Effect of work-function and morphology of heterostructure components on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1189" altimg="si391.svg"><mml:msub><mml:mrow><mml:mtext>CO</mml:mtext></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>reduction photo-catalytic activity of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1199" altimg="si11.svg"><mml:mrow><mml:msub><mml:mrow><mml:mtext>MoS</mml:mtext></mml:mrow><mml:mro

Singh, Shreya; Punia, Rajat; Pant, Kamal Kishore; Biswas, Pratim

doi:10.1016/j.cej.2021.132709

Cited by 51 publications

(14 citation statements)

References 95 publications

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“…Moreover, the Cu NPs between CVO and Cu 2 O could serve as an electron-conduction bridge and facilitate the electron migration from CB of CVO to VB of Cu 2 O (Figure b), giving rise to an enhanced charge separation rate. Such a charge-transfer pathway would lead to the accumulation of photoexcited holes in the VB of CVO with strong oxidation capacity and the photogenerated electrons in the CB of Cu 2 O with high reducing ability. − Subsequently, the holes remaining in the VB of CVO would oxidize the H 2 O molecules to produce H + and O 2 , and the photoexcited electrons in the CB of Cu 2 O would react with CO 2 to form CO and CH 4 . As compared to Cu 2 O/CVO, the CO and CH 4 yields of Cu 2 O/Cu/CVO were remarkably improved, which was presumably attributed to the increased visible-light harvesting ability and faster charge separation resulting in the excellent photocatalytic performance.…”

Section: Resultsmentioning

confidence: 99%

Z-Scheme Cu₂O/Cu/Cu₃V₂O₇(OH)₂·2H₂O Heterostructures for Efficient Visible-Light Photocatalytic CO₂ Reduction

Song

Zhao

Feng

et al. 2022

ACS Appl. Energy Mater.

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Developing Z-scheme heterojunction photocatalysts has been regarded as a feasible approach to enhance the charge carrier lifetimes without reducing their redox potentials. In this work, a Z-scheme Cu3V2O7(OH)2·2H2O/Cu/Cu2O (denoted as CVO/Cu/Cu2O) heterojunction was successfully fabricated for the first time and used as photocatalysts for CO2 reduction. It was demonstrated that successively loading metallic Cu and Cu2O nanoparticles (NPs) on the surface of CVO could significantly improve the photocatalytic performance of CVO, and the highest CO evolution rate of 6.97 μmol·g–1·h–1 was obtained over the optimized CVO/Cu/Cu2O, which was 25.6 and 2.3 times higher than those of CVO and CVO/Cu2O, respectively. Moreover, CVO/Cu/Cu2O maintained a high stability even after five cycle reactions as compared to the binary CVO/Cu2O. The improved photocatalytic performance of CVO/Cu/Cu2O was mainly attributed to the enhanced visible-light absorption capability and the efficient Z-Scheme heterojunctions, which would boost the generation, migration, and separation of photogenerated charge carriers. This work may provide a strategy to design and fabricate copper vanadate-based Z-scheme heterojunction photocatalysts with high efficiency for CO2 reduction.

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Section: Resultsmentioning

confidence: 99%

Z-Scheme Cu₂O/Cu/Cu₃V₂O₇(OH)₂·2H₂O Heterostructures for Efficient Visible-Light Photocatalytic CO₂ Reduction

Song

Zhao

Feng

et al. 2022

ACS Appl. Energy Mater.

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“…through nanoscale crystalline silicon. The thickness of the layer for ps as a function of etching time can be observed figure (2); Includes signals for ethanol and hydrofluoric acid samples. From this figure make some information about the structure of ps.…”

Section: Resultsmentioning

confidence: 99%

“…It has a great commercial impact as it has the ability to create products, The materials and the range of functions to be reached. Silicon is an indirect band gap semiconductor that emits light in the infrared at very low efficiencies (1 photon is emitted for every 10 photo-generated electron-hole pairs) 2 IOP Publishing doi:10.1088/1755-1315/1120/1/012045 2 Porous silicon is a form of silicon that inserts porous nano silicon which holes into its microstructure, providing a large surface to volume ratio 3 Historically, it was discovered in the 1950s in Bell Lab 4 when trying to develop surface polishing. In the last 1980s, L.Canham 5 discovered luminescent properties using electro chemical etching with his lab.…”

Section: Introductionmentioning

confidence: 99%

The effective of time etching and different acids on the morphological porous silicon

Al-Jubouri

Salman²,

Al-Kadumi³

2022

IOP Conf. Ser.: Earth Environ. Sci.

