Well-ordered TiO₂ nanosheets arrays (TiO₂ NSAs) are fabricated on the surface of carbon paper (CP) by a hydrothermal method, and Ag nanoparticles (Ag NPs) are in situ deposited at the surface of TiO₂ NSAs with an optimized deposition time. The prepared Ag NPs/TiO₂ NSAs/CP hybrid are proved to be photocatalysis induced self-cleaning SERS substrates with excellent Raman enhancement activity, uniformity, reusability and renewability. The analytical enhancement factor is 2.52 × 10⁸ for 4-mercaptobenzoic acid. Meanwhile, the substrate has excellent spot-to-spot uniformity and long-term stability. In addition, the Ag NPs/TiO₂ NSAs/CP hybrid can renew and be reused for several times due to the photocatalysis induced self-cleaning feature. It can be used in analysis of chlorpyrifos with a low limit of detection. This reusable SERS substrate has great promising in applications of detecting toxic chemicals, environmental pollutants, food additives and so on.

通过水热法在碳纸（CP）的表面上制备出有序的TiO ₂纳米片阵列（TiO ₂ NSAs），并通过优化沉积将Ag纳米颗粒（Ag NPs）原位沉积在TiO ₂ NSA表面时间。制备的Ag NPs / TiO ₂ NSAs / CP杂化物被证明是光催化诱导的自清洁SERS基质，具有出色的拉曼增强活性，均匀性，可重复使用性和可更新性。4-巯基苯甲酸的分析增强因子为2.52×10 ⁸。同时，基板具有出色的点对点均匀性和长期稳定性。另外，Ag NPs / TiO ₂由于光催化诱导的自清洁功能，NSA / CP杂化物可以更新并重复使用多次。可用于检测毒死rif的分析，检出限低。这种可重复使用的SERS基质在检测有毒化学物质，环境污染物，食品添加剂等方面的应用具有巨大的前景。