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Synthesis and characterization of anatase TiO2 nanolayer coating on Ni–Cu–Zn ferrite powders for magnetic photocatalyst

  • Yen-Pei Fu, Wen-Ku Chang, Hsin-Chao Wang (a1), Chung-Wen Liu and Cheng-Hsiung Lin (a2)...

Abstract

In the current research, we successfully prepared TiO2/Ni–Cu–Zn ferrite composite powder for magnetic photocatalyst. The core Ni–Cu–Zn ferrite powder was synthesized using the steel pickling liquor and the waste solution of electroplating as the starting materials. The shell TiO2 nanocrystal was prepared by sol-gel hydrolysis precipitation of titanium isopropoxide [Ti(OC3H7)4] on the Ni–Cu–Zn ferrite powder followed by heat treatment. From transmission electron microscopy (TEM) image, the thickness of the titania shell was found to be approximately 5 nm. The core of Ni–Cu–Zn ferrite is spherical or elliptical shape, and the particle size of the core is in the range of 70–110 nm. The magnetic Ni–Cu–Zn ferrite nanopowder is uniformly encapsulated in a titania layer forming core-shell structure of TiO2/Ni–Cu–Zn ferrite powder. The degradation efficiency for methylene blue (MB) increases with magnetic photocatalyst (TiO2/Ni–Cu–Zn ferrite powder) content. When the magnetic photocatalyst content is 0.40 g in 150 mL of MB, the photocatalytic activity reached the largest value. With a further increase in the content of magnetic photocatalyst, the degradation efficiency slightly decreased. This occurs because the ultraviolet (UV) illumination is covered by catalysts, which were suspended in the methylene blue solution and resulted in the inhibition in the photocatalytic reaction. The photocatalytic degradation result for the relationship between MB concentration and illumination revealed a pseudo first-order kinetic model of the degradation with the limiting rate constant of 1.717 mg/L·min and equilibrium adsorption constant 0.0627 L/mg. Furthermore, the Langmuir–Hinshelwood model can be used to describe the degradation reaction, which suggests that the rate-determining step is surface reaction rather than adsorption is in photocatalytic degradation.

