Synthesis of oxygen-deficient blue titanium oxide by discharge plasma generated in aqueous ammonia solution

Mizukoshi, Yoshiteru; Ohwada, Megumi; Seino, Satoshi; Horibe, Hiroshi; Nishimura, Yoshimi; Terashima, Chiaki

doi:10.1016/j.apsusc.2019.05.353

Cited by 6 publications

(4 citation statements)

References 35 publications

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“…The crystal phase transformation and lattice rearrangement enhanced the yield of CO 2 from 50.9% to 96.6% in photocatalytic acetaldehyde degradation under ultraviolet light. Mizukoshi et al prepared blue Ovs-TiO 2 by ammonia solution plasma [79]. Under visible light, the •OH yield of SP-treated anatase-TiO 2 and P25-TiO 2 was higher than that of original TiO 2 .…”

Section: Physical and Chemical Properties Of Spmentioning

confidence: 99%

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Solution Plasma for Surface Design of Advanced Photocatalysts

Wang,

Xing

et al. 2023

Catalysts

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Rational design of the surface of photocatalysts can conveniently modulate the photo-stimulated charge separation, influence the surface reaction kinetics, and other pivotal factors in the photocatalytic processes for efficient photocatalysis. Solution plasma, holding promise for mild modification of the surface structure of materials, has recently been recognized as an emerging technology for surface engineering of high-performance photocatalysts. In this review, we will briefly introduce the fundamentals of solution plasma and its applications in materials preparation and summarize the recent research progress in the surface design of advanced photocatalysts by solution plasma. Lastly, we will indicate some possible new directions. This review is expected to provide an instructive guideline for the surface design of heterogeneous photocatalysts by solution plasma.

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Section: Physical and Chemical Properties Of Spmentioning

confidence: 99%

“…Saito et al reported that plasma discharging with Zn electrodes prepared flower-like ZnO nanoparticles in a high-temperature and unstirred K 2 CO 3 solution [85]. Table 2 summarizes various oxides prepared by SP in brief [78][79][80][81][82][83][84][85][86][87][88][89].…”

Section: Sp Formentioning

confidence: 99%

Solution Plasma for Surface Design of Advanced Photocatalysts

Wang,

Xing

et al. 2023

Catalysts

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“…For instance, An et al [107] prepared gray hydrogenated TiO 2 spheres using a plasma-modified sol-gel system. Mizukoshi et al [108] obtained a blue TiO 2 containing oxygen defects by generating discharge plasma in an aqueous ammonia solution containing TiO 2 powder. TiO 2 was reduced by a reducing species, such as hydrogen radicals generated during the plasma discharge process in aqueous ammonia.…”

Section: Plasma-assisted Depositionmentioning

confidence: 99%

A Review on Oxygen-deficient Titanium Oxide for Photocatalytic Hydrogen Production

Chen¹,

Fu²,

Peng³

2023

Preprint

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Photocatalytic technology based on specific band structure of semiconductors offers a promising way to solve the urgent energy and environmental issues in modern society. In particular, hydrogen production from water splitting over semiconductor photocatalysts attracts great attention owing to the clean source and application of energy, which highly depends on the performance of photocatalysts. Among the various photocatalysts, TiO2 has been intensively investigated and used extensively due to its outstanding photocatalytic activity, high chemical stability, non-toxicity and low cost. However, pure TiO2 has a wide band gap of approximately 3.2 eV, which limits its photocatalytic activity for water splitting to generate hydrogen only under ultraviolet light, excluding most of the inexhaustible sunlight for human beings. Fortunately, the band gap of semiconductors can be manipulated, in which introducing oxygen defects is one of the most effective measures to narrow the band gap of titanium oxides. This review starts out by the fundamentals of photocatalytic water splitting for hydrogen production over TiO2, discusses the latest progress in this field, and summarizes the various methods and strategies to induce oxygen defects in TiO2 crystals. Then, the next section outlines the modification approaches of oxygen-deficient titanium oxide (TiO2-δ) to further improve its photocatalytic performance. Finally, a brief summary and outlook of the researches on TiO2-δ photocatalysts for water splitting to produce hydrogen were presented.

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“…Therefore, after the synthesis a few more steps are needed to purify the nanomaterials. In recent times, the transformation of nanomaterials' shape and composition using different methods has been extensively studied to increase the catalytic efficiency of nanomaterials [7][8][9]. The electrical and optical properties of the nanomaterials strongly depend on their morphology.…”

Section: Introductionmentioning

confidence: 99%

Novel single-step synthesis and shape transformation of Au/CuO micro/nanocomposites using plasma-liquid interaction

2021

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We report a novel single-step synthesis method of metal/metal oxide composites and transformation of the shape of the oxide material by Plasma-Liquid Interaction. Considering the potential applications of noble metal nanoparticle decorated copper oxide composites, we synthesize Au/CuO micro/nanocomposites by generating plasma between two copper electrodes inside a gold precursor (HAuCl4) solution. Simultaneous synthesis of CuO and Au nanoparticles from the electrode material and from the precursor solution respectively is possible due to the interaction of energetic electrons and other active species formed in the plasma zone. Moreover, the process does not require any external stabilizing and reducing chemical agents. The method provides a remarkable tunability of the materials’ physical and chemical properties by only controlling the precursor solution concentration. By controlling process parameters, the shape of CuO particles can be transformed from spindles to sheet-like and the size of Au nanoparticles can also be varied. It influences the particles’ specific surface area and total pore volume. Plasmonic property of Au nanoparticles is also observed i.e. optical tunability can be achieved. The process is found to be effective for synthesis of desired nanomaterials having various energy storage and solar light-driven photocatalytic applications.

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Synthesis of oxygen-deficient blue titanium oxide by discharge plasma generated in aqueous ammonia solution

Cited by 6 publications

References 35 publications

Solution Plasma for Surface Design of Advanced Photocatalysts

Solution Plasma for Surface Design of Advanced Photocatalysts

A Review on Oxygen-deficient Titanium Oxide for Photocatalytic Hydrogen Production

Novel single-step synthesis and shape transformation of Au/CuO micro/nanocomposites using plasma-liquid interaction

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