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FeOOH quantum dots coupled g-C3N4 for visible light driving photo- Fenton degradation of organic pollutants
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2018-05-31 , DOI: 10.1016/j.apcatb.2018.05.074
Xufang Qian , Yunwen Wu , Miao Kan , Mengyuan Fang , Dongting Yue , Jun Zeng , Yixin Zhao

Amorphous FeOOH quantum dots (QDs) were coupled with polymeric photocatalysts g-C3N4 which was developed as a visible light driving photo-Fenton catalyst. Highly dispersed FeOOH QDs anchored on g-C3N4 showed enhanced visible light driving photo-Fenton degradation of MO and phenol than that of pure g-C3N4 and mechanical mixture (FeOOH&g-C3N4). The mineralization efficiency on FeOOH/g-C3N4 is nearly 7 times higher than that on pure g-C3N4 which shows great potential in treatment of recalcitrant organic pollutants. XPS results indicated that extraneous carbon species were present in FeOOH/g-C3N4 which should be responsible for the electron transfer between FeOOH and g-C3N4. Based on the radical capture, electrochemical experiments and photoluminescence (PL) decay characterizations, we proposed that visible light excited the g-C3N4 to produce e/h+ pairs and the e participated the cycling of Fe(II)/Fe(III). The FeOOH/g-C3N4 showed high recycling stability without Fe leaching due to the interaction of FeOOH QDs and carbon species. The FeOOH QDs coupled g-C3N4 is a promising visible light driving photo-Fenton catalyst for organic pollutants treatment.



中文翻译:

FeOOH量子点与g -C 3 N 4耦合,用于可见光驱动光-Fenton降解有机污染物

非晶态FeOOH量子点(QDs)与聚合物光催化剂g -C 3 N 4耦合,后者被开发为可见光驱动的光芬顿催化剂。固定在g -C 3 N 4上的高度分散的FeOOH QD表现出比纯g -C 3 N 4和机械混合物(FeOOH&g -C 3 N 4)更高的可见光驱动MO和苯酚的光芬顿降解。FeOOH / g -C 3 N 4的矿化效率是纯g的矿化效率的近7倍-C 3 N 4,在处理顽固有机污染物方面显示出巨大潜力。XPS结果表明,FeOOH / g -C 3 N 4中存在外来碳物种,这应该是FeOOH与g- C 3 N 4之间电子转移的原因。基于所述自由基捕获,电化学实验和光致发光(PL)衰变表征,我们提出了激发的可见光-C 3 Ñ 4以产生ë - / H +对和电子-参与了Fe(II)/ Fe(III)的循环。FeOOH / g -C 3 N 4由于FeOOH QD和碳原子之间的相互作用而显示出高的回收稳定性,而没有Fe的浸出。FeOOH QDs与g -C 3 N 4偶联是一种有前途的可见光驱动光芬顿催化剂,用于有机污染物的处理。

更新日期:2018-05-31
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