Wang Yaru, Wang Zhaolong, Gao Yangfan, Yuan Yi, Liu Jianfei, Yan Jun, Chen Yunlin
School of Physical Science and Engineering, Beijing Jiaotong University Beijing 100044 China
RSC Adv. 2022 Oct 24;12(47):30262-30269. doi: 10.1039/d2ra05494a.
Chlorobenzene (CHCl) is a flammable liquid with high vapor activity, which is a severe threat to the environment and human health. Therefore, it is essential to develop a highly efficient sensor to detect CHCl vapor. Herein, we developed a UiO-66 three-dimensional photonic crystal (3D PC) optical sensor and investigated its sensing properties toward the CHCl vapor. The UiO-66 3D PCs optical sensor shows a high sensitivity of CHCl vapor, in the concentrations range of 0-500 ppm, the reflectance intensity response to be 0.06% ppm with a good linear relationship, detection limit can reach 1.64 ppm and the quality factor is 10.8. Additionally, the UiO-66 3D PC optical sensor demonstrated great selectivity with the values of selectivity () varying from 2.24 to 10.65 for the CHCl vapor as compared with carbon tetrachloride (CCl), dichloromethane (CHCl), 1,1,2-trichloroethane (CHCl), benzene (CH), deionized water (HO), ethanol (CHOH) and methyl alcohol (CHOH) vapors. Moreover, the UiO-66 3D PC optical sensor shows an ultrafast optical response time and recovery times of 0.5 s and 0.45 s with exceptional stability and repeatability to 500 ppm CHCl vapor. These excellent sensing properties are attributed to the efficacy of signal transduction, increased porosity and gas adsorption sites, which are intrinsically endowed by the design of the 3D optical structure. The design and fabrication of this UiO-66 3D PC optical sensor might open up potential applications for the detection of the CHCl vapor.
氯苯（CHCl）是一种具有高蒸汽活性的易燃液体，对环境和人类健康构成严重威胁。因此，开发一种高效的传感器来检测CHCl蒸汽至关重要。在此，我们开发了一种UiO-66三维光子晶体（3D PC）光学传感器，并研究了其对CHCl蒸汽的传感特性。UiO-66 3D PC光学传感器对CHCl蒸汽具有高灵敏度，在0-500 ppm的浓度范围内，反射强度响应为0.06% ppm，具有良好的线性关系，检测限可达1.64 ppm，品质因数为10.8。此外，与四氯化碳（CCl）、二氯甲烷（CHCl）、1,1,2-三氯乙烷（CHCl）、苯（CH）、去离子水（HO）、乙醇（CHOH）和甲醇（CHOH）蒸汽相比，UiO-66 3D PC光学传感器对CHCl蒸汽表现出极大的选择性，选择性值（）在2.24至10.65之间变化。此外，UiO-66 3D PC光学传感器显示出超快的光学响应时间，对500 ppm CHCl蒸汽的恢复时间分别为0.5 s和0.45 s，具有出色的稳定性和重复性。这些优异的传感特性归因于信号转导的有效性、孔隙率的增加和气体吸附位点，这些都是3D光学结构设计所固有的。这种UiO-66 3D PC光学传感器的设计和制造可能为CHCl蒸汽的检测开辟潜在的应用。
