Effect of TiO2 supporting layer on Fe2O3 photoanode for efficient water splitting

Efficient water oxidation using α-Fe2O3 thin films conformally coated on vertically aligned titania nanotube arrays by atomic layer deposition

“…This reasonably explains the observed high photocurrent and hole density. That TiO 2 as a support layer of hematite films can effectively collect carriers was also reported by other group very recently [26]. We expect that the PEC performance of the TNT@α-Fe 2 O 3 photoanodes can be further improved by optimizing the structural parameters (e.g., NT length, hematite layer thickness) and by incorporating oxygen evolution catalysts.…”

Modification of a thin layer of α-Fe2O3 onto a largely voided TiO2 nanorod array as a photoanode to significantly improve the photoelectrochemical performance toward water oxidation

“…Moreover, TiO2/Fe2O3 heterojunction can efficiently enhance the charge separation. [25][26][27] Although various approaches discussed above have been used to improve the photoelectrochemical catalytic activity of the TiO2 based-photoanodes but the conversion efficiency and the oxygen evolution current density are still relatively low. Mao et al synthesized α-Fe2O3 nanoparticles decorated densely arranged TiO2 nanotube array through a electrochemical deposition method, which improves photocurrent density (~0.55 mA/cm 2 at 1.23 V vs RHE) 21 but is still not as good as the reported TiO2-based photoanode possibly due to the densely packed tube array only allowing Fe2O3 deposition on the top surface to result in very limit effect.…”

Enhanced photocatalytic water splitting of a SILAR deposited α-Fe2O3 film on TiO2 nanoparticles

“…So when the amount of a-Fe 2 O 3 was increased from an optimal amount, because photoelectrons accumulated on a-Fe 2 O 3 , the recombination probability of the electron-holes increased. 48 So a-Fe 2 O 3 being as an electron-hole recombination center, and resulted a reduction in optical activity. 49 In order to investigate the charge transport properties of the bare TiO 2 and a-Fe 2 O 3 /TiO 2 samples, the electrical impedance spectroscopy measurements (EIS) were performed for various samples.…”