Journal of Applied Science and Engineering

Published by Tamkang University Press

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Green Synthesis of Ag–Mg(OH)2 Nanocomposites using Avocado Peel Extract and Study on Catalytic Properties in the Photodegradation of Methylene Blue

 2026

 Volume 34

Diep Tuong Minh Nhat1, Nguyen Anh Duc1, and Ngo Tran Hoang Duong1,2

1Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, Dien Hong
Ward, Ho Chi Minh City, Vietnam

2Vietnam National University Ho Chi Minh City, Linh Xuan Ward, Ho Chi Minh City, Vietnam

Received: August 29, 2025
Accepted: December 10, 2025
Publication Date: August 05, 2026

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XRD patterns of Ag− Mg(OH)2  nanocomposite  synthesized  using  Persea americana peel extract. 

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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The rapid development of Vietnam’s textile dyeing industry has fueled economic growth, yet it has brought to light the issue of organic dye contamination in wastewater, posing environmental and public health concerns. In response, our work introduces an innovative approach to address this challenge: the synthesis of Ag − Mg(OH)2 nanocomposites using avocado peel extract (Perseaamericana) for the efficient removal of organic
dyes from wastewater. This novel method not only yields eco-friendly materials but also optimizes the use of agricultural by-products, aligning with principles of sustainability and green chemistry. By employing advanced analytical techniques, including Ultraviolet-Visible spectrophotometry (UV-Vis), X-ray diffraction (XRD), and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM-EDX), the authors conducted a thorough characterization of the synthesized Ag − Mg(OH)2 nanocomposites. The unique structural composition of the material was revealed, featuring silver nanoparticles (20 to 50 nm in diameter) evenly dispersed on Mg(OH)2 nanorods (250 to 300 nm in length). In addition, the study explored the efficacy of these nanocomposites in the photocatalytic degradation of the cationic organic dye methylene blue (MB). A notably remarkable photodegradation efficiency was observed at 82.8% after 3 hours, with an initial aqueous MB concentration of 20 ppm and a material mass- liquid volume ratio of 8 g/L. The findings of this research are not only scientifically relevant, but also offer tangible solutions for mitigating environmental pollution and improving the quality of life.

Keywords: avocado peel extract, wastewater treatment, methylene blue, photodegradation, Ag−Mg(OH)2 nanocomposites.

