The present paper focused on the preparation of hydrogen titanate nanotubes and nanowires and their conversion into titania by heat treatments.The structural,morphology and optical properties of as-prepared nanostructured titanate and titania were investigated by transmission electron microscopy (TEM),X-ray diffraction (XRD) and diffusive reflectance spectra.The slim diameter of these nanostructured titanate and titania,the versatile crystal structure and special optical and electronic properties may make them find versatile applications in chemical sensors for multiple purposes. The present paper focused on the preparation of hydrogen titanate nanotubes and nanowires and their conversion into titania by heat treatments. The structural, morphology and optical properties of as-prepared nanostructured titanate and titania were investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD) and diffusive reflectance spectra.The slim diameter of these nanostructured titanate and titania, the versatile crystal structure and special optical and electronic properties may make them find versatile applications in chemical sensors for multiple purposes.