Martin Marcela V, Ipiña Adriana, Villabrille Paula I, Rosso Janina A
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CONICET, Universidad Nacional de La Plata (UNLP), 1900, La Plata, Argentina.
Centro de Investigación y Desarrollo en Ciencias Aplicadas (CINDECA), CONICET, Universidad Nacional de La Plata (UNLP), 1900, La Plata, Argentina.
Environ Sci Pollut Res Int. 2017 Mar;24(7):6013-6021. doi: 10.1007/s11356-016-6258-4. Epub 2016 Feb 15.
The degradation of phenol was used as a model reaction to investigate the photocatalytic properties of cerium-doped (0.1 nominal atomic percent) TiO catalysts in the presence and in the absence of oxidants: persulfate (PS) or hydrogen peroxide (HP). Experiments were performed in batch reactors using either artificial light (ultraviolet or visible) or solar exposure during spring-summer seasons in La Plata City (34.90° S, 57.92° W, 15 MASL). The formation of hydroquinone, catechol, and p-benzoquinone was observed in all the experiments. Additionally, for the experiments with PS (with or without catalyst), evidence of the formation of dimers and trimers was found. Total degradation of phenol (250 μM) was achieved with doped material and 7 mM of PS (two doses) after 3 h of solar exposure (H = 2.9 ± 0.6 10 J m).
以苯酚降解作为模型反应，研究了铈掺杂（名义原子百分比为0.1%）的TiO催化剂在有和没有氧化剂（过硫酸盐（PS）或过氧化氢（HP））存在时的光催化性能。实验在间歇式反应器中进行，使用人工光源（紫外线或可见光），或在拉普拉塔市（南纬34.90°，西经57.92°，海拔15米）的春夏季进行阳光照射。在所有实验中均观察到对苯二酚、邻苯二酚和对苯醌的生成。此外，对于添加PS的实验（有或没有催化剂），发现了二聚体和三聚体生成的证据。在阳光照射3小时后（H = 2.9±0.6×10 J m），掺杂材料与7 mM的PS（分两剂添加）实现了苯酚（250 μM）的完全降解。
