Load of PANI on nano-Fe3O4 and synergy catalytic degradation of dyes
YAN Mei1, ZHANG Qing1, XIE Hui-fang1, KONG Jin-ming, QU Hong-xia1
1. Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
In this study, polyaniline/nano Fe3O4 was synthesized via in situ polymerization of aniline in the presence ofnano Fe3O4 by Hemincatalysis and was used as an efficient heterogeneous Fenton-like catalyst for dyes degradation. The catalytic activity was evaluated by factors in PANI@Fe3O4/H2O2 system, such as initial concentration of dye (Rhodamine B, RhB), concentration of H2O2 and pH. For RhB of 400mg/L, more than 98% removal ratios were obtained from pH 3.75 to 12.0 with 0.5g/L PANI@Fe3O4, 0.04mol/L H2O2, and the utilization efficiency of H2O2 was as high as 80%. The removal ratio of COD could reached 70% for the mixed dyes wastewater with initial COD 1715mg/L in PANI@Fe3O4/H2O2 system. Results showed that PANI@Fe3O4/H2O2 system have some advantagessuch as wide pH range, high catalytic activity, high utilization efficiency of H2O2 and low iron concentration in water. There was a synergy effect between PANI and nano-Fe3O4 in PANI@Fe3O4 composite was observed. The dissolution of Fe3O4 provide Fe2+ and rapid electron transfer from Fe3+ to Fe2+, which play the significant role in the formation of ×OH. PANI provide H+ for the Fenton reaction and prevent leaching of Fe2+/3+ by chelating.
严梅, 张青, 谢慧芳, 孔金明, 曲虹霞. 纳米Fe3O4负载聚苯胺对染料的协同催化降解[J]. 中国环境科学, 2017, 37(4): 1394-1400.
YAN Mei, ZHANG Qing, XIE Hui-fang, KONG Jin-ming, QU Hong-xia. Load of PANI on nano-Fe3O4 and synergy catalytic degradation of dyes. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(4): 1394-1400.
Dutta K, Mukhopadhyay S, Bhattacharjee S, et al. Chemical oxidation of methylene blue using a Fenton-like reaction[J]. Journal of Hazardous Materials, 2001,84(1):57-71.
[2]
Magario I, García Einschlag F S, Rueda E H, et al. Mechanisms of radical generation in the removal of phenol derivatives and pigments using different Fe-based catalytic systems[J]. Journal of Molecular Catalysis A:Chemical, 2012,352(0):1-20.
[3]
Sabhi S, Kiwi J. Degradation of 2,4-dichlorophenol by immobilized iron catalysts[J]. Water research, 2001,35(8):1994- 2002.
[4]
Neamtu M, Yediler A, Siminiceanu I, et al. Oxidation of commercial reactive azo dye aqueous solutions by the photo- Fenton and Fenton-like processes[J]. Journal of Photochemistry and Photobiology A:Chemistry, 2003,161(1):87-93.
[5]
Malik P K. Oxidation of Safranine T in Aqueous Solution Using Fenton's Reagent:Involvement of anFe(III) Chelate in the Catalytic Hydrogen Peroxide Oxidation of Safranine T[J]. Physical Chemistry A, 2004,108:2675-2681.
[6]
Muruganandham M. Decolourisation of Reactive Orange 4by Fenton and photo-Fenton oxidation technology[J]. Dyes and Pigments, 2004,63(3):315-321.
[7]
Lucas M, Peres J. Decolorization of the azo dye Reactive Black 5by Fenton and photo-Fenton oxidation[J]. Dyes and Pigments, 2006,71(3):236-244.
Xu L, Wang J. A heterogeneous Fenton-like system with nanoparticulate zero-valent iron for removal of 4-chloro-3- methyl phenol[J]. Journal of Hazardous Materials, 2011,186(1):256-264.
[13]
Sheng G, Zhang G, Wang J. Photo-Fenton degradation of rhodamine B using Fe2O3-Kaolin as heterogeneous catalyst:Characterization, process optimization and mechanism[J]. Journal of Colloid & Interface Science, 2014,433C(11):1-8.
[14]
Hua Z, Ma W, Bai X, et al. Heterogeneous Fenton degradation of bisphenol A catalyzed by efficient adsorptive Fe3O4/GO nano- composites[J]. Environ Sci Pollut Res Int, 2014,21(12):7737- 7745.
[15]
Wu Y, Passananti M, Brigante M, et al. Fe(III)-EDDS complex in Fenton and photo-Fenton processes:from the radical formation to the degradation of a target compound[J]. Environmental Science & Pollution Research International, 2014,21(21):12154-12162.
[16]
Liu C, Li J, Qi J, et al. Yolk-Shell Fe0@SiO2 Nanoparticles as Nanoreactors for Fenton-like Catalytic Reaction[J]. Acs Applied Materials & Interfaces, 2014,6(15):13167-13173.
[17]
Xu L, Wang J. Magnetic nanoscaled Fe3O4/CeO2 composite as an efficient Fenton-like heterogeneous catalyst for degradation of 4-chlorophenol[J]. Environmental Science & Technology, 2012,46(18):10145-10153.
[18]
Niu H, Zhang D, Zhang S, et al. Humic acid coated Fe3O4 magnetic nanoparticles as highly efficient Fenton-like catalyst for complete mineralization of sulfathiazole[J]. Journal of Hazardous Materials, 2011,190(1-3):559-565.
Gemeay A H, El-Sharkawy R G, Mansour IA, et al. Catalytic activity of polyaniline/MnO2 composites towards the oxidative decolorization of organic dyes[J]. Applied Catalysis B:Environmental, 2008,80(1/2):106-115.
[21]
Feng J Y, Hu X J, Yue P L, et al. Degradation of Azo-dye Orange II by a Photoassisted Fenton Reaction Using a Novel Composite of Iron Oxide and Silicate Nanoparticles as a Catalyst[J]. Industrial & Engineering Chemistry Research, 2003,42(10):2058- 2066.
[22]
Yang C, Du J, Peng Q, et al. Polyaniline/Fe3O4 Nanoparticle Composite:Synthesis and Reaction Mechanism[J]. Phys Chem B, 2009,113(15):5052-5058.
Peller J, Wiest O, Kamat P V. Sonolysis of 2,4- Dichlorophenoxyacetic Acid in Aqueous Solutions. Evidence for ×OH-Radical-Mediated Degradation[J]. Journal of Physical Chemistry A. 2001,105(13):3176-3181.
[25]
Shaktawat V, Saxena N S, Sharma K. Study of the structure and mechanical properties of pure and doped polyaniline[J]. Phase Transitions A Multinational Journal., 2011,84(3):215-224.
[26]
Zhao P. In situ FTIR-attenuated total reflection spectroscopic investigations on the base?acid transitions of polyaniline. Base-acid transition in the emeraldine form of polyaniline[J]. Journal of the Chemical Society Faraday Transactions, 1996, 92(17):3063-3067.
[27]
Kumar P A, Chakraborty S, Ray M. Removal and recovery of chromium from wastewater using short chain polyaniline synthesized on jute fiber[J]. Chemical Engineering Journal, 2008, 141(1):130-140.
[28]
Liu D, Sun D, Li Y. Removal of Cu(II) and Cd(II) From Aqueous Solutions by Polyaniline on Sawdust[J]. Separation Science & Technology, 2011,46(46):321-329.
