Photocatalytic reduction of carbon dioxide to methane and acetic acid by an aqueous suspension of metal-deposited TiO2

Ishitani, Osamu; Inoue, Chieko; Suzuki, Y.; Ibusuki, Takashi

doi:10.1016/1010-6030(93)80023-3

Cited by 208 publications

(116 citation statements)

References 13 publications

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“…Experiments run in the range of 0.05-0.30 g of catalyst, under the conditions specified in Scheme 1, showed a maximum HCO 2 H yield (208.5 mol/g cat −1 ) in the presence of 0.05 g of catalyst; this value is several times higher than those obtained by Ishitani et al [19], Hirano et al [20] and Kaneco et al…”

Section: Resultscontrasting

confidence: 42%

Turning lipophilic phthalocyanines/TiO2 composites into efficient photocatalysts for the conversion of CO2 into formic acid under UV–vis light irradiation

Mele

Annese

Riccardis

et al. 2014

Applied Catalysis A: General

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a b s t r a c tMetal-free, Cu(II)-or Zn(II) tetrakis [4-(2,4-bis-(1,1-dimethylpropyl)phenoxy)]phthalocyanines loaded over TiO 2 (anatase) proved to be active in the photoreduction of CO 2 to formic acid (HCO 2 H) in water under UV-vis light. CuPc/TiO 2 is catalyst of choice, allowing to reach a maximum yield of HCO 2 H, unequalled by any other similar catalytic systems. Because of their low environmental impact, low potential cost, and efficient power conversion, these multipurpose materials show promise in the setup of sustainable methods for CO 2 valorization.

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Section: Resultscontrasting

confidence: 42%

Turning lipophilic phthalocyanines/TiO2 composites into efficient photocatalysts for the conversion of CO2 into formic acid under UV–vis light irradiation

Mele

Annese

Riccardis

et al. 2014

Applied Catalysis A: General

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“…Semiconductor photocatalytic reactions, such as water splitting, [1][2][3][4][5][6][7][8] dehydrogenation of alcohols, 9-13 mineralization of organic compounds in water, [14][15][16][17] organic syntheses, [18][19][20][21][22] and reductive fixation of carbon dioxide, [23][24][25][26][27][28][29] are of great importance for both fundamental studies and practical applications. Among the various semiconductor photocatalysts, titanium(IV) oxide (TiO 2 ) is one of the most popular and promising materials because it is stable in various solvents under photoirradiation, it is available commercially, and it can induce various types of redox reactions.…”

Section: Introductionmentioning

confidence: 99%

Correlation between Some Physical Properties of Titanium Dioxide Particles and Their Photocatalytic Activity for Some Probe Reactions in Aqueous Systems

et al. 2002

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Nanocrystalline anatase titanium(IV) oxide (TiO 2 ) particles were synthesized by hydrothermal crystallization in organic media (HyCOM) followed by calcination at various temperatures up to 1273 K, and they were characterized by analysis of surface adsorption of the substrates, as well as by X-ray diffraction (XRD) and Brunauer-Emmet-Teller (BET) surface area measurements. These HyCOM TiO 2 samples were used for three kinds of photocatalytic reactions: mineralization of acetic acid (AcOH) in aerated aqueous suspensions, dehydrogenation of 2-propanol (2-PrOH) by in situ platinized powders, and silver-metal deposition from silver ions (Ag + ) in deaerated aqueous suspensions of bare TiO 2 samples. Dependence of the photocatalytic activities on calcination temperature (T c ) and on the amount of adsorbed substrates in each reaction and correlations with the physical properties of HyCOM TiO 2 were examined. In the case of mineralization of AcOH, the activitiy of each sample was almost proportional to the amount of surface-adsorbed AcOH in the dark, and the uncalcined (as-prepared) HyCOM TiO 2 showed the highest activity, which was monotonically reduced with T c , that is, with decrease in the amount of surface-adsorbed AcOH. On the other hand, in the case of silver-metal deposition, the photocatalytic activity was enhanced by calcination at higher temperature, despite the simultaneous decrease in the amount of surface-adsorbed Ag + in the dark. Overall, the effects of calcination on the photocatalytic activities for several reaction systems strongly suggested that photocatalytic activity depends on two significant factors, adsorbability and recombination probability, corresponding to the specific surface area and crystallinity, respectively, and that the balance of these two factors determines the T c dependence.

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“…In a heterogeneous system, photoreduction of CO 2 was confirmed by experiments using an isotope (Ishitani et al 1993). To our knowledge, however, the isotopic method has not been applied to the confirmation of the photoreduction of CO 2 in a homogeneous system using the colloidal dispersion of metal nanoparticles.…”

Section: Strategy For the Demonstration Of The Methane Generation Fromentioning

confidence: 93%

Self-Organization of Silver-Core Bimetallic Nanoparticles and Their Application for Catalytic Reaction

Hirakawa¹

2012

Smart Nanoparticles Technology

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Photocatalytic reduction of carbon dioxide to methane and acetic acid by an aqueous suspension of metal-deposited TiO2

Cited by 208 publications

References 13 publications

Turning lipophilic phthalocyanines/TiO2 composites into efficient photocatalysts for the conversion of CO2 into formic acid under UV–vis light irradiation

Turning lipophilic phthalocyanines/TiO2 composites into efficient photocatalysts for the conversion of CO2 into formic acid under UV–vis light irradiation

Correlation between Some Physical Properties of Titanium Dioxide Particles and Their Photocatalytic Activity for Some Probe Reactions in Aqueous Systems

Self-Organization of Silver-Core Bimetallic Nanoparticles and Their Application for Catalytic Reaction

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