  1. [1] V. K. Sharma, R. A. Yngard, and Y. Lin, (2009) “Silver nanoparticles: green synthesis and their antimicrobial activities” Advances in colloid and interface science 145(1-2): 83–96. DOI: 10.1016/j.cis.2008.09.002.
  2. [2] O. Fruhwirth, G. Herzog, I. Hollerer, and A. Rachetti, (1985) “Dissolution and hydration kinetics of MgO” Surface Technology 24(3): 301–317. DOI: 10.1016/0376-4583(85)90080-9.
  3. [3] S. W. Kim, I. Kim, and D. J. Moon, (2013) “Synthesis and characterization of magnesium oxide supported catalysts with a meso-macropore structure” Journal of nanoscience and nanotechnology 13(8): 5750–5753. DOI: 10.1166/jnn.2013.7038.
  4. [4] N. M. Julkapli and S. Bagheri, (2016) “Magnesium oxide as a heterogeneous catalyst support” Reviews in Inorganic Chemistry 36(1): 1–41. DOI: 10.1515/revic-2015-0010.
  5. [5] D. Jin, X. Gu, X. Yu, G. Ding, H. Zhu, and K. Yao, (2008) “Hydrothermal synthesis and characterization of hexagonal Mg(OH)2 nano-flake as a flame retardant” Materials Chemistry and Physics 112(3): 962–965. DOI: 10.1016/j.matchemphys.2008.07.058.
  6. [6] A. A. Pilarska, Ł. Klapiszewski, and T. Jesionowski, (2017) “Recent development in the synthesis, modification and application of Mg(OH)2 and MgO: A review” Powder Technology 319: 373–407. DOI: 10.1016/j.powtec.2017.07.009.
  7. [7] M. Jayapriya, K. Premkumar, M. Arulmozhi, and K. Karthikeyan, (2020) “One-step biological synthesis of cauliflower-like Ag/MgO nanocomposite with antibacterial, anticancer, and catalytic activity towards anthropogenic pollutants” Research on Chemical Intermediates 46(3): 1771–1788. DOI: 10.1007/s11164-019-04062-1.
  8. [8] M. Rajkumar, S. D. Presley, F. Menaa, S. E. I. Elbehairi, M. Y. Alfaifi, A. A. Shati, A. E. Albalawi, N. A. Al-thobaiti, D. Kirubakaran, P. Govindaraj, et al., (2024) “Biosynthesis and biological activities of magnesium hydroxide nanoparticles using Tinospora cordifolia leaf extract” Bioprocess and Biosystems Engineering 47: 2111–2129. DOI: 10.1007/s00449-024-03089-y.
  9. [9] B. Gherbi, S. E. Laouini, S. Meneceur, A. Bouafia, H. Hemmami, M. L. Tedjani, G. Thiripuranathar, A. Barhoum, and F. Menaa, (2022) “Effect of pH value on the bandgap energy and particles size for biosynthesis of ZnO nanoparticles: Efficiency for photocatalytic adsorption of methyl orange” Sustainability 14(18): 11300. DOI: 10.3390/su141811300.
  10. [10] K. Alia, D. Atia, M. L. Tedjani, G. G. Hasan, H. A. Mohammed, S. E. Laouini, M. M. Abdullah, and F. Menaa, (2024) “Characterization optimization of synthesis Chitosanclay/benzoin/Fe3O4 composite for adsorption of Thionine dye by design expert study” Scientific Reports 14(1): 23373. DOI: 10.1038/s41598-024-75016-w.
  11. [11] I. Trujillo-Mayol, C. Céspedes-Acuña, F. L. Silva, and J. Alarcón-Enos, (2019) “Improvement of the polyphenol extraction from avocado peel by assisted ultrasound and microwaves” Journal of Food Process Engineering 42(6): e13197. DOI: 10.1111/jfpe.13197.
  12. [12] D. A. Kumar, V. Palanichamy, and S. M. Roopan, (2014) “Green synthesis of silver nanoparticles using Alternanthera dentata leaf extract at room temperature and their antimicrobial activity” Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 127: 168–171. DOI: 10.1016/j.saa.2014.02.058.
  13. [13] R. Colombo and A. Papetti, (2019) “Avocado (Persea americana Mill.) by-products and their impact: From bioactive compounds to biomass energy and sorbent material for removing contaminants. A review” International Journal of Food Science and Technology 54(4): 943–951. DOI: 10.1111/ijfs.14143.
  14. [14] M. Dahmardnezhad, S. H. Rafsanjani, S. Sabbaghi, N. Baghinia, N. Fooladivanda, E. Peyravi, M.-R. Baghinia, Y. Parsa, H. G. Kolagar, F. Saremi, et al., (2024) “A Novel Persian Herbal Syrups: Preventive and Curative Effects of Syrup Formulation of Achillea. millefolium L. against Ethylene Glycol Induced Urolithiasis in Rats: Novel Persian Herbal Syrups and Urolithiasis” Galen Medical Journal 13: e3317–e3317. DOI: 10.31661/gmj.v13i.3317.
