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Manuscript ID : JEST-1803-4206 (R2) Visit : 109 Page: 281 - 294

10.22034/jest.2019.35001.4206

Article Type: Original Research

Antimicrobial and Photocatalytic Properties of Bentonite/Titanium Dioxide Nanocomposites Doped with Silver

Subject Areas : Environment Pullotion (water and wastewater)

mahsa Madadi 1 ( M.Sc., Chemical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran )
Mohammad Ghorbanpour 2 ( Associated Professor of of Chemical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran*(Corresponding Author( )

Received: 2018-03-14 Accepted : 2019-06-26 Published : 2020-10-22

Keywords: bentonite, silver, Doping, Titanium dioxide, nanocomposites,

Abstract :

Background and Objective: One of the main applications of titanium dioxide nanoparticles is killing the microorganisms spatially in drinking water and wastewater treatment. Method:  Pure bentonite/Titanium Dioxide nanocomposites and doped with 3, 5 and 10% w/w silver were prepared by molten salt method. In this study, the antibacterial activity of silver doped titanium dioxide/bentonite nanocomposites was studied against two important microorganisms in food industry i.e. Escherichia coli and Staphylococcus aureusunder visible or UV radiation. The photocatalytic activity of these composites against methyl orange was also investigated. The prepared nanocomposites were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDX), UV-Vis diffusive reflectance spectrometer (UV-Vis DRS). Findings: The scanning electron microscope was showed, that agglomeration of spherical TiO2 nanoparticles formed on the bentonite surface. The XRD pattern revealed that all of the samples have only an anatase phase with crystalline size less than 50 nm. According to EDX analysis, the silver ions successfully doped to the TiO2 nanoparticles. According to UV-Vis DRS results, increasing amounts of doped Ag content in the silver-doped titanium dioxide results in a higher visible absorbance capability of the materials. Parent bentonite did not show antibacterial activity. Titanium dioxide/bentonite nanocomposites showed very weak antibacterial activity. The results showed that the antibacterial ability was significantly improved by doping silver content comparing with pure TiO2/bentonite nanocomposites. This study also showed that Gram-positive bacteria (S. aureus) were more readily disinfected by the photo catalysts than a Gram-negative bacterium (E. coli). According to photocatalytic activity findings, doping of nanocomposites with 5 % silver ions showed maximum photocatalytic activity. This is attributed to the increasing visible absorption capacity due to the presence of silver ions. Discussion and Conclusion: Antibacterial and photocatalytic activity of titanium dioxide/bentonite nanocomposites increases dramatically due to the addition of silver ions. This can be attributed to the release of silver ions from nanocomposites and the increase in the production of free radicals as a result of increased photocatalytic activity due to reducing the energy gap of titanium dioxide nanoparticles in nanocomposites.

References:


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    4.
  4. Ghorbanpour, M., Moghimi, M., Lotfiman, S., 2017. Silica-Supported Copper Oxide Nanoleaf with Antimicrobial Activity Against Escherichia Col. Journal of Water and Environmental Nanotechnology, vol. 2(2), pp. 112-117.
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  10. Sun, Z., Chen, Y., Ke, Q., Yang, Y., Yuan, J., 2002. Photocatalytic degradation of a cationic azo dye by TiO2/bentonite nanocomposite. Journal of Photochemistry and Photobiology A: Chemistry, vol. 149(1), pp. 169-174.
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  11. Reddy, M.V., Jose, R., Teng, T.H., Chowdari, B.V.R., Ramakrishna., 2010. Preparation and electrochemical studies of electrospun TiO2 nanofibers and molten salt method nanoparticles. Electrochimica Acta, vol. 55(9), pp.3109-3117.
    12.
  12. Chen, Y., Wang, K., Lou, L., 2004. Photodegradation of dye pollutants on silica gel  supported TiO2 particles under visible light irradiation. Journal of Photochemistry and Photobiology A: Chemistry, vol. 16(1), pp. 281-287.
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  13. K. Insoo et al., 2006. Method for Synthesizing Nano-Sized Titanium Dioxide Particles. Etro. Sci.
    14.
  14. López-Muñoz M-J, G.R., Aguado J, Marugán J., 2005. Role of the support on the activity of silica-supported TiO2 photocatalysts: Structure of the TiO2/SBA-15 photocatalysts. Catalysis Today, vol. 101, pp. 307-321.
    15.
  15. Cheng Chen, C., Wang, Z., Ruan, S., Zou, B., Zhao, M., Wu, F., 2008. Photocatalytic degradation of C.I. Acid Orange 52 in the presence of Zn-doped TiO2 prepared by a stearic acid gel method. Dyes and Pigments, vol. 77, pp. 204-209.
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  18. Mesgari, Z., Gharagozlou, M., Khosravi, A., Gharanjig, K., 2012. Spectrophotometric studies of visible light induced photocatalytic degradation of methyl orange using phthalocyanine-modified Fe-doped TiO2 nanocrystals. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 92, pp. 148-153.
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  20. Girginov, C., Stefchev, P., Vitanov, P., Dikov, H., 2012. Silver Doped TiO2 Photocatalyst for Methyl Orange Degradation. Engineering Science and Technology  Review, vol. 5(4), pp. 14-17.
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  22. Thanh Binh Nguyen, Moon-Jin Hwang, Kwang-Sun Ryu., 2012. Synthesis and High Photocatalytic Activity of Zn-doped TiO2 Nanoparticles by Sol-gel and Ammonia Evaporation Method , Bull. Korean Chem. Soc, vol. 33, pp. 243-247.
    23.

