High fluorescent sulfur regulating graphene quantum dots with tunable photoluminescence properties
High fluorescent sulfur regulating graphene quantum dots with tunable photoluminescence properties
复制标题
具有可调光致发光特性的高荧光硫调节石墨烯量子点
DOI：
10.1016/j.jcis.2018.06.016
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发表时间：
2018-11-01
影响因子：
9.9
通讯作者：
Wang, Liang
中科院分区：
文献类型：
--
作者：
Luo, Yi;Li, Ming;Wang, Liang
采用两种简便的水热合成技术制备了硫掺杂石墨烯量子点(S-GQD)。重点研究了GQD和S-GQD样品的光致发光特性。通过调节S-GQD合成过程中S粉末的含量，优化后的S-GQD具有较高的S/C原子比，达到19.53%。S掺杂在S-3样品的Csp(2)骨架上引入了更多的官能团，导致在紫外区出现了强吸收带。与已报道的S-GQD相比，S-GQD表现出压倒性的高荧光量子产率(57%)和与激发无关的发射，这是由于硫原子的掺杂产生的。此外，S的掺杂可以提高GQD的发光强度，其提高效率依赖于噻吩硫的含量。(C)2018 Elsevier Inc.保留所有权利。
Sulfur-doped graphene quantum dots (S-GQDs) were synthesized by two facile hydrothermal technologies. The photoluminescence (PL) properties of the GQDs and S-GQDs samples were mainly investigated. Through regulating the content of S powders in S-GQDs synthesizing process, the optimal S-GQDs have a high S/C atomic ratio of 19.53%. The S doping introduce more functional groups on the C sp(2) skeleton of S-3 sample and result in the appearance of the strong absorption band in the UV region. In comparison with other reported S-GQDs, the S-GQDs exhibit overwhelming high fluorescence quantum yield (57%) and excitation-independent emission, resulting from the outcome of the doped sulfur atoms. Moreover, the PL intensity of GQDs can be increased by doping it with S and the increasing efficiency depends on the thiophene sulfur content. (C) 2018 Elsevier Inc. All rights reserved.