  15. [15] M. Abdolahad, M. Janmaleki, S. Mohajerzadeh, O. Akhavan, and S. Abbasi, (2013) “Polyphenols attached graphene nanosheets for high efficiency NIR mediated photodestruction of cancer cells” Materials Science and Engineering: C 33(3): 1498–1505. DOI: 10.1016/j.msec.2012.12.052.
  16. [16] G. R. Velderrain-Rodríguez, J. Quero, J. Osada, O. Martín-Belloso, and M. J. Rodríguez-Yoldi, (2021) “Phenolic-rich extracts from avocado fruit residues as functional food ingredients with antioxidant and antiproliferative properties” Biomolecules 11(7): 977. DOI: 10.3390/biom11070977.
  17. [17] F. Özbaş, (2024) “Sustainable synthesis of green Cu2O nanoparticles using avocado peel extract as biowaste source” Journal of the Turkish Chemical Society Section A: Chemistry 11(1): 303–312. DOI: 10.18596/jotcsa.1391735.
  18. [18] O. Akhavan and E. Ghaderi, (2010) “Self-accumulated Ag nanoparticles on mesoporous TiO2 thin film with high bactericidal activities” Surface and Coatings Technology 204(21-22): 3676–3683. DOI: 10.1016/j.surfcoat.2010.04.048.
  19. [19] M. A Bhosale and B. M Bhanage, (2015) “Silver nanoparticles: Synthesis, characterization and their application as a sustainable catalyst for organic transformations” Current Organic Chemistry 19(8): 708–727. DOI: 10.2174/1385272819666150207001154.
  20. [20] M. Ramezani Farani, M. Farsadrooh, I. Zare, A. Gholami, and O. Akhavan, (2023) “Green synthesis of magnesium oxide nanoparticles and nanocomposites for photocatalytic antimicrobial, antibiofilm and antifungal applications” Catalysts 13(4): 642. DOI: 10.3390/catal13040642.
  21. [21] B. Uzair, A. Liaqat, H. Iqbal, B. Menaa, A. Razzaq, G. Thiripuranathar, N. Fatima Rana, and F. Menaa, (2020) “Green and cost-effective synthesis of metallic nanoparticles by algae: Safe methods for translational medicine” Bioengineering 7(4): 129. DOI: 10.3390/bioengineering7040129.
  22. [22] J. Zhou, Y. Yang, and Z. Li, (2024) “Efficient and fast arsenate removal from water by in-situ formed magnesium hydroxide” Scientific Reports 14(1): 21232. DOI: 10.1038/s41598-024-72258-6.
  23. [23] N. A. Amro, L. P. Kotra, K. Wadu-Mesthrige, A. Bulychev, S. Mobashery, and G.-y. Liu, (2000) “High-resolution atomic force microscopy studies of the Escherichia coli outer membrane: structural basis for permeability” Langmuir 16(6): 2789–2796. DOI: 10.1021/la991013x.
  24. [24] Y. Zidane, S. E. Laouini, A. Bouafia, S. Meneceur, M. L. Tedjani, S. A. Alshareef, H. A. Almukhlifi, K. Al-Essa, E. M. Al-Essa, M. M. Rahman, et al., (2022) “Green synthesis of multifunctional MgO@AgO/Ag2O nanocomposite for photocatalytic degradation of methylene blue and toluidine blue” Frontiers in Chemistry 10: 1083596. DOI: 10.3389/fchem.2022.1083596.
  25. [25] I. Khan, K. Saeed, I. Zekker, B. Zhang, A. H. Hendi, A. Ahmad, S. Ahmad, N. Zada, H. Ahmad, L. A. Shah, et al., (2022) “Review on methylene blue: its properties, uses, toxicity and photodegradation” Water 14(2): 242. DOI: 10.3390/w14020242.
  26. [26] A. L. Linsebigler, G. Lu, and J. T. Yates Jr, (1995) “Photocatalysis on TiO2 surfaces: principles, mechanisms, and selected results” Chemical reviews 95(3): 735–758. DOI: 10.1021/cr00035a013.
  27. [27] M. Matalkeh, G. K. Nasrallah, F. M. Shurrab, E. S. Al-Absi, W. Mohammed, A. Elzatahry, and K. M. Saoud, (2022) “Visible light photocatalytic activity of Ag/WO3 nanoparticles and its antibacterial activity under ambient light and in the dark” Results in Engineering 13: 100313. DOI: 10.1016/j.rineng.2021.100313.
  28. [28] Z. Qiu, B. Wang, X. Zhou, S. Yang, Q. Gao, X. Cai, S. Zhang, and Y. Fang, (2022) “CdS@ Mg(OH)2 core/shell composite photocatalyst for efficient visible-light photocatalytic overall water splitting” International Journal of Hydrogen Energy 47(14): 8729–8738. DOI: 10.1016/j.ijhydene.2021.12.216.
