Acidophilic S-doped carbon quantum dots derived from cellulose fibers and their fluorescence sensing performance for metal ions in an extremely strong acid environment
Acidophilic S-doped carbon quantum dots derived from cellulose fibers and their fluorescence sensing performance for metal ions in an extremely strong acid environment
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DOI：
10.1039/c6ta05943k
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发表时间：
2016-08
影响因子：
--
通讯作者：
Guanghui Yang;Xuejuan Wan;Su Yikun;Xierong Zeng;Jiaoning Tang
中科院分区：
文献类型：
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作者：
Guanghui Yang;Xuejuan Wan;Su Yikun;Xierong Zeng;Jiaoning Tang
为了实现对水环境中可溶性重金属污染的快速定性和定量评价，需要开发在强酸（pH < 2）溶液中具有优异金属离子检测能力的嗜酸荧光传感器。本研究以纤维素纤维为碳前驱体，硫酸为碳化剂和掺杂剂，合成了新型硫掺杂碳量子点。S-CQDs在强酸溶液中表现出极强的亲酸性和高的发光效率（高达32%）。更重要的是，所制备的S-CQDs成功地用于检测pH 0溶液中的Fe 3+，具有优异的选择性和灵敏度，检测限低至0.96 μM。基于这些结果，本研究为开发可在强酸条件下使用的CQD传感器提供了基础。
To achieve a rapid qualitative and quantitative evaluation of the total soluble heavy metal contamination in an aquatic environment, acidophilic fluorescent sensors with excellent metal ion detection capacity in strong acid (pH < 2) solutions require development. In this study, novel S-doped carbon quantum dots (S-CQDs) are synthesized from widely available cellulose fibers as carbon precursors and sulfuric acid as the carbonization agent and dopant. The S-CQDs exhibit extremely acidophilic high luminescence and a high quantum yield (up to 32%) in strong acid solutions. More importantly, the as-prepared S-CQDs are successfully utilized to detect Fe3+ in pH 0 solutions with excellent selectivity and sensitivity, with a detection limit as low as 0.96 μM. Based on the results, this study provides a foundation for the development of CQD sensors that can be used under strong acid conditions.