The photocatalytic reduction of Methyl Orange (MO) in aqueous solution by gold nanoparticles deposited by deposition–precipitation (DP) method on Degussa P25 was studied as a function of gold content. A shift to the red region on the UV spectra from 3.2 (Degussa P25) to 2.9–2.8 eV on the Au/TiO2 materials was observed by the presence Nike Basket Blazer Mid Femme of gold. High photocatalytic activity for the MO reduction using lamps of low energy UV–Vis emission (λ = 365, 418, 435 nm) was obtained for the Au/TiO2 semiconductors, improving the rate constant of reduction in a factor up to 3.2 times compared to TiO2 P25 Blazer Nike used as reference. These results evidence a very important role of gold in photoreduction reactions for organic compounds, in this particular case for the reduction of MO.
This paper is motivated by the observation that investment tends to accelerate when output is around trend. The model used to explain this observation is based on the capacity-constrained production setup in Hansen and Prescott [(2001) Manuscript], where capacity is constant over time, and on capital being owned by a fraction of the agents in the economy. When capacity is reached, the capital share Chaussure Nike Blazer Basse increases because its component from capacity ownership becomes positive. The concentration of capital ownership leads then to an acceleration of investment—generated by the desire of capital owners to smooth consumption—as well as to a deceleration of total consumption. The results from the calibrated model contribute, although only partially, to the explanation of the observed behavior.
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