  29. [29] G. G. Hasan, S. E. Laouini, A. Khelef, H. A. Mohammed, M. Althamthami, S. Meneceur, F. Alharthi, S. A. Alshareef, and F. Menaa, (2024) “Efficient treatment of oily wastewater, antibacterial activity, and photodegradation of organic dyes using biosynthesized Ag@Fe3O4 nanocomposite” Bioprocess and Biosystems Engineering 47(1): 75–90. DOI: 10.1007/s00449-023-02946-6.
  30. [30] F. A. Alharthi, A. A. Alghamdi, N. Al-Zaqri, H. S. Alanazi, A. A. Alsyahi, A. E. Marghany, and N. Ahmad, (2020) “Facile one-pot green synthesis of Ag–ZnO Nanocomposites using potato peeland their Ag concentration dependent photocatalytic properties” Scientific Reports 10(1): 20229. DOI: 10.1038/s41598-020-77426-y.
  31. [31] K. Murugesan, K. Tareke, M. Gezehegn, M. Kebede, A. Yazie, and G. Diyana, (2019) “Rapid development of activated carbon and ZnO nanoparticles via green waste conversion using avocado fruit peel powder and its high performance efficiency in aqueous dye removal application” Journal of Inorganic and Organometallic Polymers and Materials 29(4): 1368–1374. DOI: 10.1007/s10904-019-01101-7.
  32. [32] B. L. Cushing, V. L. Kolesnichenko, and C. J. O’Connor, (2004) “Recent advances in the liquid-phase syntheses of inorganic nanoparticles” Chemical reviews 104(9): 3893–3946. DOI: 10.1021/cr030027b.
  33. [33] N. Khanna and A. R. Kumar, (2018) “Preparation and characterization of MgO nanoparticles by sol–gel method” Advanced Science Letters 24(8): 5708–5711. DOI: 10.1166/asl.2018.12182.
  34. [34] B. Kumar and L. Cumbal, (2016) “UV-Vis, FTIR and antioxidant study of Persea americana (Avocado) leaf and fruit: a comparison”: URL: https://dspace.uceunca.edu.ec/500.
  35. [35] A. López-Cobo, A. M. Gómez-Caravaca, F. Pasini, M. F. Caboni, A. Segura-Carretero, and A. Fernández-Gutiérrez, (2016) “HPLC-DAD-ESI-QTOF-MS and HPLC-FLD-MS as valuable tools for the determination of phenolic and other polar compounds in the edible part and by-products of avocado” Lwt 73: 505–513. DOI: 10.1016/j.lwt.2016.06.049.
  36. [36] R. Das, S. S. Nath, D. Chakdar, G. Gope, and R. Bhattacharjee, (2010) “Synthesis of silver nanoparticles and their optical properties” Journal of Experimental Nanoscience 5(4): 357–362. DOI: 10.1080/17458080903583915.
  37. [37] L. Mahmudin, E. Suharyadi, A. B. S. Utomo, and K. Abraha, (2015) “Optical properties of silver nanoparticles for surface plasmon resonance (SPR)-based biosensor applications” Journal of Modern Physics 6(8): 1071–1076. DOI: 10.4236/jmp.2015.68111.
  38. [38] A. Babapour, O. Akhavan, R. Azimirad, and A. Moshfegh, (2006) “Physical characteristics of heat-treated nano-silvers dispersed in sol–gel silica matrix” Nanotechnology 17(3): 763–771. DOI: 10.1088/0957-4484/17/3/025.
  39. [39] A. Naghizadeh, Z. M. Mizwari, S. M. Ghoreishi, S. Lashgari, S. Mortazavi-Derazkola, and B. Rezaie, (2021) “Biogenic and eco-benign synthesis of silver nanoparticles using jujube core extract and its performance in catalytic and pharmaceutical applications: Removal of industrial contaminants and in-vitro antibacterial and anticancer activities” Environmental Technology & Innovation 23: 101560. DOI: 10.1016/j.eti.2021.101560.
  40. [40] M. Ansari, S. Ahmed, A. Abbasi, M. T. Khan, M. Subhan, N. A. Bukhari, A. A. Hatamleh, and N. R. Abdelsalam, (2023) “Plant mediated fabrication of silver nanoparticles, process optimization, and impact on tomato plant” Scientific Reports 13(1): 18048. DOI: 10.1038/s41598-023-45038-x.
  41. [41] R. T. Downs and M. Hall-Wallace, (2003) “The American Mineralogist crystal structure database” American mineralogist 88(1): 247–250. URL: https://pubs.geoscienceworld.org/msa/ammin/article-pdf/88/1/247/3609817/31_1025downs.pdf.
  42. [42] M. Shah and F. Al-Marzouki, (2011) “A simple and safe method for preparation of Mg(OH)2 nanorods in ambient air” International Journal of Nano Dimension 2(2): 111–116. DOI: 10.7508/ijnd.2011.02.003.
