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Photodegradation of fluazaindolizine in aqueous solution with graphitic carbon nitride nanosheets under simulated sunlight illumination
Ecotoxicology and Environmental Safety ( IF 6.8 ) Pub Date : 2018-12-01 , DOI: 10.1016/j.ecoenv.2018.11.019
Nannan Pang , Hongfang Lin , Jiye Hu

The photodegradation of fluazaindolizine (FZDL) under simulated sunlight irradiation was accelerated by the catalysis of graphitic carbon nitride (g-C3N4). Under optimum conditions, such as 5 mg of amount and dispersion, the photodegradation half-life was dramatically enhanced to 2.7 h. More importantly, the pathway of degradation by g-C3N4 was different from both direct photolysis and the catalysis by titanium oxide, with particular negative ions of m/z 221 and 195, corresponding to the cleavage of sulfamide bond and the ring opening of imidazole, respectively. In addition, hydroxyl and superoxide radicals played important roles in photodegradation. The results enriched not only the study of FZDL photodegradation but also the application of g-C3N4. It also suggested the possibility of the water purification by photodegradation for pesticide removal in real life.



中文翻译:

石墨氮化碳纳米片在模拟阳光照射下对氟氮吲哚嗪的水溶液光降解

石墨氮化碳(gC 3 N 4)的催化作用促进了在模拟日光照射下氟氮嗪(FZDL)的光降解。在最佳条件下(例如5 mg的量和分散体),光降解半衰期显着提高至2.7 h。更重要的是,gC 3 N 4的降解途径与直接光解和氧化钛催化均不同,其中特定的负离子为m / z221和195,分别对应于磺酰胺键的裂解和咪唑的开环。另外,羟基和超氧化物自由基在光降解中也起重要作用。结果不仅丰富了FZDL光降解的研究,而且丰富了gC 3 N 4的应用。还提出了在现实生活中通过光降解净化水以去除农药的可能性。

更新日期:2018-12-01
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