Plasma induced tungsten doping of TiO<sub>2</sub> particles for enhancement of photocatalysis under visible light

Ishida, Yohei; Motokane, Yasutomo; Tokunaga, Tomoharu; Yonezawa, Tetsu

doi:10.1039/c5cp03400k

Cited by 20 publications

(12 citation statements)

References 20 publications

(38 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Introducing reactive gas and sputter systems, which allow manipulation of energies and chemical state of the sputtered atoms/clusters, for doping multiple metal NPs and for synthesizing desired compounds and structures can be also considered for sputtering onto liquids towards advanced nanomaterials. Regarding production of metal, metal alloy and hybrid nanoparticles with wide variety of morphologies, higher ordered structure, doping and functionalization, we have demonstrated that our solution synthesis approaches based on chemical reduction, plasma in liquid process and stabilizing agents are very versatile [120][121][122][123][124][125][126] though in many cases toxic chemicals and by-products are present as they are also expected in other reports. Hence, we encourage and welcome other researchers join investigating this new vacuum sputtering onto liquid method, take all of its great advantages as the green technique for pure nanoparticles and unexpected structures, as well as devote new ideas for achieving more versatile control of the sputtered NPs.…”

Section: Summary and Prospectssupporting

confidence: 61%

Sputtering onto a liquid: interesting physical preparation method for multi-metallic nanoparticles

Nguyen

Yonezawa

2018

Science and Technology of Advanced Materials

Self Cite

View full text Add to dashboard Cite

The young history of sputtering onto a liquid features great achievements in the green production of various metal and metal oxide nanoparticles (NPs) and nanoclusters (NCs). Studies on how the sputtering parameters affect the properties of NPs and NCs have elucidated their formation mechanism and marked a crucial role of liquid matrix in the nucleation and growth of particles, controlling their various properties. Current research has been devoted to making alloy bi-and trimetallic NPs with a high level of control over the NP structure, composition, and size via well-designed target systems, sputtering steps, and liquid matrix materials. In this minireview, we discuss the recent advances in the use of various types of targets to prepare different bi-and trimetallic NPs. In single target sputtering, systems with alternative configurations of metals, alloy targets, monometallic targets in sequence, and a combination of sputtering and chemical reactions have been developed. On the other hand, a double head system was introduced to widen the range of controllable sputtering parameters yielding more versatility in particle composition and fine structure. The synergistic and tuneable properties exhibited by the multi-metallic components in small NPs and NCs for their use in catalysis and optical applications are discussed.

show abstract

Section: Summary and Prospectssupporting

confidence: 61%

Sputtering onto a liquid: interesting physical preparation method for multi-metallic nanoparticles

Nguyen

Yonezawa

2018

Science and Technology of Advanced Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…[9,[14][15][16] Although the recent advancements of using TiO 2 -NP provide the high-quality products in our daily life, the modification of TiO 2 -NP is critical to achieve the high efficiency in the utilization of the solar energy. [2] Due to the wide band gap energy (≈ 3.2 eV, corresponding to a wavelength of 380 nm to 390 nm), [2,4,5,7] the bare TiO 2 -NP (i.e., without modification) has been reported to be mainly active in the UV and the near-UV range of the electromagnetic spectrum. Besides, the high recombination rate of photogenerated hole-electron pairs of TiO 2 -NP was also reported to be a critical issue to the photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8] The advantages of TiO 2 -NP include low cost, high chemical and thermal stability, ready availability, ease of handling, and non-toxicity. [4,5,9,10] The functional response of TiO 2 -NP is fundamentally governed by the generation of charge carrier by photons.…”

Section: Introductionmentioning

confidence: 99%

“…[4,5,9,10] The functional response of TiO 2 -NP is fundamentally governed by the generation of charge carrier by photons. [4][5][6][7][8]11] In principle, the positive holes can be used to oxidize the organic compounds, where the negative electrons can be used to reduce the conversion of molecular oxygen to superoxide radical anions in the complete cycle of photo-catalysis. [12][13][14] Therefore, the applications of TiO 2 -NP have extended into a variety of areas of photocatalysis, for example, the photo-decomposition of the toxic components, which has shown to very useful for a variety of environmental applications including the purification of water and air in the environment.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Noble metal-titania hybrid nanoparticle clusters and the interaction to proteins for photo-catalysis in aqueous environments

