Short belt-like Ca2B2O5·H2O nanostructures: Hydrothermal formation, FT-IR, thermal decomposition, and optical properties

Zhu, Wancheng; Zhang, Xiao; Wang, Xiaoli; Zhang, Heng; Zhang, Qiang; Liu, Xiang

doi:10.1016/j.jcrysgro.2011.07.019

Cited by 18 publications

(8 citation statements)

References 37 publications

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“…The FT-IR spectra of pristine ZnO NPs and Ag 2 O–ZnO nanocomposites are displayed in Figure A. The broad peak at 3220–3550 cm –1 and the peak assigned at 1634.90 cm –1 are ascribed to the O–H stretching vibration and bending modes of the adsorbed H 2 O and in the hydrated oxide surface. , The peak was located at 776 cm –1 corresponding to the Zn–O vibration. After Ag 2 O NP impregnation, the characteristic peak of ZnO was shifted to a lower wavenumber at 734.9 cm –1 with the boost of Ag 2 O NPs, which underlines the coexistence of Ag 2 O and ZnO NPs and demonstrates the fabrication of Ag 2 O–ZnO nanocomposites.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Mesoporous Ag₂O–ZnO Heterojunctions for Efficient Promotion of Visible Light Photodegradation of Tetracycline

et al. 2020

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Fabrication of 3D mesoporous Ag 2 O−ZnO heterojunctions at varying Ag 2 O contents has been achieved through poly(ethylene glycol)-block-poly(propylene glycol)-block-poly-(ethylene glycol) (Pluronic F-108) as the structure-directing agent for the first time. The mesoporous Ag 2 O−ZnO nanocomposites exhibited a mesoporous structure, which revealed a large pore volume and high surface area. The photocatalytic efficiency over mesoporous Ag 2 O−ZnO nanocomposites for tetracycline (TC) compared with that over commercial P-25 and pristine ZnO NPs through the visible light exposure was studied. Mesoporous 1.5% Ag 2 O−ZnO nanocomposites indicated the highest degradation efficiency of 100% of TC during 120 min of the visible light exposure compared with 5% and 10% for pristine ZnO NPs and commercial P-25, respectively. The TC degradation rate took place much rapidly over 1.5% Ag 2 O−ZnO nanocomposites (0.798 μmol L −1 min −1 ) as compared to either commercial P-25 (0.097 μmol L −1 min −1 ) or ZnO NPs (0.035 μmol L −1 min −1 ). The mesoporous 1.5% Ag 2 O−ZnO nanocomposite revealed the highest degradation rate among all synthesized samples, and it was 23 and 8 orders of magnitudes greater than those of pristine ZnO NPs and P-25, respectively. The photoluminescence and transient photocurrent intensity behaviors have been discussed to explore photocatalysis mechanisms. It is anticipated that the present work will contribute some suggestions for understanding other heterojunctions with outstanding behaviors.

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Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Mesoporous Ag₂O–ZnO Heterojunctions for Efficient Promotion of Visible Light Photodegradation of Tetracycline

et al. 2020

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“…The FT-IR spectra of the PtO–ZnO nanocomposites at different PtO percentages are depicted in Figure B. The broad peaks for the pristine ZnO and PtO–ZnO nanocomposites were located at 3220–3550 cm –1 , matching the O–H stretching vibration, and the peak located at 1634.90 cm –1 is attributed to the bending modes of the hydrated oxide surface and adsorbed H 2 O. , The Zn–O vibration peak was observed at 784 cm –1 . After incorporating PtO onto mesoporous ZnO, the characteristic Zn–O vibration peak was gradually shifted to ∼743 cm –1 with the increment of PtO NPs from 0.2 to 0.8%, which confirms the coexistence of ZnO and PtO NPs and confirms the construction of PtO–ZnO nanocomposites.…”

Section: Resultsmentioning

confidence: 99%

“…The broad peaks for the pristine ZnO and PtO−ZnO nanocomposites were located at 3220−3550 cm −1 , matching the O−H stretching vibration, and the peak located at 1634.90 cm −1 is attributed to the bending modes of the hydrated oxide surface and adsorbed H 2 O. 42,43 The Zn−O vibration peak was observed at 784 cm −1 . After incorporating PtO onto mesoporous ZnO, the characteristic Zn−O vibration peak 44 TEM images for the pristine ZnO NPs and mesoporous 0.6 and 0.8% PtO−ZnO nanocomposites were examined as displayed in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Mesoporous PtO–ZnO Nanocomposites with Promoted Photocatalytic Performance for Degradation of Tetracycline

