Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China.
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China.
J Hazard Mater. 2020 Apr 15;388:121754. doi: 10.1016/j.jhazmat.2019.121754. Epub 2019 Nov 25.
Copper modified carbon nitride (CuCN) was prepared by a hydrothermal self-assembly reaction and following high temperature thermal polymerization process. Finally, the sample exhibits uniform one-dimensional tubular structure. Interestingly, the separation efficiency of electron-hole pair is improved, and more catalytic active sites are exposed due to the special hollow structure. Meanwhile, the presence of copper element narrows its band gap, leading to the enhancement of photocatalytic degradation performance under simulated sunlight. In addition, the effect of CuCN on dehydrogenase activity of activated sludge was determined by TTC reduction method. After adding CuCN-2, the activity of activated sludge reached 0.134 μmol g min, which indicated that the prepared CuCN-2 had good biocompatibility. It is suitable for both photocatalytic process and activated sludge treatment process. Therefore, the combination of photocatalytic technology and activated sludge process can further completely degrade organic pollutants. We found that CuCN could protect the survival and growth of microorganisms in activated sludge, so that the degradation efficiency of CuCN to nitrobenzene could reach 94.4 %. Therefore, CuCN has broad application prospects in photocatalytic-activated sludge combined treatment.
铜改性氮化碳（CuCN）通过水热自组装反应和随后的高温热聚合过程制备。最后，样品呈现出均匀的一维管状结构。有趣的是，由于特殊的空心结构，电子-空穴对的分离效率得到提高，并且暴露了更多的催化活性位点。同时，铜元素的存在缩小了其带隙，导致在模拟太阳光下光催化降解性能增强。此外，通过 TTC 还原法测定了 CuCN 对活性污泥脱氢酶活性的影响。添加 CuCN-2 后，活性污泥的活性达到 0.134μmol·g·min，表明制备的 CuCN-2 具有良好的生物相容性。它既适用于光催化过程，也适用于活性污泥处理过程。因此，将光催化技术与活性污泥工艺相结合可以进一步完全降解有机污染物。我们发现 CuCN 可以保护活性污泥中微生物的生存和生长，使 CuCN 对硝基苯的降解效率达到 94.4%。因此，CuCN 在光催化-活性污泥联合处理中具有广阔的应用前景。
