Abstract
To accomplish photocurrent enhancement on pristine TiO2 nanotubes (Ti4+, TNT), defect sites Ti3+ were introduced into pristine TNT by electrochemical reduction approach. The black Ti3+ doped TNT (T-TNT) exhibits excellent absorption (400 nm~850 nm) in visible region, where it shows remarkable electrical conductivity. Based on these two advantages, the photocurrent of Ti3+ doped TNT is enhanced by 3.6 times under visible light (~100 mW/cm2) compared with pristine TNT. After loaded with different size CdSe quantum dots (QDs), the maximum photocurrent of T-TNT/CdSe QDs nanocomposite electrode can reach up to 347.2 µA/cm2, which is 8.1 times larger than that of pristine TNT (42.9 µA/cm2). The results further proved that the narrower bandgap could attribute more photo-induced electron-hole pairs under visible illumination. This work may offer a simple approach to synthesize advanced nanocomposites in the field of photocatalysis or photovoltaic conversion.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
