Keeping the high efficiency in designing photocatalysts in view, the present work was aimed at the development of a heterojunction photocatalyst with boosted efficiencies, both for degradation of organic contaminants and bacterial deactivation. Heterojunction nanocomposites of g-CN (GCN) and CuO (CuO /GCN-5 %, CuO /GCN-15 %, CuO/GCN-25 %, and CuO /GCN-50 %) were prepared by hydrothermal method and their photocatalytic performance was evaluated. XPS result confirms the surface chemical composition of nanocomposite and consistent with EDX analysis. The BET studies of CuO/GCN −25 % nanocomposite reveals the larger specific surface area (128.10 m/g), compared to intact CuO, which facilitates more active sites on the surface. The optical bandgap energy (2.39 eV-2.58 eV) is tuned towards the visible region by loading g-CN in marigold-like CuO. The efficient charge transfer betwixt marigold-like CuO and g-CN was demonstrated in PL, CV, and EIS analysis. The CuO/GCN-25 % nanocomposite exhibits superior photocatalytic activity towards Aniline blue dye (86.4 %) and β-lactam antibiotic amoxicillin (79 %) under 100 min of sunlight irradiation. HPLC analysis further confirmed the degradation and disintegration of Amoxicillin. The probable photocatalytic mechanism was proposed and tested through a radical scavenger experiment. It was found that OH radicals significantly take part in the photodegradation. In addition, the bactericidal activities of CuO/GCN-25 % nanocomposite was determined. The highest bactericidal activity was observed for Bacillus subtilis (26 mm). Hence, the marigold-like CuO/GCN-25 % nanocomposite is a feasible material for the degradation of dyeing and pharmaceutical industrial effluents as well as bacterial growth inhibition.

中文翻译：

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使用类万寿菊 Cu2O 修饰的 g-C3N4 纳米复合材料促进太阳能驱动的有机污染物光催化降解和细菌灭活


考虑到设计光催化剂的高效率，目前的工作旨在开发一种具有更高效率的异质结光催化剂，无论是有机污染物的降解还是细菌的灭活。水热法制备g-CN（GCN）和CuO（CuO /GCN-5%、CuO/GCN-15%、CuO/GCN-25%、CuO/GCN-50%）异质结纳米复合材料及其光催化性能被评价。 XPS结果证实了纳米复合材料的表面化学成分，并与EDX分析一致。 CuO/GCN -25% 纳米复合材料的 BET 研究表明，与完整的 CuO 相比，其比表面积更大 (128.10 m/g)，这有利于表面上有更多的活性位点。通过在万寿菊状 CuO 中负载 g-CN，将光学带隙能量 (2.39 eV-2.58 eV) 调整至可见光区域。 PL、CV 和 EIS 分析证明了万寿菊状 CuO 和 g-CN 之间的有效电荷转移。 CuO/GCN-25% 纳米复合材料在 100 分钟的阳光照射下对苯胺蓝染料 (86.4%) 和 β-内酰胺抗生素阿莫西林 (79%) 表现出优异的光催化活性。 HPLC分析进一步证实了阿莫西林的降解和崩解。通过自由基清除剂实验提出并测试了可能的光催化机制。结果发现，OH自由基显着参与光降解。此外，还测定了 CuO/GCN-25% 纳米复合材料的杀菌活性。枯草芽孢杆菌 (26 mm) 的杀菌活性最高。因此，类万寿菊 CuO/GCN-25% 纳米复合材料是一种用于降解染色和制药工业废水以及抑制细菌生长的可行材料。