Herein, a novel composite of g-C₃N₄ and silver nanoparticles(g-C₃N₄@Ag) with enhanced bifunctional catalytic activity through chemical etching is reported. A kind of g-C₃N₄@Ag composite by one-pot route, then treated the product with sodium borohydride (NaBH₄) solution for a certain time is first synthesized. The property and morphology of the g-C₃N₄@Ag composite changed greatly after the treatment. Compared with the pristine g-C₃N₄@Ag composite, the NaBH₄-etching endowed g-C₃N₄@Ag composite (RACN) with smoother two-dimensional plane structure, as well as an extension of the conjugate system which originating from the stronger chemical connection between the Ag nanoparticles and g-C₃N₄. Furthermore, research results indicated that the RACN showed superior broad-spectrum catalytic performance for the reduction of aromatic nitro compounds, and the catalytic efficiency of the RACN is enhanced dozens of times by the treatment. Moreover, the photocatalytic activity of the RACN is also greatly improved. This discovery provides an efficient and facile method toward the enhancement of catalytic activity of semiconductor and metal nanoparticle composites by chemical etching.

中文翻译：

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NaBH4蚀刻增强G-C3N4@Ag复合材料的双功能催化性能

在此，报道了一种新型的gC ₃ N ₄和银纳米粒子复合物（gC ₃ N ₄ @Ag），通过化学蚀刻增强了双功能催化活性。首先通过一锅法合成了一种gC ₃ N _{4 @Ag复合材料，然后用硼氢化钠(NaBH 4} )溶液处理一定时间。处理后gC ₃ N ₄ @Ag复合材料的性能和形貌发生了较大变化。与原始gC ₃ N ₄ @Ag复合材料相比，NaBH ₄蚀刻赋予gC ₃ N ₄ @Ag复合材料（RACN）更平滑的二维平面结构，以及源自更强的共轭体系的延伸。 Ag纳米颗粒和gC ₃ N ₄之间的化学连接。此外，研究结果表明，RACN对芳香族硝基化合物的还原表现出优异的广谱催化性能，经过处理后，RACN的催化效率提高了数十倍。此外，RACN的光催化活性也大大提高。这一发现为通过化学蚀刻增强半导体和金属纳米粒子复合材料的催化活性提供了一种有效且简便的方法。