped TiO 2 increased the photo-oxidation efficiency of the transformation from NO to NO 3 -, owing to inhibition of the production of intermediate NO 2 (0.02%). To the best of our knowledge, this study is the first time that La-doped TiO 2 has been used to eliminate NO (at the ppb level) in the atmosphere. This study provides a facile and controllable route to fabricate La-TO photocatalyst for NO abatement with high selectivity of NO 2 under visible light.

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“…One approach was to substitute Cr, Fe or Ni for a Ti site. 56,57) Another approach was to form Ti 3þ sites by introducing an oxygen vacancy in TiO 2 . 58) However, these approaches were not widely accepted due to the lack of reproducibility and chemical stability.…”

Section: Visible-light-sensitive Tiomentioning

confidence: 99%

Electronic Structures and Optical Properties of(GaP)_n(AlP)_nShort-Period Superlattices withn=1to 6

Shibata¹,

Nakayama²,

Kamimura³

1994

Jpn. J. Appl. Phys.

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Visible light induced water cleavage in colloidal solutions of chromium-doped titanium dioxide particles

Cited by 598 publications

References 0 publications

Functioning devices for solar to fuel conversion

Functioning devices for solar to fuel conversion

High Selectivity of Visible-Light-Driven La-doped TiO2 Photocatalysts for NO Removal

Electronic Structures and Optical Properties of(GaP)_n(AlP)_nShort-Period Superlattices withn=1to 6

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Visible light induced water cleavage in colloidal solutions of chromium-doped titanium dioxide particles

Cited by 598 publications

References 0 publications

Functioning devices for solar to fuel conversion

Functioning devices for solar to fuel conversion

High Selectivity of Visible-Light-Driven La-doped TiO2 Photocatalysts for NO Removal

Electronic Structures and Optical Properties of(GaP)n(AlP)nShort-Period Superlattices withn=1to 6

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Product

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Electronic Structures and Optical Properties of(GaP)_n(AlP)_nShort-Period Superlattices withn=1to 6