张禹姝,胡妙言,高诗雨,孙天懿,徐丽,张榅清,徐长妍.樟子松基碳量子点的制备工艺优化[J].包装工程,2022,43(21):40-49.
ZHANG Yu-shu,HU Miao-yan,GAO Shi-yu,SUN Tian-yi,XU Li,ZHANG Wen-qing,XU Chang-yan.Optimization of Preparation Process of Pinus Sylvestris-based Carbon Quantum Dots[J].Packaging Engineering,2022,43(21):40-49. |
| 樟子松基碳量子点的制备工艺优化 |
| Optimization of Preparation Process of Pinus Sylvestris-based Carbon Quantum Dots |
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| DOI：10.19554/j.cnki.1001-3563.2022.21.006 |
| 中文关键词: 樟子松木材包装废弃物 硫氮掺杂碳量子点 荧光量子产率 |
| 英文关键词: Pinus sylvestris wood packaging waste sulfur and nitrogen doped carbon quantum dots fluorescence quantum yield |
| 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 将樟子松木材包装废弃物转化为荧光碳量子点，为实现废弃樟子松木材包装的高值化综合利用探索一条新途径。方法 以60目樟子松木材包装废弃物为碳量子点前驱体，分别以硫酸和乙二胺为硫和氮掺杂剂，在温度为200 ℃、时间为10 h的水热条件下合成樟子松基碳量子点。采用紫外可见光分光光度计、荧光分光光度计、透射电子显微镜、傅里叶红外光谱仪和X射线光电子能谱仪等表征手段，研究原材料配比对所制备樟子松基碳量子点物理结构、化学结构和光学性质的影响，并以碳量子点的荧光量子产率为评价指标，优化樟子松基碳量子点的制备工艺。结果 所得硫氮掺杂碳量子点呈规则球形，其平均粒径及粒径分布分别为4.30 nm和2.01~6.63 nm;当原材料配比为m(樟子松木粉)∶m(硫酸)∶m(乙二胺)=1∶1∶1时，合成的掺杂碳量子点的荧光最强、荧光量子产率最高。当樟子松木粉、去离子水、硫酸和乙二胺的质量比为1.250∶50∶1.250∶1.250时，掺杂碳量子点的荧光量子产率比未掺杂碳量子点的高约80倍。结论 将樟子松木材包装废弃物转化为荧光碳量子点，是实现废弃樟子松木材包装的高值化综合利用的新途径。 |
| 英文摘要: |
| The work aims to transform the wood packaging waste of Pinus sylvestris into fluorescent carbon quantum dots, so as to explore a new way of realizing the high-value comprehensive utilization of waste wood packaging of Pinus sylvestris. The 60-mesh Pinus sylvestris wood packaging waste was used as the precursor of carbon quantum dots, and sulfuric acid and ethylenediamine were used as sulfur and nitrogen dopants to synthesize Pinus sylvestris-based carbon quantum dots under hydrothermal conditions of 200 ℃ for 10 h. The effects of raw material ratio on the physical structure, chemical structure and optical properties of Pinus sylvestris-based carbon quantum dots were studied by means of UV-Vis spectrophotometer, fluorescence spectrophotometer, transmission electron microscope, Fourier infrared spectrometer and X-ray photoelectron spectrometer. The preparation process of Pinus sylvestris-based carbon quantum dots was optimized with fluorescence quantum yield of carbon dots as the evaluation index. The obtained sulfur nitrogen doped carbon quantum dots were regular spherical, and their average particle size and particle size distribution were 4.30 nm and 2.01-6.63 nm, respectively. When the ratio of raw materials was Pinus sylvestris powder:sulfuric acid:ethylenediamine=1:1:1 (weight ratio), the fluorescence of the doped carbon quantum dots was the strongest and the fluorescence quantum yield was the highest. When the weight ratio of Pinus sylvestris powder, deionized water, sulfuric acid and ethylenediamine was 1.250∶50∶1.250∶1.250, the fluorescence quantum yield of doped carbon quantum dots was about 80 times higher than that of undoped carbon quantum dots. Converting the wood packaging waste of Pinus sylvestris into fluorescent carbon quantum dots is a new way to realize the high-value comprehensive utilization of waste wood packaging of Pinus sylvestris. |
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