CuO- and Ag2O-decorated g-C3N4 photocatalysts were prepared by appropriate chemical modification of carbon nitride nanosheets produced from programmed pyrolysis of urea. After comprehensive characterization by powder X-ray diffraction, diffuse reflectance spectroscopy, Fourier transform–infrared spectroscopy, scanning electron microscopy, and Brunauer–Emmett–Teller analysis methods, their photocatalytic performances were examined for the removal of Acid Blue 92 azo dye, as a typical wastewater component from the textile industry. The X-ray diffraction patterns confirmed the presence of CuO and Ag2O nanoparticles on the surface of the sheets. In addition, diffuse reflectance spectra indicated a considerable reduction of the band gap of pure C3N4 by modification. The photoreaction was discussed mechanistically and the best operational parameters were found to achieve the highest efficiency under visible light.

中文翻译：

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[Cu-Ag2]O-C3N4纳米框架用于有效光降解废水

CuO 和 Ag2O 装饰的 g-C3N4 光催化剂是通过对尿素程序热解产生的氮化碳纳米片进行适当的化学改性来制备的。通过粉末 X 射线衍射、漫反射光谱、傅里叶变换-红外光谱、扫描电子显微镜和布鲁诺-埃米特-泰勒分析方法综合表征后，研究了它们去除酸性蓝 92 偶氮染料的光催化性能。来自纺织工业的典型废水成分。X 射线衍射图证实了片材表面上存在 CuO 和 Ag2O 纳米颗粒。此外，漫反射光谱表明，通过改性，纯 C3N4 的带隙显着减小。