Wang Dong, Zhang Yuan, Li Xiaoting, Lei Peng, Shuang Shaomin, Dong Chuan
Institute of Environmental Science, Shanxi University, Wucheng No. 92, rd, Taiyuan, Shanxi, PR China.
Institute of Environmental Science, Shanxi University, Wucheng No. 92, rd, Taiyuan, Shanxi, PR China.
J Hazard Mater. 2025 Apr 5;487:137133. doi: 10.1016/j.jhazmat.2025.137133. Epub 2025 Jan 7.
Hydroquinone (HQ) is a prevalent pollutant in aquatic environments, posing significant risks to ecosystems and human health. Practical methods for the simultaneous detection and degradation of HQ are essential. To address this requirement, a dual-mode detection and degradation strategy has been developed utilizing designed nanozymes (DM) consisting of a porous SiO core and MnO shell. Due to the catalytic activity of DM nanozymes, the three types of reactive oxygen species (ROS), singlet oxygen (O), superoxide anion (O), and hydroxyl radical (•OH), were generated to induce the color transferring of 3,3',5,5'-tetramethylbenzidine (TMB) from colorless to blue form (oxTMB). During the reductive HQ-mediated oxTMB fading, the DM has significant selectivity towards HQ from isomers (catechol and resorcinol) due to the differing reductive reaction rates, with an excellent linear range of 0.2-45 μM with a detection limit as low as 0.11 μM. In addition, according to the color parameter changes in the sensing process, colorimeters and smartphones are utilized to achieve on-site and convenient HQ detection. Besides, the DM nanozyme can oxidatively decompose HQ without auxiliary equipment. We believe this research provides a powerful tool for detecting and removing HQ precisely.
对苯二酚（HQ）是水生环境中一种普遍存在的污染物，对生态系统和人类健康构成重大风险。同时检测和降解HQ的实用方法至关重要。为满足这一需求，已开发出一种利用由多孔SiO核和MnO壳组成的设计纳米酶（DM）的双模式检测和降解策略。由于DM纳米酶的催化活性，产生了三种活性氧（ROS），即单线态氧（O）、超氧阴离子（O）和羟基自由基（•OH），以诱导3,3',5,5'-四甲基联苯胺（TMB）从无色形式转变为蓝色形式（oxTMB）。在还原性HQ介导的oxTMB褪色过程中，由于还原反应速率不同，DM对HQ与异构体（邻苯二酚和间苯二酚）具有显著的选择性，其线性范围为0.2-45μM，检测限低至0.11μM。此外，根据传感过程中的颜色参数变化，利用色度计和智能手机实现现场便捷的HQ检测。此外，DM纳米酶无需辅助设备即可氧化分解HQ。我们相信这项研究为精确检测和去除HQ提供了一个有力的工具。
