Morphology-controlled electrodeposition of Cu2O microcrystalline particle films for application in photocatalysis under sunlight

Wu, Guozhong; Zhai, Wei; Sun, Fengqiang; Chen, Wei; Pan, Zizhao; Li, Weishan

doi:10.1016/j.materresbull.2012.08.067

Cited by 37 publications

(21 citation statements)

References 32 publications

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“…The concentration of the dye (MO) aqueous solution was measured by testing the absorbance properties at 464 nm in UV-vis spectra. The degradation rate of MO was defined as follows [24]:…”

Section: Methodsmentioning

confidence: 99%

Effects of architectures and H2O2 additions on the photocatalytic performance of hierarchical Cu2O nanostructures

Deng¹,

Zhang²,

Zhao³

et al. 2016

Nano Online

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Cu 2 O hierarchical nanostructures with different morphologies were successfully synthesized by a solvothermal method using copper (II) nitrate trihydrate (Cu(NO 3) 2 ⋅3H 2 O) and ethylene glycol (EG) as initial reagents. The obtained nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) specific surface area test, and UV-vis spectroscopy. The synthesis conditions (copper source, temperature, and reaction time) dominated the compositions and the formation of crystals with different morphologies. The visible light photocatalytic properties of as-prepared Cu 2 O nanostructures were investigated with and without hydrogen peroxide (H 2 O 2), and the effect of H 2 O 2 were evaluated by monitoring the degradation of methyl orange (MO) with various amounts of H 2 O 2. It was revealed that the degree of the photodegradation of MO depends on the amount of H 2 O 2 and the morphology of Cu 2 O.

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“…The concentration of the dye (MO) aqueous solution was measured by testing the absorbance properties at 464 nm in UV-vis spectra. The degradation rate of MO was defined as follows [24]:…”

Section: Methodsmentioning

confidence: 99%

Effects of architectures and H2O2 additions on the photocatalytic performance of hierarchical Cu2O nanostructures

Deng¹,

Zhang²,

Zhao³

et al. 2016

Nano Online

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“…If higher than 8.0 mM PVP was added, the adsorbed amount on the {111} facets reached saturation, and the {100} facets began to adsorb PVP molecules to further reduce the growth rate along the {100} direction. The octahedral shapes composed of all {111} crystal planes would disappear gradually [27].…”

Section: Structures Of Cu 2 O Semiconductorsmentioning

confidence: 99%

The effect of different exposed facets on the photoelectrocatalytic degradation of o-chlorophenol using p-type Cu 2 O crystals

Sang

Zhang

Lan

et al. 2017

Electrochimica Acta

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A B S T R A C TAlthough it is known that the efficacy of photoelectrocatalysts is enhanced by increasing the amount of high energy surface exposed, the development of a universal synthesis method with both superior activity and simplicity is needed for scalable applications. We herein controllably fabricated cuprous oxide (Cu 2 O) micro crystals with different morphologies, evolving from cubes, cuboctahedra, truncated octahedra and finally to octahedra on indium tin oxide (ITO) glass substrates, by a facile electrochemical deposition method. The structures of facet-engineered Cu 2 O samples and the underlying mechanism for the morphology evolution were investigated. The separation of photogenerated hole-electron pairs on Cu 2 O crystals with different exposed facets was characterized by measuring the photocurrent densities with chopped illumination, which increased with the increased concentrations of PVP: the octahedral Cu 2 O crystals, with the highest proportion of {111} facets exposed, exhibited the lowest electro-hole recombination in contrast to the cubes, cuboctahedra, and truncated octahedra, respectively. The photoelectrocatalytic degradation efficiency of the o-chlorophenol (2-CP) pollutant under sunlight irradiation with Cu 2 O-coated photocathode was further investigated to reveal the effect of different exposed facets. Due to the increased number of surface active sites available for degradation reactions, the octahedral Cu 2 O microcrystals presented higher photoelectrocatalytic activity compared to other shapes. Active oxygen species detected by electron spin-resonance (ESR) spectrometry implied that abundant superoxide radicals (O 2 *À ) were the dominant active radicals in the degradation.

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“…Firm adherence to solid substrates is a generally efficient way to meet the requirement of recyclable photocatalysts. [30] Then, in order to prevent the aggregation, we loaded copper nanoparticles on the surface of HGMs by electroless plating technique to improve the photocatalytic efficiency. [31] Nevertheless, the amount, evenness and morphology of loaded nanoparticles are difficult to control by this method.…”

Section: Introductionmentioning

confidence: 99%

Morphology‐controlled Electrodeposition of Copper Nanospheres onto FTO for Enhanced Photocatalytic Hydrogen Production

Feng

Wang

et al. 2017

Chin. J. Chem.

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Using CuSO 4 as the copper source, nanostructured copper with four different morphologies was obtained by electrodeposition method on FTO substrates. The as-synthesized Cu/FTO samples were characterized by X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), Raman, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM). The effects of electrodeposition potential and electrodeposition time on the Cu/FTO samples and the photocatalytic performance were investigated systematically. The results showed that the Cu/FTO samples were well-crystallized and the morphologies could be changed from nanoslices to nanodendrites structure with the negative shift of the depositing potential. The electrodeposition potential and time have a significant effect on the amount of H 2 evolution. The obtained Cu nanospheres which were prepared at the potential of -0.65 V for 600 s showed the best photocatalytic behavior. The mechanisms for the photocatalytic activities were also discussed.

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Morphology-controlled electrodeposition of Cu2O microcrystalline particle films for application in photocatalysis under sunlight

Cited by 37 publications

References 32 publications

Effects of architectures and H2O2 additions on the photocatalytic performance of hierarchical Cu2O nanostructures

Effects of architectures and H2O2 additions on the photocatalytic performance of hierarchical Cu2O nanostructures

The effect of different exposed facets on the photoelectrocatalytic degradation of o-chlorophenol using p-type Cu 2 O crystals

Morphology‐controlled Electrodeposition of Copper Nanospheres onto FTO for Enhanced Photocatalytic Hydrogen Production

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