Optical porous hollow-boxes assembled by SrSO4/TiO2/Pt nanoparticles for high performance of photocatalytic H2 evolution

Wang, Zhao; Yang, Qi; Liu, Wenlin; Ran, Hao; Zhang, Cuiling; Han, Xiangyu; He, Xiaoyu; Wang, Xue; Hu, Chenguo

doi:10.1016/j.nanoen.2019.02.008

Cited by 34 publications

(15 citation statements)

References 38 publications

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“…Figure 2d X-ray photoelectrons pectroscopy (XPS) was appliedt od iscuss the compositiona nd elemental valence state of the SrTiO 3 /SrSO 4 heterojunction and pristineS rTiO 3 .F igure 3a presents the Ti 2p orbit spectra, which shows characteristicp eaks at 458.1 eV and 463.8 eV corresponding to Ti 2p 1/2 and Ti 2p 3/2 of Ti 4 + in SrTiO 3 /SrSO 4 ,r espectively. [12] Additionally,t he Ti 4 + in [9,12] These two new peaks are relatedt ot he Sr ions binding with SO 4…”

Section: Resultsmentioning

confidence: 92%

“…Compared with other methods, as ol-gel procedure is facile and conducted at ambient environments instead of high-temperature or high-pressurec onditions. [9] In this work, SrTiO 3 /SrSO 4 heterojunctions were obtained by combining a sol-gel method and annealing process under ar elativelym oderate temperature. By adding the environmentally friendly precursor of l-cysteine, aw ell-defined SrTiO 3 /SrSO 4 heterojunction can be formed with good interfacial contact, which is conducive to the photocatalytic reaction.…”

Section: Introductionmentioning

confidence: 99%

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Designed Construction of SrTiO₃/SrSO₄/Pt Heterojunctions with Boosted Photocatalytic H₂ Evolution Activity

Cai

Wei

Zhang

et al. 2021

Chemistry A European J

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Efficient separation of photogenerated electronhole pairs is ac rucial factor for high-performance photocatalysts. Effective electron-hole separation and migration could be achieved by heterojunctionsw ith suitable band structures. Herein, ap orous SrTiO 3 /SrSO 4 heterojunction is prepared by as ol-gel method at room temperature followed by an annealing process. XRD characterizations uggests high crystallinity of the heterostructure. Aw ell-defined interface between the two phases is confirmed by high-resolution (HR)TEM. The photocatalytic H 2 evolution productivity of the SrTiO 3 /SrSO 4 heterojunction with Pt as co-catalyst reaches 396.82 mmol g À1 h À1 ,w hich is 16 times higher than that of SrTiO 3 /Pt. The boosted photocatalytic activity of SrTiO 3 / SrSO 4 /Pt can be ascribed to the presence of SrSO 4 ,w hich promotes the transfer and migration of photogenerated carriers by forming the heterojunction and porous structure, which provides al arge amount of active sites. This novel poroush eterostructure brings new ideas for the development of high-efficiency photocatalystsfor H 2 release.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Designed Construction of SrTiO₃/SrSO₄/Pt Heterojunctions with Boosted Photocatalytic H₂ Evolution Activity

Cai

Wei

Zhang

et al. 2021

Chemistry A European J

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“…Besides, it is necessary to compare TMCs with the recent achievements of TiO 2 -based materials for photocatalytic H 2 production. Based on the reported works, such as SrSO 4 /TiO 2 /Pt (10.5 mmol·h −1 ·g −1 ) (Wang et al., 2019), Pt 0 and oxidized Pt 2+ -modified TiO 2 nanosheets (20.88 mmol·h −1 ·g −1 ) (Jin et al., 2017), Bi 2 O 3 @TiO 2 nanotubes (26.02 mmol·h −1 ·g −1 ) (Lakshmana Reddy et al., 2017), Cu(II) pre-grafted Pt/TiO 2 (27.2 mmol·h −1 ·g −1 ) (Dozzi et al., 2017), C/TiO 2 nanotube/carbon nanotubes (37.6 mmol·h −1 ·g −1 ) (Zhao et al., 2014), and Mg-reduced black TiO 2 (43 mmol·h −1 ·g −1 ) (Sinhamahapatra et al., 2015), whether or not the photocatalytic hydrogen production rate of TMC samples is the highest, considering the simplicity, environment friendliness, low-cost, and high yield of the synthesis method, TMC photocatalysts still have great advantages. Figure 3B shows repeated, photocatalytic water splitting experiments for the TMC2 photocatalyst under AM 1.5 G illumination, which exhibits a good durability without a significant drop in activity; even after the fifth cycle (25 h), the hydrogen production efficiency loss is less than 5%.…”

