Wang Zhaolong, Zhan Kuo, Zhu Yabin, Yan Jun, Liu Bin, Chen Yunlin
Institute of Applied Micro-Nano Materials, School of Science, Beijing Jiaotong University, Beijing 100044, China.
Analyst. 2021 Nov 22;146(23):7240-7249. doi: 10.1039/d1an01502h.
Superior sensitive, selective, and repeatable real-time detection of low concentrations of benzene vapor is vitally important for environmental protection and human health. A benzene vapor sensor using three-dimensional photonic crystals (3-D PCs) based on zeolitic imidazolate framework-8@graphene quantum dots (ZIF-8@GQDs) was proposed. The 3-D PCs were acquired by centrifuging ZIF-8@GQDs pseudo-solutions, which were prepared hydrothermal methods. The application of the ZIF-8@GQDs 3-D PCs sensor for optical benzene vapor detection the strong π-π stacking interactions and large specific surface area and abundant open-framework structure of the ZIF-8@GQDs was investigated. The ZIF-8@GQDs 3-D PCs sensor exhibits a more sensitive response to benzene vapor compared with the ZIF-8 3-D PCs sensor. The relationship between the wavelength shift and the benzene vapor concentration was demonstrated to be linear. Additionally, the ZIF-8@GQDs 3-D PCs sensor presents a fast optical response and recovery times of 1 s and 7 s for 200 ppm benzene vapor detection, the benzene vapor detection limit can reach 1 ppm, and the deviation of the reflected wavelength varied within 2 nm after 10 cycles. Moreover, the fabricated ZIF-8@GQDs 3-D PCs sensor exhibited reliability and exceptional thermal and long-time storage stability, demonstrating great potential for practical benzene vapor sensing applications.
对低浓度苯蒸气进行高灵敏度、高选择性和可重复的实时检测对于环境保护和人类健康至关重要。本文提出了一种基于沸石咪唑酯骨架-8@石墨烯量子点（ZIF-8@GQDs）的三维光子晶体（3-D PCs）苯蒸气传感器。通过离心水热法制备的ZIF-8@GQDs假溶液获得了3-D PCs。研究了ZIF-8@GQDs 3-D PCs传感器利用ZIF-8@GQDs的强π-π堆积相互作用、大比表面积和丰富的开放框架结构进行光学苯蒸气检测的应用。与ZIF-8 3-D PCs传感器相比，ZIF-8@GQDs 3-D PCs传感器对苯蒸气表现出更灵敏的响应。波长偏移与苯蒸气浓度之间的关系被证明是线性的。此外，ZIF-8@GQDs 3-D PCs传感器呈现出快速的光学响应，对于200 ppm苯蒸气检测的响应和恢复时间分别为1 s和7 s，苯蒸气检测限可达到1 ppm，并且在10个循环后反射波长的偏差在2 nm内变化。此外，所制备的ZIF-8@GQDs 3-D PCs传感器表现出可靠性以及出色的热稳定性和长期存储稳定性，在实际苯蒸气传感应用中显示出巨大潜力。
