The aim of this work is to evaluate the use of phenalenone (PN) grafted to sand in the photodegradation of tebuconazole (TEB). PN was covalently attached to sand via click reactions between functionalized sand and PN derivatives. The photodegradation study was conducted in an annular reactor equipped with immersed UV and visible lamps. In the first step the photodegradation of TEB was studied in presence of free PN. The influence of the molar ratio = PN/TEB was investigated; a maximal effect was observed with R close to 769; beyond this value a shielding effect appeared. The use and the lifetime of the sand-bound PN were studied and the photodegradation mechanism was investigated. Covalent binding of photosensitizer to sand resulted in a 80 nm red shift of the PN absorption band in the visible region along with an important increase in degradative efficiency. PN-Sand was more stable under visible irradiation. The main mechanism was the type II with some contribution of type I.

这项工作的目的是评估在戊丁康唑（TEB）的光降解中接枝到沙子上的菲勒酮（PN）的用途。PN通过官能化的沙子和PN衍生物之间的点击反应共价附着到沙子上。光降解研究是在配备有浸入式紫外线灯和可见灯的环形反应器中进行的。在第一步中，研究了在游离PN存在下TEB的光降解。研究了摩尔比= PN / TEB的影响；当R接近769时，观察到最大效果；超过该值，出现屏蔽效果。研究了束缚型PN的使用和寿命，并研究了其光降解机理。光敏剂与沙子的共价结合导致可见光区域的PN吸收带发生80 nm红移，同时降解效率大大提高。PN-沙在可见光下更稳定。主要机制是II型，对I型有所贡献。