ZnO Nanorod Optical Disk Photocatalytic Reactor For .

ZnO nanorod optical disk photocatalytic reactorfor photodegradation of methyl orangeYu Lim Chen,1 Li-Chung Kuo,1 Min Lun Tseng,2 Hao Ming Chen,1,3 Chih-Kai Chen,3Hung Ji Huang,4 Ru-Shi Liu,3,5 and Din Ping Tsai1,2,6,*1Department of Physics, National Taiwan University, Taipei 10617, TaiwanGraduate Institute of Applied Physics, National Taiwan University, Taipei 10617, Taiwan3Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan4Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu 30076, Taiwan5rsliu@ntu.edu.tw6Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan*dptsai@phys.ntu.edu.tw2Abstract: A low-cost and efficient photocatalytic reactor for environmentaltreatment and green technology was presented. ZnO nanorods firmlygrowing on polycarbonate optical disk substrate are generally perpendicularto the substrate as the immobilized photocatalyst of the spinning diskreactor. The photocatalytic efficiency and durability of the ZnO nanorodsare effectively demonstrated. 2013 Optical Society of AmericaOCIS codes: (160.4236) Nanomaterials; (240.6670) Surface photochemistry; (220.0220)Optical design and fabrication; (160.6000) Semiconductor materials.References and links1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.A. Fujishima and K. Honda, “Electrochemical photolysis of water at a semiconductor electrode,” Nature238(5358), 37–38 (1972).M. R. Hoffmann, S. T. Martin, W. Y. Choi, and D. W. Bahnemann, “Environmental applications ofsemiconductor photocatalysis,” Chem. Rev. 95(1), 69–96 (1995).N. L. Tarwal and P. S. Patil, “Superhydrophobic and transparent ZnO thin films synthesized by spray pyrolysistechnique,” Appl. Surf. Sci. 256(24), 7451–7456 (2010).L. Lei, N. Wang, X. M. Zhang, Q. Tai, D. P. Tsai, and H. L. W. Chan, “Optofluidic planar reactors forphotocatalytic water treatment using solar energy,” Biomicrofluidics 4(4), 43004 (2010).H. M. Chen, C. K. Chen, C. C. Lin, R. S. Liu, H. Yang, W. S. Chang, K. H. Chen, T. S. Chan, L. F. Lee, and D.P. Tsai, “Multi-bandgap-sensitized ZnO nanorod photoelectrode arrays for water splitting: an x-ray absorptionspectroscopy approach for the electronic evolution under solar illumination,” J. Phys. Chem. C 115(44), 21971–21980 (2011).M. Kalbacova, J. M. Macak, F. Schmidt-Stein, C. T. Mierke, and P. Schmuki, “TiO2 nanotubes: photocatalyst forcancer cell killing,” Phys. Status Solidi RRL 2(4), 194–196 (2008).Y. Xie, Y. He, P. L. Irwin, T. Jin, and X. Shi, “Antibacterial activity and mechanism of action of zinc oxidenanoparticles against Campylobacter jejuni,” Appl. Environ. Microbiol. 77(7), 2325–2331 (2011).Y. J. Jang, C. Simer, and T. Ohm, “Comparison of zinc oxide nanoparticles and its nano-crystalline particles onthe photocatalytic degradation of methylene blue,” Mater. Res. Bull. 41(1), 67–77 (2006).H. Q. Liu, J. X. Yang, J. H. Liang, Y. X. Huang, and C. Y. Tangz, “Photo-degradation of methylene blue usingTa-doped ZnO nanoparticle,” J. Am. Chem. Soc. 91, 1287–1291 (2008).W. C. Lin, T. S. Kao, H. H. Chang, Y. H. Lin, Y. H. Fu, C. T. Wu, K. H. Chen, and D. P. Tsai, “Study of asuper-resolution optical structure: polycarbonate /ZnS-SiO2 /ZnO /ZnS-SiO2 /Ge2Sb2Te5 /ZnS-SiO2,” Jpn. J.Appl. Phys. 42(Part 1, No. 2B), 1029–1030 (2003).H. M. Chen, C. K. Chen, R. S. Liu, C. C. Wu, W. S. Chang, K. H. Chen, T. S. Chan, J. F. Lee, and D. P. Tsai, “Anew approach to solar hydrogen production: a ZnO–ZnS solid solution nanowire array photoanode,” Adv.Energy Mater. 1(5), 742–747 (2011).J. J. Chen, C. S. Wu, P. C. Wu, and D. P. Tsai, “Plasmonic photocatalyst for H2 evolution in photocatalytic watersplitting,” J. Phys. Chem. C 115(1), 210–216 (2011).D. J. Gargas, M. C. Moore, A. Ni, S. W. Chang, Z. Zhang, S. L. Chuang, and P. Yang, “Whispering gallerymode lasing from zinc oxide hexagonal nanodisks,” ACS Nano 4(6), 3270–3276 (2010).K. Okazaki, D. Nakamura, M. Higashihata, P. Iyamperumal, and T. Okada, “Lasing characteristics of anoptically pumped single ZnO nanosheet,” Opt. Express 19(21), 20389–20394 (2011).N. Xu, Y. Cui, Z. Hu, W. Yu, J. Sun, N. Xu, and J. Wu, “Photoluminescence and low-threshold lasing of ZnOnanorod arrays,” Opt. Express 20(14), 14857–14863 (2012).#184847 - 15.00 USD(C) 2013 OSAReceived 7 Feb 2013; revised 6 Mar 2013; accepted 6 Mar 2013; published 15 Mar 201325 March 2013 / Vol. 21, No. 6 / OPTICS EXPRESS 7240

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