Photo-assisted synthesis of rosalike CuSe hierarchical nanostructures on TiO2 nanotubes with remarkable photocatalytic performance

Li, Yue; Luo, Shenglian; Yang, Lixia; Liu, Chengbin; Chen, Yao; Meng, Deshui

doi:10.1016/j.electacta.2012.08.013

Cited by 19 publications

(6 citation statements)

References 32 publications

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“…It has a direct band gap of 2.2 eV and an indirect band gap of 1.4 eV. 8 They can also be synthesized in different as well as in a variety of morphologies and shapes such as spherical nanoparticles, 9 nanocubes, 10 nanorods, 11 nanowires, 12 hierarchical nanostructures, 13 nanosheets, and nanoplates. 14 Copper selenides are p-type semiconductors, as copper vacancies exist within the crystal lattice.…”

Section: ■ Introductionmentioning

confidence: 99%

X-ray Diffraction Analysis of Hexagonal Klockmannite CuSe Nanoparticles for Photodetectors under UV Light

2021

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The CuSe nanoparticles are synthesized from direct vapor transport-grown CuSe compound using the sonochemical exfoliation technique. The chemical composition, crystalline phase, morphological analysis, optical properties, vibrational modes, and oxidation states of the elements of the synthesized nanoparticles are verified by energy-dispersive analysis of X-rays (EDAX), elemental mapping, X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), ultraviolet diffused reflectance spectroscopy (UV-DRS) - photoluminescence measurements (PL), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). Here, the particle sizes and the intrinsic strain of the XRD peak broadening analysis were investigated using the Williamson–Hall method (W–H), size–strain plot, and Halder–Wagner process (H–W). In addition, for the determination of physical and microstructural parameters such as strain, stress, and energy density, various models, that is, uniform deformation model, uniform stress deformation model, uniform deformation energy density model, have been well-thought-out in the W–H method. The average particle size calculated by the methods of W–H, size–strain, and H–W is compared to that calculated using HR-TEM and particle size analysis. Photodetectors based on CuSe nanoparticles are fabricated and studied under UV light with an on/off period of 10 s. The device showed excellent photoconductivity, photocurrent, responsivity, specific detectivity, external quantum efficiency, and good response time. The results demonstrated that CuSe nanoparticles possess excellent optoelectronic properties and have potential applications under UV light conditions.

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Section: ■ Introductionmentioning

confidence: 99%

X-ray Diffraction Analysis of Hexagonal Klockmannite CuSe Nanoparticles for Photodetectors under UV Light

2021

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“…CP has a high and easily accessible exposed surface, which can shorten the oxygen diffusion path and promote rapid reaction kinetics. In addition, CP has a porous structure that can provide enough sites for oxidation and reduction reactions, as well as high conductivity and isotropic conductivity [19,20]. It is challenging to deposit valuable metals on the surface of CP due to its high degree of graphitization, reduced defect count, and increased hydrophobicity.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Oxygen Reduction Catalyst Electrodes by Electrochemical Acidification and Synergistic Electrodeposition

Zhou,

Guo,

et al. 2024

Catalysts

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A proton exchange membrane fuel cell (PEMFC) is an efficient and environmentally friendly power production technology that uses hydrogen energy. The cathodic oxygen reduction electrode is a critical component in the development of PEMFC. Most techniques deposit catalyst nanoparticles in areas that are inaccessible for catalytic processes, reducing platinum utilization. The substrate used in this study was carbon paper (CP) with a self-supporting structure. First, electrochemical acidification technology was employed to modify the CP’s surface, followed by nanoparticle manufacturing and fixation on the CP in a single step by electrodeposition. The Pt/C0.5V2.24CP catalyst electrode demonstrated high-quality activity in the oxygen reduction reaction (ORR), with a homogeneous particle dispersion and particle size of around 50 nm. The mass activity and electrochemical active surface area (ECSA) of the Pt/C0.5V2.24CP catalyst electrode were 1.74 and 3.98 times higher than those of the Pt/C/CP-1 electrodes made with commercial catalysts, respectively. After 5000 cycles of accelerated durability testing (ADT), the mass activity and ECSA were 1.28 times and 6.16 times more than Pt/C/CP-1. This paper successfully proved the viability of electrodepositing Pt nanoparticles on CP following acidification, and that the electrochemical acidification methods have a positive influence on improving electrode ORR activity.

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“…[10] Chemical photosynthesis and fuel production are other important applications of heterogeneous photocatalytic systems. [11][12][13][14][15] Various semiconductor materials such as TiO 2 , ZnO, and CdS have been previously used for their catalytic degradation ability. However, these materials have high band gap energy.…”

Section: Introductionmentioning

confidence: 99%

Novel PbSe/Graphene Nanocomposites Synthesized With Ultrasonic Assisted Method and their Enhanced Photocatalytic Activity

Ullah

Nikam

Cho

et al. 2014

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-

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The authors report novel material PbSe/graphene nanocomposite synthesis via facile ultrasonic assisted method. The structural and physicochemical properties of PbSe/graphene composite are further characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) with an energy-dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), and Raman spectroscopy analysis. The photocatalytic activities were investigated by the degradation of methylene blue and rhodamine B as a standard dye. This study suggests that the as-prepared PbSe/graphene nanocomposite can be utilized as an efficient photocatalyst material.

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Photo-assisted synthesis of rosalike CuSe hierarchical nanostructures on TiO2 nanotubes with remarkable photocatalytic performance

Cited by 19 publications

References 32 publications

X-ray Diffraction Analysis of Hexagonal Klockmannite CuSe Nanoparticles for Photodetectors under UV Light

X-ray Diffraction Analysis of Hexagonal Klockmannite CuSe Nanoparticles for Photodetectors under UV Light

Preparation of Oxygen Reduction Catalyst Electrodes by Electrochemical Acidification and Synergistic Electrodeposition

Novel PbSe/Graphene Nanocomposites Synthesized With Ultrasonic Assisted Method and their Enhanced Photocatalytic Activity

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