Synthesis, surface and optical properties of Ag2CaV4O12 nanoparticles for dye removal under visible irradiation

Lu, Yuting; Wan, Yingpeng; Bi, Shala; Weng, Honggen; Huang, Yanlin; Qin, Lin; Seo, Hyo Jin

doi:10.1016/j.matchemphys.2016.06.006

Cited by 8 publications

(4 citation statements)

References 38 publications

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“…Interestingly, only one compound Ag 2 CaV 4 O 12 exists in the Ag 2 O–CaO–V 2 O 5 system according to the phase diagram. Researchers mainly focused on the optical and photocatalytic properties of Ag 2 CaV 4 O 12 , while the dielectric properties have not been studied before to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Ultralow-Temperature Synthesis and Densification of Ag₂CaV₄O₁₂ with Improved Microwave Dielectric Performances

Yin

Khaliq

et al. 2021

ACS Sustainable Chem. Eng.

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At extremely low temperatures, Ag 2 CaV 4 O 12 was easily synthesized using the traditional solid-state approach. With a low relative permittivity (ε r ) of 7.52, a high quality factor (Q × f) of 48 800 GHz (f = 13.6 GHz), and a temperature coefficient of resonance frequency (τ f ) of −77.4 ppm/°C, dense ceramics sintered at 480 °C with outstanding microwave dielectric characteristics were attained. By combining with rutile TiO 2 , a composite ceramic with balanced microwave dielectric properties (τ f = 3.2 ppm/°C, ε r = 10.96, and Q × f = 49 081 GHz) was achieved. No chemical reaction between Ag 2 CaV 4 O 12 and silver and aluminum occurred. All of the findings show that Ag 2 CaV 4 O 12 has the potential to be used as dielectric resonances in wireless communication and as substrates in low-temperature cofired ceramics. Furthermore, the processing at an ultralow temperature of Ag 2 CaV 4 O 12 shows that it is extraordinarily energy saving from the point of view of fabrication and might allow for room-temperature synthesis by combining with high-energy mechanical milling or sintering using a high pressure such as hot isostatic pressing (HIP), spark plasma sintering (SPS), and cold sintering (CS).

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Section: Introductionmentioning

confidence: 99%

Ultralow-Temperature Synthesis and Densification of Ag₂CaV₄O₁₂ with Improved Microwave Dielectric Performances

Yin

Khaliq

et al. 2021

ACS Sustainable Chem. Eng.

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“…In the past decades, various vanadate nanomaterials have drawn significant attention due to their good performance in batteries, − catalysts, , and optical devices. , Due to the abundant calcium resource and diversity of the crystal structure, calcium vanadates have attracted great research interests. − Up to now, various calcium vanadate micro/nanomaterials have been reported, such as CaV 2 O 7 , CaV 2 O 6 , CaV 4 O 9 , Ca 3 (VO 4 ) 2 , Ca 10 V 6 O 25 , CaV 2 O 5 , and CaV 3 O 7 . Considering the multivalence of vanadium and the layered structural characteristics, calcium vanadates may be promising electrode materials. − However, the research on the application of calcium vanadate materials in lithium/sodium/zinc-ion batteries started late.…”

Section: Introductionmentioning

confidence: 99%

“…In the past decades, various vanadate nanomaterials have drawn significant attention due to their good performance in batteries, 1−8 catalysts, 9,10 and optical devices. 11,12 Due to the abundant calcium resource and diversity of the crystal structure, calcium vanadates have attracted great research interests.…”

Section: Introductionmentioning

confidence: 99%

Calcium Vanadate Micro/Nanostructures for Lithium-Ion Batteries

Zhang

Wang

Hou

et al. 2022

ACS Appl. Nano Mater.

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The ability to control the composition and structure of inorganic compounds by simple synthesis methods is essential to the design and development of electrode materials of lithium-ion batteries (LIBs). Here we report the controllable synthesis of calcium vanadate micro/nanostructures via a simple hydrothermal method. By easily adjusting the pH value of a reaction system, a Ca10V6O25 straw-bundle-like structure, Ca2V2O7 microplatelet, and CaV6O16·3H2O sponge-like macrostructure can be selectively synthesized. The regulation mechanism of different calcium vanadate micro/nanostructures was investigated. In addition, CaV6O16·3H2O and CaV6O16·3H2O/GO self-standing papers were obtained by pressing the sponge-like macrostructure and vacuum filtration, respectively. The electrochemical performances of the CaV6O16·3H2O and CaV6O16·3H2O/GO papers as the self-standing and binder-free anodes for LIBs were investigated for the first time. The as-obtained CaV6O16·3H2O/GO hybrid paper anode exhibits a high discharge capacity of 664.0 mA h g–1 after 250 cycles at 200 mA g–1 and good cycling stability, demonstrating its potential application as a self-standing anode for LIBs.

