Enhanced photocurrent generation from indium–tin-oxide/Fe2TiO5 hybrid nanocone arrays

Chen, Kai; Dao, Thang Duy; Ngo, Thien Duc; Ngo, Hai Dang; Tamanai, Akemi; Ishii, Satoshi; Li, Xiangping; Misawa, Hiroaki; Nagao, Tadaaki

doi:10.1016/j.nanoen.2020.104965

Cited by 10 publications

(11 citation statements)

References 49 publications

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“…For the subsequent study, the low absorption can be enhanced by fabricating nanostructures which can exhibit light-trapping effects and enlarged surface area for better charge separation. Most recently, Chen et al demonstrated indium-tin-oxide/Fe 2 TiO 5 hybrid nanocone arrays which significantly improved photocurrent generation up to 31 times as compared to films deposited on planar substrates . The ITO nanocone platform enhanced the overall solar light absorption and the surface area leading to improved performance.…”

Section: Resultsmentioning

confidence: 99%

“…Most recently, Chen et al demonstrated indiumtin-oxide/Fe 2 TiO 5 hybrid nanocone arrays which significantly improved photocurrent generation up to 31 times as compared to films deposited on planar substrates. 55 The ITO nanocone platform enhanced the overall solar light absorption and the surface area leading to improved performance. Improvement in base Fe 2 TiO 5 photoanodes can yield even higher performance after further optimization.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Pulsed Laser Deposited Fe₂TiO₅ Photoanodes for Photoelectrochemical Water Oxidation

Bassi

Kölbach

et al. 2020

J. Phys. Chem. C

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Pulsed laser deposition (PLD) is an appealing technique to fabricate thin films with specific film orientation, stoichiometry, and morphology through tuning of experimental parameters. Here, we present Fe2TiO5, one of the promising photoanode materials, grown on fluorine-doped tin oxide (FTO) substrates through PLD. The structural and morphological properties of Fe 2 TiO 5 films, grown at room temperature and under varying oxygen pressure were studied. After deposition, all films were annealed in air at 650°C for 2 hours to complete phase crystallization. Films grown under vacuum (1.1 x 10 -6 mbar) were compact, dense, and had the anticipated stoichiometry, but lacked the long-range order expected for a crystalline phase in Xray diffraction. In contrast, using an oxygen pressure (p O 2 ) of around 9.7 x 10 -2 mbar during growth resulted in nanoporous, crystalline, and near-stoichiometric films of the orthorhombic Fe 2 TiO 5 pseudobrookite phase. These films demonstrated a photocurrent density of around 0.16 mA/cm 2 at 1.23 V vs RHE and a negative shift in onset potential by 150 mV under backside illumination as compared to the films grown under vacuum. Notably, these films exhibited a preferred (101) orientation of the pseudobrookite grains.This study proposes a viable strategy to fabricate pure phase and anisotropic Fe 2 TiO 5 photoanodes on FTO through PLD. This will pave a way to synthesis of other complex metal oxide photoelectrodes with precise control over critical properties like crystallinity, stoichiometry, and porosity that is imperative for their application in solar energy conversion.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Pulsed Laser Deposited Fe₂TiO₅ Photoanodes for Photoelectrochemical Water Oxidation

Bassi

Kölbach

et al. 2020

J. Phys. Chem. C

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“…The Fe 2p spectrum contains Fe 2p 3/2 at 710.8 eV and Fe 2p 1/2 at 724.0 eV with two additional satellite peaks located at 718.3 eV and 733.2 eV, which belong to the Fe 3+ oxidation state [39] . The Ti 2p spectrum contains Ti 2p 3/2 at 458.4 eV and Ti 2p 1/2 at 464.0 eV indexed to the Ti 4+ oxidation state [40] . The O 1s spectrum is deconvoluted into three peaks at 529.6 eV, 531.9 eV and 533.0 eV, which are attributed to the lattice oxygen, oxygen vacancy and adsorbed oxygen (Figure 2f).…”

Section: Resultsmentioning

confidence: 99%

“…[39] The Ti 2p spectrum contains Ti 2p 3/2 at 458.4 eV and Ti 2p 1/2 at 464.0 eV indexed to the Ti 4 + oxidation state. [40] The O 1s spectrum is deconvoluted into three peaks at 529.6 eV, 531.9 eV and 533.0 eV, which are attributed to the lattice oxygen, oxygen vacancy and adsorbed oxygen (Fig- ure 2f). [41] XPS spectra of FTO-H show almost identical results (Figure S7b-d).…”

Section: Resultsmentioning

confidence: 99%

Durable Electrocatalytic Reduction of Nitrate to Ammonia over Defective Pseudobrookite Fe₂TiO₅Nanofibers with Abundant Oxygen Vacancies

Guo

Wang

et al. 2022

Angewandte Chemie

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We propose the pseudobrookite Fe2TiO5 nanofiber with abundant oxygen vacancies as a new electrocatalyst to ambiently reduce nitrate to ammonia. Such catalyst achieves a large NH3 yield of 0.73 mmol h−1 mg−1cat. and a high Faradaic Efficiency (FE) of 87.6 % in phosphate buffer saline solution with 0.1 M NaNO3, which is lifted to 1.36 mmol h−1 mg−1cat. and 96.06 % at −0.9 V vs. RHE for nitrite conversion to ammonia in 0.1 M NaNO2. It also shows excellent electrochemical durability and structural stability. Theoretical calculation reveals the enhanced conductivity of this catalyst and an extremely low free energy of −0.28 eV for nitrate adsorption at the presence of vacant oxygen.

