Selective colorimetric detection of Cr(iii ) and Cr(vi ) using gallic acid capped gold nanoparticles
| العنوان: | Selective colorimetric detection of Cr( |
|---|---|
| المؤلفون: | Chen Dong, Zheyu Shen, Zhuqing Wang, Tianhua Li, Genhua Wu, Aiguo Wu, Yujie Zhang, Wenzhi Ren |
| المصدر: | Dalton Transactions. 45:8347-8354 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Thiosulfate, Chemistry, Metal ions in aqueous solution, Infrared spectroscopy, chemistry.chemical_element, Nanotechnology, Ethylenediaminetetraacetic acid, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Inorganic Chemistry, chemistry.chemical_compound, Chromium, Dynamic light scattering, Colloidal gold, 0210 nano-technology, Selectivity, Nuclear chemistry |
| الوصف: | A colorimetric assay is proposed for the selective detection of Cr(iii) and Cr(vi) via the aggregation-induced color change of gallic acid capped gold nanoparticles (GA-AuNPs). The AuNPs are characterized using UV-vis spectroscopy, transmission electron microscopy (TEM), dynamic light scattering (DLS) and Fourier-transform infrared spectrometry (FT-IR). To detect Cr(iii) and Cr(vi) coexisting in a sample, citrate and thiosulfate were applied to mask Cr(vi) for the detection of Cr(iii), and ethylenediaminetetraacetic acid disodium salt (EDTA) was applied to mask Cr(iii) for the detection of Cr(vi). At optimized experimental conditions, the selectivity of these AuNPs-based detection systems is excellent for Cr(iii) and/or Cr(vi) compared with other types of metal ions. The limit of detections (LODs) of a mixture of Cr(iii) and Cr(vi), Cr(iii) and Cr(vi) by eye vision are 1.5, 1.5 and 2 μM, respectively, and those by UV-vis spectroscopy are 0.05, 0.1 and 0.1 μM, respectively. The minimum detectable concentrations for Cr(iii) or Cr(vi) are all below the guideline value set by the US Environmental Protection Agency (EPA). The applicability of the AuNPs-based colorimetric sensor is also validated by the detection of Cr(iii) and Cr(vi) in electroplating wastewater and real water samples with high recoveries. |
| تدمد: | 1477-9234 1477-9226 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e0bde4a56b7a759300f14c8e375ec1bTest https://doi.org/10.1039/c5dt04099jTest |
| رقم الانضمام: | edsair.doi.dedup.....6e0bde4a56b7a759300f14c8e375ec1b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14779234 14779226 |
|---|