Enhanced photolysis stability of Cu<sub>2</sub>O grown on Cu nanowires with nanoscale twin boundaries

Huang, Chun‐Lung; Weng, Wei-Lun; Huang, Yan-Syun; Liao, Chu‐Bin

doi:10.1039/c9nr01406c

Cited by 27 publications

(18 citation statements)

References 27 publications

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“…Among various characterization techniques, the most direct way is electron microscopic technique, capturing the defects in the photocatalysts. [101][102][103][104][105][106] For instance, a great deal of pits were observed on ZnO nanorods by scanning electron microscope (SEM) and transmission electron microscopes (TEM). [101] TEM image of g-C 3 N 4 nanosheets presented the feature of www.advancedsciencenews.com www.solar-rrl.com macropores and substantial of mesopores in g-C 3 N 4 layer ( Figure 11a).…”

Section: Electron Microscopic Techniquesmentioning

confidence: 99%

“…[103] TEM and high-resolution TEM images of Cu/Cu 2 O interface indicated the feature of twin boundaries, promoting the stability of Cu 2 O. [104] The grain boundaries of ZnS(ethylenediamine) 0.5 nanosheets as organic-inorganic hybrid semiconductors with defect-rich structure were presented, corresponding a lot of dislocation and stacking fault at the boundaries in HRTEM (Figure 11b). [105] The obvious pores and sulfur vacancies were confirmed by false-color image and HRTEM image of sulfur vacancies confined in ZnIn 2 S 4 nanosheets (Figure 11c,d).…”

Section: Electron Microscopic Techniquesmentioning

confidence: 99%

“…As numerous achievements have been obtained upon the modulation of light absorption, charge separation, and PC reactions by defects engineering, it is necessary to evaluate the atomic structures of the defects and determine the relationship between the structure and catalytic activities by characterization techniques …”

Section: Characterization Techniques Of the Defectsmentioning

confidence: 99%

“…Among various characterization techniques, the most direct way is electron microscopic technique, capturing the defects in the photocatalysts . For instance, a great deal of pits were observed on ZnO nanorods by scanning electron microscope (SEM) and transmission electron microscopes (TEM) .…”

Section: Characterization Techniques Of the Defectsmentioning

confidence: 99%

“…To check the details, the edge dislocation can be obviously observed in high‐resolution TEM (HRTEM) image of TiO 2 nanowires, indicating the formation of a massive of dislocations . TEM and high‐resolution TEM images of Cu/Cu 2 O interface indicated the feature of twin boundaries, promoting the stability of Cu 2 O . The grain boundaries of ZnS(ethylenediamine) 0.5 nanosheets as organic–inorganic hybrid semiconductors with defect‐rich structure were presented, corresponding a lot of dislocation and stacking fault at the boundaries in HRTEM (Figure b) .…”

Section: Characterization Techniques Of the Defectsmentioning

confidence: 99%

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Defect Engineering of Photocatalysts for Solar Energy Conversion

et al. 2020

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Solar energy conversion is one of the most versatile approaches for sustainable energy demands. The fundamental limitations for photocatalysis remain light absorption, charge separation, and photocatalytic (PC) performance of the catalysts. For the past few decades, defect engineering has been proven to be a promising solution for converting solar energy to chemical energy. In this regard, the recent progress of defect engineering toward solar energy conversion is summarized. Beginning with defects classification, the definition of various defects, synthesized strategies, and characterization techniques of controllable material defects are presented. The role of defect engineering on solar energy conversion is developed, extending light absorption, promoting charge separation, and facilitating stable PC reaction. The achievement of the defective photocatalysts is discussed toward versatile applications such as solar water splitting, CO2 reduction, nitrogen fixation, molecular activation, pollutants degradation, and solar cells. Finally, this Review, with regards to defect engineering, ends with the future opportunities and challenges for this exciting and emerging area for solar energy conversion.

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Section: Electron Microscopic Techniquesmentioning

confidence: 99%

Section: Electron Microscopic Techniquesmentioning

confidence: 99%

Section: Characterization Techniques Of the Defectsmentioning

confidence: 99%

Section: Characterization Techniques Of the Defectsmentioning

confidence: 99%

Section: Characterization Techniques Of the Defectsmentioning

confidence: 99%

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Defect Engineering of Photocatalysts for Solar Energy Conversion

et al. 2020

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Biodegradable Copper‐Based Nanoparticles Augmented Chemodynamic Therapy through Deep Penetration and Suppressing Antioxidant Activity in Tumors

Zheng

Cheng²,

Fan

et al. 2021

Adv Healthcare Materials

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Chemodynamic therapy (CDT) efficacy has been limited by the poor penetration ability of large nanoparticles (NPs) and the antioxidant activity of tumors, especially high heme oxygenase (HO-1) and glutathione (GSH) levels. Herein, PEGylated CuMoO x -coated and zinc protoporphyrin IX (ZP)-loaded Cu (CCMZ) NPs are designed to afford rapid degradation ability and augmented CDT efficacy through inhibiting HO-1 activity and depleting GSH. The deep penetration of tumor can be achieved under the high levels of GSH, which triggers the degradation of CuMoO x shell. Meanwhile, GSH itself is depleted, which converts the reductive environment into constant oxidative environment, thus leading to the degradation of Cu core. Furthermore, the release of ZP from CCMZ NPs can inhibit HO-1 activity and provide a favorable microenvironment for CDT, and the release of Cu and Mo ions can convert hydrogen peroxide into hydroxyl radical to eliminate tumor cells more efficiently. In addition, CCMZ NPs also play an immune vaccine-like effect to recruit different immune cells for antitumor immunotherapy. In vitro and in vivo studies prove the augmented CDT property of CCMZ NPs, supplying a new strategy for improving CDT efficacy.

