Visible-light-driven photocatalytic H2 evolution from water splitting with band structure tunable solid solution (AgNbO3)1−x(SrTiO3)x

Zhao, Weirong; Ai, Zhuyu; Zhu, Xinxin; Zhang, Meng; Shi, Qiaomeng; Dai, Jiusong

doi:10.1016/j.ijhydene.2014.03.102

Cited by 28 publications

(19 citation statements)

References 51 publications

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“…To quantify the photoresponse of S 0 , S 0.2 , S 0.5 , S 1 , S 2 , and S 5 , IPCE measurements at 1.2 eV vs Ag/AgCl as the reference electrode are presented in Fig 9 . IPCE can be expressed as follows: [ 46 , 47 ] where λ , φ , and I p denote the wavelength of the incident light (nm), the illumination power (mW cm -2 ), and the photocurrent density (mA cm -2 ) measured at the corresponding wavelength, respectively.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Hydrogen Evolution in the Presence of Plasmonic Au-Photo-Sensitized g-C3N4 with an Extended Absorption Spectrum from 460 to 640 nm

Xie

Zhang

et al. 2016

PLoS ONE

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Extensively spectral-responsive photocatalytic hydrogen production was achieved over g-C3N4 photo-sensitized by Au nanoparticles. The photo-sensitization, which was achieved by a facile photo-assisted reduction route, resulted in an extended spectral range of absorption from 460 to 640 nm. The photo-sensitized g-C3N4 (Au/g-C3N4) photocatalysts exhibit significantly enhanced photocatalytic hydrogen evolution with a TOF value of 223 μmol g-1 h-1, which is a 130-fold improvement over g-C3N4. The hydrogen production result confirms that Au nanoparticles are effective photo-sensitizers for the visible light-responsive substrate g-C3N4. UV–vis diffuse reflection spectra (DRS), photoluminescence spectra (PL), electron spin resonance (ESR), and electrochemical measurements were used to investigate the transfer process of photogenerated electrons. The optimal Au/g-C3N4 photocatalyst displays the lowest charge transfer resistance of 18.45 Ω cm-2 and a high electron transfer efficiency, as determined by electrochemical impedance spectroscopy (EIS). The photo-sensitized g-C3N4 shows a broad range of response to visible light (400–640 nm), with significantly high incident photon-to-current efficiency (IPCE) values of 14.52%, 2.9%, and 0.74% under monochromatic light irradiation of 400, 550, and 640 nm, respectively. ESR characterization suggests that Au nanoparticles are able to absorb visible light of wavelengths higher than 460 nm and to generate hot electrons due to the SPR effect.

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Section: Resultsmentioning

confidence: 99%

Enhanced Hydrogen Evolution in the Presence of Plasmonic Au-Photo-Sensitized g-C3N4 with an Extended Absorption Spectrum from 460 to 640 nm

Xie

Zhang

et al. 2016

PLoS ONE

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“…Argon was used as carrier gas at a flow rate of 30 cm 3 /min. In a typical experiment, 50 mg of fresh photocatalyst was suspended in 17.5 mL distilled water and 7.5 mL methanol, used as a hole scavenger [19,22,35,36]. The suspension was then placed in the reactor and an argon flow of 30 mL/min was applied until the system was free of oxygen, monitored by the GC analysis.…”

Section: 4photocatalytic Hydrogen Evolution Reaction Testmentioning

confidence: 99%

“…Regarding the role of methanol, it is used in the present study as sacrificial agent and hole scavenger [19,35,36]. During the photocatalytic process, the excited electrons partially migrate to the active surface sites, producing adsorbed hydrogen atoms ( 456 • ).…”

Section: Photocatalytic Performance Of the Samplesmentioning

confidence: 99%

Photocatalytic properties of TiO2 and Fe-doped TiO2 prepared by metal organic framework-mediated synthesis

Valero-Romero

Santaclara

Oar‐Arteta

et al. 2019

Chemical Engineering Journal

150

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The Ti-containing metal organic framework (MOF) MIL-125 has been used as sacrificial precursor to obtain TiO2 materials through the MOF-mediated synthesis route. In this study, Fe 3+ was deposited on the surface of MIL-125 after its hydrothermal synthesis. Targeted Fe-doped titania photocatalysts were prepared through the direct calcination in air of Fe/MIL-125 crystals and/or by using a two-step method, including carbonization in inert atmosphere followed by calcination in air. The relationship between the synthesis conditions and the properties of the Fe-doped titania nanopowders, such as Fe content, porosity, phase composition and particle size was investigated.From elemental mapping, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, UV-Vis absorption spectroscopy and photoluminescence emission spectra, the presence of highly dispersed Fe 3+ ions incorporated into the TiO2 crystal lattice was confirmed, which led to a significant red shift of photoresponse towards visible light and reduced the recombination rate of electron-hole pairs at low iron content. By varying the pre-carbonization temperature, both crystal size and phase composition in the final materials were modulated. The performance of Fe-doped titania materials in photocatalytic water-splitting was tested for hydrogen evolution. Optimal photocatalytic performance was found at 0.15 and 0.5 wt. % iron concentration and exceeded those of non-doped titania and commercial anatase both under visible and UV light irradiation, respectively, and among the highest reported in literature for these systems.

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“…In the photocatalytic activity test, 0.1 g of sample was ultrasonically dispersed in 50 mL of methanol aqueous solution (30% v/v) in a quartz reactor, in which methanol acted as a hole scavenger [32,33]. The quartz reactor was sealed and purged with pure argon gas to obtain a pure argon atmosphere.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Direct microwave–hydrothermal synthesis of Fe-doped titania with extended visible-light response and enhanced H2-production performance

Zhao

Zhang

et al. 2016

Chemical Engineering Journal

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Visible-light-driven photocatalytic H2 evolution from water splitting with band structure tunable solid solution (AgNbO3)1−x(SrTiO3)x

Cited by 28 publications

References 51 publications

Enhanced Hydrogen Evolution in the Presence of Plasmonic Au-Photo-Sensitized g-C3N4 with an Extended Absorption Spectrum from 460 to 640 nm

Enhanced Hydrogen Evolution in the Presence of Plasmonic Au-Photo-Sensitized g-C3N4 with an Extended Absorption Spectrum from 460 to 640 nm

Photocatalytic properties of TiO2 and Fe-doped TiO2 prepared by metal organic framework-mediated synthesis

Direct microwave–hydrothermal synthesis of Fe-doped titania with extended visible-light response and enhanced H2-production performance

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