Regulable preparation of the oxygen vacancy of ZnO QDs and their fluorescence performance

Huang, Wenyi; Lv, Xiaowei; Tan, Jialin; Huang, Qiumei; Cheng, Hao; Feng, Jun; Li, Lijun

doi:10.1016/j.molstruc.2019.05.105

Cited by 28 publications

(10 citation statements)

References 28 publications

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“…However, there is no report on the effect of alkali base types on the dispersibility of water-soluble ZnO QDs as far as we know. Moreover, the results over the ratio of hydroxide to zinc ions on the fluorescence properties of QDs are controversial [21,24]. In this study, ZnO QDs were prepared by the sol-gel method, and their surface was modified by APTES to make them water soluble.…”

Section: Introductionmentioning

confidence: 99%

Effect of alkali bases on the synthesis of ZnO quantum dots

Zhang

Luo

et al. 2021

Open Chemistry

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The surface-modified zinc oxide quantum dots (ZnO QDs) have broad application prospects in the field of biomedicine because of their good water solubility, dispersibility, and high fluorescence stability. The alkali bases play important roles in controlling the morphology, size distribution, dispersity, and fluorescence intensity of the synthesized ZnO QDs. In this article, ZnO QDs were synthesized to induce hydrolysis–condensation reaction. The influences of alkali bases (LiOH, NaOH, and KOH) and the ratio of n(Zn2+):n(OH−) on the properties of synthesized ZnO QDs were investigated. The results show that the particle size of the ZnO QDs prepared using LiOH and NaOH as raw materials are smaller than that using KOH. ZnO QDs prepared at the ratio of n(Zn2+):n(LiOH) = 1:1 have the best fluorescence performance and dispersibility.

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Section: Introductionmentioning

confidence: 99%

Effect of alkali bases on the synthesis of ZnO quantum dots

Zhang

Luo

et al. 2021

Open Chemistry

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“…However, excessive concentration of doping elements reduces the fluorescence emission intensity and the quantum yield. 36 QDs also show the quenching of fluorescence intensity with the addition of the metal ion. 37 The quenching of the fluorescence intensity can also be possible by the passivation of surface defects by the organic ligands.…”

Section: Introductionmentioning

confidence: 99%

Journey of ZnO quantum dots from undoped to rare-earth and transition metal-doped and their applications

Singh

2021

RSC Adv.

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“…3d. Four XPS peaks at 835.1, 838.7, 851.9 and 855.5 eV were well fitted for La(OH) 3 [41,42]. Two peaks located at 838.7 and at 855.5 eV are ascribed to La3d 5/2 and La3d 3/2 , respectively.…”

Section: Compositional Analysismentioning

confidence: 81%

A new core–shell Z-scheme heterojunction structured La(OH)3@In2S3 composite with superior photocatalytic performance

Chen

et al. 2021

Appl. Phys. A

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Constructing Z-scheme heterojunction photocatalyst with strong redox ability to make for enhanced photocatalytic performance and efficient charge separation is extremely attractive but still underdeveloped. Herein, a Z-scheme heterojunction structured La(OH)3@In2S3 composite (labeled by “LIS”) with photocatalytic for the methylene orange (MO) degradation under simulated light irradiation has been developed. The as-prepared LIS, together with commercial La(OH)3 and pure In2S3 fabricated with the identical processing method and starting materials as those of LIS, was characterized by X-ray diffraction, UV–vis diffuse reflectance spectra, scanning electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, photoluminescence spectra and electrochemical impedance spectroscopy. The results show the heterojunction of La(OH)3/In2S3 has prolonged the lifetime of the photo-generated carriers. The photocatalytic activity test shows that over only a small amount (0.02 g in 100 ml MO) of LIS, the photodegradation rate of 95% toward MO can be obtained in 90 min, which is about 3.4 times higher than that over pure In2S3. The active species trapping experiments indicate that there were four active species playing roles in photodegradation as the following order: e– = ∙OH < h+ < ∙O2–. A mechanism of Z-scheme heterojunction was proposed and well explained the enhanced photocatalytic performance. This work provides a new cost-effective photocatalyst with high photocatalytic properties.

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Regulable preparation of the oxygen vacancy of ZnO QDs and their fluorescence performance

Cited by 28 publications

References 28 publications

Effect of alkali bases on the synthesis of ZnO quantum dots

Effect of alkali bases on the synthesis of ZnO quantum dots

Journey of ZnO quantum dots from undoped to rare-earth and transition metal-doped and their applications

A new core–shell Z-scheme heterojunction structured La(OH)3@In2S3 composite with superior photocatalytic performance

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