Section: Resultsmentioning

confidence: 99%

Solid-State, Low-Cost, and Green Synthesis and Robust Photochemical Hydrogen Evolution Performance of Ternary TiO2/MgTiO3/C Photocatalysts

et al. 2019

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Summary Solar-driven photochemical hydrogen evolution is a promising route to sustainable hydrogen fuel production. Large-scale preparation of highly active photocatalysts using elementally abundant and less-expensive materials is urgently required for widespread practical application. Here, we report a highly efficient and low-cost TiO 2 /MgTiO 3 /C heterostructure photocatalyst for photochemical water splitting, which was synthesized on gram scale via a facile mechanochemical method. The heterostructure and carbon sensitization offer excellent photoconversion efficiency as well as good photostability. Under irradiation of one AM 1.5G sunlight, the optimal TiO 2 /MgTiO 3 /C photocatalyst can show a great solar-driven hydrogen evolution rate (33.3 mmol·h −1 ·g −1 ), which is much higher than the best yields ever reported for MgTiO 3 -related photocatalysts or pure TiO 2 (P-25). We hope this work will attract more attention to inspire further work by others for the development of low-cost, efficient, and robust photocatalysts for producing hydrogen in artificial photosynthetic systems.

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“…And some remarkable achievements have been obtained. Compared with the solid materials, the porous and hollow structures have been extensively investigated because of their widespread promising application scenarios in multiple areas, for example catalysis, 16 molecular separation, 17 photonics, 18 and gas sensors. 19 In general, the preparation of hollow structure utilizes the removable or sacricial hard and so templates, 20,21 which limits the crystallization, the grain size-distribution and the purity of products because of the high temperature heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of porous BiVO₄hollow spheres with improved visible-light photocatalytic properties

Mao

Tao

et al. 2020

RSC Adv.

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Bismuth vanadate (BiVO 4 ) hollow spheres with porous structure have been successfully fabricated by a onestep wet solution method with no surfactant and template. The structure, morphologies, and composition of the as-prepared products were studied with X-ray powder diffraction (XRD), transmission electron morphology (TEM), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS) and UV-vis spectroscopy. Based upon the time-dependent experimental results, BiVO 4 nanospheres with hollow and solid structures can be controlled effectively through the reaction time, and a reasonable formation process was suggested in this work. Moreover, the experiment of degrading methyl orange (MO) under visible-light illumination was conducted to evaluate the photocatalytic performance of the obtained BiVO 4 samples. The porous BiVO 4 hollow spheres exhibit superior visible-light photocatalytic properties for MO degradation than other photocatalysts under irradiation, and could be reused for up to five times without significant reduction in the photocatalytic activity. In addition, based on active group trapping experiments, cOH radicals as the main active species from H 2 O 2 molecules play a vital role in the photocatalytic degradation of MO, and a photocatalytic mechanism for the BiVO 4 system was proposed. High photocatalytic activity, universality and stability suggest that the porous BiVO 4 hollow spheres may have potential applications in wastewater treatment. † Electronic supplementary information (ESI) available: (1) SEM images of BiVO 4 hollow spheres; (2) XPS spectra; (3) SEM images of BiVO 4 solid spheres; (4) XRD patterns; (5) effect of H 2 O 2 amount on photocatalytic degradation rate of MO in the presence of BiVO 4 hollow spheres; (6) PL spectra. SeeFig. 5 (a) Absorption spectra of MO aqueous solutions in the presence of BiVO 4 hollow spheres, (b) degradation rate of MO at different intervals and (c) pseudo-first-order kinetic plots of MO in the presence of various photocatalysts.This journal is

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Optical porous hollow-boxes assembled by SrSO4/TiO2/Pt nanoparticles for high performance of photocatalytic H2 evolution

Cited by 34 publications

References 38 publications

Designed Construction of SrTiO₃/SrSO₄/Pt Heterojunctions with Boosted Photocatalytic H₂ Evolution Activity

Designed Construction of SrTiO₃/SrSO₄/Pt Heterojunctions with Boosted Photocatalytic H₂ Evolution Activity

Solid-State, Low-Cost, and Green Synthesis and Robust Photochemical Hydrogen Evolution Performance of Ternary TiO2/MgTiO3/C Photocatalysts

Facile fabrication of porous BiVO₄hollow spheres with improved visible-light photocatalytic properties

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Optical porous hollow-boxes assembled by SrSO4/TiO2/Pt nanoparticles for high performance of photocatalytic H2 evolution

Cited by 34 publications

References 38 publications

Designed Construction of SrTiO3/SrSO4/Pt Heterojunctions with Boosted Photocatalytic H2 Evolution Activity

Designed Construction of SrTiO3/SrSO4/Pt Heterojunctions with Boosted Photocatalytic H2 Evolution Activity

Solid-State, Low-Cost, and Green Synthesis and Robust Photochemical Hydrogen Evolution Performance of Ternary TiO2/MgTiO3/C Photocatalysts

Facile fabrication of porous BiVO4hollow spheres with improved visible-light photocatalytic properties

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Designed Construction of SrTiO₃/SrSO₄/Pt Heterojunctions with Boosted Photocatalytic H₂ Evolution Activity

Designed Construction of SrTiO₃/SrSO₄/Pt Heterojunctions with Boosted Photocatalytic H₂ Evolution Activity

Facile fabrication of porous BiVO₄hollow spheres with improved visible-light photocatalytic properties