通过改变反应体系的pH值制备颜色可调的单宁酸基碳点

Preparing Colour-Tunable Tannic Acid-Based Carbon Dots by Changing the pH Value of the Reaction System.

作者信息

Li Yan, Liu Can, Chen Menglin, Zheng Yunwu, Tian Hao, Shi Rui, He Xiahong, Lin Xu

机构信息

National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, Kunming 650224, China.

Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China.

出版信息

Nanomaterials (Basel). 2022 Sep 3;12(17):3062. doi: 10.3390/nano12173062.

DOI:10.3390/nano12173062

PMID:36080100

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9457928/

Abstract

Biomass carbon dots (CDs) have the characteristics of being green, nontoxic, inexpensive, and simple to prepare, and they can be used in luminescence-related fields. In this study, red, green, and blue luminescent CDs were synthesised by a simple hydrothermal method under alkaline, neutral, and acidic conditions using TA as carbon source and -phthalaldehyde as blend. The unique optical properties of these CDs are due to the differences in their degrees of conjugation, which can be controlled by the pH value of the reaction system. These three kinds of biomass CDs have good applications in light-emitting diodes (LEDs). By mixing biomass CDs with epoxy resin, warm, and cold white LEDs with Commission Internationale de l'Elcairage (CIE) coordinates (0.35, 0.36) were successfully constructed on extremely stable multicolour CDs. This study shows that these biomass CDs are a promising material for white LED lighting.

摘要

生物质碳点（CDs）具有绿色、无毒、廉价且制备简单的特点，可用于发光相关领域。在本研究中，以TA为碳源、邻苯二甲醛为共混物，通过简单的水热法在碱性、中性和酸性条件下合成了红色、绿色和蓝色发光碳点。这些碳点独特的光学性质归因于其共轭程度的差异，而共轭程度可通过反应体系的pH值来控制。这三种生物质碳点在发光二极管（LED）中具有良好的应用。通过将生物质碳点与环氧树脂混合，在极其稳定的多色碳点上成功构建了色坐标为（0.35, 0.36）的暖白色和冷白色发光二极管。本研究表明，这些生物质碳点是用于白色发光二极管照明的一种有前景的材料。