Bao Xin, Lyu Bin, Gao Dangge, Chen Zhixin, Ouyang Yang, Guo Xu, Ma Jianzhong
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, China; National Demonstration Center for Experimental Light Chemistry Engineering Education (Shaanxi University of Science & Technology), Xi'an, 710021, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials (Shaanxi University of Science & Technology), Xi'an, 710021, China.
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, China; National Demonstration Center for Experimental Light Chemistry Engineering Education (Shaanxi University of Science & Technology), Xi'an, 710021, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials (Shaanxi University of Science & Technology), Xi'an, 710021, China.
Environ Res. 2025 Apr 1;270:121030. doi: 10.1016/j.envres.2025.121030. Epub 2025 Feb 3.
All-inorganic cesium bismuth bromide perovskite quantum dots(CsBiBr PQDs) have emerged as promising alternatives to lead-based perovskite quantum dots with excellent performance due to their low toxicity, drawing extensive attention over recent decades. However, challenges remain in terms of their stability and the reliance on organic solvents during the preparation process. Herein, a novel synthesis method for CsBiBr PQDs is introduced, utilizing eco-friendly castor oil as both the solvent and ligand (CO-CsBiBr). These PQDs display a vivid blue emission at 430 nm, with an impressive photoluminescence quantum yield (PLQY) of 21.2%. Furthermore, they maintain 97.3% of their fluorescence intensity after 72 h of environmental exposure. The effects of various components of castor oil, including ricinoleic, oleic and linoleic acid, on crystal growth and properties of the CsBiBr are investigated. Significantly, the presence of conjugated double bonds in linoleic acid, when used as a solvent, results in a PLQY of up to 53% for the synthesized CsBiBr PQDs. Moreover, CO-CsBiBr PQDs are introduced into leather by a layer-by-layer self-assembly method, the bright blue fluorescent pattern can be observed in the CO-CsBiBr/leather under ultraviolet irradiation, indicating the leather anti-counterfeiting potential of CO-CsBiBr PQDs. This study opens a novel pathway for the sustainable synthesis of PQDs through the utilization of castor oil-derived natural green solvents.
全无机溴化铯铋钙钛矿量子点（CsBiBr PQDs）因其低毒性已成为具有优异性能的铅基钙钛矿量子点的有前途的替代品，在近几十年中受到广泛关注。然而，在其稳定性以及制备过程中对有机溶剂的依赖方面仍然存在挑战。在此，介绍了一种用于CsBiBr PQDs的新型合成方法，利用环保的蓖麻油作为溶剂和配体（CO-CsBiBr）。这些量子点在430nm处呈现出鲜艳的蓝色发射，光致发光量子产率（PLQY）高达21.2%。此外，在环境暴露72小时后，它们仍保持其荧光强度的97.3%。研究了蓖麻油的各种成分，包括蓖麻油酸、油酸和亚油酸，对CsBiBr晶体生长和性能的影响。值得注意的是，当亚油酸用作溶剂时，其共轭双键的存在使得合成的CsBiBr PQDs的PLQY高达53%。此外，通过层层自组装方法将CO-CsBiBr PQDs引入皮革中，在紫外光照射下可在CO-CsBiBr/皮革中观察到明亮的蓝色荧光图案，表明CO-CsBiBr PQDs具有皮革防伪潜力。本研究通过利用蓖麻油衍生的天然绿色溶剂为量子点的可持续合成开辟了一条新途径。
