Effect of two-step annealing on photoelectrochemical properties of hydrothermally prepared Ti-doped Fe2O3 films

Advanced hematite nanomaterials for newly emerging applications

“…In this case, the crystallinity tuning was simultaneously achieved. 90 Furthermore, very recently, Balan demonstrated that through the ultrasonic exfoliation of bulk a-Fe 2 O 3 powder in N,N-dimethylformamide, hematene monolayers with a theoretical thickness of 3.98 Å were obtained, as displayed in Fig. 3t.…”

Porous Transport Photoelectrodes Fabricated on Felt Substrates and Applications to Polymer Electrolyte Photoelectrochemistry

“…[5,6] Several porous photoanodes (ntype TiO 2 , WO 3 , BiVO 4 , Fe 2 O 3 , and SrTiO 3 ) and photocathodes (ptype CuInS 2 and Cu 2 O) have been prepared on porous felt substrates composed of carbon and titanium microfibers. [4][5][6][7][8][9][10][11][12][13] Carbon microfibers could be oxidatively decomposed during thermal treatments and photoanodic reactions. In contrast, titanium microfibers have better tolerance under oxidative conditions compared with carbon microfibers.…”

“…Ti 4 + doping increased the donor density of the Fe 2 O 3 layer via the second annealing step in the absence of oxygen. [8] Ti-doped Fe 2 O 3 /Tifelt was further modified by an Al 2 O 3 passivation layer and a cobalt phosphate (CoPi) OER co-catalyst; porous Ti-doped Fe 2 O 3 -Al 2 O 3 -CoPi exhibited a J photo of 0.85 mA cm À 2 at 1.23 V vs. RHE in 1 M NaOH (pH 13.6) under 1-sun illumination (AM1.5G). [31] The relatively lower performance would be improved by adopting reported preparation methods for the highly efficient hematite photoanodes.…”

“…A 3D conductive substrate with a large surface area provides a large semiconductor surface, which is beneficial for enhancing photoabsorption while maintaining layer thickness [5,6] . Several porous photoanodes (n‐type TiO 2 , WO 3 , BiVO 4 , Fe 2 O 3 , and SrTiO 3 ) and photocathodes (p‐type CuInS 2 and Cu 2 O) have been prepared on porous felt substrates composed of carbon and titanium microfibers [4–13] . Carbon microfibers could be oxidatively decomposed during thermal treatments and photoanodic reactions.…”

“…Ti‐doped Fe 2 O 3 on porous Ti felt exhibited a higher J photo value than flat FTO glass or Ti sheets. Ti 4+ doping increased the donor density of the Fe 2 O 3 layer via the second annealing step in the absence of oxygen [8] . Ti‐doped Fe 2 O 3 /Ti‐felt was further modified by an Al 2 O 3 passivation layer and a cobalt phosphate (CoPi) OER co‐catalyst; porous Ti‐doped Fe 2 O 3 ‐Al 2 O 3 ‐CoPi exhibited a J photo of 0.85 mA cm −2 at 1.23 V vs. RHE in 1 M NaOH (pH 13.6) under 1‐sun illumination (AM1.5G) [31] .…”