Photocatalytic activity of hydrogen production from water over TiO2 with different crystal structures

Wang, Qizhao; Lian, Juhong; Bai, Yan; Hui, Juan; Zhong, Jianxin; Li, Jianzhang; An, Ning; Yu, Jie; Wang, Fangping

doi:10.1016/j.mssp.2015.06.089

Cited by 37 publications

(14 citation statements)

References 37 publications

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“…The most popular one deals with the charge carriers' transfer between different phases, resulting in the inhibition of charge carriers' recombination, which is commonly named the "synergistic effect" [74,81,82]. Although usually electrons' transfer from anatase to rutile has been proposed, due to the more negative CB of anatase than that of rutile [83][84][85][86][87][88][89][90], some reports have claimed an opposite direction of charges' migration, e.g., (i) holes from an anatase core to a rutile overlayer and opposite electron transfer [82], and (ii) electrons from rutile to lattice trapping sites in anatase [75,81,91,92]. Mi and Weng have proposed five possible band alignments in mixed-phase (anatase/rutile) titania, as shown in Figure 3 [93].…”

Section: Photocatalytic Activity Of Titania Polymorphsmentioning

confidence: 99%

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

et al. 2019

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Titania photocatalysts have been intensively examined for both mechanism study and possible commercial applications for more than 30 years. Although various reports have already been published on titania, including comprehensive review papers, the morphology-governed activity, especially for novel nanostructures, has not been reviewed recently. Therefore, this paper presents novel, attractive, and prospective titania photocatalysts, including zero-, one-, two-, and three-dimensional titania structures. The 1D, 2D, and 3D titania structures have been mainly designed for possible applications, e.g., (i) continuous use without the necessity of particulate titania separation, (ii) efficient light harvesting (e.g., inverse opals), (iii) enhanced activity (fast charge carriers' separation, e.g., 1D nanoplates and 2D nanotubes). It should be pointed out that these structures might be also useful for mechanism investigation, e.g., (i) 3D titania aerogels with gold either incorporated inside the 3D network or supported in the porosity, and (ii) titania mesocrystals with gold deposited either on basal or lateral surfaces, for the clarification of plasmonic photocatalysis. Moreover, 0D nanostructures of special composition and morphology, e.g., magnetic(core)-titania(shell), mixed-phase titania (anatase/rutile/brookite), and faceted titania NPs have been presented, due to their exceptional properties, including easy separation in the magnetic field, high activity, and mechanism clarification, respectively. Although anatase has been usually thought as the most active phase of titania, the co-existence of other crystalline phases accelerates the photocatalytic activity significantly, and thus mixed-phase titania (e.g., famous P25) exhibits high photocatalytic activity for both oxidation and reduction reactions. It is believed that this review might be useful for the architecture design of novel nanomaterials for broad and diverse applications, including environmental purification, energy conversion, synthesis and preparation of "intelligent" surfaces with self-cleaning, antifogging, and antiseptic properties.

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Section: Photocatalytic Activity Of Titania Polymorphsmentioning

confidence: 99%

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

et al. 2019

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“…Next to the surface area the crystallite type also significantly impacts the resulting photocatalytic activity [10]. Amorphous TiO 2 is not photoactive [11].…”

Section: Of 14mentioning

confidence: 99%

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

et al. 2017

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Removing pollutants from water by using the photocatalyst TiO 2 is a highly-promising method. A large amount of work has been done to increase the activity of TiO 2 , whereas the main two findings are increasing the surface area and applying mixed phase modifications (anatase, brookite, and rutile). Here, we present a method to directly synthesize non-agglomerated TiO 2 nanoparticles with different crystal phase ratios via low temperature dissolution-precipitation (LTDRP) on a porous microfiltration membrane (polyethersulfone). The amount of hydrochloric acid and the temperature was varied between 0.1-1 M and 25-130 • C, respectively, while the concentration of titanium precursor (titanium(IV) isopropoxide) was kept unchanged. The TiO 2 nanoparticles and the membrane were thoroughly characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), measuring the water contact angle and permeation flux, and examining the degradation of methylene blue. The mixed phase anatase/brookite with a main component being anatase exhibited the highest photocatalytic activity in removing methylene blue. Higher synthesis temperature induces enhanced crystallinity and, subsequently, the degradation rate of methylene blue was improved. Additionally, the photocatalytic activity remains high and unchanged for up to nine repeated cycles, i.e., full recovery of the photocatalytic properties is sustained.

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“…tures at present time. TiO 2 has been widely studied essentially for its low cost, earth-abundance, nontoxicity, stability and, resistance to photocorrosion, in single-or mix-phase [244][245][246] , in combination with other co-catalysts (Cu-Pt, Au-Cu) [247][248][249] , selectively co-deposited on different facets (Co 3 O 4 on {001} and Pt on {101}) [250] , or dispersed and immobilized in zeolite or silicate frameworks [251,252] . However, due to its wide band gap, its ability to absorb visible light is limited.…”

Section: Pec Combining (Photo) Cathodes For Co 2 Reduction With (Photo) Anodes For O 2 Evolutionmentioning

confidence: 99%

Semiconductor, molecular and hybrid systems for photoelectrochemical solar fuel production

Passalacqua

Perathoner

Centi

2017

Journal of Energy Chemistry

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Photocatalytic activity of hydrogen production from water over TiO2 with different crystal structures

Cited by 37 publications

References 37 publications

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Semiconductor, molecular and hybrid systems for photoelectrochemical solar fuel production

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