化工新型材料

化工新型材料 ›› 2026, Vol. 54 ›› Issue (6) : 275-282. DOI: 10.19817/j.cnki.issn1006-3536.2026.06.042

开发与应用

红景天衍生碳点用于Cr⁶⁺检测和食品保鲜

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作者信息 +

Rhodiola rosea-derived carbon dots for Cr⁶⁺ detection and food preservation

Wang Hui¹, Luo Xiaoyu^1,2, Li Chengqian^1,2, Han Yong¹

Author information +

文章历史 +

Received
2025-12-30
Issue Date	Revised Date
2026-06-18	2025-12-30

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摘要

以红景天为碳源,通过一步水热法合成蓝色荧光碳点(B-CDs),在350nm激发下于430nm处呈现强发射峰。基于Cr⁶⁺可特异性猝灭该荧光,构建了用于检测环境水体中Cr⁶⁺的荧光探针。该探针对Cr⁶⁺在1～70μmol/L范围内线性良好,检出限为0.015μmol/L。在实际水样加标实验中,回收率为85.69%～114.99%,相对标准偏差为0.92%～7.85%,表明方法准确、重现性好。此外,B-CDs浸渍液对香菇和小番茄具有一定保鲜作用。实现了“一材双用”的功能化设计,为重金属检测与食品保鲜提供了一种绿色、多功能的碳基材料新策略。

Abstract

Blue fluorescent carbon dots (B-CDs) were synthesized via a one-step hydrothermal method using Rhodiola rosea as the carbon source.The B-CDs exhibited strong fluorescence emission at 430nm upon excitation at 350nm.A fluorescence probe was developed for the detection of Cr⁶⁺ in environmental water based on its specific quenching effect on the fluorescence of the B-CDs.The probe exhibited a good linear response to Cr⁶⁺ across a concentration range of 1～70μmol/L,with a detection limit of 0.015μmol/L.In spiked recovery tests using real water samples,the recovery rates ranged from 85.69% to 114.99%,with relative standard deviations between 0.92% and 7.85%,confirming the method's accuracy and reproducibility.Furthermore,the B-CDs impregnated solution demonstrated preservative effects on shiitake mushrooms and cherry tomatoes.This work provides dual-purpose application of carbon-based material and contributes to a green,multifunctional strategy for heavy metal detection and food preservation.

关键词

碳点 / 荧光检测 / 保鲜 / 六价铬离子

Key words

carbon dots / fluorescence detection / preservation / Cr⁶⁺

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红景天衍生碳点用于Cr⁶⁺检测和食品保鲜[J]. 化工新型材料, 2026, 54(6): 275-282 DOI:10.19817/j.cnki.issn1006-3536.2026.06.042

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