文献类型：期刊文献

英文题名：Interaction of lignin and xylan in the hydrothermal synthesis of lignocellulose-based carbon quantum dots and their application in in-vivo bioimaging

作者：Zhao, Siyu[1,2] Chen, Xinrui[1,2] Su, Jingyan[3] Zhao, Peitao[4] Si, Chuanling[5] Xu, Ting[5] Huang, Chen[6] Song, Xueping[1,2]

第一作者：Zhao, Siyu

通信作者：Song, XP[1]

机构：[1]Guangxi Univ, Coll Light Ind & Food Engn, Nanning 530004, Peoples R China;[2]Guangxi Key Lab Clean Pulp & Papermaking & Pollut, Nanning 530004, Peoples R China;[3]Guangxi Zhuang Autonomous Reg Corps Hosp Chinese P, Nanning 530003, Peoples R China;[4]China Univ Min & Technol, Sch Elect & Power Engn, Xuzhou 221116, Peoples R China;[5]Tianjin Univ Sci & Technol, Sch Light Ind Sci & Engn, Tianjin 300457, Peoples R China;[6]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China

年份：2022

卷号：222

起止页码：1876-1887

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20242616410970);Scopus(收录号：2-s2.0-85139640568);WOS:【SCI-EXPANDED(收录号:WOS:000892266900001)】；

基金：The project was sponsored by the National Key Research and Development Program of China (grant no. 2021YFE0114400) , National Natural Science Foundation of China (grant no. 22268007) , Natural Science Foundation of Guangxi Province, China (grant no. 2021GXNSFDA196006) , and the Foundation of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University (grant nos. 2021KF20, 2021KF02, 2021KF32, and 2021KF34) . The authors would like to thank the Shiyan Jia lab ( www.shiyanjia.com ) for the XPS test.

语种：英文

外文关键词：Carbon quantum dots; Nucleation and growth; In -vivo imaging

摘要：The complex interaction of lignin, cellulose, and hemicellulose in the hydrothermal degradation progress of lignocellulose, has led to uncertainty in the hydrothermal synthesis of lignocellulose-based CQDs (LC-CQDs). This makes it difficult to identify the specific formation mechanism of LC-CQDs. To simplify the reaction system and comprehensively describe the formation of LC-CQDs, both lignin and hemicellulose, the main hydrothermal degradation products of lignocellulose, were used as precursor to simulate and explore the synthesis of LC-CQDs at different time intervals (2-12 h). First, different lignin models were employed for preparing CQDs to determine the key lignin structure that govern CQDs formation. G-type lignin-model based CQDs were shown to have higher fluorescence intensity than H- and S-type. Then, G-type lignin model and hemicellulose model (xylan) were used simultaneously hydrothermal to prepare LC-CQDs. The analysis shows that the carbon nucleus preferentially formed by the lignin provides growth sites for small molecules degraded from hemicellulose, which gradually grow around the carbon core over time, thus forming a "sunflower" structure of CQDs. The presence of a lignin model could effectively guide the small molecules toward CQDs formation instead of carbonization. Additionally, the CQDs exhibit good in-vivo imaging performance.