Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 1, Pages 122-127Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b07685
Keywords
Ta2O5; nanowire; aluminum reduction; photocatalysis; PEC
Funding
- National Natural Science Foundation of China
- Science and Technology Commission of Shanghai
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Black TiO2, with enhanced solar absorption and photocatalytic activity, has gained extensive attention, inspiring us to investigate the reduction of other wide-bandgap semiconductors for improved performance. Herein, we report the preparation of gray Ta2O5 nanowires with disordered shells and abundant defects via aluminum reduction. Its water decontamination is 2.5 times faster and hydrogen production is 2.3-fold higher over pristine Ta2O5. The reduced Ta2O5 also delivers significantly enhanced photoelectrochemical performance compared with the pristine Ta2O5 nanowires, including much higher carrier concentration, easier electron-hole separation and 11 times larger photocurrent. Our results demonstrate that Ta2O5 will have great potentials in photocatalysis and solar energy utilization after proper modification.
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