UV luminescence enhancement of Cu-doped ZnO nanorods grown by hydrothermal treatment

Zhang, Yu; Yang, Zhuo; Tang, Lei; Shen, Yifan; Wu, Yinuo; Zhang, Nan; Huang, Feiyu; Liu, Hongfei; Zhou, Yubing; Meng, Xiuxia; Chu, Yanqiu

doi:10.1016/j.jlumin.2022.119364

Cited by 5 publications

(3 citation statements)

References 45 publications

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“…The UV–vis diffuse reflectance spectra of H–Nb 2 O 5 and H–Cu 0.1 –Nb 2 O 5 , H–Cu 0.05 –Nb 2 O 5 , and H–Cu 0.2 –Nb 2 O 5 are shown in Figure S10. The absorption band at 200–400 nm can be assigned to the intrinsic band gap absorption of the samples. − With the amount of Cu doping increasing, the two absorption bands at 400–700 nm appear in the Cu-doped samples. And the intensity of the absorption bands increases with increasing Cu content.…”

Section: Resultsmentioning

confidence: 99%

Enhancing the Lithium Storage Performance of the Nb₂O₅ Anode via Synergistic Engineering of Phase and Cu Doping

Dong,

Yao,

et al. 2024

ACS Appl. Mater. Interfaces

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Nb 2 O 5 has been viewed as a promising anode material for lithium-ion batteries by virtue of its appropriate redox potential and high theoretical capacity. However, it suffers from poor electric conductivity and low ion diffusivity. Herein, we demonstrate the controllable fabrication of Cu-doped Nb 2 O 5 with orthorhombic (T− Nb 2 O 5 ) and monoclinic (H−Nb 2 O 5 ) phases through annealing the solvothermally presynthesized Nb 2 O 5 precursor under different temperatures in air, and the Cu doping amount can be readily controlled by the concentration of the precursor solution, whose effect on the lithium storage behaviors of the Cu-doped Nb 2 O 5 is thoroughly investigated. H−Nb 2 O 5 shows obvious redox peaks (Nb 5+ /Nb 4+ and Nb 4+ /Nb 3+ ) with much higher capacity and better cycling stability than those for the widely investigated T−Nb 2 O 5 . When introducing appropriate Cu doping, the optimized H−Cu 0.1 −Nb 2 O 5 electrode shows greatly enhanced conductivity and lower diffusion barrier as revealed by the theoretical calculations and electrochemical characterizations, delivering a high reversible capacity of 203.6 mAh g −1 and a high capacity retention of 140.8 mAh g −1 after 5000 cycles at 1 A g −1 , with a high initial Coulombic efficiency of 91% and a high rate capacity of 144.2 mAh g −1 at 4 A g −1 . As a demonstration for full-cell application, the H−Cu 0.1 −Nb 2 O 5 ||LiFePO 4 cell displays good cycling performance, exhibiting a reversible capacity of 135 mAh g −1 after 200 cycles at 0.2 A g −1 . More importantly, this work offers a new synthesis protocol of the monoclinic Nb 2 O 5 phase with high capacity retention and improved reaction kinetics.

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Section: Resultsmentioning

confidence: 99%

Enhancing the Lithium Storage Performance of the Nb₂O₅ Anode via Synergistic Engineering of Phase and Cu Doping

Dong,

Yao,

et al. 2024

ACS Appl. Mater. Interfaces

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“…To the best of our knowledge, various metal ions such as Al, Mg, Co, Cu, etc have been used as dopants to change the electronic structure and other physical properties of ZnO nanorods 4,10 . Among these metal ions, the Cu dopant in the ZnO lattice is used magnetic atoms.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, the presence of Cu in ZnO structure causes the substitution of Zn by Cu ions due to the size similarity of Cu (0.096 nm) and Zn (0.075 nm) 4 . Zhang et al 10 observed that Cu incorporation in ZnO structure causes bound exciton which is responsible for the enhancement of UV emission 10 . Another study reported that Cu partially replaced Zn ions.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Al-Cu Co-Dopants on Morphology, Structure, and Optical Properties of ZnO Nanostructures

et al. 2023

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We have synthesized ZnO nanostructure by using two-step methods i.e ultrasonic nebulizer and chemical bath deposition (CBD) at 95 o C for two hours. The morphology, structural, reflectance, and photoluminescence properties have been characterized by the scanning electron microscope (SEM), the X-ray diffraction (XRD) measurement, ultraviolet-visible (UV-Vis) spectrophotometer, and photoluminescence spectrometer, respectively. Structurally, all samples possess polycrystalline hexagonal wurtzite structure, and the addition of Al-Cu decreases the crystallinity of ZnO nanostructures. Meanwhile, morphologically, the role of Cu dopants in Al-Cu co-doped ZnO nanostructures suppressed the growth of nanostructures in the c-axis. Hence, it can be used to modify the morphology of ZnO nanorods to nanodisks/nanosheets. Optically, the Al-Cu co-dopants can be used to shift the optical band gap energy of ZnO nanostructures to a lower wavelength (blueshift). The photoluminescence (PL) properties confirmed that the Al-Cu co-dopants have two peaks at the photon energy of 3.78 eV and 3.90 eV.

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Contribution of Li substitution for Zn to green light emission of ZnO ceramic thin films

Meng,

Zhang,

et al. 2024

Ceramics International

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UV luminescence enhancement of Cu-doped ZnO nanorods grown by hydrothermal treatment

Cited by 5 publications

References 45 publications

Enhancing the Lithium Storage Performance of the Nb₂O₅ Anode via Synergistic Engineering of Phase and Cu Doping

Enhancing the Lithium Storage Performance of the Nb₂O₅ Anode via Synergistic Engineering of Phase and Cu Doping

The Effect of Al-Cu Co-Dopants on Morphology, Structure, and Optical Properties of ZnO Nanostructures

Contribution of Li substitution for Zn to green light emission of ZnO ceramic thin films

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UV luminescence enhancement of Cu-doped ZnO nanorods grown by hydrothermal treatment

Cited by 5 publications

References 45 publications

Enhancing the Lithium Storage Performance of the Nb2O5 Anode via Synergistic Engineering of Phase and Cu Doping

Enhancing the Lithium Storage Performance of the Nb2O5 Anode via Synergistic Engineering of Phase and Cu Doping

The Effect of Al-Cu Co-Dopants on Morphology, Structure, and Optical Properties of ZnO Nanostructures

Contribution of Li substitution for Zn to green light emission of ZnO ceramic thin films

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Product

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Enhancing the Lithium Storage Performance of the Nb₂O₅ Anode via Synergistic Engineering of Phase and Cu Doping

Enhancing the Lithium Storage Performance of the Nb₂O₅ Anode via Synergistic Engineering of Phase and Cu Doping