Abstract
Sun is the Earth’s ultimate and inexhaustible energy source. One of the best routes to remedy the CO2 problem is to convert it to valuable hydrocarbons using solar energy. In this study, CO2 was photocatalytically reduced to produce methanol, methane and ethylene in a steady-state optical-fiber reactor under artificial light and real sunlight irradiation. The photocatalyst was dip-coated on the optical fibers that enable the light to transmit and spread uniformly inside the reactor. The optical-fiber photoreactor, comprised of nearly 120 photocatalyst-coated fibers, was designed and assembled. The XRD spectra indicated the anatase phase for all photocatalysts. It is found that the methanol yield increased with UV light intensity. A maximum methanol yield of 4.12 μmole/g-cat h is obtained when 1.0 wt% Ag/TiO2 photocatalyst was used under a light intensity of 10 W/cm2. When mixed oxide, TiO2–SiO2, is doped with Cu and Fe metals, the resulting photocatalysts show substantial difference in hydrocarbon production as well as product selectivity. Methane and ethylene were produced on Cu–Fe loaded TiO2–SiO2 photocatalyst. Since dye-sensitized Cu–Fe/P25 photocatalyst can fully harvest the light energy of 400–800 nm from sunlight, its photoactivity was significantly enhanced. Finally, CO2 photoreduction was studied by in situ IR spectroscopy and possible mechanism for the photoreaction was proposed.
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Laws EA, Berning JL (1991) Bioresour Technol 37:25
Yamashita H, Fujii Y, Ichihashi Y, Zhang SG, Ikeue K, Park DR, Koyano K, Tatsumi T, Anpo M (1998) Catal Today 45:221
Anpo M, Yamashita H, Ichihashi Y, Ehara S (1995) J Electroanal Chem 396:21
Pathak P, Meziani MJ, Li Y, Cureton LT, Sun YP (2004) Chem Commun 10:1234
Tseng IH, Chang W-C, Wu JCS (2002) Appl Catal B: Environm 37:37
Lo CC, Hung CH, Yuan CS, Wu JF (2007) Sol Energy Mater Sol Cells 91:1765
Dey GR, Belapurkar AD, Kishore K (2004) J Photochem Photobiol A: Chem 163:503
Guan GQ, Kida T, Harada T, Isayama M, Yoshida A (2003) Appl Catal A: Gen 249:11
Guan GQ, Kida T, Yoshida A (2003) Appl Catal B: Environm 41:387
Yahaya AH, Gondal MA, Hameed A (2004) Chem Phys Lett 400:206
Chen H-C, Chou H-C, Wu JCS, Lin H-Y (2008) J Mater Res 23:1364
Pan PW, Chen YW (2007) Catal Commun 8:1546
Ozcan O, Yukruk F, Akkaya EU, Uner D (2007) Appl Catal B: Environm 71:291
Ozcan O, Yukruk F, Akkaya EU, Uner D (2007) Top Catal 44:523
Nguyen T-V, Wu JCS, Chiou C-H (2008) Catal Commun 9:2073
Hirose T, Maeno Y, Himeda Y (2003) JMol Catal A-Chem 193:27
Pathak P, Meziani MJ, Castillo L, Sun YP (2005) Green Chem 7:667
Sasirekha N, Basha SJS, Shanthi K (2006) Appl Catal B: Environm 62:169
Zhao ZH, Fan JM, Wang ZZ (2007) J Clean Prod 15:1894
Hofstadler K, Bauer R, Novalic S, Heisler G (1994) Environ Sci Technol 28:670
Danion A, Bordes C, Disdier J, Gauvrit JY, Guillard C, Lanteri P, Jaffrezic-Renault N (2004) J Photochem Photobiol A: Chem 168:161
Danion A, Disdier J, Guillard C, Abdelmalek F, Jaffrezic-Renault N (2004) Appl Catal B: Environm 52:213
Danion A, Disdier J, Guillard C, Abdelmalek F, Jaffrezic-Renault N (2006) Int J Appl Electrom 23:187
Danion A, Disdier J, Guillard C, Jaffrezic-Renault N (2007) J Photochem Photobiol A: Chem 190:135
Danion A, Disdier J, Guillard C, Paisse O, Jaffrezic-Renault N (2006) Appl Catal B: Environm 62:274
Peill NJ, Bourne L, Hoffmann MR (1997) J Photochem Photobiol A: Chem 108:221
Peill NJ, Hoffmann MR (1995) Environ Sci Technol 29:2974
Peill NJ, Hoffmann MR (1996) Environ Sci Technol 30:2806
Peill NJ, Hoffmann MR (1997) J Energ-T Asme 119:229
Peill NJ, Hoffmann MR (1998) Environ Sci Technol 32:398
Xu JJ, Ao YH, Fu DG, Lin J, Lin YH, Shen XW, Yuan CW, Yin ZD (2008) J Photochem Photobiol A: Chem 199:165
Chu T, Huang H, Tsai D (2006) Annual meeting of physics. American Physical Society, Taipei
Wu JCS, Lin HM, Lai CL (2005) Appl Catal A: Gen 296:194
Lo CF, Wu JCS (2005) J Chin Inst Chem Eng 36:119
Nguyen TV, Choi DJ, Yang OB (2005) Res Chem Intermed 31:483
Nguyen TV, Lee HC, Yang OB (2006) Sol Energy Mater Sol Cells 90:967
Wu JCS, Cheng Y-T (2006) J Catal 237:393
Wu J, Wu T-H, Chu T, Huang H, Tsai D (2008) Top Catal 47:131
Linsebigler AL, Lu GQ, Yates JT (1995) Chem Rev 95:735
Hirano K, Inoue K, Yatsu T (1992) J Photochem Photobiol A: Chem 64:255
Gattrell M, Gupta N, Co A (2006) J Electroanal Chem 594:1
Hori Y, Takahashi I, Koga O, Hoshi N (2002) J Phys Chem B 106:15
Hori Y, Wakebe H, Tsukamoto T, Koga O (1995) Surf Sci 335:258
Habibi MH, Hassanzadeh A, Zeini-Isfahani A (2006) Dyes Pigments 69:111
Tachibana H, Yamanaka Y, Sakai H, Abe M, Matsumoto M (2000) J Lumin 87–9:800
Kuroda S (2004) Adv Colloid Interface Sci 111:181
Anpo M, Aikawa N, Kubokawa Y (1984) J Phys Chem 88:3998
Inoue T, Fujishima A, Konishi S, Honda K (1979) Nature 277:637
Howe RF, Gratzel M (1987) J Phys Chem 91:3906
Serpone N, Lawless D, Disdier J, Herrmann J-M (1994) Langmuir 10:643
Fujishima A, Rao TN, Tryk DA (2000) J Photochem Photobiol C: Rev 1:1
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Wu, J.C.S. Photocatalytic Reduction of Greenhouse Gas CO2 to Fuel. Catal Surv Asia 13, 30–40 (2009). https://doi.org/10.1007/s10563-009-9065-9
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DOI: https://doi.org/10.1007/s10563-009-9065-9