Abstract Pyramidal porous silicon (pPSi) synthesized through wet-chemical etching of doped silicon wafer with a large surface area and a wide absorption spectrum are used as a photocatalyst for the photodegradation of methylene blue (MB). The photocatalytic activity of pPSi has been enhanced using single-walled carbon nanotubes (SWCNTs). The role of the SWCNTs on the observed photocatalytic activity enhancement was investigated by analyzing the effect of carbon nanotubes density. SWCNTs loaded in pyramidal porous silicon exhibits a much important photocatalytic activity (52.21% MB degradation in 90 min) in comparison to bare pPSi (11.51% MB degradation in 90 min) under UV light irradiation. This novel nanocomposite can be used as effective photocatalyst for photocatalytic degradation of organic dyes and toxic pollutants and thus is of significant interest for water treatment.

中文翻译：

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单壁碳纳米管功能化对锥形多孔硅光催化性能的影响：实验证据

摘要 通过湿化学蚀刻法合成的具有大表面积和宽吸收光谱的掺杂硅片的金字塔形多孔硅（pPSi）被用作光催化降解亚甲基蓝（MB）。使用单壁碳纳米管 (SWCNT) 增强了 pPSi 的光催化活性。通过分析碳纳米管密度的影响，研究了单壁碳纳米管对观察到的光催化活性增强的作用。与紫外光照射下的裸 pPSi（90 分钟内降解 11.51% MB）相比，负载在锥形多孔硅中的 SWCNT 表现出非常重要的光催化活性（90 分钟内降解 52.21% MB）。