et al. 2021

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Herein, we report a simple incorporation of PtO NPs at diverse percentages (0.2−0.8 wt %) onto a highly crystalline and mesoporous ZnO matrix by the wet-impregnation approach for degradation of tetracycline (TC) upon visible light exposure. These well-dispersed and small-sized PtO NPs provide the mesoporous PtO−ZnO nanocomposites with outstanding photocatalytic performance for complete TC degradation. The optimized 0.6% PtO−ZnO photocatalyst exhibits excellent TC degradation, and its degradation efficiency reached ∼99% within 120 min. The photocatalytic performance of the 0.6% PtO−ZnO nanocomposite is 20 and 10 times higher than that of pristine ZnO and commercial P-25, respectively. The photodegradation rate of TC over the 0.6% PtO−ZnO nanocomposite is 34 and 12.5 times greater than that of pristine ZnO and commercial P-25, respectively. This is because of the large surface area, unique porous structure, synergistic effect, and broad visible light absorption of the PtO−ZnO nanocomposite. Moreover, mesoporous PtO−ZnO nanocomposites showed a high stability and recyclability over five iterations. This work demonstrates the remarkable role of combining PtO and ZnO photocatalysts in providing nanocomposites with significant potential for the preservation of human health through wastewater remediation.

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“…Based on the above experimental results and the reported literature, it was found that Ca 3 (BO 3 ) 2 is more stable than Ca 2 B 2 O 5 , the possible formation reactions of Ca 2 B 2 O 5 ·H 2 O:Eu 3+ and Ca 3 (BO 3 ) 2 :Eu 3+ involved in hydrothermal treatment and thermal conversion can be written as follows:…”

Section: Resultsmentioning

confidence: 99%

Synthesis and luminescence properties of Ca₃(BO₃)₂:Eu³⁺ via two‐step method

et al. 2018

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Novel Ca B O ·H O:Eu nanotubes, constructed with nanobelts, were prepared using a hydrothermal method. The Ca (BO ) :Eu nanobelts with a thickness of about 100 nm were made for the first time using a two-step hydrothermal process with Ca B O ·H O:Eu as the precursor. The samples were characterized by energy dispersive X-ray spectroscopy, X-ray diffraction, Fourier transform infra-red spectroscopy, thermogravimetry differential thermal analysis and scanning electron microscopy. The relationship between Ca (BO ) :Eu and Ca B O ·H O:Eu was also studied. Possible reaction and growth mechanisms for Ca B O ·H O:Eu and Ca (BO ) :Eu were proposed. Ca (BO ) :Eu preserved the basic microstructure unit of Ca B O ·H O:Eu . Both Ca B O ·H O:Eu and Ca (BO ) :Eu exhibited red emissions centred at 614 nm, but the maximum excitation peaks for Ca B O ·H O:Eu and Ca (BO ) :Eu differed. Ca (BO ) :Eu exhibited higher photoluminescence intensity but a lower R/O value than Ca B O ·H O:Eu .

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Short belt-like Ca2B2O5·H2O nanostructures: Hydrothermal formation, FT-IR, thermal decomposition, and optical properties

Cited by 18 publications

References 37 publications

Facile Synthesis of Mesoporous Ag₂O–ZnO Heterojunctions for Efficient Promotion of Visible Light Photodegradation of Tetracycline

Facile Synthesis of Mesoporous Ag₂O–ZnO Heterojunctions for Efficient Promotion of Visible Light Photodegradation of Tetracycline

Fabrication of Mesoporous PtO–ZnO Nanocomposites with Promoted Photocatalytic Performance for Degradation of Tetracycline

Synthesis and luminescence properties of Ca₃(BO₃)₂:Eu³⁺ via two‐step method

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Short belt-like Ca2B2O5·H2O nanostructures: Hydrothermal formation, FT-IR, thermal decomposition, and optical properties

Cited by 18 publications

References 37 publications

Facile Synthesis of Mesoporous Ag2O–ZnO Heterojunctions for Efficient Promotion of Visible Light Photodegradation of Tetracycline

Facile Synthesis of Mesoporous Ag2O–ZnO Heterojunctions for Efficient Promotion of Visible Light Photodegradation of Tetracycline

Fabrication of Mesoporous PtO–ZnO Nanocomposites with Promoted Photocatalytic Performance for Degradation of Tetracycline

Synthesis and luminescence properties of Ca3(BO3)2:Eu3+ via two‐step method

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Facile Synthesis of Mesoporous Ag₂O–ZnO Heterojunctions for Efficient Promotion of Visible Light Photodegradation of Tetracycline

Facile Synthesis of Mesoporous Ag₂O–ZnO Heterojunctions for Efficient Promotion of Visible Light Photodegradation of Tetracycline

Synthesis and luminescence properties of Ca₃(BO₃)₂:Eu³⁺ via two‐step method