Fluorescent Sensors Based on Organic Polymer-Capped Gold Nanoparticles for the Detection of Cr(VI) in Water
“Turn-off” fluorescent sensors for Cr(VI) have been fabricated based on organic polymer-capped gold nanoparticles. The fluorescence intensity, as well as the response behavior of the sensors, is dependent on the pH values of buffer solution and dilution amounts of the sensors. When diluted 50 times...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | International Journal of Analytical Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2019/1756014 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832553064106557440 |
|---|---|
| author | Na Wang Liangchen Wang Hong Yang Tingting Xiong Shangping Xiao Jiawen Zhao Weiping Du |
| author_facet | Na Wang Liangchen Wang Hong Yang Tingting Xiong Shangping Xiao Jiawen Zhao Weiping Du |
| author_sort | Na Wang |
| collection | DOAJ |
| description | “Turn-off” fluorescent sensors for Cr(VI) have been fabricated based on organic polymer-capped gold nanoparticles. The fluorescence intensity, as well as the response behavior of the sensors, is dependent on the pH values of buffer solution and dilution amounts of the sensors. When diluted 50 times with pH 2.0 buffer solution, the sensors show good linear responses toward Cr(VI) at concentrations between 2.8–5.9 μM and 5.9–29 μM. The calculated detection limit is 0.63 μM (S/N=3). The interference study and real sample assays exhibit satisfying selectivity and reliability results. Furthermore, the quenched intensity of fluorescence could be recovered by Fe(II) ion, which provides a potential method to detect Fe(II) ions. The quenching and recovering mechanisms have also been investigated. It is suggested that the quenching mechanism is based on the combined effects of internal electron transfer and the inner filter effect. Finally, the recovering mechanism is based on the redox reactions between the Cr(VI) and Fe(II) ions. |
| format | Article |
| id | doaj-art-6da16636f02a460eabae38c6693a56a4 |
| institution | Kabale University |
| issn | 1687-8760 1687-8779 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Analytical Chemistry |
| spelling | doaj-art-6da16636f02a460eabae38c6693a56a42025-02-03T05:57:07ZengWileyInternational Journal of Analytical Chemistry1687-87601687-87792019-01-01201910.1155/2019/17560141756014Fluorescent Sensors Based on Organic Polymer-Capped Gold Nanoparticles for the Detection of Cr(VI) in WaterNa Wang0Liangchen Wang1Hong Yang2Tingting Xiong3Shangping Xiao4Jiawen Zhao5Weiping Du6School of Chemistry & Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, ChinaSchool of Chemistry & Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, ChinaSchool of Chemistry & Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, ChinaSchool of Chemistry & Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, ChinaSchool of Chemistry & Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, ChinaSchool of Chemistry & Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, ChinaSchool of Chemistry & Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, China“Turn-off” fluorescent sensors for Cr(VI) have been fabricated based on organic polymer-capped gold nanoparticles. The fluorescence intensity, as well as the response behavior of the sensors, is dependent on the pH values of buffer solution and dilution amounts of the sensors. When diluted 50 times with pH 2.0 buffer solution, the sensors show good linear responses toward Cr(VI) at concentrations between 2.8–5.9 μM and 5.9–29 μM. The calculated detection limit is 0.63 μM (S/N=3). The interference study and real sample assays exhibit satisfying selectivity and reliability results. Furthermore, the quenched intensity of fluorescence could be recovered by Fe(II) ion, which provides a potential method to detect Fe(II) ions. The quenching and recovering mechanisms have also been investigated. It is suggested that the quenching mechanism is based on the combined effects of internal electron transfer and the inner filter effect. Finally, the recovering mechanism is based on the redox reactions between the Cr(VI) and Fe(II) ions.http://dx.doi.org/10.1155/2019/1756014 |
| spellingShingle | Na Wang Liangchen Wang Hong Yang Tingting Xiong Shangping Xiao Jiawen Zhao Weiping Du Fluorescent Sensors Based on Organic Polymer-Capped Gold Nanoparticles for the Detection of Cr(VI) in Water International Journal of Analytical Chemistry |
| title | Fluorescent Sensors Based on Organic Polymer-Capped Gold Nanoparticles for the Detection of Cr(VI) in Water |
| title_full | Fluorescent Sensors Based on Organic Polymer-Capped Gold Nanoparticles for the Detection of Cr(VI) in Water |
| title_fullStr | Fluorescent Sensors Based on Organic Polymer-Capped Gold Nanoparticles for the Detection of Cr(VI) in Water |
| title_full_unstemmed | Fluorescent Sensors Based on Organic Polymer-Capped Gold Nanoparticles for the Detection of Cr(VI) in Water |
| title_short | Fluorescent Sensors Based on Organic Polymer-Capped Gold Nanoparticles for the Detection of Cr(VI) in Water |
| title_sort | fluorescent sensors based on organic polymer capped gold nanoparticles for the detection of cr vi in water |
| url | http://dx.doi.org/10.1155/2019/1756014 |
| work_keys_str_mv | AT nawang fluorescentsensorsbasedonorganicpolymercappedgoldnanoparticlesforthedetectionofcrviinwater AT liangchenwang fluorescentsensorsbasedonorganicpolymercappedgoldnanoparticlesforthedetectionofcrviinwater AT hongyang fluorescentsensorsbasedonorganicpolymercappedgoldnanoparticlesforthedetectionofcrviinwater AT tingtingxiong fluorescentsensorsbasedonorganicpolymercappedgoldnanoparticlesforthedetectionofcrviinwater AT shangpingxiao fluorescentsensorsbasedonorganicpolymercappedgoldnanoparticlesforthedetectionofcrviinwater AT jiawenzhao fluorescentsensorsbasedonorganicpolymercappedgoldnanoparticlesforthedetectionofcrviinwater AT weipingdu fluorescentsensorsbasedonorganicpolymercappedgoldnanoparticlesforthedetectionofcrviinwater |