Realpe Jimenez Alvaro, Nuñez Diana, Rojas Nancy, Ramirez Yulissa, Acevedo María
Chemical Engineering Department, Particle and Process Modeling Research Group, Universidad de Cartagena, Avenida del Consulado No. 48-152, Cartagena 130015, Colombia.
ACS Omega. 2021 Feb 11;6(7):4932-4938. doi: 10.1021/acsomega.0c05981. eCollection 2021 Feb 23.
TiO nanoparticles were synthesized by green chemistry where organic solvents are replaced by an aqueous extract solution of lemongrass leaves that act as a reducer and growth-stopper agent. The nanoparticles were codoped with N-Fe to modify the absorption range in the electromagnetic spectrum and were characterized by Fourier-transform infrared (FTIR), scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS), and UV-vis/diffuse reflectance spectroscopy (DRS). The modified samples with Fe and N resulted in smaller nanoparticle size values than pure TiO. Similarly, the band-gap energy for doped nanoparticles decreased to 2.22 eV in relation to the value of 3.09 eV for pure TiO, due to the introduction of new energy levels.
通过绿色化学合成了二氧化钛纳米颗粒，其中有机溶剂被柠檬草叶的水提取溶液所取代，该溶液充当还原剂和生长抑制剂。纳米颗粒与氮 - 铁共掺杂以改变电磁光谱中的吸收范围，并通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜/能量色散X射线光谱（SEM/EDS）以及紫外可见/漫反射光谱（DRS）进行表征。与纯二氧化钛相比，铁和氮改性后的样品纳米颗粒尺寸值更小。同样，由于引入了新的能级，掺杂纳米颗粒的带隙能量相对于纯二氧化钛的3.09电子伏特降至2.22电子伏特。
