Removal of methylene blue from aqueous solution through photocatalysis in the presence of TiO2 nanoparticles under natural sunlight

Authors

DOI:

https://doi.org/10.33448/rsd-v11i6.28881

Keywords:

Photocatalysis; Sunlight; TiO2; Effluent treatment; Environmental education.

Abstract

The present work sought to evaluate the use of natural sunlight in the removal of methylene blue dye from aqueous solutions through heterogeneous photocatalysis using TiO2 (Degussa P25) nanoparticles as a catalyst, since this is a dye widely used industrially. In the study, the influence of catalyst concentration (0; 0.25; 0.5 and 0.75 g/L) and pH (3, 5 and 8) of the solution on the dye removal efficiency after sun exposure was verified for 2 hours under magnetic stirring. For this, absorbance reading was used in a UV-vis spectrophotometer, at pre-established time intervals. It was possible to verify high efficiency of dye removal, reaching values above 90% in all the conditions tested (except in the absence of catalyst and magnetic stirring). In addition, it was possible to observe that both the catalyst concentration and the pH of the solution had an influence on the dye removal efficiency, where, for the analyzed concentrations, it was evidenced that an increase in the concentration from 0.25 to 0.75 g/L resulted in an increase in removal from 91.5% to 99.5% after 2 hours of sun exposure. It was also observed that the reduction of the pH from 8 to 3 resulted in an increase in the dye removal rate, where with pH 3 and 30 min of exposure, more and 90% of removal was achieved. From the results, it appears that photocatalysis using sunlight is an economical and sustainable alternative to reduce environmental pollution caused by this dye.

References

Abdellah, M. H., Nosier, S. A., El-Shazly, A. H. E., Mubarak, A. A. (2018). Photocatalytic decolorization of methylene blue using TiO2/UV system enhanced by air sparging. Alexandria Engineering Journal, 57, 3727–3735.

Alkaim, A. F., Aljeboree, A. M., Alrazaq, N. A., Baqir, S. J., Hussein, F. H. & Lilo, A. J. (2014). Effect of pH on Adsorption and Photocatalytic Degradation Efficiency of Different Catalysts on Removal of Methylene Blue. Asian Journal of Chemistry, 26(24), 8445-8448.

Al-Shamali, S. S. (2013). Photocatalytic Degradation of Methylene Blue in the Presence of TiO2 Catalyst Assisted Solar Radiation. Australian Journal of Basic and Applied Sciences, 7(4), 172-176.

Bharati, B., Sonkar, A. K., Singh, N., Dash, D. E., Rath, C. (2017). Enhanced photocatalytic degradation of dyes under sunlight using biocompatible TiO2 nanoparticles. Materials Research Express, 4. doi.org/10.1088/2053-1591/aa6a36

Borges, M. E., Sierra, M., Cuevas, E., García, R. D. E Esparza, P. (2016). Photocatalysis with solar energy: Sunlight-responsive photocatalyst based on TiO2 loaded on a natural material for wastewater treatment. Solar Energy, 135, 527–535, Jun. 2016.

Brahmia, O. (2016). Photocatalytic Degradation of a Textile Dye under UV and Solar Light Irradiation Using TiO2 and ZnO nanoparticles. Journal of Advances in Chemical Engg., & Biological Sciences (IJACEBS), 3(2), 225-227. doi.org/10.15242/IJACEBS.U1016204

Chong, M. N., Jin, B., Chow, C. W. K. & Saint, C. (2010). Recent developments in photocatalytic water treatment technology: A review. water research, 44, 2997-3027.

Chowdhury, P., Moreira, J., Gomaa, H. & Ray, A. K. (2012). Visible-Solar-Light-Driven Photocatalytic Degradation of Phenol with Dye-Sensitized TiO2: Parametric and Kinetic Study. Industrial & Engineering Chemistry Research, 51, 4523-4532, Mar. 2012.

Higashimoto, S. (2019). Titanium-Dioxide-Based Visible-Light-Sensitive Photocatalysis: Mechanistic Insight and Applications. Catalysts, 9, 201.

Hou, C., Hu, B. & Zhu, J. (2018). Photocatalytic Degradation of Methylene Blue over TiO2 Pretreated with Varying Concentrations of NaOH. Catalysts, 8, 575-588. doi:10.3390/catal8120575.

