Yang Sena, Lee Hangil
Center for Nano Characterization, Korea Research Institute of Standards and Science, Daejeon, 305-400, Republic of Korea.
Department of Chemistry, Sookmyung Women's University, Seoul, 140-742, Republic of Korea.
Nanoscale Res Lett. 2017 Nov 3;12(1):582. doi: 10.1186/s11671-017-2355-7.
The modified TiO nanoparticles (NPs) to enhance their catalytic activities by doping them with the five transition metals (Cr, Mn, Fe, Co, and Ni) have been investigated using various surface analysis techniques such as scanning electron microscopy (SEM), Raman spectroscopy, scanning transmission X-ray microscopy (STXM), and high-resolution photoemission spectroscopy (HRPES). To compare catalytic activities of these transition metal-doped TiO nanoparticles (TM-TiO) with those of TiO NPs, we monitored their performances in the catalytic oxidation of 2-aminothiophenol (2-ATP) by using HRPES and on the oxidation of 2-ATP in aqueous solution by taking electrochemistry (EC) measurements. As a result, we clearly investigate that the increased defect structures induced by the doped transition metal are closely correlated with the enhancement of catalytic activities of TiO NPs and confirm that Fe- and Co-doped TiO NPs can act as efficient catalysts.
通过用五种过渡金属（铬、锰、铁、钴和镍）对改性二氧化钛纳米颗粒（NPs）进行掺杂来提高其催化活性，已使用各种表面分析技术进行了研究，如扫描电子显微镜（SEM）、拉曼光谱、扫描透射X射线显微镜（STXM）和高分辨率光电子能谱（HRPES）。为了将这些过渡金属掺杂的二氧化钛纳米颗粒（TM-TiO）与二氧化钛纳米颗粒的催化活性进行比较，我们通过使用HRPES监测它们在2-氨基苯硫酚（2-ATP）催化氧化中的性能，并通过电化学（EC）测量来监测其在水溶液中对2-ATP的氧化性能。结果，我们清楚地研究了由掺杂过渡金属诱导的缺陷结构增加与二氧化钛纳米颗粒催化活性的增强密切相关，并证实铁和钴掺杂的二氧化钛纳米颗粒可以作为高效催化剂。
