Studies on the substrate-dependent photocatalytic properties of Cu<sub>2</sub>O heterojunctions

Khasanah, Riza Ariyani Nur; Lin, Hsiu-Hsia; Ho, Hsiang-Yun; Peng, Yen-Ping; Lim, Tsong–Shin; Hsiao, H.L.; Wang, Chang-Ren; Chuang, Min‐Chieh; Chien, Fan Ching

doi:10.1039/d0ra10681j

Cited by 8 publications

(3 citation statements)

References 40 publications

(62 reference statements)

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“…Because of its low toxicity, low price, narrow band gap, high abundance, visible light absorption, and suitable positions of CB and VB, Cu 2 O is considered as a promising visible-light-driven CO 2 reduction catalyst. Besides that, Cu 2 O also has a wide range of applications in photocatalytic hydrogen evolution, gas sensing, degradation of organic pollutants, and so on. − However, Cu 2 O has its own shortcomings. The high recombination rate of photogenerated electrons and holes contributes to its low CO 2 reduction efficiency .…”

Section: Photocatalytic Reduction Of Carbon Dioxide With Various Ligh...mentioning

confidence: 99%

Research Progress on CO₂ Photocatalytic Reduction with Full Solar Spectral Responses

et al. 2021

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Photoreduction of CO 2 can effectively alleviate the troublesome global energy crisis and environmental problems by converting CO 2 into hydrocarbons. Due to the discovery of photocatalysts that can respond to infrared light, the application of full spectrum in photocatalysis has attracted many researchers. This review comprehensively summarizes the progress in CO 2 photocatalytic reduction based on full-spectrum photocatalytic systems, and the basic theory of photoresponse, the mechanism of photocatalysis and photoreduction of CO 2 , and the representative photocatalytic materials working under ultraviolet, visible, and infrared irradiation are discussed. The strategies and related mechanisms of realizing full-spectrum photocatalysis are introduced, and the contribution of photoreactors to CO 2 photocatalytic reduction is also mentioned. Finally, the application prospects of light-driven reactions in CO 2 reduction are prospected. It is hoped that this review can offer clearer guidance for CO 2 reduction and construction of full spectrum-driven photocatalyst for efficient photocatalytic CO 2 reduction in the future.

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Section: Photocatalytic Reduction Of Carbon Dioxide With Various Ligh...mentioning

confidence: 99%

Research Progress on CO₂ Photocatalytic Reduction with Full Solar Spectral Responses

et al. 2021

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“…Photocatalysis is a field of research that is much in demand because of its application utilizing sunlight energy to produce hydrogen gas (H2) through photocatalytic water splitting [1] and to overcome water pollution through photocatalytic degradation of pollutants [2]. Cuprous oxide (Cu2O) is a promising material for photocatalysis that works under visible light irradiation because it has a narrow energy gap (2.0 − 2.6 eV) [3,4]. The valence band (VB) and conduction band (CB) edge positions of Cu2O coincide with the redox potentials of water.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Cu2O Thickness to Enhance Photocatalytic Properties of Electrodeposited Cu2O/FTO Photoanode

Khasanah,

Chien,

Prasetyowati

et al. 2024

Bull. Chem. React. Eng. Catal.

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Currently, n-type cuprous oxide (Cu2O) is a promising material as photocatalyst because of its energy gap of 2 eV that absorbs visible light up to a wavelength of 600 nm. As a photoelectrode, the thickness of Cu2O is crucial, where the improper thickness may worsen the photocatalytic properties. This work aimed to enhance the photocatalytic properties of Cu2O electrodeposited on fluorine-doped tin oxide (FTO), called Cu2O/FTO, by optimizing the Cu2O thickness. The thickness of Cu2O was controlled by adjusting the deposition time in the electrochemical deposition of Cu2O/FTO. By changing the deposition time from 5 to 45 min, the morphology of Cu2O changed from a leaf-like shape to an irregular facet shape with highly dense coverage, and the average thickness increased from 370 to 1100 nm. The increasing Cu2O thickness resulted in the increasing light absorption. The Cu2O/FTO demonstrated anodic photocurrent, which increased with the Cu2O thickness up to a threshold value of 1000 nm (35 min deposition time). At a thickness of 1000 nm, Cu2O/FTO achieved the highest photocurrent (150 and 58 µA under irradiation of 365 and 470 nm, respectively) due to the highly dense morphology and high absorption. In addition, with a thickness of 1000 nm, the charge diffusion was still good. Further, the increase of Cu2O film thickness higher than 1000 nm caused low photocatalytic properties even though the morphology was highly dense, and the absorption was the highest. This condition could be due to the relatively too-high resistance of Cu2O that caused poor charge diffusion. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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“…Cuprous oxide (Cu 2 O) is known as a p-type semiconductor with a narrow band gap energy ranging from 2.0 to 2.2 eV, which could effectively utilize a large proportion of visible light in sunlight. 17,18 Along with its low cost, it has been widely used as a catalytic material in photoelectrochemical and photocatalytic conversion processes. 19–21 Moreover, Cu 2 O possesses appropriate conduction and valence band levels that are beneficial for N 2 reduction and H 2 O oxidation.…”

Section: Introductionmentioning

confidence: 99%

Chloride-ion-directed synthesis of plate-like Cu₂O mesocrystals for effective nitrogen fixation

et al. 2022

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Studies on the substrate-dependent photocatalytic properties of Cu₂O heterojunctions

Abstract: Cu2O/TNA/Ti photoanode showed spectral response outperformed Cu2O/Ti and Cu2O/FTO photocathodes. Cu2O/TNA/Ti showed better spectral response than that of TNA/Ti, ascribed to UV-visible light absorption of Cu2O, not to charge separation enhancement.

Cited by 8 publications

References 40 publications

Research Progress on CO₂ Photocatalytic Reduction with Full Solar Spectral Responses

Research Progress on CO₂ Photocatalytic Reduction with Full Solar Spectral Responses

Optimization of Cu2O Thickness to Enhance Photocatalytic Properties of Electrodeposited Cu2O/FTO Photoanode

Chloride-ion-directed synthesis of plate-like Cu₂O mesocrystals for effective nitrogen fixation

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Studies on the substrate-dependent photocatalytic properties of Cu2O heterojunctions

Abstract: Cu2O/TNA/Ti photoanode showed spectral response outperformed Cu2O/Ti and Cu2O/FTO photocathodes. Cu2O/TNA/Ti showed better spectral response than that of TNA/Ti, ascribed to UV-visible light absorption of Cu2O, not to charge separation enhancement.

Cited by 8 publications

References 40 publications

Research Progress on CO2 Photocatalytic Reduction with Full Solar Spectral Responses

Research Progress on CO2 Photocatalytic Reduction with Full Solar Spectral Responses

Optimization of Cu2O Thickness to Enhance Photocatalytic Properties of Electrodeposited Cu2O/FTO Photoanode

Chloride-ion-directed synthesis of plate-like Cu2O mesocrystals for effective nitrogen fixation

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Resources

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Studies on the substrate-dependent photocatalytic properties of Cu₂O heterojunctions

Research Progress on CO₂ Photocatalytic Reduction with Full Solar Spectral Responses

Research Progress on CO₂ Photocatalytic Reduction with Full Solar Spectral Responses

Chloride-ion-directed synthesis of plate-like Cu₂O mesocrystals for effective nitrogen fixation