CaCu3Ti4O12: An Efficient Catalyst for Ibuprofen Degradation by Activation of Peroxymonosulfate under Visible Light Irradiation
CaCu3Ti4O12: An Efficient Catalyst for Ibuprofen Degradation by Activation of Peroxymonosulfate under Visible Light Irradiation
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CaCu3Ti4O12：可见光照射下活化过一硫酸盐降解布洛芬的高效催化剂
DOI：
10.1007/s10311-018-0776-x
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
朱云庆
中科院分区：
文献类型：
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作者：
朱云庆
Contamination of waters by pharmaceuticals is a major health issue. Therefore, there is a need for efficient techniques to remove pharmaceutical pollutants. Here, a photo-assisted fenton-like method based on sulfate radicals was tested using CaCu3Ti4O12with different morphologies as catalyst. Sintering of CaCu3Ti4O12at 775 °C for 6 h produced cubic structures with sizes from 2 to 5 μm, whereas sintering for 14 h produced microfibers, according to scanning electron microscopy. The highest electron paramagnetic resonance signal was observed for 6-h sintering. We evaluated the catalytic efficiency of CaCu3Ti4O12for ibuprofen degradation with peroxymonosulfate under visible light. Results show that CaCu3Ti4O12and 0.5 mM peroxymonosulfate under visible-light irradiation induced 91.8% removal of ibuprofen in 60 min. The Cu+vacancy on the surface of CaCu3Ti4O12is essential to activate the sulfate radicals by forming a Cu+–Cu2+redox couple, which led to the rapid and efficient removal of ibuprofen.
