Electrodeposited Copper Oxide and Zinc Oxide Core-Shell Nanowire Photovoltaic Cells

DeMeo, Dante F.; MacNaughton, Samuel; Sonkusale, Sameer; Vandervelde, Thomas E.

doi:10.5772/17644

Cited by 14 publications

(12 citation statements)

References 35 publications

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“…5b), dramatically increasing the path length of the incident light, which is different from the large outward reflection as seen in a planar electrode. 112,113 The enhancement of light path length is dependent on the geometry of 1D nanostructures. 114 Leaky mode resonances could occur with either proper nanowire interspacing or diameter, which increases the light absorption.…”

Section: Dimensionality and Architecturementioning

confidence: 99%

Semiconductor-based photocatalysts and photoelectrochemical cells for solar fuel generation: a review

2015

Catal. Sci. Technol.

904

620

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Section: Dimensionality and Architecturementioning

confidence: 99%

Semiconductor-based photocatalysts and photoelectrochemical cells for solar fuel generation: a review

2015

Catal. Sci. Technol.

904

620

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“…This is particularly tunable for co-catalytic systems where one-dimensional and two-dimensional structured materials have a geometric dependency. Copper oxide and zinc oxide core-shell nano wires [100], Cu 2 O/CuO heterojunction decorated with nickel [101], three dimensional branched cobalt-doped α-Fe 2 O 3 nanorod/MgFe 2 O 4 heterojunction [102], CuO nanoplates coupled with anatase TiO 2 [103] are examples of geometrically active co-catalytic systems. For the synthesis of inorganic photocatalysts, pH along with hydrothermal temperature, treatment time, and solvent ratio control the morphology [104,105,106,107,108,109].…”

Section: Photocatalytic Conditionmentioning

confidence: 99%

Photocatalytic Water Splitting—The Untamed Dream: A Review of Recent Advances

et al. 2016

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Photocatalytic water splitting using sunlight is a promising technology capable of providing high energy yield without pollutant byproducts. Herein, we review various aspects of this technology including chemical reactions, physiochemical conditions and photocatalyst types such as metal oxides, sulfides, nitrides, nanocomposites, and doped materials followed by recent advances in computational modeling of photoactive materials. As the best-known catalyst for photocatalytic hydrogen and oxygen evolution, TiO 2 is discussed in a separate section, along with its challenges such as the wide band gap, large overpotential for hydrogen evolution, and rapid recombination of produced electron-hole pairs. Various approaches are addressed to overcome these shortcomings, such as doping with different elements, heterojunction catalysts, noble metal deposition, and surface modification. Development of a photocatalytic corrosion resistant, visible light absorbing, defect-tuned material with small particle size is the key to complete the sunlight to hydrogen cycle efficiently. Computational studies have opened new avenues to understand and predict the electronic density of states and band structure of advanced materials and could pave the way for the rational design of efficient photocatalysts for water splitting. Future directions are focused on developing innovative junction architectures, novel synthesis methods and optimizing the existing active materials to enhance charge transfer, visible light absorption, reducing the gas evolution overpotential and maintaining chemical and physical stability.

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“…Considering two photocatalysts with the same 0.1 wt% Cu nominal content, the hydrogen production rate obtained with the FSP-made one is almost double (6.9 vs. 3.8 mmol h −1 g cat −1 ), with a halved selectivity to CO (6.1% vs. 10.8%). This might be a consequence of the formation of small NPs of crystalline copper oxides during the FSP synthesis, acting as semiconductors and thus forming a heterojunction with TiO 2 , which improves the separation of the photoproduced charge couples [36]. In Cu/TiO 2 photocatalysts produced by the grafting technique the oxidized copper species on the TiO 2 surface are expected to be in amorphous form, as grafting is carried out at room temperature and, thus, their action mechanism, consisting of switching between the Cu 2+ and Cu + oxidation states, may be different [12].…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Flame-Made Cu/TiO2 and Cu-Pt/TiO2 Photocatalysts for Hydrogen Production

et al. 2017

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The effect of Cu or Cu-Pt nanoparticles in TiO 2 photocatalysts prepared by flame spray pyrolysis in one step was investigated in hydrogen production from methanol photo-steam reforming. Two series of titanium dioxide photocatalysts were prepared, containing either (i) Cu nanoparticles (0.05-0.5 wt%) or (ii) both Cu (0 to 0.5 wt%) and Pt (0.5 wt%) nanoparticles. In addition, three photocatalysts obtained either by grafting copper and/or by depositing platinum by wet methods on flame-made TiO 2 were also investigated. High hydrogen production rates were attained with copper-containing photocatalysts, though their photoactivity decreased with increasing Cu loading, whereas the photocatalysts containing both Cu and Pt nanoparticles exhibit a bell-shaped photoactivity trend with increasing copper content, the highest hydrogen production rate being attained with the photocatalyst containing 0.05 wt% Cu.

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Electrodeposited Copper Oxide and Zinc Oxide Core-Shell Nanowire Photovoltaic Cells

Cited by 14 publications

References 35 publications

Semiconductor-based photocatalysts and photoelectrochemical cells for solar fuel generation: a review

Semiconductor-based photocatalysts and photoelectrochemical cells for solar fuel generation: a review

Photocatalytic Water Splitting—The Untamed Dream: A Review of Recent Advances

Flame-Made Cu/TiO2 and Cu-Pt/TiO2 Photocatalysts for Hydrogen Production

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