Sustainable and Green Synthesis of Waste-Biomass-Derived Carbon Dots for Parallel and Semi-Quantitative Visual Detection of Cr(VI) and Fe3+

Molecules

Kai Zhou¹  Yuanhua Zhang²  Kailian Zhang²  Lan Xia²  Qifeng Fu²  Long Yuan²  Rui Shi³  Xiuju Li⁴ 

[1] Analytical and Testing Center, Chongqing University, Chongqing 401331, China;Department of Pharmaceutical Analysis, School of Pharmacy, Southwest Medical University, Luzhou 646000, China;Emergency Department, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Southwest Medical University, Luzhou 646000, China;School of Pharmacy, Tongren Polytechnic College, Tongren 554300, China;

关键词: carbon dots;    waste biomass;    flowers of wintersweet;    Cr(VI);    Fe³⁺;    parallel sensing;   

DOI  :  10.3390/molecules27041258

来源: DOAJ

【 摘 要 】

Carbon dot (CD)-based multi-mode sensing has drawn much attention owing to its wider application range and higher availability compared with single-mode sensing. Herein, a simple and green methodology to construct a CD-based dual-mode fluorescent sensor from the waste biomass of flowers of wintersweet (FW-CDs) for parallel and semi-quantitative visual detection of Cr(VI) and Fe³⁺ was firstly reported. The FW-CD fluorescent probe had a high sensitivity to Cr(VI) and Fe³⁺ with wide ranges of linearity from 0.1 to 60 µM and 0.05 to 100 µM along with low detection limits (LOD) of 0.07 µM and 0.15 µM, respectively. Accordingly, the FW-CD-based dual-mode sensor had an excellent parallel sensing capacity toward Cr(VI) and Fe³⁺ with high selectivity and strong anti-interference capability by co-using dual-functional integration and dual-masking strategies. The developed parallel sensing platform was successfully applied to Cr(VI) and Fe³⁺ quantitative detection in real samples with high precision and good recovery. More importantly, a novel FW-CD-based fluorescent hydrogel sensor was fabricated and first applied in the parallel and semi-quantitative visual detection of Cr(VI) and ferrous ions in industrial effluent and iron supplements, further demonstrating the significant advantage of parallel and visual sensing strategies.

【 授权许可】

Unknown