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Corresponding author

a)Address all correspondence to this author. e-mail: d887503@alumni.nthu.edu

References

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1.Wang, C.Y., Bottcher, C., Bahnemann, D.W., Dohrmann, J.K.A comparative study of nanometer sized Fe(III)-doped TiO2 photocatalysts: Synthesis, characterization and activity. J. Mater. Chem. 13, 2322 (2003)
2.Shang, J., Li, W., Zhu, Y.F.Structure and photocatalytic characteristics of TiO2 film photocatalyst coated on stainless steel webnet. J. Mol. Catal. 202, 187 (2003)
3.Tennakone, K., Kottegoda, I.R.M.Photocatalytic mineralization of paraquat dissolved in water by TiO2 supported on polythene and polypropylene films. J. Photochem. Photobiol., A 93, 79 (1996)
4.Jackson, N.B., Wang, C.W., Luo, Z., Schwitzgebel, J., Ekerdt, J.G., Brock, J.R., Heller, A.Attachment of TiO2 powders to hollow glass microbeads: Activity of the TiO2-coated beads in the photoassisted oxidation of ethanol to acetaldehyde. J. Electrochem. Soc. 138, 3660 (1991)
5.Tada, H., Tanaka, M.Dependence of TiO2 photocatalytic activity upon its film thickness. Langmuir 13, 360 (1997)
6.Gao, Y., Chen, B.H., Li, H.L., Ma, Y.X.Preparation and characterization of a magnetically separated photocatalyst and its catalytic properties. Mater. Chem. Phys. 80, 348 (2003)
7.Chen, F., Zhao, J.C.Preparation and photocatalytic properties of a novel kind of loaded photocatalyst of TiO2/SiO2/γ-Fe2O3. Catal. Lett. 58, 245 (1999)
8.Beydoun, D., Amal, R., Low, G.K.C., McEvoy, S.Occurrence and prevention of photodissolution at the phase junction of magnetite and titanium dioxide. J. Mol. Catal. A: Chem. 180, 193 (2002)
9.Beydoun, D., Amal, R.Implications of heat treatment on the properties of a magnetic iron oxide–titanium dioxide photocatalyst. Mater. Sci. Eng., B 94, 71 (2002)
10.Chung, Y.S., Park, S.B., Kang, D.W.Magnetically separable titania-coated nickel ferrite photocatalyst. Mater. Chem. Phys. 86, 375 (2004)
11.Fu, W., Yang, H., Chang, L., Li, M., Bal, H., Yu, Q., Zou, G.Preparation and characteristics of core–shell structure nickel/silica nanoparticles. Colloids Surf., A 262, 71 (2005)
12.Sakiyama, K., Koga, K., Seto, T., Hirasawa, M., Orii, T.Formation of size-selected Ni/NiO core-shell particles by pulsed laser ablation. J. Phys. Chem. B 108, 523 (2004)
13.Yu, D., An, J.Titanium dioxide core/polymer shell hybrid composite particles prepared by two-step dispersion polymerization. Colloids Surf., A 237, 87 (2004)
14.Liz-Marz’an, L.M., Giersig, M., Mulvaney, P.Synthesis of nanosized gold-silica core-shell particles. Langmuir 12, 4329 (1996)
15.Wang, C., Harrison, A.Preparation of iron particles coated with silica. J. Colloid Interface Sci. 217, 203 (1999)
16.Dong-Sik, B., Kyong-Sop, H., Adair, J.H.Synthesis and microstructure of Pd/SiO2 nanosized particles by reverse micelle and sol-gel processing. J. Mater. Chem. 12, 3117 (2002)
17.Hardikar, V.V., Matijevi’c, E.Coating of nanosize silver particles with silica. J. Colloid Interface Sci. 221, 133 (2000)
18.Gerion, D., Pinaud, F., Williams, S.C., Parak, W.J., Zanchet, D., Weiss, S., Alivisatos, A.P.Synthesis and properties of biocompatible water-soluble silica-coated CdSe/ZnS semiconductor quantum dots. J. Phys. Chem. B 105, 8861 (2001)
19.Liu, C.W., Fu, Y.P., Lin, C.H.Ni–Cu–Zn ferrite powder prepared from steel pickling liquor and waste solutions of electroplating. Jpn. J. Appl. Phys. 46, 1006 (2007)
20.Fu, Y.P.Characterization of Ni–Cu–Zn ferrite prepared from steel pickling liquor and waste solutions of electroplating. J. Am. Ceram. Soc. 89, (11)3547 (2006)
21.Chen, J., Lin, S., Yan, G., Yang, L., Chen, X.Preparation and its photocatalysis of Cd1−xZnxS nano-sized solid solution with PAMAM as a template. Catal. Commun. 9, 65 (2008)
22.Yashima, M., Arashi, H., Kakihana, M., Yoshimura, M.Raman scattering study of cubic–tetragonal phase transition in Zr1−xCexO2 solid solution. J. Am. Ceram. Soc. 77, 1067 (1994)
23.Hou, Y., Zhuang, D., Zhang, G., Fang, L., Wu, M.Variables influencing photocatalytic performance of titania film for degradation of methylene blue. Chin. J. Catal. 25, 96 (2004)
24.Luo, L., Cooper, A.T., Fan, M.Preparation and application of nanoglued binary titania-silica aerogel. J. Hazard. Mater. 161, 175 (2009)
25.Tang, W.Z., An, H.UV/TiO2 photocatalytic oxidation of commercial dyes in aqueous solutions. Chemosphere 31, (9)4157 (1995)
26.Chen, P.H., Jenq, C.H.Kinetics of photocatalytic oxidation of trace organic compounds over titanium dioxide. Environ. Int. 24, (8)871 (1998)
27.Hong, C.S., Wang, Y., Bush, B.Kinetics and products of the TiO2, photocatalytic degradation of 2-chlorobiphenyl in water. Chemosphere 36, (7)1653 (1998)
28.Qourzal, S., Tamimi, M., Assabbane, A., Ait-Ichou, Y.Photocatalytic degradation and adsorption of 2-naphthol on suspended TiO2 surface in a dynamic reactor. J. Colloid Interface Sci. 286, 621 (2005)

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