Abstract：
In this study, we investigated the degradation of the flame retardant tetrabromobisphenol A (TBBPA) using platinized tungsten oxide (Pt/WO3), synthesized via a simple photodeposition method, under visible light. The results of degradation experiments show a significant enhancement in TBBPA degradation upon surface platinization of WO3, with the degradation rate increasing by 13.4 times compared to bare WO3. The presence of Pt on the WO3 surface stores conduction band electrons, which facilitates the two-electron reduction of oxygen and enhances the production of valence band holes (hVB+) and hydroxyl radicals (●OH). Both hVB+ and ●OH are significantly involved in the degradation of TBBPA in the visible light-irradiated Pt/WO3 system. This was verified through fluorescence spectroscopy employing coumarin as a chemical probe and oxidizing species-quenching experiments. The analysis of degradation products and their toxicity assessment demonstrate that the toxicity of TBBPA-contaminated water is significantly reduced after Pt/WO3 photocatalysis. The degradation rate of TBBPA increased with increasing Pt/WO3 dosage, reached an optimum at a Pt content of 0.5 wt%, but decreased with increasing TBBPA concentration. The decrease in degradation efficiency of Pt/WO3 was minor, both in the presence of various anions and after repeated use. This study proposes that Pt/WO3 is a viable photocatalyst for the degradation of TBBPA in water under visible light.
摘要：
在这项研究中,我们研究了使用铂化氧化钨（Pt/WO3）对阻燃剂四溴双酚A（TBBPA）的降解，通过简单的光沉积方法合成，在可见光下。降解实验的结果表明，在WO3的表面铂化后，TBBPA的降解显着增强，与裸露的WO3相比，降解速率提高了13.4倍。WO3表面上Pt的存在存储导带电子，这促进了氧的双电子还原，并增强了价带空穴（hVB）和羟基自由基（●OH）的产生。在可见光照射的Pt/WO3系统中，hVB和●OH均显着参与TBBPA的降解。通过使用香豆素作为化学探针的荧光光谱法和氧化物种猝灭实验来验证这一点。降解产物的分析及其毒性评估表明，在Pt/WO3光催化作用后，TBBPA污染的水的毒性显着降低。TBBPA的降解率随着Pt/WO3用量的增加而增加,在Pt含量为0.5wt％时达到最佳状态，但随着TBBPA浓度的增加而降低。Pt/WO3的降解效率下降很小，在各种阴离子的存在和重复使用后。本研讨提出Pt/WO3是可见光下降解水中TBBPA的可行光催化剂。
