Factors Affecting the Reductive Properties of the Core-Shell SiO2-Coated Iron Nanoparticles
- 1 College of Life Science, Northeast Forestry University, Harbin, China
- 2 College of Life Science, Northeast Forestry University, Harbin, China
- 3 College of Life Science, Northeast Forestry University, Harbin, China
- 4 College of Life Science, Northeast Forestry University, Harbin, China
Abstract
In this study, novel core-shell SiO 2 -coated iron nanoparticles (SiO 2 -nZVI) were synthesized using a one-step Stoeber method. The Malachite green degradation abilities of the nanoparticles were investigated. The effects of ethanol/distilled water volume ratio, presence and absence of PEG, tetraethyl orthosilicate (TEOS) dosage, and hydrolysis time used in the nanoparticles preparation process were investigated. The results indicated that the SiO 2 -coated iron nanoparticles had the highest reduction activity when the particles synthesized with ethanol/H 2 O ratio of 2:1, PEG of 0.15 ml, TEOS of 0.5 ml and the reaction time was 4 h. The SiO 2 -nZVI nanoparticles were characterized using Transmission Electron Microscopy (TEM), Energy Dispersive Spectrometry (EDS) and powder X-Ray Diffraction (XRD). The results showed that the average particles diameter of the SiO 2 -nZVI was 20 - 30 nm. The thickness of the outside SiO 2 film is consistent and approximately 10 nm. The results indicated that the nanoparticles coated completely with a transparent SiO 2 -film. Such nanoparticles could have wide applications in dye decolorization.
- Wu, D., Zheng, S., Ding, A., Sun, G. and Yang, M. (2015) Performance of a Zero Valent Iron-Based Anaerobic System in Swine Wastewater Treatment. Journal of Hazardous Materials, 286, 1-6. http://dx.doi.org/10.1016/j.jhazmat.2014.12.029
- Ma, H., Huang, Y., Shen, M., Guo, R., Cao, X. and Shi, X. (2012) Enhanced Dechlorination of Trichloroethylene Using Electrospun Polymer Nanofibrous Mats Immobilized with Iron/ Palladium Bimetallic Nanoparticles. Journal of Hazardous Materials, 211-212, 349-356. http://dx.doi.org/10.1016/j.jhazmat.2011.11.038
- Shi, C., Wei, J., Jin, Y., Kniel, K.E. and Chiu, P.C. (2012) Removal of Viruses and Bacteriophages from Drinking Water Using Zero-Valent Iron. Separation and Purification Technology, 84, 72-78. http://dx.doi.org/10.1016/j.seppur.2011.06.036
- Guan, X., Sun, Y., Qin, H., Li, J., Lo, I.M., He, D. and Dong, H. (2015) The Limitations of Applying Zero-Valent Iron Technology in Contaminants Sequestration and the Corresponding Countermeasures: The Development in Zero-Valent Iron Technology in the Last Two Decades (1994-2014). Water Research, 75, 224-248. http://dx.doi.org/10.1016/j.watres.2015.02.034
- Keenan, C.R. and Sedlak, D.L. (2008) Factors Affecting the Yield of Oxidants from the Reaction of Nanonarticulate Zero-Valent Iron and Oxygen. Environmental Science and Tech nology, 42, 1262-1267. http://dx.doi.org/10.1021/es7025664
- Kim, H., Hong, H.J., Jung, J., Kim, S.H. and Yang, J.W. (2010) Degradation of Trichloroethylene (TCE) by Nanoscale Zero-Valent Iron (nZVI) Immobilized in Alginate Bead. Journal of Hazardous Materials, 176, 1038-1043. http://dx.doi.org/10.1016/j.jhazmat.2009.11.145
- Sakkas, V.A., Islam, M.A., Stalikas, C. and Albanis, T.A. (2010) Photocatalytic Degradation Using Design of Experiments: A Review and Example of the Congo Red Degradation. Journal of Hazardous Materials, 175, 33-44. http://dx.doi.org/10.1016/j.jhazmat.2009.10.050
- Clarke, B.O. and Smith, S.R. (2011) Review of “Emerging” Organic Contaminants in Biosolids and Assessment of International Research Priorities for the Agricultural Use of Biosolids. Environment International, 37, 226-247. http://dx.doi.org/10.1016/j.envint.2010.06.004
- Mueller, N.C., Braun, J., Bruns, J., Cerník, M., Rissing, P., Rickerby, D. and Nowack, B. (2012) Application of Nanoscale Zero Valent Iron (NZVI) for Groundwater Remediation in Europe. Environmental Science and Pollution Research, 19, 550-558. http://dx.doi.org/10.1007/s11356-011-0576-3