 

 

 
 

 
 

 
 

 
 

 

 

 
 

 
 

 
 

 
 

 

 

 

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    1. Ghorbanpour, M., Lotfiman, S., 2016. Solid-state immobilisation of titanium dioxide  nanoparticles onto nanoclay. Micro & Nano Letters, vol. 11, pp. 684-687.
      2.
    2. Daghrir, R., Drogui, P., Robert, D., 2013. Modified TiO2 for environmental photocatalytic applications: a review. Industrial & Engineering Chemistry Research, vol. 52(10), pp. 3581-3599.
      3.
    3. Ghorbanpour, M.,Yousofi, M., Lotfiman, S., 2017b. Photocatalytic Decolorization of  Methyl Orange by Silica-Supported TiO2 Composites. Journal of Ultrafine Grained and Nanostructured Materials, vol. 50(1), pp. 43-50.
      4.
    4. Madadi, M., Ghorbanpour, M., and Feizi, A., 2019. Preparation and characterization of solar light-induced rutile Cu-doped TiO2 photocatalyst by solid-state molten salt method. Desalination and Water Treatment, vol. 145, pp. 257-261.
      5.
    5. Wang, Y., Yang, H. and Xue, X., 2014. Synergistic antibacterial activity of TiO2 co-doped with zinc and yttrium. Vacuum, vol. 10, pp. 28-32.
      6.
    6. Mogyorosi, K., Dekany, I. and Fendler, J.H., 2003. Preparation and characterization  of clay mineral intercalated titanium dioxide nanoparticles. Langmuir, vol. 19(7), pp.  2938-2946.
      7.

    7. Zaleska, A., 2008. Doped-TiO2: a review. Recent Patents on Engineering, vol. 2(3),  pp. 157-164.

    8. Thiruvenkatachari, R., Vigneswaran, S. and Moon, I.S., 2008. A review on UV/TiO2  photocatalytic oxidation process. Korean Journal of Chemical Engineering, vol. 25(1), pp. 64-72.

