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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29416

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Environmental Analysis of the Zinc Oxide Nanophotocatalyst Synthesis
Nanophotocatalysts such as titanium (TiO2), zinc (ZnO), and iron (Fe2O3) oxides can be used in organic pollutants oxidation, and in many other applications. But among the challenges for technological application (scale-up) of the nanotechnology scientific developments two aspects are still little explored: research on environmental risk of the nanomaterials preparation methods, and the study of nanomaterials properties and/or performance variability. The environmental analysis was performed for six different methods of ZnO nanoparticles synthesis, and showed that it is possible to identify the more environmentally compatible process even at laboratory scale research. The obtained ZnO nanoparticles were tested as photocatalysts, and increased the degradation rate of the Rhodamine B dye up to 30 times.
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[1] P. Krüger, “Nanotechnology for a sustainable economy,” in Proc. EuroNanoForum, Prague, 2009, pp. 3–9.
[2] T. Masciangioli, W.-X. Zhang, “Environmental technologies at the nanoscale,” Environ. Sci. Technol., vol. 37, no. 5, pp. 102A–108A, Mar. 2003.
[3] A. S. Stasinakis, “Use of selected advanced oxidation processes (AOPs) for wastewater treatment – A Mini Review,” Global NEST J., vol. 10, no. 1, pp. 376–385, 2008.
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[7] S. M. Ponder, J. G. Darab, T. E. Mallouk, “Remediation of Cr(VI) and Pb(II) aqueous solutions using supported, nanoscale zero valent iron,” Environ. Sci. Technol., vol. 34, no. 12, pp. 2564–2569, Mai. 2000.
[8] R. F. S. Salazar, H. J. Izáio-Filho, “Aplicação de processo oxidativo avançado baseado em fotocatálise heterogênea (TiO2/UVsolar) para o pré-tratamento de afluente lácteo,” Augm_Domus, vol. 1, no. 1, pp. 27– 44, 2009.
[9] T. A. Kandiel, A. Feldhoff, L. Robben, R. Dillert, D. W. Bahnemann, “Tailored titanium dioxide nanomaterials: anatase nanoparticles and brookite nanorods as highly active photocatalysts,” Chem. Mater., vol. 22, no. 6, pp. 2050–2060, Feb. 2010.
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[11] S. I. Shah, W. Li, C. P. Huang. O. Jung, C. Ni, “Study of Nd3+, Pd2+, Pt4+, and Fe3+ dopant effect on photoreactivity of TiO2 nanoparticles,” Proc. Natl. Acad. Sci. U. S. A., vol. 99, no. 2, pp. 6482–6486, Mar. 2002.
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[15] X. Zhou, H. Yang, C. Wang, X. Mao, Y. Wang, Y. Yang, G. Liu, “Visible light induced photocatalytic degradation of Rhodamine B on one-dimensional iron oxide particles,” J. Phys. Chem. C, vol. 114, no. 40, pp. 17051–17061, Sep. 2010.
[16] Z. Jiao, J. Wang, L. Ke, X. W. Sun, H. V. Demir, “Morphology-tailored synthesis of tungsten trioxide (hydrate) thin films and their photocatalytic properties,” ACS Appl. Mater. Interfaces, vol. 3, no. 2, pp. 229–236, Nov. 2011.
[17] D. Solís-Casados, E. Vigueras-Santiago, S. Hernández-López, M. A. Camacho-López, “Characterization and photocatalytic performance of tin oxide,” Ind. Eng. Chem. Res., vol. 48, no. 3, pp. 1249–1252, Jan. 2009.
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[19] P. J. Alvarez, “Nanotechnology in the environment - the good, the bad, and the ugly,” J. Environ. Eng., vol. 132, no. 10, pp. 1233–1233, Oct. 2006.
[20] N. Lubick, “Risks of nanotechnology remain uncertain,” Environ. Sci. Technol., vol. 42, no. 6, pp. 1821-1824, Mar. 2008.
[21] P. J. J. Alvarez, V. Colvin, J. Lead, V. Stone, “Research priorities to advance eco-responsible nanotechnology,” ACS Nano, vol. 3, no. 7, pp. 1616–1616, Jul. 2009.
[22] M. R. Wiesner, G. V. Lowry, K. L. Jones, M. F. Hochella Jr., R. T. Di Giulio, E. Casman, E. S. Bernhardt, “Decreasing uncertainties in assessing environmental exposure, risk, and ecological implications of nanomaterials,” Environ. Sci. Technol., vol. 43, no. 17, pp. 6458–6462, Jul. 2009.
[23] N. Lubick, “Hunting for engineered nanomaterials in the environment,” Environ. Sci. Technol., vol. 43, no. 7, pp. 6446–6447, Jul. 2009.
[24] J. A. Dahl, B. L. S. Maddux, J. E. Hutchison, “Toward greener nanosynthesis”, Chem. Rev., vol. 107, no. 6, pp. 2228–2269, Jun. 2007.
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