Nitrogen‐doped carbon dots from Kraft lignin waste with inorganic acid catalyst and their brain cell imaging applications
Nitrogen‐doped carbon dots from Kraft lignin waste with inorganic acid catalyst and their brain cell imaging applications
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DOI：
10.1002/aic.17132
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发表时间：
2021-01
期刊：
影响因子：
3.7
通讯作者：
Yixian Pei;An-Yi Chang;Xuan Liu;Hua Wang;Hongbo Zhang;A. Radadia;Yuxin Wang;William W. Yu
中科院分区：
文献类型：
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作者：
Yixian Pei;An-Yi Chang;Xuan Liu;Hua Wang;Hongbo Zhang;A. Radadia;Yuxin Wang;William W. Yu
碳量子点（C-QD）显示出取代传统量子点作为下一代荧光探针的潜力。我们在这里展示了一种新的C-QD生产工艺，使用木质素作为起始碳源，木质素是一种高容量但低市场价值的工业废物和/或环境危害。通过添加少量无机酸，木质素中丰富的酚类组分通过与传统化石燃料裂解过程中在固体酸催化剂上发生的类似的结焦形成机理成功地转化为C-QD。所接收的木质素C-QD的水溶液存在有利于脑细胞成像应用，这归因于它们的快速内化、低毒性、在水热合成期间通过适当的酸度和反应温度可调谐的光致发光。这种方法不仅提供了一种低成本的C-QD生产路线，而且有助于为许多位于农村地区的小型农业企业和造纸和纸浆工业获得额外的利润和/或改善环境。
Carbon quantum dots (C‐QDs) show potential to replace traditional semiconductive quantum dots as the next generation of fluorescent probes. We demonstrate here a new C‐QD production process using lignin, a high‐volume but low market‐value industrial waste and/or environmental hazards, as the starting carbon source. By adding a small amount of inorganic acid, the rich phenolic components in lignin were successfully converted to C‐QDs through a coking formation mechanism similar to what happens on solid acid catalysts in traditional fossil fuel cracking process. Their aqueous solution presence of the received lignin C‐QDs is beneficial for brain cell imaging applications, attributing to their fast internalization, low toxicity, tunable photoluminescence by appropriate acidity and reaction temperature during hydrothermal synthesis. This method not only provides a low‐cost C‐QDs production route, but also helps gain extra profit and/or improve environment for many small agricultural business and paper and pulp industry located in rural area.