李影,刘凯,胡妙言,徐丽,张榅清,徐长妍.云杉碳点的制备及其在甲醛检测中的应用[J].包装工程,2022,43(17):11-19.
LI Ying,LIU Kai,HU Miao-yan,XU Li,ZHANG Wen-qing,XU Chang-yan.Preparation of Carbon Dots from Spruce Wood and Its Application in Detection of Formaldehyde[J].Packaging Engineering,2022,43(17):11-19. |
| 云杉碳点的制备及其在甲醛检测中的应用 |
| Preparation of Carbon Dots from Spruce Wood and Its Application in Detection of Formaldehyde |
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| DOI：10.19554/j.cnki.1001-3563.2022.17.002 |
| 中文关键词: 废弃云杉木包装 水热法 碳点 甲醛检测 |
| 英文关键词: waste spruce wood packaging hydrothermal method carbon dots detection of formaldehyde |
| 基金项目:国家自然科学基金(32071703);教育部青年人文社会科学研究基金(19YJC760132) |
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| 中文摘要: |
| 目的 为云杉木包装箱废弃物的二次利用提供新的途径。方法 将废弃的云杉木包装作为碳源，采用高温高压水热法，在180 ℃下反应10 h，制得云杉碳点(Spruce carbon dots，S−CDs)，并将其应用于甲醛检测。通过透射电镜(HRTEM)、原子力显微镜(AFM)、X射线衍射仪(XRD)等仪器对S−CDs的形貌、晶型结构、化学组成和光学性能进行表征。结果 S−CDs呈类球状，平均粒径为3.49 nm，量子产率为0.45%，其表面含有C—O、C=O、N—H等基团，水溶性较好，在365 nm紫外灯下会发出蓝色的荧光。采用比值荧光法将S−CDs应用于甲醛检测，S−CDs对甲醛表现出较好的响应性，在甲醛浓度为0~1 mmol/L内，其溶液的荧光强度F427/F490与甲醛浓度之间呈现良好的线性关系(R2=0.968)，检出极限值(LOD)达到0.045 mmol/L。结论 以云杉废弃木包装为单一碳源，成功地制备出可应用于甲醛检测的S−CDs，实现了废弃云杉木包装的二次利用和功能化。 |
| 英文摘要: |
| The work aims to provide a new way for the secondary utilization of waste spruce wood packaging. Waste spruce wood packaging was used as carbon source. Then, spruce carbon dots (S-CDs) were derived from carbon source by the hydrothermal method (180 ℃, 10 h) and applied to detection of formaldehyde. High-resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM) X-ray diffraction (XRD) and other instruments were used to investigate the morphology, crystallinity, chemical composition and optical properties of the S-CDs. In brief, S-CDs were spheroid with an average particle size of 3.49 nm, and the quantum yield was 0.45%. The surface contained C—O, C=O, N—H and other groups, which could be evenly dispersed in water. S-CDs were fluorescent blue excited at 365 nm. In addition, ratio fluorescence method was used to apply S-CDs in detection of formaldehyde. S-CDs showed a good response to formaldehyde. In the range of 0-1 mmol/L, the values of F427/F490 showed a good linear relationship with formaldehyde concentration (R2=0.968). The detection limit (LOD) was 0.045 mmol/L. Waste spruce wood packaging can be used as a single carbon source to prepare S-CDs which can be used for formaldehyde detection, thus realizing the secondary utilization and functionalization of waste spruce wood packaging. |
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