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“…Synthesized nanocomposites consisted of a visible light active component Fe 2 TiO 5 , Fe 3 O 4 , and α-Fe 2 O 3 in TFTO-800, TF-450, and TF-800, respectively. The theoretical band gap of spinel cubic Fe 3 O 4 is 0.14 eV, that of Fe 2 TiO 5 is around 2.25 eV, and that of α-Fe 2 O 3 is 2.1 eV, respectively. − Those visible-light active materials can promote the initial excitation of electrons from the CB to the VB. The band alignment of the individual component in the nanocomposite is very important for the photocatalytic activity.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of TiO₂ Spheres and a Visible Light Active α-Fe₂O₃/TiO₂-Rutile/TiO₂-Anatase Heterogeneous Photocatalyst from Natural Ilmenite

et al. 2022

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High-purity (98.8%, TiO 2 ) rutile nanoparticles were successfully synthesized using ilmenite sand as the initial titanium source. This novel synthesis method was cost-effective and straightforward due to the absence of the traditional gravity, magnetic, electrostatic separation, ball milling, and smelting processes. Synthesized TiO 2 nanoparticles were 99% pure. Also, highly corrosive environmentally hazardous acid leachate generated during the leaching process of ilmenite sand was effectively converted into a highly efficient visible light active photocatalyst. The prepared photocatalyst system consists of anatase-TiO 2 /rutile-TiO 2 /Fe 2 O 3 (TF-800), rutile-TiO 2 /Fe 2 TiO 5 (TFTO-800), and anatase-TiO 2 /Fe 3 O 4 (TF-450) nanocomposites, respectively. The pseudo-second-order adsorption rate of the TF-800 ternary nanocomposite was 0.126 g mg –1 min –1 in dark conditions, and a 0.044 min –1 visible light initial photodegradation rate was exhibited. The TFTO-800 binary nanocomposite adsorbed methylene blue (MB) following pseudo-second-order adsorption (0.224 g mg –1 min –1 ) in the dark, and the rate constant for photodegradation of MB in visible light was 0.006 min –1 . The prepared TF-450 nanocomposite did not display excellent adsorptive and photocatalytic performances throughout the experiment period. The synthesized TF-800 and TFTO-800 were able to degrade 93.1 and 49.8% of a 100 mL, 10 ppm MB dye solution within 180 min, respectively.

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Enhanced photocurrent generation from indium–tin-oxide/Fe2TiO5 hybrid nanocone arrays

Cited by 10 publications

References 49 publications

Pulsed Laser Deposited Fe₂TiO₅ Photoanodes for Photoelectrochemical Water Oxidation

Pulsed Laser Deposited Fe₂TiO₅ Photoanodes for Photoelectrochemical Water Oxidation

Durable Electrocatalytic Reduction of Nitrate to Ammonia over Defective Pseudobrookite Fe₂TiO₅Nanofibers with Abundant Oxygen Vacancies

Fabrication of TiO₂ Spheres and a Visible Light Active α-Fe₂O₃/TiO₂-Rutile/TiO₂-Anatase Heterogeneous Photocatalyst from Natural Ilmenite

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Enhanced photocurrent generation from indium–tin-oxide/Fe2TiO5 hybrid nanocone arrays

Cited by 10 publications

References 49 publications

Pulsed Laser Deposited Fe2TiO5 Photoanodes for Photoelectrochemical Water Oxidation

Pulsed Laser Deposited Fe2TiO5 Photoanodes for Photoelectrochemical Water Oxidation

Durable Electrocatalytic Reduction of Nitrate to Ammonia over Defective Pseudobrookite Fe2TiO5Nanofibers with Abundant Oxygen Vacancies

Fabrication of TiO2 Spheres and a Visible Light Active α-Fe2O3/TiO2-Rutile/TiO2-Anatase Heterogeneous Photocatalyst from Natural Ilmenite

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Product

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About

Pulsed Laser Deposited Fe₂TiO₅ Photoanodes for Photoelectrochemical Water Oxidation

Pulsed Laser Deposited Fe₂TiO₅ Photoanodes for Photoelectrochemical Water Oxidation

Durable Electrocatalytic Reduction of Nitrate to Ammonia over Defective Pseudobrookite Fe₂TiO₅Nanofibers with Abundant Oxygen Vacancies

Fabrication of TiO₂ Spheres and a Visible Light Active α-Fe₂O₃/TiO₂-Rutile/TiO₂-Anatase Heterogeneous Photocatalyst from Natural Ilmenite