PHOTOCATALYTIC OPTIMIZATION OF MR DYE BY K-ZnO AND ZnO CATALYSTS UNDER VISIBLE IRRADIATION
Abstract
The lucubration on the visible light methyl red (MR) degradation using K-ZnO and undoped ZnO photo catalyst was investigated. The successive formation of K-ZnO was ascertained by several techniques such as scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), and UV-Visible spectrophotometer and solid state UV-Vis band gap energy determination by comparing the Kubelka-Monk equation with Tauc equation and the energy band gap was calculated to be 3.28ev. The influence of reaction variables such as MR concentration, reaction pH, catalyst loadings and temperature have been investigated for both process. The kinetics model was developed for both doped and undoped ZnO photocatalyst using pseudo first and second order kinetics, the result indicated that both doped and undoped ZnO followed pseudo first order kinetics due to higher correlation coefficient (R2) value of 0.985 and 0.922 with rate constant (k) of 0.026 min-1 and 0.062 min-1, respectively. Based on the rate constant value (k) obtained at different reaction temperatures, the Arrhenius expression was derived. The derived activation energy (Ea) for the degradation of MR by K-ZnO photocatalysis was 32.109x103JK-1. The optimum condition for K-ZnO showed nearly complete degradation (95%) of the dye molecules with slightly higher degradation efficiency compares to ZnO (91%).
References
Ahmadi, S., Mohammadi, L., Igwegbe, C. A., Rahdar, S., & Banach, A. M. (2018). Application of response surface methodology in the degradation of Reactive Blue 19 using H2O2/MgO nanoparticles advanced oxidation process. International Journal of Industrial Chemistry, 9(3), 241–253. https://doi.org/10.1007/s40090-018-0153-4.
Alvi, M. A., Al-Ghamdi, A. A., &ShaheerAkhtar, M. (2017). Synthesis of ZnO nanostructures via low temperature solution process for photocatalytic degradation of rhodamine B dye. Materials Letters, 204, 12–15. https://doi.org/10.1016/j.matlet.2017.06.005.
Basavarajappa, P. S., Patil, S. B., Ganganagappa, N., Reddy, K. R., Raghu, A. V., & Reddy, C. V.(2020). Recent progress in metal-doped TiO2, non-metal doped/codoped TiO2 and TiO2 nanostructured hybrids for enhanced photocatalysis. International Journal of Hydrogen Energy, 45(13), 7764–7778. https://doi.org/10.1016/j.ijhydene.2019.07.241.
Bechambi, O., Sayadi, S., & Najjar, W. (2015). Photocatalytic degradation of bisphenol A in the presence of C-doped ZnO: Effect of operational parameters and photodegradation mechanism. Journal of Industrial and Engineering Chemistry, 32, 201–210. https://doi.org/10.1016/j.jiec.2015.08.017.
Cheng, X., Li, L., Jia, L., Cai, H., Wang, X., Ding, Y., & Fan, X. (2019). Preparation of K+ doped ZnO nanorods with enhanced photocatalytic performance under visible light. Journal of Physics D: Applied Physics, 53(3), 035301. https://doi.org/10.1088/1361-6463/ab4c17.
Chen, L. C., Huang, C. M., & Tsai, F. R. (2007). Characterization and photocatalytic activity of K+doped TiO2 photocatalysts. Journal of Molecular Catalysis A: Chemical, 265(1–2), 133–140. https://doi.org/10.1016/j.molcata.2006.10.011.
Chithambararaj, A., Sanjini, N. S., Velmathi, S., & Chandra Bose, A. (2013). Preparation of h-MoO3 and α-MoO3 nanocrystals: Comparative study on photocatalytic degradation of methylene blue under visible light irradiation. Physical Chemistry Chemical Physics, 15(35), 14761–14769. https://doi.org/10.1039/c3cp51796a.
Das, A., & Mishra, S. (2017). Removal of textile dye reactive green-19 using bacterial consortium: Process optimization using response surface methodology and kinetics study. Journal of Environmental Chemical Engineering, 5(1), 612–627. https://doi.org/10.1016/j.jece.2016.10.005.
