An insight into the trifunctional roles of Cu2(OH)2CO3 cocatalyst in boosting the photocatalytic H2 evolution activity over Zn0.5Cd0.5S nanoparticles

Liu, Yumin; Ren, Hao; Lv, Hua; Gong, Zhiyuan; Cao, Yafei

doi:10.1016/j.apsusc.2019.04.148

Cited by 37 publications

(25 citation statements)

References 66 publications

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“…The MCM‐41 specific area is 1275 m 2 /g, close to the value found by Cakirylmaz et al and Nejat et al 3,12 According to Table 1 of textural analysis it was possible to see a decrease in the catalyst specific area due to the metal impregnation method 1,4,10,29 . Unlike the specific area, pore diameter increased after metal impregnation, caused by clogging of smaller pores and subsequently increasing the mean particle diameter 27,31 .…”

Section: Resultssupporting

confidence: 81%

“…Figure 5 shows the high resolution XPS spectra for the Cu 2p 3/2 , O 1 s, Ti 2p, and Si 2p regions collected from the samples 1%Cu/20%TiO 2 /MCM‐41 and 20%TiO 2 /MCM‐41. As expected, the copper signal was only observed for the sample containing 1% of Cu, and the chemical components related to Cu +2 (934.5 eV) and Cu +1 (932.1 eV) 10,13,52 were found at the Cu 2p 3/2 region. Based on the fitting results, one may infer that Cu +1 corresponds to 94% of the copper species located at the catalyst surface.…”

Section: Resultssupporting

confidence: 80%

“…In both systems, the catalysts were dispersed in an aqueous ethanol solution (10%), corresponding to an excess of sacrificial agent, 10 at a catalyst concentration of 1 g/L (Dp < 0.35 mm). The catalysts compositions were 1%Me/20%TiO 2 /MCM‐41 (Me = Ag, Co, Cu, Ni) and their syntheses are placed at Supplementary Material.…”

Section: Photocatalytic Reactionmentioning

confidence: 99%

“…Active phase and supports may have a cooperative effect on the reactions employed, however, there is a concentration of the active phase and a concentration of the impregnated catalyst that is considered ideal for application. Ideal catalyst concentrations are an important factor for photocatalytic reactions, as catalyst insufficiency and excess can compromise not only reaction efficiency but the material and operating costs 6,8,10,19,20,27,31 …”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic water splitting with noble‐metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs

Vicentini

Manieri

Subtil

et al. 2020

Env Prog and Sustain Energy

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Here, the authors (i) discuss the most prominent co‐catalyst for H2 generation structured in the form of Me‐TiO2/MCM‐41 (Me: Ag, Co, Cu, Ni) based on structural, electronic, textural, morphological and optical characterization techniques, such as XRD, wide and small angle, XPS, Fourier‐transform infrared spectroscopy, scanning electron microscopy, B.E.T., textural analysis, photoacoustic spectroscopy and photoluminescence spectroscopy; and (ii) evaluate the difference in hydrogen production in two distinct geometric reactors based on a theoretical study of light distribution inside the reactors supported by the experimental quantum yield calculation. As a result, copper‐doped photocatalyst generated higher hydrogen amount compared to the others. The high photocatalyst performance was due to the greater lamp spectrum absorption, marked by the low bandgap value, and high photoactivity justified by the low rate of electronic recombination. The hydrogen generation in the quartz reactor was seven times higher than the annular one, and when at maximum light power, it is comparable to the most sophisticated reaction systems found in literature. The larger light exposure area per unit volume of the quartz reactor compared to the annular one is the reason why it obtained better results due to the lower emitted photon blockade, with a 1.81% apparent quantum yield.