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“…Therefore, it is necessary to develop efficient treatment methods for the removal of CR from waste effluents. Some physical and chemical methods, such as coagulation/flocculation [11], filtration [12], oxidation [13][14][15][16][17][18][19][20], micellar enhanced ultrafiltration [21], adsorption [22][23][24][25][26], microbial degradation [27] have been used to remove dye pollutants. Adsorption is one of the most widely used methods due to its easy operation, cost effectiveness and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polymeric silica composites through polydopamine-mediated surface initiated ATRP for highly efficient removal of environmental pollutants

Huang

Wan

Jiang

et al. 2017

Materials Chemistry and Physics

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In this study, we developed a new procedure to prepare monodispersed functionalized SiO 2 (SiO 2-PDA-PDMC) composites via mussel inspired chemistry and surface initiated atom transfer radical polymerization (SI-ATRP). Samples were characterized by transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and thermal gravimetric analysis (TGA) measurements. TEM results showed that spherical morphology was unchanged after the functionalization. FT-IR results confirmed the successful modification with polydopamine (PDA) and the presence of poly-([2-(Methacryloyloxy) ethyl] trimethylammonium chloride) (PDMC) layer on the surface of SiO 2 spheres. TGA data showed that the PDMC account for about 12.12 wt.% in the sample of SiO 2-PDA-PDMC composites. The XPS analysis further confirmed the existence of PDMC on the surface of SiO 2-PDA-PDMC composites. The obtained SiO 2-PDA-PDMC composites were used as adsorbent for the removal of Congo red (CR) from aqueous solution to evaluate the performance in environment application. The effect of contact time, solution pH, initial CR concentration and temperature on the adsorption of CR onto SiO 2-PDA-PDMC composites was investigated. Adsorption results demonstrated that adsorption of CR onto SiO 2-PDA-PDMC composites was a fast and efficient process. The adsorption equilibrium reached within 60 min, and the adsorption process followed the pseudo-second-order model. The experimental data of isotherms were better described by the Freundlich model. Thermodynamic study depicted the endothermic nature of adsorption and the process was spontaneous. Results from the effect of solution pH on the CR adsorption showed that the acidic condition favors the adsorption and provided evidence for the contribution of PDMC on the SiO 2-PDA-PDMC composites in the removal of CR. This study suggests SiO 2-PDA-PDMC composites can be developed as a new adsorbent for the removal of anionic dyes from aqueous solution.

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Synthesis, surface and optical properties of Ag2CaV4O12 nanoparticles for dye removal under visible irradiation

Cited by 8 publications

References 38 publications

Ultralow-Temperature Synthesis and Densification of Ag₂CaV₄O₁₂ with Improved Microwave Dielectric Performances

Ultralow-Temperature Synthesis and Densification of Ag₂CaV₄O₁₂ with Improved Microwave Dielectric Performances

Calcium Vanadate Micro/Nanostructures for Lithium-Ion Batteries

Preparation of polymeric silica composites through polydopamine-mediated surface initiated ATRP for highly efficient removal of environmental pollutants

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Synthesis, surface and optical properties of Ag2CaV4O12 nanoparticles for dye removal under visible irradiation

Cited by 8 publications

References 38 publications

Ultralow-Temperature Synthesis and Densification of Ag2CaV4O12 with Improved Microwave Dielectric Performances

Ultralow-Temperature Synthesis and Densification of Ag2CaV4O12 with Improved Microwave Dielectric Performances

Calcium Vanadate Micro/Nanostructures for Lithium-Ion Batteries

Preparation of polymeric silica composites through polydopamine-mediated surface initiated ATRP for highly efficient removal of environmental pollutants

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Ultralow-Temperature Synthesis and Densification of Ag₂CaV₄O₁₂ with Improved Microwave Dielectric Performances

Ultralow-Temperature Synthesis and Densification of Ag₂CaV₄O₁₂ with Improved Microwave Dielectric Performances