    1. Payami, R., Ghorbanpour, M., Jadid, A.P., 2016. Antibacterial silver-doped bioactive  silica gel production using molten salt method. Journal of Nanostructure in Chemistry, vol. 6(3), pp. 215-221.
      2.
    2. Wang, X., Hou, X., Luan, W., Li, D., Yao, K (2012). The antibacterial and hydrophilic properties of silver-doped TiO2 thin films using sol–gel method. Applied Surface Science, vol 258, pp. 8241-8246.
      3.
    3. Ghorbanpour, M., Mazloumi, M. and Nouri, A., 2017. Silver-Doped Nanoclay with Antibacterial Activity. Journal of Ultrafine Grained and Nanostructured Materials, vol 50(2), pp.124-131.
      4.
    4. Ghorbanpour, M., Moghimi, M., Lotfiman, S., 2017. Silica-Supported Copper Oxide Nanoleaf with Antimicrobial Activity Against Escherichia Col. Journal of Water and Environmental Nanotechnology, vol. 2(2), pp. 112-117.
      5.
    5. Garshasbi, N., Ghorbanpour, M., Nouri, A., and Lotfiman, S. 2017. Preparation of Zinc Oxide-Nanoclay Hybrids by Alkaline Ion Exchange Method. Brazilian Journal of Chemical Engineering, vol. 34(4), pp. 1055-1063.
      6.
    6. Ghorbanpour, M., Hakimi, B., and Feizi, A. 2018. A Comparative Study of Photocatalytic Activity of ZnO/activated Carbon Nanocomposites Prepared by Solid-state and Conventional Precipitation Methods. Journal of Nanostructures, vol. 8(3), pp. 259-265.
      7.
    7. Ghorbanpour, M. 2018. Soybean Oil Bleaching by Adsorption onto Bentonite/Iron Oxide Nanocomposites. Journal of Physical Science, vol 29(2), pp. 113-119.
      8.
    8. Devi, R.R., Gogoi, K., Konwar, B.K., Maji, T.K., 2013. Synergistic effect of nanoTiO2 and nanoclay on mechanical, flame retardancy, UV stability, and antibacterial properties of wood polymer composites. Polymer bulletin, vol. 70(4), pp. 1397-1413.
      9.
    9. Rossetto, E., Petkowicz, D.I., dos Santos, J.H., Pergher, S.B. and Penha, F.G., 2010. Bentonites impregnated with TiO2 for photodegradation of methylene blue. Applied Clay Science, vol. 48(4), pp. 602-606.
      10.
    10. Sun, Z., Chen, Y., Ke, Q., Yang, Y., Yuan, J., 2002. Photocatalytic degradation of a cationic azo dye by TiO2/bentonite nanocomposite. Journal of Photochemistry and Photobiology A: Chemistry, vol. 149(1), pp. 169-174.
      11.
    11. Reddy, M.V., Jose, R., Teng, T.H., Chowdari, B.V.R., Ramakrishna., 2010. Preparation and electrochemical studies of electrospun TiO2 nanofibers and molten salt method nanoparticles. Electrochimica Acta, vol. 55(9), pp.3109-3117.
      12.
    12. Chen, Y., Wang, K., Lou, L., 2004. Photodegradation of dye pollutants on silica gel  supported TiO2 particles under visible light irradiation. Journal of Photochemistry and Photobiology A: Chemistry, vol. 16(1), pp. 281-287.
      13.
    13. K. Insoo et al., 2006. Method for Synthesizing Nano-Sized Titanium Dioxide Particles. Etro. Sci.
      14.
    14. López-Muñoz M-J, G.R., Aguado J, Marugán J., 2005. Role of the support on the activity of silica-supported TiO2 photocatalysts: Structure of the TiO2/SBA-15 photocatalysts. Catalysis Today, vol. 101, pp. 307-321.
      15.
    15. Cheng Chen, C., Wang, Z., Ruan, S., Zou, B., Zhao, M., Wu, F., 2008. Photocatalytic degradation of C.I. Acid Orange 52 in the presence of Zn-doped TiO2 prepared by a stearic acid gel method. Dyes and Pigments, vol. 77, pp. 204-209.
      16.
    16. Zhang, X., Zhou, G., Zhang, H., Wu, C., Song, H., 2011. Characterization and activity of visible light–driven TiO2 photocatalysts co-doped with nitrogen and lanthanum. Transition Met Chem, vol. 36, pp. 217-222.
      17.
    17. Ping Ji, P. L., Kong, X. Z., Wang, J. G., Zhu, X. L., 2012. Characterization and photocatalytic properties of silver and silver chloride doped TiO2 hollow nanoparticles. Chinese Chemical Letters, vol. 23, pp. 1399-1402.
      18.
    18. Mesgari, Z., Gharagozlou, M., Khosravi, A., Gharanjig, K., 2012. Spectrophotometric studies of visible light induced photocatalytic degradation of methyl orange using phthalocyanine-modified Fe-doped TiO2 nanocrystals. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, vol. 92, pp. 148-153.
      19.
    19. Xi-jia YANG, Shu WANG, Hai-ming SUN, Xiao-bing WANG, Jian-she LIAN., 2015. Preparation and photocatalytic performance of Cu-doped TiO2 nanoparticles, Trans. Nonferrous Met. Soc. China, vol. 25, pp. 504-509.
      20.
    20. Girginov, C., Stefchev, P., Vitanov, P., Dikov, H., 2012. Silver Doped TiO2 Photocatalyst for Methyl Orange Degradation. Engineering Science and Technology  Review, vol. 5(4), pp. 14-17.
      21.
    21. Yang Wang, Wubiao Duan, Bo Liu, Xidong Chen, Feihua Yang, Jianping Guo., 2014. The Effects of Doping Copper and Mesoporous Structure on Photocatalytic Properties of TiO2, Journal of Nanomaterials. doi.org/10.1155/2014/178152.
      22.
    22. Thanh Binh Nguyen, Moon-Jin Hwang, Kwang-Sun Ryu., 2012. Synthesis and High Photocatalytic Activity of Zn-doped TiO2 Nanoparticles by Sol-gel and Ammonia Evaporation Method , Bull. Korean Chem. Soc, vol. 33, pp. 243-247.
      23.

     

     



     


     


     


     


     

     


 

 
 

 
 

 
 

 
 

 

 

 

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