Efficient charge carrier separation and excellent visible light photoresponse in Cu2O nanowires

Zhou, Tingwei; Zang, Zhigang; Wei, Jing; Zheng, Junfeng; Hao, Jiongyue; Ling, Faling; Tang, Xiaosheng; Fang, Liang; Zhou, Miao

doi:10.1016/j.nanoen.2018.05.028

Cited by 174 publications

(24 citation statements)

References 45 publications

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“…Copper-based catalysts have attracted significant interest over the years, [1][2][3] especially in the field of electrocatalysis, thanks to their high electro-catalytic activities, low cost, abundance and good electrical conductivities. [4][5][6] For instance, copper-based nanomaterials have been considered as promising electrocatalysts for potential applications including reduction of CO 2 , [7] water splitting, [8] fuel cells [9,10] and oxidation of several organic compounds such as methanol, [11] glycerol, [12] aliphatic diols and carbohydrates.…”

Section: Introductionmentioning

confidence: 99%

Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu₂O Foams for Efficient Glycerol Electro‐Oxidation

et al. 2020

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Herein, Cu/Cu2O foams with dendritic‐like structures were electrodeposited atop a smooth Cu electrode by using a dynamic hydrogen bubbles technique, and they were used as efficient electrocatalysts for glycerol electrooxidation. The morphology, structure, and composition of the as‐prepared Cu/Cu2O foams were tuned by using additives (e. g. KCl and NiCl2) in the copper deposition bath to maximize their electrocatalytic performance towards glycerol electrooxidation. The as‐synthesized Cu/Cu2O foams showed superior electrocatalytic activity towards the glycerol oxidation reaction, as demonstrated by the significant negative shift in the onset potential (ca. 400 mV) together with an oxidation current that is up to six times higher, compared to the Cu/Cu2O non‐porous film with the same loading. The performance of these foams was further improved by introducing optimum amounts of either Ni2+ and/or Cl− ions. These additives resulted in a significant change in the structure and shape of the electrodeposited Cu/Cu2O textures with a concurrent increase in their roughness. Material and electrochemical characterization (e. g. SEM, XRD, XPS, LSV and CV) techniques were used to link the observed enhancements to the morphology, composition, and structure of the as‐synthesized Cu/Cu2O foam materials.

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Section: Introductionmentioning

confidence: 99%

Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu₂O Foams for Efficient Glycerol Electro‐Oxidation

et al. 2020

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“…Their XPS core-level spectra of Cu 2p comprise intense spin-orbit split peaks for 2p 3/2 (934.1 eV) and 2p 1/2 (954.2 eV) accompanied by satellite peaks (939-945 eV and 959-964 eV), which are typical of Cu II valency (Zatsepin et al, 1998;Momeni and Sedaghati, 2018). Besides, the remaining two main fitted peaks center at 932.4 and 952.5 eV, representing Cu 2p3/2 and Cu 2p1/2 of Cu I , respectively (Wang et al, 2018;Zhou et al, 2018). The O 1s peaks located at binding energies of 531.1 and 531.6 eV are in good agreement with the reported values of Cu 2 O and CuO, respectively (Han et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

High Specific Capacity Thermal Battery Cathodes LiCu2O2 and LiCu3O3 Prepared by a Simple Solid Phase Sintering

et al. 2020

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The thermal battery has been designed to be active at high temperature to satisfy storage life and large capacity for storage and emergency power. The development of thermal battery with high specific energy requires that the cathode has high thermal stability and excellent conductivity. Here, the semiconductor material Li-Cu-O compounds LiCu 2 O 2 and LiCu 3 O 3 are synthesized by a simple solid-phase sintering technique, which is simpler than the traditional synthesis process. The thermal decomposition temperatures are 680 • C and above 900 • C, respectively. This work first applies the Li-Cu-O compounds to the thermal battery. With a cutoff voltage of 1.5 V, the specific capacities of LiCu 2 O 2 and LiCu 3 O 3 are 423 and 332 mA h g −1. Both the decomposition temperature and specific capacity are higher than in the commercial FeS 2 and CoS 2 , especially LiCu 2 O 2. This work affords an alternative of the cathode materials for high specific capacity thermal battery.

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“…In this study, a GQD-based optical gas sensor was fabricated using a simple drop-casting deposition method. In addition, the simple hydrothermal method which has been used to synthesize Cu 2 O Nanowires [28] and 2D Nano-particles [29] was used to synthesize GQDs.…”

Section: Introductionmentioning

confidence: 99%

Optical graphene quantum dots gas sensors: experimental study

Raeyani

Shojaei

Ahmadi-Kandjani

2020

Mater. Res. Express

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We present a room temperature Graphene Quantum Dots (GQDs) based optical gas sensor for carbon dioxide gas detection. GQDs were prepared by a hydrothermal method and deposited on a quartz substrate using a drop-casting technique. The size of synthesized GQDs is in the range of 10 to 20 nm. GQDs films were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), photoluminescence (PL) and UV-Vis absorption spectroscopy. The gas sensing measurements were studied using optical absorbance changes of GQDs film upon exposure to different concentrations of CO 2 gas. The as-prepared gas sensor showed a significant sensitivity with a partially reversible response to CO 2 gas, indicating its great potential to pave a way toward a novel CO 2 gas sensor.

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Efficient charge carrier separation and excellent visible light photoresponse in Cu2O nanowires

Cited by 174 publications

References 45 publications

Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu₂O Foams for Efficient Glycerol Electro‐Oxidation

Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu₂O Foams for Efficient Glycerol Electro‐Oxidation

High Specific Capacity Thermal Battery Cathodes LiCu2O2 and LiCu3O3 Prepared by a Simple Solid Phase Sintering

Optical graphene quantum dots gas sensors: experimental study

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Efficient charge carrier separation and excellent visible light photoresponse in Cu2O nanowires

Cited by 174 publications

References 45 publications

Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu2O Foams for Efficient Glycerol Electro‐Oxidation

Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu2O Foams for Efficient Glycerol Electro‐Oxidation

High Specific Capacity Thermal Battery Cathodes LiCu2O2 and LiCu3O3 Prepared by a Simple Solid Phase Sintering

Optical graphene quantum dots gas sensors: experimental study

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Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu₂O Foams for Efficient Glycerol Electro‐Oxidation

Tailor‐Designed Porous Catalysts: Nickel‐Doped Cu/Cu₂O Foams for Efficient Glycerol Electro‐Oxidation