Abstract

A kind of vanadium-substituted Keggin type polyoxometalate Na₇[CoW₁₁VO₄₀]·16H₂O doped magnetic carbon nitride (CoWV/mCN) have been prepared by simple dipping method. Hybrid CoWV/mCN has been characterized by SEM, EDS and FTIR. The photocatalytic oxidation property has been inspected by degradation of two different antibiotic target solutions under visible light irradiation. The photocatalytic oxidation process discussion of CoWV/mCN composite has been also deduced. Due to introduction of vanadium into the Keggin-type POM skeleton, new V3d/W5d blended LUMO appears, which narrows the energy gap of HOMO and LUMO. Therefore, the visible-light-response ability of the hybrid CoWV/mCN has been improved obviously. Because of its green and magnetic separation property, the hybrid CoWV/mCN has still outstanding photocatalytic activity after four cycles, suggesting its potential in environmental wastewater purification of antibiotic contaminations.

中文翻译：

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钒取代的多金属氧酸盐掺杂的磁性碳氮化物对抗生素的光催化活性。

摘要

通过简单的浸渍法制备了一种钒取代的Keggin型多金属氧酸盐Na ₇ [CoW ₁₁ VO ₄₀ ]·16H ₂ O掺杂的磁性碳氮化物（CoWV / mCN）。混合CoWV / mCN已通过SEM，EDS和FTIR进行了表征。通过在可见光照射下降解两种不同的抗生素目标溶液来检查光催化氧化性能。还推导了CoWV / mCN复合材料的光催化氧化工艺讨论。由于在Keggin型POM骨架中引入了钒，因此新的V3 d / W5 d出现了混合LUMO，这缩小了HOMO和LUMO的能隙。因此，混合CoWV / mCN的可见光响应能力得到了明显提高。由于其绿色和磁性分离特性，杂化的CoWV / mCN在四个循环后仍具有出色的光催化活性，表明其在环境废水中净化抗生素污染的潜力。