Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 237, Issue -, Pages 513-520Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2018.05.074
Keywords
FeOOH QD; g-C3N4; Visible light driving; Photo-Fenton; Organic pollutants
Funding
- National Natural Science Foundation of China [21777097, 21507083, 21777096]
- Key Laboratory of International Joint Laboratory of Resource Chemistry (IJLRC), Ministry of Education
- Opening Project of Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education [LZJ1704]
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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.
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