Egea-Corbacho, A., Gutiérrez, S., & Quiroga, J. M. (2019). Removal of emerging contaminants from wastewater through pilot plants using intermittent sand/coke filters for its subsequent reuse.Science of the Total Environment, 646, 1232–1240. https://doi.org/10.1016/j.scitotenv.2018.07.399
Gaya, U. I. (2011). Comparative analysis of ZnO-catalyzed photo-oxidation of p-chlorophenols. Europian Journal of Chemistry 2(2), 163–168. https://doi.org/10.5155/eurjchem.2.2.163.
Gaya, U. I., Abdullah, A. H., Zainal, Z., & Hussein, M. Z. (2009). Photocatalytic treatment of 4chlorophenol in aqueous ZnO suspensions: Intermediates, influence of dosage and inorganic anions. Journal of Hazardous Materials, 168(1), 57–63. https://doi.org/10.1016/j.jhazmat.2009.01.130.
Ibrahim, Y., & Gaya, U. I. (2020). Comparative optimization of removal of low levels of Brilliant Green by ZnO photocatalysis and photo-Fenton. J. Mater.Environ. Sci., 2020 11(2) 318-332, 11(2), 318–332. http://www.jmaterenvironsci.com.
Jia, Z., Miao, J., Lu, H. B., Habibi, D., Zhang, W. C., & Zhang, L. C. (2016). Photocatalytic degradation and absorption kinetics of cibacron brilliant yellow 3G-P by nanosized ZnO catalyst under simulated solar light. Journal of the Taiwan Institute of Chemical Engineers, 60(June 2018), 267–274. https://doi.org/10.1016/j.jtice.2015.10.012.
Jiang, M., Ye, K., Deng, J., Lin, J., Ye, W., Zhao, S., & Van Der Bruggen, B. (2018). Conventional Ultrafiltration As Effective Strategy for Dye/Salt Fractionation in Textile Wastewater Treatment. Environmental Science and Technology, 52(18), 10698–10708. https://doi.org/10.1021/acs.est.8b02984.
Liu, B., Lin, L., Yu, D., Sun, J., Zhu, Z., Gao, P., & Wang, W. (2018). Construction of fiber-based BiVO4/SiO2/reduced graphene oxide (RGO) with efficient visible light photocatalytic activity. Cellulose, 25(2), 1089–1101. https://doi.org/10.1007/s10570-017-1628-8
Omotunde, O. I., Okoronkwo, A. E., Aiyesanmi, A. F., &Gurgur, E. (2018). Photocatalytic behavior of mixed oxide NiO/PdO nanoparticles toward degradation of methyl red in water. Journal of Photochemistry and Photobiology A: Chemistry, 365(August), 145–150. https://doi.org/10.1016/j.jphotochem.2018.08.005.
Prince Richard, J., KartharinalPunithavathy, I., Johnson Jeyakumar, S., Jothibas, M., & Praveen, P. (2017). Effect of morphology in the photocatalytic degradation of methyl violet dye using ZnO nanorods. Journal of Materials Science: Materials in Electronics, 28(5), 4025–4034. https://doi.org/10.1007/s10854-016-6016-x.
Tominaga, F. K., Dos Santos Batista, A. P., Silva Costa Teixeira, A. C., &Borrely, S. I. (2018). Degradation of diclofenac by electron beam irradiaton: Toxicitiy removal, by-products identification and effect of another pharmaceutical compound. Journal of Environmental Chemical Engineering, 6(4), 4605–4611. https://doi.org/10.1016/j.jece.2018.06.065.
Wang, Y., Jiang, F., Chen, J., Sun, X., Xian, T., & Yang, H. (2020). In situ construction of CNT/cus hybrids and their application in photodegradation for removing organic dyes. Nanomaterials, 10(1). https://doi.org/10.3390/nano10010178
Yu, C., Tong, Z., Li, S., & Yin, Y. (2019). Enhancing the photocatalytic activity of ZnO by using tourmaline. Materials Letters, 240, 161–164.https://doi.org/10.1016/j.matlet.2018.12.109.
Zaheer, Z., AL-Asfar, A., &Aazam, E. S. (2019). Adsorption of methyl red on biogenic Ag@Fe nanocomposite adsorbent: Isotherms, kinetics and mechanisms. Journal of Molecular Liquids, 283(March), 287–298. https://doi.org/10.1016/j.molliq.2019.03.030.
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