Three different visible-light photocatalysts (hematite (α-Fe2O3), bismuth vanadate (BiVO4) and Mo-doped bismuth vanadate (BiMoVO4)) deposited on transparent fluorine-doped SnO2 (FTO) were evaluated for the solar-driven photoelectrocatalytic treatment of emerging pollutants. BiMoVO4 was found to be the most effective photoanode, yielding the fastest degradation rate constant and highest mineralization efficiency using phenol as the oxidation probe. The BiMoVO4 photoanode was then used to degrade the herbicide simazine in a photoelectrolytic cell combining photoelectrocatalysis (PEC) with photoelectron-Fenton (PEF) under solar light (SPEC-SPEC). Total simazine removal was achieved within 1 min of treatment (kapp = 4.21 min−1) at the optimum electrode potential of 2.5 V vs Ag/AgCl, with complete TOC removal in 2 h. The analysis of anionic species in solution during treatment showed that most of the nitrogen heteroatoms in the simazine structure were converted into NO3− following •OH addition to organic N. This innovative process combining BiMoVO4-PEC with PEF using solar light as a sustainable source of energy (SPEC-SPEF) achieved the highest degradation/mineralization efficiency ever reported for simazine treatment. Besides, this is the first work reporting the photo(electrochemical) degradation of this toxic herbicide.
2021年3月16日Chemosphere ( IF 5.778 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.chemosphere.2021.130138 Jianxiong Xu, Hugo Olvera-Vargas, Felix Yee Hao Teo,...用于太阳能光电催化的可见光光催化剂与太阳能光电芬顿的比较：在农药辛嗪降解中的应用; Jianxiong Xu, Hugo Olvera-Vargas, Felix Yee Hao Teo, Olivier Lefebvre; Chemosphere; Chemosphere; X-MOL三种不同的可见光的光催化剂（赤铁矿（α-的Fe 2 ö 3），钒酸铋（BiVO 4）和Mo-掺杂钒酸铋（BiMoVO 4））沉积在透明氟掺杂的SnO 2（FTO）进行评价的太阳能驱动的光电催化处理新兴污染物。发现BiMoVO 4是最有效的光电阳极，使用苯酚作为氧化探针可产生最快的降解速率常数和最高的矿化效率。BiMoVO 4然后，在太阳光下（SPEC-SPEC），将光阳极与光电子-芬顿（PEF）和光电子催化（PEC）结合使用，以在光电解池中降解除草剂simazine。在2.5 V vs Ag / AgCl的最佳电极电势下，在处理1分钟内（k app = 4.21 min -1）即可完全去除西马嗪，并在2小时内完全去除TOC。在治疗过程中溶液阴离子物质的分析表明，大多数在西玛津结构中的氮的杂原子的被转换成NO 3 -以下• OH除了有机N.这种创新的工艺相结合BiMoVO 4-采用PEF的PEC使用太阳光作为可持续能源（SPEC-SPEF）达到了有史以来使用过simazine处理的最高降解/矿化效率。此外，这是报道这种有毒除草剂的光（电化学）降解的第一项工作。用于太阳能光电催化的可见光光催化剂与太阳能光电芬顿的比较：在农药辛嗪降解中的应用,Chemosphere
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