Graphitic carbon nitride (g-C₃N₄) supported cadmium carbonate (CdCO₃) as an organic–inorganic hybrid nanophotocatalyst was realised by an in situ microwave heating method. The hybrid composite retains the structure of each component, which was verified by p-XRD, FT-IR and solid state ¹³C-NMR analysis. The as-prepared hybrid g-C₃N₄/CdCO₃ composites were evaluated as a photocatalyst towards the degradation of indigo carmine (IC) dye and inactivation of the Gram negative E. coli pathogen. In this composite, the wide band gap CdCO₃ acts as an electron accepting platform from g-C₃N₄ and facilitates the subsequent photocatalytic reaction. The optimized hybrid g-C₃N₄/CdCO₃-90 photocatalyst exhibits four-fold increase in the degradation of IC dye compared to pristine g-C₃N₄ and almost a complete mineralization of the dye occurs after 180 min of irradiation. Besides, this photocatalyst completely inhibits the growth of E. coli bacteria within 45 min of visible light irradiation. The enrichment in the photoactivity of CdCO₃ decorated g-C₃N₄ is ascribed to the combined effects of improved visible light absorption, enhanced dye adsorption and facile separation of electron–hole pairs as evidenced by electrochemical impedance spectroscopy (EIS) measurements. The present work may provide valuable information and insights into the microwave assisted synthesis of g-C₃N₄ hybrid composites and may permit a better comprehension of future advancements in high performance materials for environmental remediation applications.

中文翻译：

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微波辅助用CdCO ₃纳米粒子对gC ₃ N ₄表面进行原位装饰，用于可见光驱动的光催化†

通过原位微波加热方法实现了石墨化氮化碳（gC ₃ N ₄）负载的碳酸镉（CdCO ₃）作为有机-无机杂化纳米光催化剂。杂化复合材料保留了每种组分的结构，这已通过p-XRD，FT-IR和固态¹³ C-NMR分析得到了验证。评价了所制备的杂化gC ₃ N ₄ / CdCO ₃复合材料作为光催化剂对靛蓝胭脂红（IC）染料的降解和革兰氏阴性大肠杆菌病原体的灭活的作用。在该复合材料中，宽带隙CdCO ₃充当了gC的电子接受平台₃ N ₄并促进随后的光催化反应。与原始gC ₃ N ₄相比，优化的杂化gC ₃ N ₄ / CdCO ₃ -90光催化剂在IC染料的降解中表现出四倍的增加，并且在照射180分钟后几乎完全发生了矿化。此外，这种光催化剂在可见光照射后的45分钟内完全抑制了大肠杆菌的生长。CdCO ₃装饰的gC ₃ N ₄的光活性富集归因于改善的可见光吸收，增强的染料吸附和电子-空穴对的轻松分离的综合效果，如电化学阻抗谱（EIS）测量所证明的。本工作可以为gC ₃ N ₄杂化复合材料的微波辅助合成提供有价值的信息和见识，并且可以更好地理解用于环境修复应用的高性能材料的未来发展。