Abstract: Compared with the normal white TiO2 nanomaterials, the black TiO2 nanomaterials possess a unique crystalline core-amorphous shell structure and can boost its visible and infrared light absorption by band structure engineering. Improving the optical absorption of black TiO2 nanomaterials have attracted tremendous interest due to their applications in energy field and environmental pollution removal. The current review focuses on the various fabrication methods for black TiO2 nanomaterials, their morphological variations, structure along with their various chemical/physical properties, photocatalytic reaction mechanism and applications to environmental and technological fields such as photodegradation of organic pollutants, photocatalytic water splitting, dye sensitized solar cells, batteries, super capacitors and photothermal therapy.
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