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Twinning Enhances Efficiencies of Metallic Catalysts toward Electrolytic Water Splitting

Huang

Sasaki

Raja

et al. 2021

Advanced Energy Materials

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Presently, the most popular and economical commercial process of H 2 production is steam-methane reforming, which uses fossil fuels as the raw material and produces comparable amounts of CO 2 as the by-product. [1] It is definitely an environmental unfriendly and a non-sustainable H 2 production process, and development of green H 2 production is in urgent need. In this regard, renewable energy driven electrolytic water splitting has been gaining increasing popularity and is considered the most promising green H 2 production process for future hydrogen economy infrastructure. For electrolytic water splitting, H 2 is generated at cathodes from water reduction, the hydrogen evolution reaction (HER), and O 2 is generated at anodes from water oxidation, the oxygen evolution reaction (OER). To drive HER and OER at room temperature, a minimum thermodynamic cell voltage of 1.23 V is required. In practice, a cell voltage significantly higher than 1.23 V is required to overcome extra resistances existing in the water splitting system. [2] The extra cell voltage needed is the overpotential (η), which is the main target for electrocatalyst development to reduce its value for more efficient and thus more economically competitive hydrogen production for large-scale applications.Over the years, transition metals, particularly Fe, Ni, and Co based electrocatalysts, including alloys, [3] oxides, [4] phosphides, [5] sulfides, [6] etc. have been widely studied and exhibited excellent electrocatalytic performances toward water splitting reactions. Some of the metallic electrocatalysts showed excellent electrocatalytic activities for both HER and OER, and can be applied as bifunctional electrocatalysts for water splitting. Bifunctional electrocatalysts offer the advantage of material application convenience and many of them are multi-metal based materials such as NiFe and NiFeM. [7][8][9] Huang et al. fabricated NiFe nanotubes via a novel bubble-releasing assisted pulse electrodeposition method. These NiFe nanotubes exhibited outstanding bifunctional features in alkaline media with η 10 , η at 10 mA cm −2 , of 236 and 100 mV for the OER and HER, respectively. [7] Qin et al. used a hydrogen reduction method to coat NiFeMo alloy onto Ni foams, which showed impressive η 10 of 238 and 45 mV for the OER and HER, respectively. [8] Khalid et al. fabricated non-noble tri-metallic nanoparticles embedded Twinning is demonstrated to be an effective way of enhancing efficiencies of metallic catalysts toward electrolytic water splitting. Dendritic Cu possessing dense coherent nanotwin (NT) boundaries (NTCu-5nm) is successfully prepared with an organic-assisted electrodeposition at high pulse current densities. NT boundaries significantly improve electrocatalytic efficiencies and stability of NTCu-5nm over nanocrystalline Cu (NCCu), reducing overpotentials at 10 mA cm −2 for the oxygen evolution reaction (OER) from 378 to 281 mV and from 235 to 88 mV for the hydrogen evolution reaction (HER), with a small chronoamperometric decay of 5% after 100 ...

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Enhanced photolysis stability of Cu₂O grown on Cu nanowires with nanoscale twin boundaries

Abstract: Superior photolysis stability of cuprous oxide grown on twinned Cu nanowires.

Cited by 27 publications

References 27 publications

Defect Engineering of Photocatalysts for Solar Energy Conversion

Defect Engineering of Photocatalysts for Solar Energy Conversion

Biodegradable Copper‐Based Nanoparticles Augmented Chemodynamic Therapy through Deep Penetration and Suppressing Antioxidant Activity in Tumors

Twinning Enhances Efficiencies of Metallic Catalysts toward Electrolytic Water Splitting

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Enhanced photolysis stability of Cu2O grown on Cu nanowires with nanoscale twin boundaries

Abstract: Superior photolysis stability of cuprous oxide grown on twinned Cu nanowires.

Cited by 27 publications

References 27 publications

Defect Engineering of Photocatalysts for Solar Energy Conversion

Defect Engineering of Photocatalysts for Solar Energy Conversion

Biodegradable Copper‐Based Nanoparticles Augmented Chemodynamic Therapy through Deep Penetration and Suppressing Antioxidant Activity in Tumors

Twinning Enhances Efficiencies of Metallic Catalysts toward Electrolytic Water Splitting

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Enhanced photolysis stability of Cu₂O grown on Cu nanowires with nanoscale twin boundaries