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Publication
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| Title of Article |
Fluorescence switching sensor based on graphene quantum dots decorated with Hg2+ and hydrolyzed thioacetamide for highly Ag+ -sensitive and selective detection |
| Date of Acceptance |
2 October 2017 |
| Journal |
| Title of Journal |
RSC advances |
| Standard |
ISI |
| Institute of Journal |
the royal socity of chemistry |
| ISBN/ISSN |
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| Volume |
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| Issue |
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| Month |
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| Year of Publication |
2017 |
| Page |
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| Abstract |
A selective fluorescence sensor for the determination of silver ion (Ag+) was developed based on graphene quantum dots (GQDs). The GQDs were prepared by the citric acid pyrolysis method. In the presence of mercury ion (Hg2+), the fluorescence intensity of GQDs decreased linearly and it was fully recovered by hydrolysis of thioacetamide (TAA), giving hydrogen sulfide in the reaction system. This research study was aimed to use as fluorescent turn-off sensor for the selective determination of Ag+. Upon the addition of Ag+, the fluorescence intensity of the generated sulfide-(Hg2+ quenched GQDs) decreased as a linear function of the Ag+ concentration. Then, the acquired GQDs showed steady, selective, and highly sensitive detection of Ag+. The experimental parameters affecting the fluorescence turn-on/off sensor were investigated and optimized. The optimum conditions included 4 μM Hg2+ concentration,70 μM TAA concentration, solution pH 7 and 5 min reaction time. Under the optimized conditions, working linear concentration range, the limit of detection and limit of quantification for Ag+ were 0.5-10.0, 0.18 and 0.60 μM, respectively. The proposed method was successfully applied for the selective determination of trace amounts of Ag+ in five real water samples with satisfied recoveries (89.31-114.08%). |
| Keyword |
Fluorescence sensor, graphene quantum dots, mercury, silver, thioacetamide, 43 water sample |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ได้รับการตอบรับให้ตีพิมพ์ |
| Level of Publication |
นานาชาติ |
| citation |
true |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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