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This paper study the characteristics of nano crystalline silicon prepared with the use of electrochemical etching with etching time (15,20) min for salt and Nitric acid (HNO3) and etching time (15,20) min for Ethanol and Hydrofluoric acid, and study the effect of this solutions on the characteristics of porous silicon (ps) will be produced by electrochemical etching by using electrochemical etching from p-type bulk silicon with resistivity (1-10 Ω.cm) with different time. after that, make a comparison for the morphological properties for porous silicon. Research employing X-ray diffraction and scanning electron microscopy instruments were also performed on the samples that were produced as a result. Micromachining etching uses electrochemical etching of silicon in HF solution. New wafer-etched structures are reported. Wall arrays, hole arrays, meander-shaped structures, spiral-like walls, microtubes, and more are produced. The electrochemical etch process and KOH etching time of the original pattern on final geometries are modelled.

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“…The CO * radicals can be characterized via DRIFT spectra and DFT calculations, which is the key intermediate for the conversion of CO 2 to CH 4 . Two types of MoS 2 (p-type and n-type) and two shapes of Cu 2 O (cubic and octahedron) were synthesized and combined with each other [ 113 ], and the compositions possessed different electronic and structural properties. The heterostructures formed by the p-type MoS 2 with intrinsic conductivity had a higher photocatalytic activity, and the methanol production yield was as high as 76 μmol g −1 h −1 .…”

Section: Photocatalysts With Different Basis Matricesmentioning

confidence: 99%

Recent Progress in Metal Oxide-Based Photocatalysts for CO2 Reduction to Solar Fuels: A Review

Xiong

Tang

et al. 2023

Molecules

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One of the challenges in developing practical CO2 photoconversion catalysts is the design of materials with a low cost, high activity and good stability. In this paper, excellent photocatalysts based on TiO2, WO3, ZnO, Cu2O and CeO2 metal oxide materials, which are cost-effective, long-lasting, and easy to fabricate, are evaluated. The characteristics of the nanohybrid catalysts depend greatly on their architecture and design. Thus, we focus on outstanding materials that offer effective and practical solutions. Strategies to improve CO2 conversion efficiency are summarized, including heterojunction, ion doping, defects, sensitization and morphology control, which can inspire the future improvement in photochemistry. The capacity of CO2 adsorption is also pivotal, which varies with the morphological and electronic structures. Forms of 0D, 1D, 2D and 3DOM (zero/one/two-dimensional- and three-dimensional-ordered macroporous, respectively) are involved. Particularly, the several advantages of the 3DOM material make it an excellent candidate material for CO2 conversion. Hence, we explain its preparation method. Based on the discussion, new insights and prospects for designing high-efficient metallic oxide photocatalysts to reduce CO2 emissions are presented.

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Effect of work-function and morphology of heterostructure components onCO2reduction photo-catalytic activity ofMoS

Cited by 51 publications

References 95 publications

Z-Scheme Cu₂O/Cu/Cu₃V₂O₇(OH)₂·2H₂O Heterostructures for Efficient Visible-Light Photocatalytic CO₂ Reduction

Z-Scheme Cu₂O/Cu/Cu₃V₂O₇(OH)₂·2H₂O Heterostructures for Efficient Visible-Light Photocatalytic CO₂ Reduction

The effective of time etching and different acids on the morphological porous silicon

Recent Progress in Metal Oxide-Based Photocatalysts for CO2 Reduction to Solar Fuels: A Review

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Effect of work-function and morphology of heterostructure components onCO2reduction photo-catalytic activity ofMoS

Cited by 51 publications

References 95 publications

Z-Scheme Cu2O/Cu/Cu3V2O7(OH)2·2H2O Heterostructures for Efficient Visible-Light Photocatalytic CO2 Reduction

Z-Scheme Cu2O/Cu/Cu3V2O7(OH)2·2H2O Heterostructures for Efficient Visible-Light Photocatalytic CO2 Reduction

The effective of time etching and different acids on the morphological porous silicon

Recent Progress in Metal Oxide-Based Photocatalysts for CO2 Reduction to Solar Fuels: A Review

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Product

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Z-Scheme Cu₂O/Cu/Cu₃V₂O₇(OH)₂·2H₂O Heterostructures for Efficient Visible-Light Photocatalytic CO₂ Reduction

Z-Scheme Cu₂O/Cu/Cu₃V₂O₇(OH)₂·2H₂O Heterostructures for Efficient Visible-Light Photocatalytic CO₂ Reduction