A Sustainable Approach to Amoxicillin Removal: Eco-Conscious Synthesis and Characterization of Bi-Functionalized Hollow Silica Sphere as High-Performance Adsorbent and Its Adsorption Mechanisms

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2025-03-29 DOI:10.1016/j.surfin.2025.106305

Sameer Alshehri , Soroosh Soltani , Niloofar Pirestani , Roozbeh Soltani , Saeed Shirazian

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引用次数: 0

Abstract

In this study, we report the synthesis of an eco-friendly, high-performance adsorbent, aminoethylaminethyl-phenethyl-trimethoxysilane (AEAMPTMS)-functionalized hollow silica spheres, for effective amoxicillin removal from water. Utilizing Carex Riparia (sedge) as a green silica source, the synthesis minimizes hazardous chemicals, offering a scalable and sustainable approach. Amino/phenyl nanoporous hollow silica sphere (AP-NHSS) exhibits a high surface area (653 m² g^–1) and a bimodal micro-mesoporous structure, enhancing adsorption through electrostatic interactions, hydrogen bonding, and π-π stacking. Thermodynamic analysis reveals an exothermic adsorption process (ΔrH^∘_ads.=−38.13 kJ mol⁻¹) with spontaneous Gibbs free energy values (ΔrG^∘_ads.=−30.22 to −29.68 kJ mol⁻¹), indicating favorable adsorption driven by physisorption with weak chemisorptive contributions. Kinetic studies show that the Langmuir isotherm and pseudo-first-order models best describe the adsorption process, confirming monolayer adsorption and surface-controlled kinetics. AP-NHSS demonstrates a maximum capacity of 384.6 mg g^–1 with a high reusability, retaining 96.4% of its initial adsorption capacity over 10 cycles. These findings highlight AP-NHSS as a promising green adsorbent, aligning with the urgent need for sustainable solutions in modern water treatment.

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)