Gul Anadil, Ullah Raza, Sun Jihong, Munir Tallat, Bai Shiyang
Beijing Key Laboratory for Green Catalysis and Separation, Department of Environmental and Chemical Engineering, Beijing University of Technology Beijing 100124 P. R. China
RSC Adv. 2021 May 18;11(29):17849-17859. doi: 10.1039/d1ra02269e. eCollection 2021 May 13.
TiO-supported clinoptilolite (TiO/CP) was synthesized in the presence of F ions. Various characterizations demonstrated that the particle size of loaded TiO increased linearly with an increase in the temperature and concentration of F ions. In particular, the additive F ions were favored to produce the mutually independent co-exposed {001} and {101} facets of loaded TiO, while TiO/CPs synthesized in the absence of F ions were dominated by the thermodynamically stable {101} facet. As photocatalysts for the removal of crystal violet or methyl orange dyes under UV-irradiation in aqueous solutions, TiO/CPs (ACP6) synthesized in the presence of F ions significantly improved the degradation efficiency, as compared to ACP3 obtained in the absence of F ions. These results elucidated that the highly energetic {001} exposed facet, large particle size and fine dispersion of loaded TiO in TiO/CP accounts for its best photocatalytic performance. The effected mechanism of operational parameters on the degradation performances is proposed.
在氟离子存在的情况下合成了负载TiO的斜发沸石（TiO/CP）。各种表征表明，负载TiO的粒径随氟离子温度和浓度的增加而线性增加。特别地，添加的氟离子有利于产生负载TiO相互独立的共暴露{001}和{101}晶面，而在没有氟离子的情况下合成的TiO/CP则以热力学稳定的{101}晶面为主。作为在水溶液中紫外光照射下去除结晶紫或甲基橙染料的光催化剂，与在没有氟离子的情况下获得的ACP3相比，在氟离子存在下合成的TiO/CP（ACP6）显著提高了降解效率。这些结果表明，TiO/CP中负载TiO的高能{001}暴露晶面、大粒径和良好分散性是其最佳光催化性能的原因。提出了操作参数对降解性能的影响机制。
