Ti-DBS-LDHs as a Photocatalyst under Simulated Solar Radiation for Removal of Malachite Green
Abstract: Ti-DBS-LDHs were fleetly prepared by the technology of the microwave-crystallization and low saturated state of coprecipitation. The purposed samples were characterized by XRD and SEM. The results show that the synthesized Ti-DBS-LDHs with the slice layer have the structure of LDHs, indicating their preparations are successful under microwave irradiation. Ti-DBS-LDHs was then applied to the decolorization of malachite green (MG). The effects of Ti/Mg molar ratio, MG concentration, catalyst dosage, dye type and circle life on the decolorization were investigated. It is shown the percentage of decolorization can reach 100% under the optimum conditions. In addition, Ti-DBS-LDHs was reusable, the average decolorization percentage of 89.37% could be obtained, the decolorization performance was stable after 3 times usage without significant loss of its decolorization activity. Therefore, Ti-DBS-LDHs is a novel and efficient photocatalyst for the decolorization of MG.
文章引用: 陈春霞 , 乔淇 , 郭涛 , 吕占傲 , 李斌 (2012) Ti-DBS-LDHs光催化除去印染污水中的孔雀石绿。 材料科学， 2， 63-67. doi: 10.12677/ms.2012.22011
 Y. G. Liu, Y. Ohko, R. Q. Zhang, et al. Degradation of malachite green on Pd/WO3 photocatalysts under simulated solar light. Journal of Hazardous Materials, 2010, 184(103): 386-391.
 S. Srivastava, R. Sinha and D. Roy. Toxicological effects of malachite green. Aquatic Toxicology, 2004, 66(3): 319-329.
 B. H. Hameed, T. W. Lee. Degradation of malachite green in aqueous solution by Fenton process. Journal of Hazardous Materials, 2009, 164(2-3): 468-472.
 K. V. K. Rao. Inhibition of DNA synthesis in primary rat hepatocyte cultures by malachite green: A new liver tumors promoter. Toxicology Letters, 1995, 81(2-3): 107-113.
 L.G. Rushing, E. B. Hansen. Confirmation of malachite green, crystal violet and their leuco analogs in catfish and trout tissue by high-performance liquid chromatography utilizing electro- chemistry with ultraviolet-visible diode array detection and fluorescence detection. Journal of Chromatography, 1997, 700: 223-231.
 Y. S. Ho, G. McKay. Sorption of dye from aqueous solution by peat. Chemical Engineering Journal, 1998, 70(2): 115-124.
 K. R. Ramakrishna, T. Viraraghavan. Dye removal using low cost adsorbents. Water Science Technology, 1997, 36(2): 189- 196.
 G. McKay, H. S. Blair and J. R. Gardner. Rate studies for the adsorption of dyestuffs on chitin. Journal of Colloid and Interface Science, 1983, 95(1): 108-119.
 G. McKay. Analytical solution using a pore diffusion model for a pseudo irreversible isotherm for the adsorption of basic dye on silica. AIChE Journal, 1984, 30: 692-697.
 M. Farooq, I. A. Raja and A. Pervez. Photocatalytic degradation of TCE in water using TiO2 catalyst. Solar Energy, 2009, 83(9): 1527-1533.
 A. A. Ismail. Single-step synthesis of a highly active photocatalyst for oxidation of trichloroethylene. Applied Catalysis B: Environ- mental, 2008, 85(1): 33-39.
 M. M. Joshi, N. K. Labhsetwar, P. A. Mangrulkar, et al. Visible light induced photoreduction of methyl orange by N-doped mesoporous titania. Applied Catalysis A: General, 2009, 357(1): 26-33.
 Y. M. Ju, S. G. Yang, Y. C. Ding, et al. Visible light induced photoreduction of methyl orange by N-doped mesoporous titania. The Journal of Physical Chemistry A, 2008, 112(37): 11172- 11177.
 S. K. Mohapatra, N. Kondamudi, S. Banerjee, et al. Functiona- lization of self-organized TiO2 nanotubes with Pd nanoparticles for photocatalytic decomposition of dyes under solar light illumination. Langmuir, 2008, 24(19): 11276-11281.
 S. K. Pardeshi, A. B. Patil. A simple route for photocatalytic degradation of phenol in aqueous zinc oxide suspension using solar energy. Solar Energy, 2008, 82(8): 700-705.
 H. Tian, J. F. Ma, K. Li, et al. Photocatalytic degradation of methyl orange with W-doped TiO2 synthesized by a hydrothermal method. Materials Chemistry and Physics, 2008, 112(1): 47-51.
 A. Watcharenwong, W. Chanmanee, N. R. de Tacconi, et al. Anodic growth of nanoporous WO3 films: Morphology, photoelectrochemical response and photocatalytic activity for methylene blue and hexavalent chrome conversion. Journal of Electroanalytical Chemistry, 2008, 612(1): 112-120.
 M. R. Hoffmann, S. T. Martin, W. Y. Choi, et al. Environmental applications of semiconductor photocatalysis. Chemical Reviews, 1995, 95(1): 69-96.
 F. Cavani, F. Trifiro and A. Vaccari. Hydrotalcite-type anionic clays: Preparation, properties and app1ications. Catalysis Today, 1991, 11(2): 173-301.
 C. X. Chen, C. H. Xu, L. R. Feng, et al. Effect of rare earth doping on the catalytic activity of copper-containing hydrotalcites in phenol hydroxylation. Advanced Synthesis & Catalysis, 2005, 347(14): 1848-1854.
 A. Vaccari. Preparation and catalytic properties of cationic and anionic clays. Catalysis Today, 1998, 41(1-3): 53-71.
 Y. F. Zhao, M. Wei, J. Lu, et al. Biotemplated hierarchical nanostructure of layered double hydroxides with improved photocatalysis performance. ACS Nano, 2009, 3(12): 4009-4016.
 Y. Zhi, Y. Li, Q. Zhang, et al. ZnO nanoparticles immobilized on flaky layered double hydroxides as photocatalysts with enhanced adsorptivity for removal of acid red G. Langmuir, 2010, 26(19): 15546-15553.
 S. Huang, H. Peng, W. W. Tjiu, et al. Assembling exfoliated layered double hydroxide (LDH) nanosheet/carbon nanotube (CNT) hybrids via electrostatic force and fabricating nylon nanocomposites. Journal of Physical Chemistry B, 2010, 114 (50): 16766-16772.
 J. S. Valente, F. Tzompantzi and J. Prince. Highly efficient photocatalytic elimination of phenol and chlorinated phenols by CeO2/MgAl layered double hydroxides. Applied Catalysis B, 2011, 102(1-2): 276-285.
 S. C. Gomes, Y. Bouizi, V. Fornés, et al. Layered double hydroxides as highly efficient photocatalysts for visible light oxygen generation from water. Journal of American Chemical Society, 2009, 131(38): 13833-13839.
 Y. F. Zhao, S. He, M. Wei, et al. Hierarchical films of layered double hydroxides by using a sol-gel process and their high adaptability in water treatment. Chemical Community, 2010, 46: 3031-3033.