Yin Yubo, Gao Yixun, Wang Jianqiang, Wang Quan, Wang Fengnan, Li Hao, French Paddy J, Paoprasert Peerasak, Umar Siddiqui Ahmad M, Wang Yao, Zhou Guofu
National Center for International Research on Green Optoelectronics, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China.
Department of Thoracic Oncology, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510006, P. R. China.
ACS Sens. 2024 Jun 28;9(6):3282-3289. doi: 10.1021/acssensors.4c00617. Epub 2024 Jun 12.
A new type of carbonized polymer dot was prepared by the one-step hydrothermal method of triethoxylsilane (TEOS) and citric acid (CA). The sensor made from carbonized polymer dots (CPDs) showed superior gas sensing performance toward ammonia at room temperature. The Si, O-codoped CPDs exhibited superior ammonia sensing performance at room temperature, including a low practical limit of detection (pLOD) of 1 ppm (/: 1.10, 1 ppm), short response/recovery time (30/36 s, 1 ppm), high humidity resistance (less than 5% undulation when changing relative humidity to 80 from 30%), high stability (less than 5% initial response undulation after 120 days), reliable repeatability, and high selectivity against other interferential gases. The gas sensing mechanism was investigated through control experiments and in situ FTIR, indicating that Si, O-codoping essentially improves the electron transfer capability of CPDs and synergistically dominates the superior ammonia sensing properties of the CPDs. This work presents a facile strategy for constructing novel high-performance, single-component carbonized polymer dots for gas sensing.
通过三乙氧基硅烷（TEOS）和柠檬酸（CA）的一步水热法制备了一种新型碳化聚合物点。由碳化聚合物点（CPD）制成的传感器在室温下对氨表现出优异的气敏性能。Si、O共掺杂的CPD在室温下表现出优异的氨传感性能，包括低实际检测限（pLOD）为1 ppm（/: 1.10, 1 ppm）、短响应/恢复时间（30/36 s，1 ppm）、高耐湿性（相对湿度从30%变为80%时波动小于5%）、高稳定性（120天后初始响应波动小于5%）、可靠的重复性以及对其他干扰气体的高选择性。通过对照实验和原位傅里叶变换红外光谱对气敏机理进行了研究，结果表明Si、O共掺杂从本质上提高了CPD的电子转移能力，并协同主导了CPD优异的氨传感性能。这项工作提出了一种简便的策略，用于构建用于气敏的新型高性能单组分碳化聚合物点。
