Construction of order mesoporous (Eu–La)/ZnO composite material and its luminescent characters

Na, Bao; Liu, Yu; Li, Zi Wei; Yu, Hui; Bai, Haotian; Xia, Long; Feng, Dawei; Dong, Xiangting; Wang, Tian-yang; Han, Jonghee; Wu, Rong-yi; Zhang, Qi

doi:10.1016/j.jlumin.2016.05.025

Cited by 19 publications

(7 citation statements)

References 61 publications

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“…During the last few years, researchers have developed many semiconductors based on oxides [20][21][22][23], hydroxides [24,25], tungstates [26][27][28], molybdates [29] and phosphates [30][31][32][33][34][35][36][37][38] for the decontamination of wastewater. A good photocatalyst should be simple to prepare, nontoxic, cheap and highly effective in utilizing light for the illumination of organic pollutants [39].…”

Section: Introductionmentioning

confidence: 99%

“…It has shown a good performance in photoelectrochemical applications such as water splitting and oxidation of organic pollutants. BiPO 4 has three main crystal structures: two monoclinic phases (M 1 , space group: P2 1 /n and M 2 , space group: P2 1 /m) and one hexagonal phase (H, space group: P3 1 21). Among them, HBIP, with a band gap of 4.6 eV, shows the lowest photocatalytic activity, while M 2 and M 1 , with band gaps of 4.2 eV and 3.8 eV, respectively, possess higher photocatalytic activity [40].…”

Section: Introductionmentioning

confidence: 99%

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Phase Transformation, Photocatalytic and Photoluminescent Properties of BiPO4 Catalysts Prepared by Solid-State Reaction: Degradation of Rhodamine B

et al. 2021

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Polycrystalline bismuth phosphate BiPO4 was synthesized by solid-state reaction at different temperatures varying from 500 to 900 °C. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDS) and Raman spectroscopy. The low-temperature phase of BiPO4 has monoclinic structure with a space group P21/n, and was transformed into the monoclinic phase P21/m with a slight distortion of monoclinic lattice when it was heated above 500 °C. The effect of the transformation on the structure, morphology and photocatalytic properties was examined. The photocatalytic activity of each sample, in presence of Rhodamine B (RhB) in aqueous solution, was carried out and analyzed under UV light irradiation. Photoexperiments showed that the material prepared at 500 °C is the best catalyst with degradation efficiency of the order of 96% after 12 min of reaction time under UV light irradiation. This high photocatalytic efficiency could be due to their structural and morphological changes. The photocatalytic degradation mechanism of RhB in the presence of the best photocatalyst BiP-500 °C is proposed. The stability of the catalyst was also examined by carrying out four successive tests of the degradation in the presence of BiP-500 °C. Total organic carbon (TOC) was used to further estimate the rate of mineralization in the presence of BiP-500 °C (83% TOC removal). Photoluminescence experiments performed under UV-laser light irradiation revealed emissions in the green-orange range, with optimal intensities for the mix systems observed at 550 °C.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase Transformation, Photocatalytic and Photoluminescent Properties of BiPO4 Catalysts Prepared by Solid-State Reaction: Degradation of Rhodamine B

et al. 2021

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“…Figure shows the Fourier transform infrared (FT-IR) spectra of the 18 EZ-160-5 sample. The absorption bands near 1619 cm –1 could be attributed to Zn–O bending vibration absorption peak . The bands could show the existence of ZnO frameworks in prepared materials.…”

Section: Resultsmentioning

confidence: 90%

“…Zinc oxide has direct wide band gap (3.37 eV) with a large exciton binding energy (60 meV), which often is used as a host matrix to synthesize composites. Zinc oxide can maintain its physical and chemical properties at high temperatures, and it can remain stable as a host matrix under various environments. − ZnO belongs to n-type semiconductors whose electrons on the valence band can accept energy transitions from ultraviolet light, which has a good absorption to ultraviolet light and can promote the fluorescent characteristics . Zinc oxide has different crystal structures, the hexagonal wurtzite structure is the commonest, and it is possible to synthesize ZnO particles with different morphologies by changing of synthesis methods, mineralizers, and so forth. , …”

Section: Introductionmentioning

confidence: 99%

Preparation of Bitter Melon-like Ordered Porous Fluorinated Eu³⁺–Phenanthroline/ZnO Composite with Yellow Light Emission

Dong

2019

Langmuir

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The soft template method was used to synthesize the ordered porous ZnO precursor and with 1,10-phenanthroline as an organic ligand, Eu 3+ as a luminescent center ion, and NH 4 F as a fluorine source, a kind of much uniform bitter melon-like ordered porous fluorinated Eu 3+ −phenanthroline/ZnO composite was finally prepared through the hydrothermal method. The average length of the bitter melon-like particles was 0.7−1.0 μm, and its average diameter was 300−400 nm, which had a lot of ordered mesoporous dispersed on the surfaces. The prepared materials showed strong yellow and blue light emission under 394 and 275 nm excitation, respectively. The optimum synthesized conditions were determined according to the synthesis parameter of the sample with the strongest emission peak intensity.

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“…Также недостаточно рассмотрена проблема взаимодействия центров рекомбинационной люминесценции КТ и ионов Eu 3+ , встроенных в КТ. Предполагается, например, перенос электронного возбуждения от центров рекомбинации кристаллов ZnO к ионам Eu 3+ [23].…”

Section: Introductionunclassified

Люминесцентные свойства гибридных наноструктур на основе квантовых точек CdS, 1,3-дикетоната европия и молекул метиленового голубого

Ovchinnikov¹,

Тайдаков²,

Ambrozevich³

et al. 2018

Журнал Технической Физики

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Construction of order mesoporous (Eu–La)/ZnO composite material and its luminescent characters

Cited by 19 publications

References 61 publications

Phase Transformation, Photocatalytic and Photoluminescent Properties of BiPO4 Catalysts Prepared by Solid-State Reaction: Degradation of Rhodamine B

Phase Transformation, Photocatalytic and Photoluminescent Properties of BiPO4 Catalysts Prepared by Solid-State Reaction: Degradation of Rhodamine B

Preparation of Bitter Melon-like Ordered Porous Fluorinated Eu³⁺–Phenanthroline/ZnO Composite with Yellow Light Emission

Люминесцентные свойства гибридных наноструктур на основе квантовых точек CdS, 1,3-дикетоната европия и молекул метиленового голубого

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Construction of order mesoporous (Eu–La)/ZnO composite material and its luminescent characters

Cited by 19 publications

References 61 publications

Phase Transformation, Photocatalytic and Photoluminescent Properties of BiPO4 Catalysts Prepared by Solid-State Reaction: Degradation of Rhodamine B

Phase Transformation, Photocatalytic and Photoluminescent Properties of BiPO4 Catalysts Prepared by Solid-State Reaction: Degradation of Rhodamine B

Preparation of Bitter Melon-like Ordered Porous Fluorinated Eu3+–Phenanthroline/ZnO Composite with Yellow Light Emission

Люминесцентные свойства гибридных наноструктур на основе квантовых точек CdS, 1,3-дикетоната европия и молекул метиленового голубого

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Preparation of Bitter Melon-like Ordered Porous Fluorinated Eu³⁺–Phenanthroline/ZnO Composite with Yellow Light Emission