Eco-engineered functionalized mesoporous silica from rice husks for selective detection of Fe( iii ) in aqueous media
Abstract
)-2-(((2-hydroxyphenyl)imino)methyl)naphthalene-1,6-diol (HMN), were immobilized onto MSP to create the BMN@MSP and HMN@MSP sensing systems. Upon coordination with Fe(iii), both BMN@MSP and HMN@MSP exhibit LMCT related changes in their UV-Vis absorption spectra (primarily intensity changes and, for HMN, more pronounced spectral modulation near ∼300 nm). These spectral changes are recorded with a UV-Vis spectrophotometer and are used to construct calibration curves and to determine the limits of detection and quantification, with HMN@MSP achieving a superior detection limit of 0.19 ppb and remarkable selectivity. Additionally, the sensors showed fast response times (
Fields of Study & Subjects
Mesoporous Materials and Catalysis
Iron oxide chemistry and applications
Arsenic contamination and mitigation
Publication details
- Journal / source
- RSC Advances
- Publisher
- Royal Society of Chemistry (RSC)
- Volume
- 16
- Issue
- 31
- Pages
- 28725–28742
- Publication date
- 1 January 2026
- Language
- EN