**4. Conclusion**

In brief, plasmonic nanohybrids have the tremendous ability to show remarkable performance for environmental sensing and energy harvesting applications. Noble metal nanoparticles functionalized TiO2 nanostructures-based studies provided significant evidence for their capability to address the environmental detoxification and energy crises problems. This chapter provides the recent trends, development, and applicability of plasmonic-TiO2 nanohybrids for energy and environmental applications. This chapter includes fundamental aspects of the plasmonic-TiO2 nanohybrid designing and brief details for the mechanism for SERS-based detection, environmental remediation, and solar cell applications. The fascinating properties of plasmonic nanohybrids include tunable enhanced optical absorption and efficient charge separation properties which open up several new opportunities for the researcher to engineer them for targeted new applications. In this chapter, we have presented the roadmap of each application by using the plasmonic-TiO2 nanohybrids which can provide a better understanding for the readers to develop the plasmonic nanohybrids for particular applications. Certainly, the research field dealing with plasmonic nanohybrids is growing rapidly and in the future, properties, and applications will be explored for the plasmonic-TiO2 nanohybrids.

*Plasmonic-TiO2 Nanohybrid for Environmental and Energy Applications DOI: http://dx.doi.org/10.5772/intechopen.111524*
