Cultivating Fluorescent Flowers with Highly Luminescent Carbon Dots Fabricated by a Double Passivation Method
In this work, we present the fabrication of highly luminescent carbon dots (CDs) by a double passivation method with the assistance of Ca(OH)2. In the reaction process, Ca2+ protects the active functional groups from overconsumption during dehydration and carbonization, and the electron-withdrawing...
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doaj-bb5f1ff70bcb4b219a5f2a4e5a0016ec2020-11-24T23:14:52ZengMDPI AGNanomaterials2079-49912017-07-017717610.3390/nano7070176nano7070176Cultivating Fluorescent Flowers with Highly Luminescent Carbon Dots Fabricated by a Double Passivation MethodShuai Han0Tao Chang1Haiping Zhao2Huanhuan Du3Shan Liu4Baoshuang Wu5Shenjun Qin6College of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, ChinaCollege of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, ChinaKey Laboratory of Resource Exploration Research of Hebei Province, Hebei University of Engineering, Handan 056038, ChinaCollege of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, ChinaCollege of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, ChinaCollege of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, ChinaKey Laboratory of Resource Exploration Research of Hebei Province, Hebei University of Engineering, Handan 056038, ChinaIn this work, we present the fabrication of highly luminescent carbon dots (CDs) by a double passivation method with the assistance of Ca(OH)2. In the reaction process, Ca2+ protects the active functional groups from overconsumption during dehydration and carbonization, and the electron-withdrawing groups on the CD surface are converted to electron-donating groups by the hydroxyl ions. As a result, the fluorescence quantum yield of the CDs was found to increase with increasing Ca(OH)2 content in the reaction process. A blue-shift optical spectrum of the CDs was also found with increasing Ca(OH)2 content, which could be attributed to the increasing of the energy gaps for the CDs. The highly photoluminescent CDs obtained (quantum yield: 86%) were used to cultivate fluorescent carnations by a water culture method, while the results of fluorescence microscopy analysis indicated that the CDs had entered the plant tissue structure.https://www.mdpi.com/2079-4991/7/7/176carbon dotssurface passivationluminescenceCa(OH)2flowers |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shuai Han Tao Chang Haiping Zhao Huanhuan Du Shan Liu Baoshuang Wu Shenjun Qin |
spellingShingle |
Shuai Han Tao Chang Haiping Zhao Huanhuan Du Shan Liu Baoshuang Wu Shenjun Qin Cultivating Fluorescent Flowers with Highly Luminescent Carbon Dots Fabricated by a Double Passivation Method Nanomaterials carbon dots surface passivation luminescence Ca(OH)2 flowers |
author_facet |
Shuai Han Tao Chang Haiping Zhao Huanhuan Du Shan Liu Baoshuang Wu Shenjun Qin |
author_sort |
Shuai Han |
title |
Cultivating Fluorescent Flowers with Highly Luminescent Carbon Dots Fabricated by a Double Passivation Method |
title_short |
Cultivating Fluorescent Flowers with Highly Luminescent Carbon Dots Fabricated by a Double Passivation Method |
title_full |
Cultivating Fluorescent Flowers with Highly Luminescent Carbon Dots Fabricated by a Double Passivation Method |
title_fullStr |
Cultivating Fluorescent Flowers with Highly Luminescent Carbon Dots Fabricated by a Double Passivation Method |
title_full_unstemmed |
Cultivating Fluorescent Flowers with Highly Luminescent Carbon Dots Fabricated by a Double Passivation Method |
title_sort |
cultivating fluorescent flowers with highly luminescent carbon dots fabricated by a double passivation method |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2017-07-01 |
description |
In this work, we present the fabrication of highly luminescent carbon dots (CDs) by a double passivation method with the assistance of Ca(OH)2. In the reaction process, Ca2+ protects the active functional groups from overconsumption during dehydration and carbonization, and the electron-withdrawing groups on the CD surface are converted to electron-donating groups by the hydroxyl ions. As a result, the fluorescence quantum yield of the CDs was found to increase with increasing Ca(OH)2 content in the reaction process. A blue-shift optical spectrum of the CDs was also found with increasing Ca(OH)2 content, which could be attributed to the increasing of the energy gaps for the CDs. The highly photoluminescent CDs obtained (quantum yield: 86%) were used to cultivate fluorescent carnations by a water culture method, while the results of fluorescence microscopy analysis indicated that the CDs had entered the plant tissue structure. |
topic |
carbon dots surface passivation luminescence Ca(OH)2 flowers |
url |
https://www.mdpi.com/2079-4991/7/7/176 |
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