Perbandingan Efektivitas Dekolorisasi Fotokatalitik Metilen Biru dan Metil Jingga menggunakan Semikonduktor ZnO pada Variasi pH

Annisa M. Dewi, Wahyu B. Widayatno, Yuly Kusumawati


The comparison of photocatalytic decolorization of Methylene Blue and Methyl Orange using ZnO Semiconductor under UV-LED radiation has been studied at varied pH. ZnO have been synthesized using co-precipitation method. The Scanning Electron Microscopy (SEM) result showed that the synthesized ZnO has a hexagonal structure with the particle size range 0.125 to 0.5 µm. The BET isotherm characterization showed the synthesized ZnO has a specific surface area (SBET), mesoporous volume and micropore volume of 60.20 m2/g, 0.541 cm3/g and 0.02 cm3/g, respectively. The observation of the effect of pH to the photocatalytic activity showed that the highest removal percentage occurred at pH 9 with the value of 95.64% for methylene blue and occurred at pH 3 with the value of 6.236% for methyl orange. 


Photocatalytic; ZnO; pH; Methylene blue; Methyl Orange

Full Text:



Babalola, J. O., Koiki, B. A., Eniayewu, Y., Salimonu, A., Olowoyo, J. O., Oninla, V. O., Alabi, H. A., et al., Adsorption efficacy of Cedrela odorata seed waste for dyes: Non linear fractal kinetics and non linear equilibrium studies. J. Environ. Chem. Eng., 4(3): 3527–3536 (2016).

Mohamed, K. A., Khattab, A. A. & Emam, M. T. H., UV-Mutagenesis in Some White Rot Fungi for Increasing Decolorization of Textile Dyes. 9(11): 5850–5857 (2013).

Komala, P. S., Ananthi, N. & Effendi, A. J., Zat Warna Azo Reaktif Menggunakan Bioreaktor Membran Aerob- Anoksik. 4(4): 87–92 (2008).

Dianggoni, I., Saputra, E. & Pinem, J. A., Pengolahan Zat Warna Tekstil (Rhodamine B) dengan Teknologi AOP (Advance Oxidation Processes) menggunakan Katalis Ce @ Carbon Sphere dan Oksidan Peroxymonosulfate. 1–7 (2011).

Kyzas, G. Z. & Matis, K. A., Nanoadsorbents for pollutants removal: A review. J. Mol. Liq., 203: 159–168 (2015).

Kusumawati, Y., Pauporté, T., Viana, B., Zouzelka, R., Remzova, M. & Rathousky, J., Mesoporous TiO2/Graphene Composite Films for the Photocatalytic Degradation of Eco-Persistent Pollutants. in Proc.SPIE, 10105: (2017).

Dutta, A. K., Maji, S. K. & Adhikary, B., γ-Fe2O3 nanoparticles: An easily recoverable effective photo-catalyst for the degradation of rose bengal and methylene blue dyes in the waste-water treatment plant. Mater. Res. Bull., 49: 28–34 (2014).

Barve, A. K., Gadegone, S. M., Lanjewar, M. R. & Lanjewar, R. B., Synthesis of ZnO Nanomaterial by Precipitation Method and its Characterization. 4: 432–439 (2015).

Sakthivel, S., Neppolian, B., Shankar, M. V., Arabindoo, B., Palanichamy, M. & Murugesan, V., Solar photocatalytic degradation of azo dye: comparison of photocatalytic efficiency of ZnO and TiO2. Sol. Energy Mater. Sol. Cells, 77(1): 65–82 (2003).

Wahab, R., Ansari, S. G., Kim, Y. S., Song, M. & Shin, H.-S., The role of pH variation on the growth of zinc oxide nanostructures. Appl. Surf. Sci., 255(9): 4891–4896 (2009).

Liu, T., Li, Y., Du, Q., Sun, J., Jiao, Y., Yang, G., Wang, Z., et al., Adsorption of methylene blue from aqueous solution by graphene. Colloids Surfaces B Biointerfaces, 90: 197–203 (2012).

Tan, B. & Wu, Y., Dye-Sensitized Solar Cells Based on Anatase TiO2 Nanoparticle/Nanowire Composites. J. Phys. Chem. B, 110(32): 15932–15938 (2006).

Miyawaki, J., Yudasaka, M., Imai, H., Yorimitsu, H., Isobe, H., Nakamura, E. & Iijima, S., In Vivo Magnetic Resonance Imaging of Single-Walled Carbon Nanohorns by Labeling with Magnetite Nanoparticles. Adv. Mater., 18(8): 1010–1014 (2006).

Eljiedi, A. A. A. & Kamari, A., Removal of methyl orange and methylene blue dyes from aqueous solution using lala clam (Orbicularia orbiculata) shell. AIP Conf. Proc., 1847(1): 40003 (2017).

Cheng, M., Zeng, G., Huang, D., Lai, C., Wei, Z., Li, N., Xu, P., et al., Combined biological removal of methylene blue from aqueous solutions using rice straw and Phanerochaete chrysosporium. Appl. Microbiol. Biotechnol., 99(12): 5247–5256 (2015).

Wang, S. & Zhu, Z., Effects of Acidic Treatment of Activated Carbons on Dye Adsorption. Dye. Pigment., 75: 306–314 (2007).

Umpuch, C. & Sakaew, S., Removal of methyl orange from aqueous solutions by adsorption using chitosan intercalated montmorillonite. Songklanakarin J. Sci. Technol., 35: 451–459 (2013).

Kosmulski, M., The pH dependent surface charging and points of zero charge. VII. Update. Adv. Colloid Interface Sci., 251: 115–138 (2018).

Article Metrics

Metrics Loading ...

Metrics powered by PLOS ALM