Yuqi Wan, Ke gao, Zhi-Quan Pan, Tianshuo Zhao, Qingrong Cheng
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引用次数: 0
摘要
抗生素和各种污染物的残留已成为亟待解决的环境污染问题。在这项研究中,我们通过在介孔磷酸盐-二氧化钛珠上自组装膦酸盐基 MOFs,构建了一种 S 型 P-TiO2@Zn-MOF 异质结。与单体相比,P-TiO2@Zn-MOF2.0 异质结在模拟阳光下光氧化降解环丙沙星(60 分钟内 97.2%)和四环素(TC)(100 分钟内 94.5%)以及光还原六价铬(60 分钟内 92.7%)方面表现出明显更高的光催化活性。实验结果和计算显示,光生载流子在 P-TiO2@Zn-MOF2.0 S 型异质结界面上得到了有效分离和转移,从而形成了高活性的超氧化物和羟基自由基。此外,在pH值呈强酸性的实际电镀工业废水中进行循环测试后,这种混合体仍能保持出色的六(六)铬光还原性能。
Constructing TiO2@MOF S-scheme heterojunctions for enhanced photocatalytic degradation of antibiotic and Cr(VI) photoreduction
The residue of antibiotics and various pollutants has led to urgent issue in environmental pollution. In this study, we constructed an S-scheme P-TiO2@Zn-MOF heterojunction by self-assembling phosphonate-based MOFs on mesoporous phosphate-TiO2 beads. Compared to the monomers, P-TiO2@Zn-MOF2.0 heterojunction exhibits significantly higher photocatalytic activity for the photo-oxidative degradation of ciprofloxacin (97.2% in 60 min) and tetracyclic (TC) (94.5% in 100 min), and the photo-reduction of Cr(VI) (92.7% in 60 min) under simulated sunlight. Experimental results and calculations revealed the effective separation and transfer of photogenerated carriers at the P-TiO2@Zn-MOF2.0 S-scheme heterojunction interface, enabling formation of highly active superoxide and hydroxyl radicals. Furthermore, the hybrid maintained excellent Cr(VI) photoreduction performance after recycling tests in actual electroplating industry wastewater at a strongly acidic pH.
期刊介绍:
Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.