Low-cost and sustainable nanosilver decorated on hydroxyapatite from fishbone for effective reduction of organic compounds in aqueous solution

• Published in: Materials Today Sustainability Vol. 25; p. 100688
• Main Authors: Truong, Thi Be Ta, Nguyen, Yen Nhi, Nguyen, Thi Thuy Van, Nguyen, Phung Anh, Nguyen, Thi Thu Thuy, Do, Ba Long, Nguyen Tran, Phuong Nghi, Ha, Huynh Ky Phuong, Ho, Thanh Gia-Thien, Tri, Nguyen
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2024
• Subjects: Hydroxyapatite; Nanosilver; Organic compounds; Reduction; Sustainable catalyst; Reduction; Nanosilver; Hydroxyapatite; Sustainable catalyst; Organic compounds
• ISSN: 2589-2347; 2589-2347
• DOI: 10.1016/j.mtsust.2024.100688

The low-cost and sustainable catalysts synthesised via the green chemistry method for reducing methyl orange (MO) in aqueous solution in the presence of NaBH4 (NB) from effluent have drawn considerable interest in recent years. Herein, bio-inspired silver nanoparticles (AgNPs) were immobilized on a hydroxyapatite (HA) surface produced from salmon bone via a straightforward and novel technique using an aqueous extract derived from the leaves of Jasminum subtriplinerve Blume as a stabilizing and reducing agent. In order to ascertain the composition and structure of the Ag/HA nanocomposites, physicochemical methods were employed, such as X-ray diffraction (XRD) measurements, Fourier transforms infrared (FT-IR) analysis, Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), N2 adsorption–desorption, and high-resolution transmission electron microscopy (HR-TEM). The as-prepared silver nanocatalysts exhibited a spherical morphology, with an average particle size of 4.9 nm, a specific surface area of 10.9 m2/g, a 24.8 Å pore diameter, and a 0.012 cm3/g pore volume. By conducting an examination of the activity of catalysts, the optimum conditions for MO reduction were established using a 0.3Ag/HA sample containing 0.3 % AgNPs on the HA surface, a 0.2 g/L catalyst dosage, and a MO/NB molar ratio to 1/200. After 10 min, the performance achieved an efficiency greater than 95.0 %, with consistent first-order reaction kinetics and the reduction rate constant (k) of 0.1147 min−1. Furthermore, the nanocomposite at the suitable condition exhibited exceptional catalytic efficacy in reducing additional organic dyes, including congo red (CR) and rhodamine B (RB). All these observations demonstrated a novel, environmentally sustainable, and potentially valuable approach to advancing effective catalysts for reducing organic dyes. [Display omitted] •Hydroxyapatite (HA) fabricated from fishbone as an ideal green support for nanocatalyst.•A low-cost and sustainable nano-Ag/HA catalyst synthesised via the green method.•Ag/HA performed outstandingly in the catalytic reduction of organic compounds.