High performance visible light responsive photocatalysts for environmental cleanup via solution processing

Sato, Tsugio; Zhang, Peilin; Yin, Shu

doi:10.1016/j.pcrysgrow.2012.02.001

Cited by 11 publications

(3 citation statements)

References 15 publications

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“…Besides, the photoinduced electron in the conduction band would form ·O 2 − in the presence of oxygen. In addition, the detailed destruction mechanism of NO species by photocatalyst has been investigated by some researchers4849505152. The characterization system in the present research was quite similar to that of the Japanese Industrial Standard which was established at the beginning of 200454.…”

Section: Discussionmentioning

confidence: 67%

UV, visible and near-infrared lights induced NOx destruction activity of (Yb,Er)-NaYF4/C-TiO2 composite

Yin

Dong

et al. 2013

Sci Rep

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Titanium dioxide (TiO2) is a well-known photocatalyst for environmental cleaning and energy conversion. However, it can only be excited by ultraviolet light for photocatalysis due to its wide band gap (3.2 eV). In this paper, we present a novel (Yb,Er)-NaYF4/C-TiO2 composite which can be perfectly induced not only by ultraviolet light but also weak visible and near infrared lights, owing to the increased carbon doping contents and optimal energy transfer between up-conversion phosphor and C doped TiO2 compared with that of solely C-TiO2. Consequently, the (Yb,Er)-NaYF4/C-TiO2 composite can present the outstanding continuous NOx gas destruction ability under the irradiation of ultraviolet, weak visible and infrared lights much superior to pure C-TiO2, P25 titania and even that of (Yb,Er)-NaYF4/N-TiO2 composite, due to the nice synergetic effect of (Yb,Er)-NaYF4 and C-TiO2, indicating a promising potential in the photocatalyst application with high efficiency of ultraviolet, visible and infrared lights induced photocatalysis simultaneously.

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Section: Discussionmentioning

confidence: 67%

UV, visible and near-infrared lights induced NOx destruction activity of (Yb,Er)-NaYF4/C-TiO2 composite

Yin

Dong

et al. 2013

Sci Rep

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“…It is well known that photocatalytic activity is strongly related with physical properties such as crystal phase, particle size, specific surface area (SSA), crystallinity, and morphology. 7) In order to improve the photocatalytic activity and realize additional novel applications, some green chemical/physical processes, such as solvothermal synthesis, mechanochemical doping and oxygen plasma treatment, are suggested for the photocatalytic materials synthesis.…”

Section: Advancement Of Photocatalystsmentioning

confidence: 99%

Creation of advanced optical responsive functionality of ceramics by green processes

Yin

2015

J. Ceram. Soc. Japan

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Various kinds of optical responsive ceramic nanomaterials and films were successfully synthesized by environmental friendly green processes, such as hydrothermal/solvothermal process, mechanochemical doping process, oxygen plasma treatment process and a water molecular controlled-release solvothermal process (WCRSP). The composites combined the high-sensitive anion doped photocatalysts with up-conversion or long afterglow phosphors showed excellent deNO x photocatalytic activity under UV/ visible/NIR light irradiation, or even after turning off light irradiation. The mixed valence state tungsten based homogeneous nanomaterials possessed excellent IR light responsive properties, implied their potential applications as smart window materials and photothermal ablation cancer therapy materials. Significant contributions are expected for the development of optical responsive functional materials by green processes.

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“…Among these applications, SrTiO 3 is a potential solution for providing green energy from hydrogen because its photoactivity splits water efficiently . Two common strategies have been used for improving the photocatalytic performance of SrTiO 3 : (1) modification of the energy gap from 3.2 to 2.4 eV; and (2) maximization of the reactive area (specific surface area) . So far, most research has focused on decreasing the energy gap of SrTiO 3 by doping with transition metals or nonmetals (e.g., Al, Ni, N, and S), but only a few studies have manipulated the specific surface area to control the photocatalytic property of SrTiO 3 .…”

Section: Introductionmentioning

confidence: 99%

Template‐Free Synthesis of Hollow Porous Strontium Titanate Particles

Tzeng

Shih

2014

J. Am. Ceram. Soc.

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Strontium titanate (SrTiO3) is a potential photocatalyst of H2 evolution for providing green energy. One of the main strategies for increasing the efficiency of H2 evolution is to increase the surface area of photocatalysts. In this study, spray pyrolysis was used because of its superior flexibility in morphological control. Three typical reactants, nitric acid, acetic acid, and citric acid, were added to Sr and Ti precursors to form various morphological SrTiO3 powders. The SrTiO3 powders were investigated by X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, focused ion beam technique, and the Brunauer–Emmett–Teller (BET) method to determine the phase composition, surface morphology, geometry, inner structure, and specific surface area, respectively. Four main morphologies of SrTiO3 particles, namely, porous, concave porous, wrinkled spherical, and hollow porous structures, were obtained. Among these powders, SrTiO3 particles prepared with citric acid had the highest surface area (46.9 m2/g) because of their hollow porous structure. Finally, the formation mechanisms of these four distinct SrTiO3 morphologies are discussed.

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High performance visible light responsive photocatalysts for environmental cleanup via solution processing

Cited by 11 publications

References 15 publications

UV, visible and near-infrared lights induced NOx destruction activity of (Yb,Er)-NaYF4/C-TiO2 composite

UV, visible and near-infrared lights induced NOx destruction activity of (Yb,Er)-NaYF4/C-TiO2 composite

Creation of advanced optical responsive functionality of ceramics by green processes

Template‐Free Synthesis of Hollow Porous Strontium Titanate Particles

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