Jawad, A. H., Abdulhameed, A. S. & Mastuli, M. S. (2020). Acid-factionalized biomass material for methylene blue dye removal: a comprehensive adsorption and mechanism study. Journal of Taibah University for Science, 14(1), 305-313, DOI: 10.1080/16583655.2020.1736767

Koche, J. C. (2011). Fundamentos de metodologia científica: teoria da ciência e iniciação à pesquisa. Petrópolis, RJ : Vozes.

Kusumawardani, C., Sugiyarto, K. H. & Prodjosantoso, A. K. (2021). The Influence of pH on the Nitrogen-doped TiO2 Structure and Its Photocatalytic Activity on Methylene Blue Degradation. Molekul, 16(3), 269 – 279.

Lima da Silva, R. C., Alves Jr, C., Mallak, R. S. C. & Vitoriano, J. O. (2017). Fotocatálise Heterogênea com Luz UV para Tratamento de Água, In: Arminda Saconi Messias; Lilian Costa. (Org.), Rios urbanos limpos: possibilidades e desafios, (pp.914-923), Recife: FASA.

López, R. & Gómez, R. (2012) Band-gap energy estimation from diffuse reflectance measurements on sol-gel and commercial TiO2: A comparative study. Journal of Sol-Gel Science and Technology, 61, 1–7.

Melo, M. M. M. et al. (2016). Aplicação da fotocatálise solar heterogênea em efluente oriundo de indústrias têxteis. In Anais do Congresso Brasileiro de Gestão Ambiental. Campina Grande, PB.

Oliveira, M. M. F. (2013). Radiação ultravioleta/ índice ultravioleta e câncer de pele no brasil: condições ambientais e vulnerabilidades sociais. Revista Brasileira de Climatologia, 13, 60-73.

Reyes-Coronado, D., Rodríguez-Gattorno, G., Espinosa-Pesqueira, M. E., Cab, C., De Coss, R. & Oskam, G. (2008). Phase-pure TiO2 nanoparticles: anatase, brookite and rutile. Nanotechnology, 19, 1-10, doi: 10.1088/0957-4484/19/14/145605.

Sangareswari, M. & Sundaram, M. M. A. (2015). Comparative Study on Photocatalytic Efficiency of TiO2 and BiVO4 Nanomaterial for Degradation of Methylene Blue Dye under Sunlight Irradiation. Journal of Advanced Chemical Sciences, 1(2), 75–77.

Shathy, R.A., Fahim, S.A., Sarker, M., Quddus, M.S., Moniruzzaman, M., Masum, S.M. & Molla, M.A.I. (2022). Natural Sunlight Driven Photocatalytic Removal of Toxic Textile Dyes in Water Using B-Doped ZnO/TiO2 Nanocomposites. Catalysts, 12, 308. https:// doi.org/10.3390/catal12030308.

Silva, E. L., Rocha, E. M. R., Silva, E. S., Porto, C. A. & Medeiros, M. M. (2016). Aplicação do processo de fotocátalise solar homogênea (UV/H2O2) na degradação do corante azul de metileno. In Anais do Congresso Brasileiro de Gestão Ambiental. Campina Grande, PB.

Slav, A. (2011). Optical characterization of TiO2-Ge nanocomposite films obtained by reactive magnetron sputtering. Journal of Nanomaterials and Biostructures, 6, 915–920.

Teixeira, C. P. A. B. & Jardim, W. F. (2004). Processos oxidativos avançados: conceitos teóricos. Caderno temático, 3.

Yao, J. & Wang, C. (2010) Decolorization of Methylene Blue with TiO2 Sol via UV Irradiation Photocatalytic Degradation. International Journal of Photoenergy, 2010, 1-6, doi:10.1155/2010/643182.

Published

07/05/2022

How to Cite

SILVA, R. C. L. da . Removal of methylene blue from aqueous solution through photocatalysis in the presence of TiO2 nanoparticles under natural sunlight . Research, Society and Development, [S. l.], v. 11, n. 6, p. e50311628881, 2022. DOI: 10.33448/rsd-v11i6.28881. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/28881. Acesso em: 28 may. 2022.

Issue

Section

Engineerings