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Section: Resultssupporting

confidence: 81%

Section: Resultssupporting

confidence: 80%

Section: Photocatalytic Reactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photocatalytic water splitting with noble‐metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs

Vicentini

Manieri

Subtil

et al. 2020

Env Prog and Sustain Energy

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“…The parameters of emission decay of the samples as the shownTable 2 . It was clearly observed that K ET and η inj value of MCNS-10 were larger than that MCS and other composite catalysts, indicating that NiSe 2 acted as electron traps can effectively capture electrons attached on the surface of MCS [6,45,46]. Further, three dimensional topography of NiSe 2 exposed more active sites and improved the separation efficiency of electrons and hole pairs.…”

Section: The Pl and Trpl Spectramentioning

confidence: 96%

Rational design of 0D Mn0.05Cd0.95S anchored on 3D NiSe2 nanoparticles for efficient photocatalytic hydrogen production

Liu¹,

Yan²,

Ma³

et al. 2020

Preprint

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A novel effective 0D/3D nanohybrids of Mn0.05Cd0.95S/NiSe2 photocatalysts, which are formed by Mn0.05Cd0.95S nanoparticles anchored on the outer surface of cubic NiSe2 in designed and prepared. The optimum hydrogen evolution rate of the Mn0.05Cd0.95S/NiSe2 composite is 14.3 mmol h-1 g-1, which is 7.5 times higher than that of single Mn0.05Cd0.95S. Structural analyses and experimental results reveal that a little amount of NiSe2 can remarkably improve the photocatalytic activity and the close contact of the 0D/3D composite catalyst also plays an important role. Furthermore, NiSe2 can not only as both an electron acceptor to capture electrons and inhibit the recombination of electron-hole pairs, but also provide sufficient active sites to facilitate the photocatalytic water-splitting reaction activity. This work demonstrates that low-cost NiSe2 is a promising co-catalyst for photocatalytic splitting of water to produce hydrogen.

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Recent Developments in the Design of Cd_xZn_1−xS‐Based Photocatalysts for Sustainable Production of Hydrogen

2021

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Photocatalytic production of clean fuel hydrogen (H2) from water using semiconductor nanomaterials as photocatalysts aided by natural sunlight represents a promising means to fulfill the growing energy demand and for mitigating increasing concentration of atmospheric CO2 due to the burning of fossil fuels. Among the widely studied semiconductor nanomaterials, the CdxZn1−xS ternary system has gained significant interest due to its tunable band edge, optical and electronic properties by merely varying the Cd2+/Zn2+ content. Consequently, CdxZn1−xS‐based nanostructures have been extensively studied as promising visible‐light‐active photocatalysts for H2 production from water and other photocatalytic transformations. Herein, a comprehensive account of the research progress in the development of CdxZn1−xS‐based photocatalysts for the production of solar fuel, H2 from water is provided. Further, various strategies used in enhancing the photocatalytic activity of CdxZn1−xS photocatalysts, like control of the morphology (0D, 1D, 2D, and 3D), bandgap engineering, and fabrication of various heterostructures have been discussed in detail. Furthermore, opportunities and future perspectives of CdxZn1−xS‐based photocatalysts for practical applications have also been discussed. Overall, the importance of CdxZn1−xS‐based photocatalysts is showcased for efficient visible‐light‐driven hydrogen production and can be beneficial for the design of sustainable photocatalytic systems.

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An insight into the trifunctional roles of Cu2(OH)2CO3 cocatalyst in boosting the photocatalytic H2 evolution activity over Zn0.5Cd0.5S nanoparticles

Cited by 37 publications

References 66 publications

Photocatalytic water splitting with noble‐metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs

Photocatalytic water splitting with noble‐metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs

Rational design of 0D Mn0.05Cd0.95S anchored on 3D NiSe2 nanoparticles for efficient photocatalytic hydrogen production

Recent Developments in the Design of Cd_xZn_1−xS‐Based Photocatalysts for Sustainable Production of Hydrogen

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An insight into the trifunctional roles of Cu2(OH)2CO3 cocatalyst in boosting the photocatalytic H2 evolution activity over Zn0.5Cd0.5S nanoparticles

Cited by 37 publications

References 66 publications

Photocatalytic water splitting with noble‐metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs

Photocatalytic water splitting with noble‐metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs

Rational design of 0D Mn0.05Cd0.95S anchored on 3D NiSe2 nanoparticles for efficient photocatalytic hydrogen production

Recent Developments in the Design of CdxZn1−xS‐Based Photocatalysts for Sustainable Production of Hydrogen

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Recent Developments in the Design of Cd_xZn_1−xS‐Based Photocatalysts for Sustainable Production of Hydrogen