Sunlight-driven water-splitting using two-dimensional carbon based semiconductors

Kumar, Pawan; Boukherroub, Rabah; Shankar, Karthik

doi:10.1039/c8ta02061b

Cited by 234 publications

(114 citation statements)

References 446 publications

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“…The photocatalytic performance increases with the decrease of thickness of 2D BiOCl x Br 1‐x nanosheets. According to the diffusion equation:

true normalt = normald^{2} / normalk^{2} normalD

…”

Section: Resultsmentioning

confidence: 99%

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Leng

et al. 2019

ChemistrySelect

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Promoting the separation of electrons and holes for photocatalysis is still challenging. In this paper, alloyed BiOCl x Br 1-x nanosheets are synthesized to enhance the separation of electrons and holes by means of adjusting the thickness and the exposing specific crystal facet of nanosheet. SEM shows that the average thicknesses of samples are in the range of 34.7 to 47.2 nm. TEM analysis demonstrates that alloyed nanosheets obtained by codeposition method at room temperature have an exposure of (001) facet. Compared with pure BiOCl or BiOBr nanosheets, BiOCl x Br 1-x nanosheets exhibit a greatly enhanced photocatalytic activity for degrading RhB. In addition, BiOCl 0.5 Br 0.5 (BC5) sample with nanosheet thickness of 34.7 nm displays the highest photocatalytic activity, which is 17-time higher than that of pure BiOCl or BiOBr nanosheets. The superior photoactivity of BiOCl x Br 1-x nanosheets is attributed to the diverse light absorption, alloyed effect and different diffusion distance along [001] orientation. This study presents a 2D photocatalyst for degrading toxic pollutants to remedy environmental pollution. The revealing about the effect of thickness on photocatalytic properties could provide a new method to study the photoelectric properties related to 2D nanomaterials.[a] X.

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“…The photocatalytic performance increases with the decrease of thickness of 2D BiOCl x Br 1‐x nanosheets. According to the diffusion equation:

true normalt = normald^{2} / normalk^{2} normalD

…”

Section: Resultsmentioning

confidence: 99%

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Leng

et al. 2019

ChemistrySelect

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show abstract

“…The Mott-Schottky (M-S) plots were performed to further analyze the electron transfer characteristic of the samples ( Figure 8E and F). The VB potential of rGO is confirmed as 2.13 eV by XPS VBs analysis, and it is well known that the HOMO of rGO is very close to its LUMO, 84,85 so that its π→π* transition can easily be induced by visible-light. Hereby, the positive slope of rGO and negative slope of AgBr make them into the typical electron-rich donor and electron-deficient receptor.…”

Section: Catalytic Mechanismmentioning

confidence: 81%

“…82,83 Based on aforementioned research, the VLD catalytic mechanism of rGAA-α catalyst was confirmed to be the model as Figure 9. The VB potential of rGO is confirmed as 2.13 eV by XPS VBs analysis, and it is well known that the HOMO of rGO is very close to its LUMO, 84,85 so that its π→π* transition can easily be induced by visible-light. For the closer VB potential (1.64 eV) of AgBr with LUMO orbital of rGO, the typical electron transfer model of Z-scheme heterointerface can be formed between AgBr and rGO, which is also verified by M-S analysis.…”

Section: Catalytic Mechanismmentioning

confidence: 81%

“…Therefore, energy problem is extremely urgent, and how to effectively alleviate the energy pressure is becoming a global challenge. 17 For instance, Hu et al 18 prepared an iron doped g-C 3 N 4 multiphase catalyst to clean complex wastewater. Among them, hydrogen energy is an ideal substitute for the advantages of easy to store and transport, high energy storage, highusage and green sustainability.…”

Section: Introductionmentioning

confidence: 99%

“…Fujishima and Honda proposed to use titanium dioxide photoelectrode to catalyze water splitting under light in 1972, then photocatalytic technology has attracted more attentions and been widely studied for its advantages of low cost and no pollution. 17 For instance, Hu et al 18 prepared an iron doped g-C 3 N 4 multiphase catalyst to clean complex wastewater. By controlling Ru weight and load, Yan et al 19 prepared a Ru/Al 2 O 3 catalyst with different Ru structure and configuration to accelerate the hydrogen production rate.…”

Section: Introductionmentioning

confidence: 99%

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High photoresponse and fast carrier mobility: Two‐dimensional rGO‐AgBr/Ag composite based on Z‐scheme heterointerface with plasma for hydrogen evolution

Wang

et al. 2019

Int J Energy Res

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With the improvement of people's living standard, energy shortage is increasingly severe. Photocatalysis technology is one of the most effective means to solve this problem. Generally, poor visible-light response and fast combination of photo-induced carriers are the main limiting factors to traditional photocatalysts. Aiming at this problem, in this paper, AgBr was used as the photosensitizer to immobilize on the surface of reduced graphene oxide (rGO) for the complexation of Ag + ions and carboxyl groups of precursor graphene oxide (GO), then the two-dimensional rGO-AgBr/Ag composites (2D rGAA-α, α = 1, 2 and 3) were synthesized by solvothermal method. The structures, morphologies, chemical bonding states and photoelectrochemical properties of the samples were analyzed to study the samples, and the corresponding visible-light-driven (VLD) catalytic performances were studied by hydrogen evolution reaction (HER). Compared with pure rGO, the light absorption of rGAA-α was almost extended to full spectral range for the Zscheme heterointerface (rGO-AgBr) construction, and the separation of photo-induced carriers can be promoted effectively. The HER results showed that the average hydrogen evolution rate ( R p ) of rGAA-α was significantly increased, and the rGAA-2 catalyst presented the highest R p (72.71 μmol h -1 g -1 ). After six recycling experiments, the very faint activity decrease and unobvious structure change suggested the high photostability. Accordingly, the enhanced catalytic activity of rGAA-α catalysts was attributed to the formation of Z-scheme heterointerface and generation of Ag plasmas, so this study will provide a simple, effective and promising method for hydrogen energy development. FIGURE 9 VLD photocatalytic mechanism of rGAA-α photocatalyst for HER [Colour figure can be viewed at wileyonlinelibrary.com]

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Hybrid Materials forCO₂Reduction and H₂Generation

Thakur

Devi

2022

Green Energy Harvesting

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Sunlight-driven water-splitting using two-dimensional carbon based semiconductors

Abstract: 2D carbon semiconductors and composites are highly promising photocatalysts.

Cited by 234 publications

References 446 publications

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

High photoresponse and fast carrier mobility: Two‐dimensional rGO‐AgBr/Ag composite based on Z‐scheme heterointerface with plasma for hydrogen evolution

Hybrid Materials forCO₂Reduction and H₂Generation

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Sunlight-driven water-splitting using two-dimensional carbon based semiconductors

Abstract: 2D carbon semiconductors and composites are highly promising photocatalysts.

Cited by 234 publications

References 446 publications

Effect of Alloyed BiOClxBr1‐x Nanosheets Thickness on the Photocatalytic Performance

Effect of Alloyed BiOClxBr1‐x Nanosheets Thickness on the Photocatalytic Performance

High photoresponse and fast carrier mobility: Two‐dimensional rGO‐AgBr/Ag composite based on Z‐scheme heterointerface with plasma for hydrogen evolution

Hybrid Materials forCO2Reduction and H2Generation

Contact Info

Product

Resources

About

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Hybrid Materials forCO₂Reduction and H₂Generation