Supersonic aerosol-deposited TiO<sub>2</sub> photoelectrodes for photoelectrochemical solar water splitting

Park, Jung Jae; Kim, Do Yeon; Lee, Jong Gun; You, Hong; Swihart, Mark T.; Yoon, Sam S.

doi:10.1039/c3ra47998f

Cited by 23 publications

(14 citation statements)

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“…It is clear that the photocurrent density increases with film mass. As discussed previously, the thicker films not only absorb more light, but more importantly have more micro‐cracks and pores, and therefore have greater accessible surface area for catalysis . However, using the pure TiO 2 , there was a maximum film thickness to which the kinetic spraying was limited.…”

Section: Resultsmentioning

confidence: 92%

Graphene–Titania Hybrid Photoanodes by Supersonic Kinetic Spraying for Solar Water Splitting

et al. 2014

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We report the synthesis of graphene–TiO2 (G–TiO2) composite films that exhibit significantly enhanced photoelectrochemical water‐splitting performance relative to pure TiO2. Supersonic kinetic spraying was used to produce strongly adhered, electrically and mechanically robust G–TiO2 composite films containing 0.1, 0.5, 1.0, and 5.0 wt.% graphene. Films with an intermediate graphene content of 1.0 wt.% demonstrated the best water‐splitting performance. G–TiO2 composite films with 1.0 wt.% graphene exhibited photocurrent density ten times that of pure TiO2 films. The electron transfer between TiO2 and graphene suppresses the recombination of photoinduced charge carriers and prolongs the electron excited‐state lifetime, which contributes to the enhanced photoelectrochemical water‐splitting performance.

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Section: Resultsmentioning

confidence: 92%

Graphene–Titania Hybrid Photoanodes by Supersonic Kinetic Spraying for Solar Water Splitting

et al. 2014

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“…Earlier work not based on the cold spraying method revealed that the photoresponse of TiO 2 films fabricated by aerosol deposition depended upon film thickness. The highest photocurrent of 93 µA cm ‐2 was obtained for a film thickness of 4 µm . However, for TiO 2 films irradiated with an electron beam, the PCD increased even more up to 0.205 mA cm ‐2 .…”

Section: Applications Of Supersonic Cold Spraying For Energy and Environmental Technologiesmentioning

confidence: 94%

“…The highest photocurrent of 93 A/cm 2 was obtained for a film thickness of 4 m. [177] However, for TiO 2 films irradiated with an electron beam, the PCD increased even more up to 0.205 mA/cm 2 . [178] Furthermore, to enhance the photocurrent, solution-based aerosol deposition was reported, whereby graphene was added to TiO 2 to reduce the electron-hole recombination and enable faster charge transfer.…”

Section: Photoelectrodes For Photoelectrochemical Water Splittingmentioning

confidence: 99%

Supersonic Cold Spraying for Energy and Environmental Applications: One‐Step Scalable Coating Technology for Advanced Micro‐ and Nanotextured Materials

Joshi

Yarin

et al. 2019

Advanced Materials

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Supersonic cold spraying is an emerging technique for rapid deposition of films of materials including micron-size and submicron metal particles, nanoscale ceramic particles, clays, polymers, hybrid materials comprised of polymers and particulates, reduced graphene oxide (rGO), and metal-organic frameworks. In this method, particles are accelerated to a high velocity and then impact a substrate at near ambient temperature, where dissipation of their kinetic energy produces strong adhesion. This manuscript reviews the recent progress in fundamentals and applications of cold spraying. High velocity impact with the substrate results in significant deformation, which not only produces adhesion, but can change the particles' internal structure. Cold-sprayed coatings can also exhibit micro-and nanotextured morphologies not achievable by other means. Suspending micro-or nanoparticles in a liquid and cold-spraying the suspension produces fine atomization and even deposition of materials that could not otherwise be processed. The scalability and low-cost of this method and its This article is protected by copyright. All rights reserved. 3 compatibility with roll-to-roll processing make it promising for many applications, including ultra-thin flexible materials, solar cells, touch-screen panels, nanotextured surfaces for enhanced heat transfer, thermal and electrical insulation films, transparent conductive films, materials for energy storage (e.g. Li-ion battery electrodes), heaters, sensors, photoelectrodes for water splitting, water purification membranes, and self-cleaning films.

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“…The accelerated particles are pulverized upon impact with the substrate, forming a thin film. A complete description of the experimental setup is available elsewhere [15][16][17][18][19].…”

Section: Materials Propertiesmentioning

confidence: 99%

Thin-film metallization of CuInGaSe2 nanoparticles by supersonic kinetic spraying

Park

Lee

James

et al. 2015

Computational Materials Science

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Supersonic aerosol-deposited TiO₂ photoelectrodes for photoelectrochemical solar water splitting

Abstract: The supersonically expanded gas flow accelerating titania particles for the fabrication of a titania thin film as a photoelectrochemical anode.

Cited by 23 publications

References 57 publications

Graphene–Titania Hybrid Photoanodes by Supersonic Kinetic Spraying for Solar Water Splitting

Graphene–Titania Hybrid Photoanodes by Supersonic Kinetic Spraying for Solar Water Splitting

Supersonic Cold Spraying for Energy and Environmental Applications: One‐Step Scalable Coating Technology for Advanced Micro‐ and Nanotextured Materials

Thin-film metallization of CuInGaSe2 nanoparticles by supersonic kinetic spraying

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Supersonic aerosol-deposited TiO2 photoelectrodes for photoelectrochemical solar water splitting

Abstract: The supersonically expanded gas flow accelerating titania particles for the fabrication of a titania thin film as a photoelectrochemical anode.

Cited by 23 publications

References 57 publications

Graphene–Titania Hybrid Photoanodes by Supersonic Kinetic Spraying for Solar Water Splitting

Graphene–Titania Hybrid Photoanodes by Supersonic Kinetic Spraying for Solar Water Splitting

Supersonic Cold Spraying for Energy and Environmental Applications: One‐Step Scalable Coating Technology for Advanced Micro‐ and Nanotextured Materials

Thin-film metallization of CuInGaSe2 nanoparticles by supersonic kinetic spraying

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Supersonic aerosol-deposited TiO₂ photoelectrodes for photoelectrochemical solar water splitting