Abstract
Hydrogen is considered to be a sustainable, clean form of energy and a fundamental pillar to combat global warming. Hence, it is necessary to develop an eco – friendly, efficient energy storage device for future generations. Herein, we have developed an effective, vacuum annealing synthetic protocol to prepare black TiO2 (BT), black-nitrogen doped TiO2 (BNT) and RGO composited black TiO2 (BTG) in the presence of ethanol for an efficient photocatalytic hydrogen generation. Change in the optical and electronic properties of black nanocomposites are examined by UV-vis and PL studies. Investigation of FTIR and XPS confirms the reduction of functional groups on the nanocomposites. Meanwhile, low photocatalytic efficiency and capacitance of BNT than expected has been associated with the formation of N-O moiety during the annealing process. Plausible mechanism has been proposed for the low efficiency of BNT to understand the electronic structures of black nanocomposite.
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