溶凝膠法InTaO4於光纖反應器進行CO2光催化還原

王振益

doi:10.6342/NTU.2008.00605

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溶凝膠法InTaO4於光纖反應器進行CO2光催化還原

CO2 photoreduction using sol-gel prepared InTaO4 in optical-fiber reactor

王振益 , Masters　　Advisor：吳紀聖　　

繁體中文 DOI： 10.6342/NTU.2008.00605

銦鉭光觸媒；二氧化碳；光催化還原；光纖反應器；溶凝膠法；甲醇； NiO-InTaO4 ； photocatalyst ； CO2 ； carbon dioxide ； photoreduction ； photo reduction ； optical-fiber reactor ； sol-gel method ； methanol

Abstract │ Reference (74) │ Altmetrics

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CO2 reduction was investigated in this work using InTaO4 visible light photocatalyst to solve the greenhouse effects of CO2 and to produce renewable energy. InTaO4 is able to absorb visible light and allow the use of solar energy. The gas phase photo reduction was observed over a series of InTaO4 and NiO loaded catalyst prepared by the sol-gel method, thereafter catalysts were dip coated on optical fibers and calcined. SEM micrographs show a thin film coated on the optical fiber. The UV-VIS spectra of powdered InTaO4 as well as NiO loaded catalysts prepared via the same procedure indicate that both catalysts absorb visible light. XRD results of catalysts calcined at 1100°C show the crystallinity of InTaO4. A photoreactor with 216 optical fibers and 100W halogen visible light source was used in the photo-reduction of CO2. The production of methanol and traces other hydrocarbons were detected by GC/FID. The production rate of methanol at 25°C was 11.05μmol/g-hr, indicating that NiO/InTaO4 photocatalyst is able to reduce CO2 at low temperature. Increasing the reaction temperature to 75°C increases the production rate to 20.97 μmol/g-hr. This suggests that if solar energy is used, the heat from sunlight may also increase the production rate. Using solar energy, the production rate was 11.30μmol/g-hr which is comparable to the result using artificial visible light.

Reference ( 74 ) 〈TOP〉

1. A. Kudo, A. Tanaka, K. Domen, K. Maruya, K. Aika, T. Onishi, Photocatalytic Decomposition of Water over NiO-K4Nb6O17 Cacalyst, Journal of Catalysis, 111 (1988) 67-76.
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2. P.-W. Pan, Y.-W. Chen, Photocatalytic reduction of carbon dioxide on NiO/InTaO4 under visible light irradiation, Catalysis Communications, 8 (2007) 1546-1549.
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3. H. C. Chen, H. C. Chou, J. C. S. Wu, H. Y. Lin, Sol-gel prepared InTaO4 and its photocatalytic characteristics, Journal of Materials Research, 23 (2008) 1364-1370.
連結：
4. R. E. Marinangeli, D. F. Ollis, Photoassisted Heterogeneous Catalysis with Optical Fibers .1. Isolated Single Fiber, Aiche Journal, 23 (1977) 415-426.
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5. K. Sayama, R. Yoshida, H. Kusama, K. Okabe, Y. Abe, H. Arakawa, Photocatalytic decomposition of water into H2 and O2 by a two-step photoexcitation reaction using a WO3 suspension catalyst and an Fe3+/Fe2+ redox system, Chemical Physics Letters, 277 (1997) 387-391.
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