  43. [43] U. Wijesinghe, G. Thiripuranathar, H. Iqbal, and F. Menaa, (2021) “Biomimetic synthesis, characterization, and evaluation of fluorescence resonance energy transfer, photoluminescence, and photocatalytic activity of zinc oxide nanoparticles” Sustainability 13(4): 2004. DOI: 10.3390/su13042004.
  44. [44] B. B. Tewari and C. O. Thornton, (2010) “Use of basic Methylene Blue Dye for specific surface area measurement of metal hexacyanoferrate (II) complexes” Revista de la Sociedad Química del Perú 76(4): 330–335.
  45. [45] N. Ramesh, C. W. Lai, M. R. B. Johan, S. M. Mousavi, I. A. Badruddin, A. Kumar, G. Sharma, and F. Gapsari, (2024) “Progress in photocatalytic degradation of industrial organic dye by utilising the silver doped titanium dioxide nanocomposite” Heliyon 10(24): DOI: 10.1016/j.heliyon.2024.e40998.
  46. [46] R. Farouq, (2022) “Coupling adsorption-photocatalytic degradation of methylene blue and maxilon red” Journal of Fluorescence 32(4): 1381–1388. DOI: 10.1007/s10895-022-02934-1.
  47. [47] H. Hidaka, J. Zhao, E. Pelizzetti, and N. Serpone, (1992) “Photodegradation of surfactants. 8. Comparison of photocatalytic processes between anionic DBS and cationic BDDAC on the titania surface” The Journal of Physical Chemistry 96(5): 2226–2230. DOI: 10.1021/j100184a037.
  48. [48] N. M. Mahmoodi, J. Abdi, M. Oveisi, M. A. Asli, and M. Vossoughi, (2018) “Metal-organic framework (MIL-100 (Fe)): Synthesis, detailed photocatalytic dye degradation ability in colored textile wastewater and recycling” Materials Research Bulletin 100: 357–366. DOI: 10.1016/j.materresbull.2017.12.033.
  49. [49] J.-J. Du, Y.-P. Yuan, J.-X. Sun, F.-M. Peng, X. Jiang, L.-G. Qiu, A.-J. Xie, Y.-H. Shen, and J.-F. Zhu, (2011) “New photocatalysts based on MIL-53 metal–organic frameworks for the decolorization of methylene blue dye” Journal of hazardous materials 190(1-3): 945–951. DOI: 10.1016/j.jhazmat.2011.04.029.
  50. [50] M. H. Ali, M. S. Abdelkarim, and A. D. Al-Afify, (2024) “Characterization and photodegradation of methylene blue dye using bio-synthesized cerium oxide nanoparticles with Spirulina platensis extract” Discover Applied Sciences 6(3): 94. DOI: 10.1007/s42452-024-05736-1.
  51. [51] M. Farooq, S. Shujah, K. Tahir, S. T. Hussain, A. U. Khan, Z. M. Almarhoon, K. F. Alabbosh, A. A. Alanazi, T. M. Althagafi, and M. E. Zaki, (2024) “Phytoassisted synthesis of CuO and Ag–CuO nanocomposite, characterization, chemical sensing of ammonia, degradation of methylene blue” Scientific Reports 14(1): 1618. DOI: 10.1038/s41598-024-51391-2.
  52. [52] G. Liu, M. Mamat, Y. Baikeli, and X. Dong, (2024) “Photocatalytic degradation of methylene blue by TiO2/Nd2O3 composite thin films” Heliyon 10(9): DOI: 10.1016/j.heliyon.2024.e29894.
  53. [53] S. Modi, V. K. Yadav, D. Ali, N. Choudhary, S. Alarifi, D. K. Sahoo, A. Patel, and M. H. Fulekar, (2023) “Photocatalytic degradation of methylene blue from aqueous solutions by using nano-ZnO/kaolin-clay-based nanocomposite” Water 15(22): 3915. DOI: 10.3390/w15223915.
  54. [54] J. Bandara, J. Kiwi, R. Humphry-Baker, and C. Pulgarin, (1996) “Oxidative degradation and fluorescence of a non-biodegradable brightener via titania suspensions: implications for the natural cycle” Journal of Advanced Oxidation Technologies 1(2): 126–137. DOI: 10.1515/jaots-1996-0204.
  55. [55] Y.-M. Long, L.-G. Hu, X.-T. Yan, X.-C. Zhao, Q.-F. Zhou, Y. Cai, and G.-B. Jiang, (2017) “Surface ligand controls silver ion release of nanosilver and its antibacterial activity against Escherichia coli” International journal of nanomedicine: 3193–3206. DOI: 10.2147/IJN.S132327.
  56. [56] W. Yin, M. Liu, Y.-H. Wang, Y. Huang, T.-L. Zhao, Q.-Z. Yao, S.-Q. Fu, and G.-T. Zhou, (2022) “Fe3O4 – Mg(OH)2 nanocomposite as a scavenger for silver nanoparticles: Rational design, facile synthesis, and enhanced performance” Environmental research 212: 113292. DOI: 10.1016/j.envres.2022.113292.