Acidophilic S-doped carbon quantum dots derived from cellulose fibers and their fluorescence sensing performance for metal ions in an extremely strong acid environment

作者：Yang, Guanghui; Wan, Xuejuan^*; Su, Yikun; Zeng, Xierong; Tang, Jiaoning

来源：Journal of Materials Chemistry A, 2016, 4(33): 12841-12849.

DOI：10.1039/c6ta05943k

• ONE-STEP SYNTHESIS
• ATOMIC-ABSORPTION-SPECTROMETRY
• HIGHLY LUMINESCENT N
• FACILE SYNTHESIS
• UP-CONVERSION
• NANODOTS
• NITROGEN
• PHOTOLUMINESCENCE
• NANOPARTICLES
• SULFUR

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 mu M. Based on the results, this study provides a foundation for the development of CQD sensors that can be used under strong acid conditions.

• 出版日期2016
• 单位深圳大学