Tsai

Wang

Chen

et al. 2017

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…Among the various H 2 O 2 detection techniques that have been developed, which include spectrometry, fluorescence, and chromatography, the electrochemical methods offer special combinational advantages like low detection limit, high plasmas have been used to grow polymer films on different substrates [28]. Tungsten-doped TiOx nanoparticles (NPs) were obtained through the modification of commercially available TiO 2 NPs using plasma processing [29]. Tungsten trioxide NPs were synthesized by microwave plasma treatment [30].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Metal Oxide Based Catalytic Electrodes by AC Plasma Deposition and Electrochemical Detection of Hydrogen Peroxide

Bui

Gopalan

et al. 2019

Catalysts

View full text Add to dashboard Cite

In this study, the fabrication of a metal oxide nanoparticles (NPs) dispersed catalytic electrode is described based on a new alternating current (AC) plasma deposition approach. The fabrication involves the treatment of AC plasma on a precursor solution comprised of metal salts such as CuCl 2 , FeCl 2 , and ZnCl 2 , and a monomer (acrylic acid) in the presence/absence of a cross-linker. Furthermore, the utility of such developed electrodes has been demonstrated for the electrochemical determination of hydrogen peroxide (H 2 O 2 ). The electrode materials obtained through plasma treatment was characterized by Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscope (SEM), contact angle measurements, energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry. Among the metal oxide modified electrodes prepared by the AC plasma deposition method, the copper oxide (CuO) NPs catalytic electrode exhibited significant oxidation and reduction peaks for H 2 O 2 in phosphate-buffered saline solution. The catalytic electrode with CuO NPs exhibited a combination of good H 2 O 2 sensing characteristics such as good sensitivity (63.52 mA M −1 cm −2 ), good selectivity, low detection limits (0.6 µM), fast sensing response (5 s), a wide linear range (0.5-8.5 mM), and good stability over 120 cycles. Based on our results, it is well demonstrated that plasma deposition could be effectively utilized for the fabrication of the catalytic electrode for detection of H 2 O 2 concentrations. Further, the strategy of using AC plasma for fabrication of metal oxide-based modified electrodes could also be extended for the fabrication of other kinds of nanomaterials-based sensors.Catalysts 2019, 9, 888 2 of 16 selectivity, and high sensitivity [5][6][7][8][9][10]. It must be noted that a variety of electrochemical H 2 O 2 sensors reported in literature are predominantly based on enzymes. Knowing the intrinsic disadvantages of enzyme-based electrochemical sensors, non-enzymatic H 2 O 2 sensors are receiving considerable interest in recent years due to their advantages such as low cost, high stability, prompt response, ultra-low detection limit, and excellent sensitivity. Non-enzymatic electrochemical H 2 O 2 sensors are designed based on H 2 O 2 electro-oxidation/electroreduction and thus require electrocatalytic materials. Therefore, development of new electrode materials with high catalytic activity and catalytic stability is continuously being given priority and utmost importance.Several metal oxide nanostructures [11][12][13][14][15][16][17] have been utilized to modify the surface of electrodes and were demonstrated to exhibit excellent redox capabilities towards detection of H 2 O 2 with high reaction activity, catalytic efficiency, strong absorption ability, and low cost [18,19]. Particularly, copper oxide (CuO) has been extensively used in non-enzymatic electrochemical sensors, due to its excellent electrochemical properties (proper redox potentials), catalytic propert...

show abstract

Plasma induced tungsten doping of TiO₂ particles for enhancement of photocatalysis under visible light

Cited by 20 publications

References 20 publications

Sputtering onto a liquid: interesting physical preparation method for multi-metallic nanoparticles

Sputtering onto a liquid: interesting physical preparation method for multi-metallic nanoparticles

Noble metal-titania hybrid nanoparticle clusters and the interaction to proteins for photo-catalysis in aqueous environments

Facile Fabrication of Metal Oxide Based Catalytic Electrodes by AC Plasma Deposition and Electrochemical Detection of Hydrogen Peroxide

Contact Info

Product

Resources

About

Plasma induced tungsten doping of TiO2 particles for enhancement of photocatalysis under visible light

Cited by 20 publications

References 20 publications

Sputtering onto a liquid: interesting physical preparation method for multi-metallic nanoparticles

Sputtering onto a liquid: interesting physical preparation method for multi-metallic nanoparticles

Noble metal-titania hybrid nanoparticle clusters and the interaction to proteins for photo-catalysis in aqueous environments

Facile Fabrication of Metal Oxide Based Catalytic Electrodes by AC Plasma Deposition and Electrochemical Detection of Hydrogen Peroxide

Contact Info

Product

Resources

About

Plasma induced tungsten doping of TiO₂ particles for enhancement of photocatalysis under visible light