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Synthesis of visible and near infrared light sensitive amorphous titania for photocatalytic hydrogen evolution
- Jiang, Jinghui, Tang, Xingwei, Zhou, Shujun, Ding, Jian, Zhou, Han, Zhang, Fan, Zhang, Di, Fan, Tongxiang
- Green chemistry 2016 v.18 no.7 pp. 2056-2062
- clean energy, green chemistry, hydrogen production, hydrolysis, near infrared radiation, photocatalysis, titanium, titanium dioxide, wavelengths
- A simple and environmentally safe method of anaerobic hydrolysis was designed to synthesize amorphous TiO₂₋ₓ containing Ti³⁺ from the dissolution of Ti⁰ by water in an anaerobic environment. The disordered arrangement of atoms in amorphous TiO₂₋ₓ enables it to expand its light absorbing boundary from the ultraviolet to near infrared light region by narrowing its mobility gap to 1.5 eV. As a result, an effective visible and near infrared light photocatalytic hydrogen evolution from water splitting can be achieved by the as-synthesized amorphous TiO₂₋ₓ with the aid of Ti³⁺ to inhibit charge recombination. An ideal quantum yield of approximately 4.57% was achieved at a wavelength of 488 nm. This strategy represents a new approach to alter the activity of TiO₂, and it is meaningful for achieving green production of artificial clean energy.