Hydrogen incorporation by plasma treatment gives mesoporous black TiO2 thin films with visible photoelectrochemical water oxidation activity

Islam, Syed Z.; Reed, Allen; Nagpure, Suraj; Wanninayake, Namal; Browning, James F.; Strzalka, Joseph; Kim, Doo Young; Rankin, Stephen E.

doi:10.1016/j.micromeso.2017.10.036

Cited by 32 publications

(21 citation statements)

References 52 publications

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“…Over the centuries, due to the unreasonable use of the planet's resources and the reduction of water resources, the increased need for renewable energy sources and food production are currently considered as urgent problems to be solved, facts that have motivated countless studies focused on the films were prepared by a surfactant templated sol-gel method and, subsequently, treated with 400 W microwave-assisted CVD hydrogen plasma for 30 min [26]. They performed photoelectrochemical water oxidation measurements that evidenced an increase in the photocurrent of ca.…”

Section: Introductionmentioning

confidence: 99%

Black TiO2 Thin Films Production Using Hollow Cathode Hydrogen Plasma Treatment: Synthesis, Material Characteristics and Photocatalytic Activity

et al. 2020

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Black TiO2 materials have been quite widely explored due to their large solar absorption and superior photocatalytic activity. In this paper, the blackening process of titanium dioxide (TiO2) thin film using the hollow cathode hydrogen plasma (HCHP) technique is reported. First, pristine anatase TiO2 films were grown by magnetron sputtering onto silicon and cover glass substrates and then annealed at 450 °C for 2 h. Then, the as-grown TiO2 films were treated with HCHP for 15 min. The physical, chemical and morphological properties of the films were analyzed by profilometry, X-ray diffraction (XRD), UV-Vis spectrophotometry, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) techniques. Electrical and photocatalytic measurements were performed by four-point probe and methylene blue UV degradation assays, respectively. The results showed that the black TiO2 film is highly absorbent in the UV-visible region, has low electrical resistance and greater surface area compared to the non-treated TiO2 film. These properties of black TiO2 film, as well as its performance as a photocatalytic agent, were investigated, indicating the superior quality of this material in thin film form and the promising potential of the HCHP treatment to produce hydrogenated TiO2 in short process time.

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Section: Introductionmentioning

confidence: 99%

Black TiO2 Thin Films Production Using Hollow Cathode Hydrogen Plasma Treatment: Synthesis, Material Characteristics and Photocatalytic Activity

et al. 2020

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“…However, the wide bandgap of pristine TiO2 (typically 3.0-3.2 eV) is still a great challenge in the solar energy harvesting 3 . An enormous amount of approaches has been proposed to narrow the bandgap of TiO2 and limit the recombination rate of the photo-generated electrons and holes to improve the activity of TiO2 as the anode in PEC water splitting [4][5][6] . One of the approaches has been doping with metallic and non-metallic atoms.…”

Section: Introductionmentioning

confidence: 99%

A two-anode reduction technique to monitor the defect and dope the surface of TiO2 nanotube array as photo-anode for water splitting

Hou

Jiang

2019

Applied Catalysis B: Environmental

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A two-anode reduction (TAR) technique is adopted to prepare, in one step without the existence of gaseous hydrogen, black TiO2 nanotubes co-doped with carbon and nitrogen. A sample prepared with the TAR technique for 2 min achieved the highest photocurrent response as 2.05 mA/cm 2 , which is 3 times as high as that of the pristine TiO2 nanotubes. A synergistic effect between black hydrogenation and C, N co-doping is observed. The light absorption in the whole ultraviolet-visible (UV-Vis) range is also greatly enhanced.

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“…Vast efforts have been made in the synthesis of mesoporous and thin‐film black TiO 2 −x . For example, Huang et al used supramolecular self‐assembly to prepare ordered mesoporous titania‐based materials with a Magneli phase .…”

Section: Introductionmentioning

confidence: 99%

Black Titania with Nanoscale Helicity

Nguyen

Lizundia

et al. 2019

Adv Funct Materials

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The fabrication of mesoporous black titanium dioxide (TiO 2−x ) with a chiral nematic organization of core-shell nanorods is reported. Chiral templating of TiO 2 nanoparticles onto gelatin-functionalized cellulose nanocrystals (CNCs) followed by calcination yields carbonized TiO 2 /CNC helical materials that recover white TiO 2 replicas after carbon removal. The hydrothermal surface reduction of the traditional white TiO 2 by ascorbic acid affords freestanding chiral nematic black TiO 2−x . The black TiO 2−x is a visible light active semiconducting mesoporous structure constructed by chiral nematic crystalline-amorphous TiO 2 core-shell nanorods. The chiral black TiO 2−x nanoparticles supported on mesoporous nanocarbon networks are evaluated as lithium-ion battery anode electrodes. Beyond the current efforts, these black TiO 2−x materials and their composites may be useful in the fields of energy storage and catalysis.

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Hydrogen incorporation by plasma treatment gives mesoporous black TiO2 thin films with visible photoelectrochemical water oxidation activity

Cited by 32 publications

References 52 publications

Black TiO2 Thin Films Production Using Hollow Cathode Hydrogen Plasma Treatment: Synthesis, Material Characteristics and Photocatalytic Activity

Black TiO2 Thin Films Production Using Hollow Cathode Hydrogen Plasma Treatment: Synthesis, Material Characteristics and Photocatalytic Activity

A two-anode reduction technique to monitor the defect and dope the surface of TiO2 nanotube array as photo-anode for water splitting

Black Titania with Nanoscale Helicity

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