ZIF-67纳米片介导的luminol化学发光及水中过氧化氢的测定

ZIF-67 Nanosheets-Mediated Luminol Chemiluminescence for Sensitively Sensing Hydrogen Peroxide in Water Samples

发现沸石咪唑酯类骨架结构材料ZIF-67纳米片能高效催化luminol-H 2O 2体系的化学发光,发光信号可增大至原来的200倍。探讨了ZIF-67纳米片对luminol-H 2O 2体系的催化可能的影响因素,包括luminol溶液的pH、luminol和ZIF-67纳米片的浓度等,研究了体系可能的化学发光反应机理。评估了方法的实际可行性,对过氧化氢测定的线性范围在0.1~100 nmol/L之间,检出限为0.02 nmol/L,并成功用于雨水中过氧化氢的测定,加标回收率96.1%~101.1%。结果表明,ZIF-67纳米片在化学发光领域具有潜在的应用前景。

The nanosheets of zeolite imidazole framework ZIF-67 exhibited pronounced catalytic activity in enhancing the chemiluminescence(CL)of the luminol-H_(2)O_(2) system,and the CL signal was increased by 200 times.Additionally,influence factors such as pH,luminol concentration,and ZIF-67 NSs concentration on the catalytic performance of ZIF-67 NSs were investigated,and the possible CL reaction mechanism was explored.In order to evaluate the practical feasibility of the method,the linear range and detection limit of hydrogen peroxide were determined,and the linear range was found to be between 0.1~100 nmol/L,with a detection limit of 0.02 nmol/L.The method has been successfully applied for the detection of hydrogen peroxide in rain water samples with acceptable recoveries ranging from 96.1% to 101.1%.These results indicated that ZIF-67 NSs had significant potential application prospects in the field of CL.