Li Mei, Zhang Ling, Liu Wei, Jin Yan, Li Baoxin
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China.
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China.
Talanta. 2025 Jan 1;282:126969. doi: 10.1016/j.talanta.2024.126969. Epub 2024 Sep 27.
Zinc oxide (ZnO) nanoparticles with surface oxygen vacancy (O) was found to catalyze the colorimetric reaction of 3,3',5,5'-tetramethylbenzidine (TMB)-HO, and the absorbance of this TMB-HO-ZnO system was strongly dependent the O concentration on surface of ZnO. By taking advantage of this phenomenon, one colorimetric method was proposed for quantifying surface O in ZnO. The surface O amount obtained through this colorimetric method matched well with that obtained through X-ray photoelectron spectroscopy (XPS). This colorimetric method doesn't need any advanced instruments, and can be completed in any an ordinary laboratory. This colorimetric method for detecting surface O amount was simple, rapid (about 15 min) and low-cost.
发现具有表面氧空位（O）的氧化锌（ZnO）纳米颗粒可催化3,3',5,5'-四甲基联苯胺（TMB）-H₂O₂的比色反应，且该TMB-H₂O₂-ZnO体系的吸光度强烈依赖于ZnO表面的O浓度。利用这一现象，提出了一种用于定量ZnO中表面O的比色方法。通过该比色法获得的表面O含量与通过X射线光电子能谱（XPS）获得的结果吻合良好。该比色法无需任何先进仪器，在任何普通实验室均可完成。这种检测表面O含量的比色法简单、快速（约15分钟）且成本低。
