期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 9, 期 5, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2021.105962
关键词
Fe3+; O-HBA AuNPs; Colorimetric detection; Ortho-hydroxybenzoic acid
资金
- Ministry of Research and Higher Education of the Republic of Indonesia
- Master Education Program Leading to Doctoral Degree for Excellent Graduates (PMDSU) [1511/E4.4/2015]
A fast and selective colorimetric sensor for detecting Fe3+ was developed using gold nanoparticles capped with ortho-hydroxybenzoic acid (o-HBA AuNPs), showing good precision and accuracy in detecting Fe3+ in different water samples.
A fast and selective colorimetric sensor for detecting Fe3+ was developed using gold nanoparticles capped with ortho-hydroxybenzoic acid (o-HBA AuNPs). This sensor was characterized using UV-Vis spectroscopy, FTIR spectroscopy, XRD, and TEM. The absorbance of surface plasmon resonance (SPR) at 534 nm increased after the addition of Fe3+. It was confirmed by FTIR, XRD, and TEM data indicating that Fe3+ acted as a bridge among the capping agents of AuNPs. The bridges blocked AuNPs from aggregation and caused an increase in the uniformity distribution of o-HBA AuNPs. Under the optimized condition, this sensor had a good calibration curve linearity at 534 nm. The value of R-2 obtained was 0.9994 with LoD of 9.19 mu M and LoQ of 30.57 mu M. This sensor exhibited good precision and accuracy for Fe3+ detection in rice field, river, and sea waters and has been successfully used to detect Fe3+ in the real water samples collected from various locations of Code River, Yogyakarta, Indonesia.
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