Preparation of Flower-like ZnO Architecture for Photodegradation of Caffeine in Aqueous Solution
Main Article Content
Abstract
The flower-like ZnO architecture was prepared by hydrothermal method. As-synthesized samples were characterized by XRD, SEM, and N₂ adsorption/desorption isotherm. The composition of samples before and after calcination was analyzed by XRD, the precursor was completely transformed to ZnO at 400 °C. The catalytic performance of ZnO was evaluated by the degradation of caffeine in aqueous solution under different irradiation of lights. The degradation efficiency was 97.6 % under UV light in 120 min and it was 100 % under solar light in 60 min. The reaction kinetic of photodegradation of caffeine was studied by first-order kinetic model and the reusability of the ZnO sample was investigated through five cyclic tests.
Keywords
CuO/MgO, Removal, Tartrazine, Photocatalyst, Composite
Article Details
References
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[3] B. Czech, M. Hojamberdiev, UVA- and visible-light-driven photocatalytic activity of three-layer perovskite Dion-Jacobson phase CsBa2M3O10 (M=Ta, Nb) and oxynitride crystals in the removal of caffeine from model wastewater, Journal of Photochemistry and Photobiology A: Chemistry 324 (2016) 70-80.
[4] V.t.p.a.e.p. centre, Report on coffee sector in Vietnam, 2007.
[5] L. Busse, Detection of Caffeine in the Streams and Rivers within the San Diego Region, Environmental Scientist Healthy Waters Branch, 2375 Northside Drive, Suite 100, San Diego, California 92108, 2015.
[6] W. Fang, M. Xing, J. Zhang, Modifications on reduced titanium dioxide photocatalysts: A review, Journal of Photochemistry and Photobiology C: Photochemistry Reviews 32 (2017) 21-39.
[7] L.N.B. Almeida, G.G. Lenzi, J.M.T.A. Pietrobelli, O.A.A.d. Santos, Performance Evaluation of Catalysts of ZnO in Photocatalytic Degradation of Caffeine Solution, Chemical Engineering Transactions 57 (2017) 6.
[8] C.B. Ong, L.Y. Ng, A.W. Mohammad, A review of ZnO nanoparticles as solar photocatalysts: Synthesis, mechanisms and applications, Renewable and Sustainable Energy Reviews 81 (2018) 536-551.
[9] H. Zhou, H. Zhang, Y. Wang, Y. Miao, L. Gu, Z. Jiao, Self-assembly and template-free synthesis of ZnO hierarchical nanostructures and their photocatalytic properties, Journal of Colloid and Interface Science 448 (2015) 367-373.
[10] J.N. Hasnidawati, H.N. Azlina, H. Norita, N.N. Bonnia, S. Ratim, E.S. Ali, Synthesis of ZnO Nanostructures Using Sol-Gel Method, Procedia Chemistry 19 (2016) 211-216.
[11] B. Li, Y. Wang, Facile Synthesis and Enhanced Photocatalytic Performance of Flower-like ZnO Hierarchical Microstructures, The Journal of Physical Chemistry C 114 (2010) 890-896.
[12] G.G.L. Lariana, N.B. Almeida, Juliana, M.T.A. Pietrobelli, Onelia A.A. dos Santos, Performance Evaluation of Catalysts of ZnO in Photocatalytic Degradation of Caffeine in Solution, Engineering Transactions 57 (2017).
[13] P. Ramasamy, J. Kim, Facile and fast synthesis of flower-like ZnO nanostructures, Materials Letters 93 (2013) 52-55.
[14] S. Ameen, M. Shaheer Akhtar, H. Shik Shin, Speedy photocatalytic degradation of bromophenol dye over ZnO nanoflowers, Materials Letters 209 (2017) 150-154.
[15] M.A. Alvi, A.A. Al-Ghamdi, M. ShaheerAkhtar, Synthesis of ZnO nanostructures via low temperature solution process for photocatalytic degradation of rhodamine B dye, Materials Letters 204 (2017) 12-15.
[16] S. Kakarndee, S. Nanan, SDS capped and PVA capped ZnO nanostructures with high photocatalytic performance toward photodegradation of reactive red (RR141) azo dye, Journal of Environmental Chemical Engineering 6 (2018) 74-94.
[17] H.-K. Seo, H.-S. Shin, Study on photocatalytic activity of ZnO nanodisks for the degradation of Rhodamine B dye, Materials Letters 159 (2015) 265-268.
[18] L. Saikia, D. Bhuyan, M. Saikia, B. Malakar, D.K. Dutta, P. Sengupta, Photocatalytic performance of ZnO nanomaterials for self sensitized degradation of malachite green dye under solar light, Applied Catalysis A: General 490 (2015) 42-49.
[19] B. Krishnakumar, M. Swaminathan, Photodegradation of Acid Violet 7 with AgBr–ZnO under highly alkaline conditions, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 99 (2012) 106-165.
[20] K. Selvam, M. Muruganandham, I. MuthuveI, M. Swaminathan, The influence of inorganic oxidants and metal semiconductor sensitized photodegradation of 4-fluorophenol, Chemical Engineering Journal 128 (2007) 51-57.
[21] Q. Wang, T. Li, P. Xie, J. Ma, MgO nanolayering of CuO₂ semiconductors enhances photoactivity: Superoxide radicals boost, Journal of Environmental Chemical Engineering 5 (2017) 2648-2657.
[22] N. Wang, T. Zheng, G. Zhang, P. Wang, A review on Fenton-like processes for organic wastewater treatment, Journal of Environmental Chemical Engineering 4 (2016) 762-787.