A novel bifunctional Ni-doped TiO2 inverse opal with enhanced SERS performance and excellent photocatalytic activity

In this manuscript, a novel bitifunctional nickel doped titanium dioxide IOPM (Ni-TiO2 IOPM) was successfully prepared by using PS spheres array as the template. The Ni-TiO2 IOPM exhibited highly sensitive detection for 4-mercaptobenzoic acid (4-MBA) at a concentration as low as 1 × 10−11 M. And under the simulated sunlight, about 95% of the methylene blue (MB) is degraded within 90 min. So the prepared Ni-TiO2 IOPM may be a promising bitifunctional SERS substrate candidate for organic sewage detection or environment clean, the fabrication strategy also can be extended to prepare other nanomaterials with orderly and porous structure.