1. Yunnan Univ, Sch Ecol & Environm Sci, Inst Ecol Res & Pollut Control Plateau Lakes, Kunming 650504, Yunnan, Peoples R China
2. Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China
3. Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China
4. Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China
5. Zhejiang Ocean Univ, Marine Sci & Technol Coll, Natl Engn Res Ctr Marine Aquaculture, Zhoushan 316004, Peoples R China
6. Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
折叠
Abstract
Effective removal of pollutants that affect human health and ecosystem stability is a crucial challenge. Here, the structural confinement engineering strategy realizes the effective anchoring of atomically dispersed Co in the Bdoped-CN network (BCN) (BCN/CoN[2 +2]). The advanced oxidation process (AOP) involved BCN/CoN[2 + 2] has realized the rapid and complete degradation to tetracycline (TCL), the removal of approximately 80% and 100% of tetracycline was achieved in 5 min and 30 min, respectively. The AOP with BCN/CoN[2 + 2] can degrade TCL over a wide pH; in addition, BCN/CoN[2 + 2] has the ability to efficiently degrade common pollutants, and its catalytic activity did not decay even if it was used repeated five times. Electron paramagnetic resonance (EPR) spectroscopy shows that BCN/CoN[2 + 2] drives the complete conversion of peroxymonosulfate (PMS) to 1O2, and density functional theory calculations demonstrate that the base for the conversion of PMS to 1O2 is from the isolated state of the active site Co.
Key words
Environmental catalysis/Advanced oxidation process/Singlet oxygen/Single atom Co/Peroxymonosulfate
NSTL
Elsevier