Liu Zhendong, Ma Zhen
Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University Shanghai 200433 P. R. China.
Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 P. R. China
RSC Adv. 2020 May 20;10(33):19232-19239. doi: 10.1039/d0ra03305g.
Small amounts of Fe(NO) were added to the synthesis mixture prior to the hydrothermal synthesis of BiTiO microspheres. The physicochemical properties of the resulting materials were changed accordingly. The photocatalytic activities of several samples were studied through the photocatalytic degradation of organic pollutants. The samples with a theoretical Fe atomic percentage of 5.9% showed the highest photocatalytic activity among these samples. The main active species in photocatalytic degradation was demonstrated by radical capturing experiments as h. The introduction of a suitable amount of Fe to the photocatalyst can facilitate the separation of electron-hole pairs generated upon light irradiation, inhibit their recombination efficiently, and prominently expand the light absorption region, thus leading to higher photocatalytic activity.
在水热合成BiTiO微球之前，向合成混合物中加入少量的Fe(NO)。所得材料的物理化学性质相应改变。通过有机污染物的光催化降解研究了几个样品的光催化活性。在这些样品中，理论Fe原子百分比为5.9%的样品表现出最高的光催化活性。自由基捕获实验表明，光催化降解中的主要活性物种是h。向光催化剂中引入适量的Fe可以促进光照射时产生的电子-空穴对的分离，有效抑制它们的复合，并显著扩大光吸收区域，从而导致更高的光催化活性。
