The partial substitution of Cd by La ions in CdWO4 nanocrystal for the efficiently enhanced electrochemical sensing of BPA

Hao, Chentao; Zhou, Yuanzhen; Dang, Yuan; Chai, Shouning; Han, Guoping; Li, Zonglu; Zhang, Haizhen; Zhang, Yichen

doi:10.1016/j.electacta.2019.06.100

Cited by 18 publications

(7 citation statements)

References 36 publications

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“…The above analysis from FE-SEM images indicated that Cu-doping leads to a reduction in the CdWO 4 crystal growth. The results are consistent with reported studies on Eu, Fe, and La-doped CdWO 4 , Cd-doped ZnWO 4 , and Cu-doped NiWO 4 and CaWO 4 nanostructures. ,,,,− Therefore, doping modifies the CdWO 4 lattice structure irrespective of the dopant type and possibly hinders its crystal growth through surface charge modification . The size reduction at a higher Cu content leads to high surface energy, which results in aggregation, as confirmed by the SEM images (Figure S1 and S2, Supporting Information).…”

Section: Resultssupporting

confidence: 89%

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

Gandhi

Chiu

et al. 2022

ACS Appl. Nano Mater.

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Monoclinic CdWO4 is a member of the tungstate family with great potential in diverse applications. However, CdWO4 exhibits a diamagnetic property with a wideband gap of 3.7 eV, limiting its widespread applications. This study reports significant modulation of magnetic and optical properties of hydrothermally grown single-crystalline CdWO4 nanorods with controllable substitution of Cu2+ ions at the Cd2+ site. The chemical environment of Cu and the magnetic and luminescence of nanorods were thoroughly investigated using synchrotron-based powder X-ray diffraction, temperature-dependent photoluminescence, X-ray absorption, element selective X-ray excited optical luminescence spectroscopies, a magnetometer, and micro-Raman spectroscopy. The main feature of this study is an astonishing redshift of ∼0.8 eV in the bandgap energy accompanied by a relative ∼46% drop in the internal quantum efficiency and a progressive transition from diamagnetic to an enhanced magnetization concerning the Cu content. The experimental findings show that significant modulation in optical and magnetic properties is correlated with Cu-doping-induced intermediate energy states and [CuO6] ferromagnetic clusters. The outcome of this study provides important insight into designing doped nanomaterials for photocatalytic applications.

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Section: Resultssupporting

confidence: 89%

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

Gandhi

Chiu

et al. 2022

ACS Appl. Nano Mater.

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“…According to the above analysis of the FE-SEM images, the reduction in CdWO 4 crystals is caused by Sn doping. The above findings are in line with studies that have been published on Cu-, Fe-, La-, and Eu-doped CdWO 4 and Cd-doped ZnWO 4 [ 1 , 28 , 32 , 33 , 34 , 35 , 36 ]. Therefore, doping changes the CdWO 4 lattice structure regardless of the type of dopant used, and it may even prevent crystal formation by changing the surface charge [ 37 ].…”

Section: Resultssupporting

confidence: 92%

Precise Sn-Doping Modulation for Optimizing CdWO4 Nanorod Photoluminescence

Manjunatha

Hsu

et al. 2022

IJMS

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The cadmium tungstate rods have been given much attention due to their potential for usage in numerous luminescent applications. We have prepared single crystalline Sn-doped Cd1−xSnxWO4 (where x = 0, 1, 3, and 5%) nanorods (NRDs) and characterized them using refined X-ray diffraction and TEM analysis, revealing a monoclinic phase and a crystallite size that decreased from 62 to 38 nm as Sn concentration increased. Precise Sn doping modulation in CdWO4 NRDs causes surface recombination of electrons and holes, which causes the PL intensity to decrease as the Sn content rises. The chromaticity diagram shows that an increase in the Sn content caused a change in the emission color from sky blue to light green, which was attributed to the increased defect density. The photoluminescence time decay curve of all samples fit well with double-order exponential decay, and the average decay lifetime was found to be 1.11, 0.93, and 1.16 ns for Cd1−xSnxWO4, x = 0, 1, and 5%, respectively. This work provides an understanding of the behavior of Sn-doped CdWO4 NRDs during electron transitions and the physical nature of emission that could be used in bio-imaging, light sources, displays, and other applications.

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“…The corresponding equivalent circuit (Figure S3) and electrochemical parameters (Table S5) deliver information that the series resistance R s stands for the resistance of the whole test system (ring-disk electrode and external wiring) . Simultaneously, shunt resistances R sh‑1 and R sh‑2 reflect the charge-transport resistances at the perovskite|ligand and ligand|MB electrolyte interfaces, respectively. − It is clear that the fitted resistance of R sh‑2 is nearly 10 times larger than that of R sh‑1 in the EIS spectra of γ-CsPbI 3 NCs. The large resistance of R sh‑2 gives rise to a serious impediment to carrier transport from ligands to the MB electrolyte and further decreases the amount of photogenerated carriers reacting with MB, which may be the reason for their restricted photochemical property (e.g., photocatalytic degradation property).…”

Section: Resultsmentioning

confidence: 99%

Enhanced Photocatalytic Property of γ-CsPbI₃ Perovskite Nanocrystals with WS₂

Zhang

Tai

Zhou

et al. 2019

ACS Sustainable Chem. Eng.

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Black perovskite-phase cesium lead tri-iodide (CsPbI 3 ) has shown great potential in photochemical applications. However, colloidal CsPbI 3 still suffers from the existence of ligands attached to the surface of nanocrystals (NCs) and serious photoluminescence (PL) quenching. Here, we develop two different γ-phase CsPbI 3 (γ-CsPbI 3 ) NCs/ WS 2 heterostructures with two different two-dimensional morphologies of WS 2 (nanoplates and few-layered WS 2 nanosheets) to improve the photocatalytic property of γ-CsPbI 3 NCs. The large surface area and the presence of abundant functional groups on the surface of WS 2 enable a bonding interaction with precursors in the mixture solution, which can reduce the number of ligands and promote the formation and crystal quality of γ-CsPbI 3 NCs. Exhilaratingly, we find that γ-CsPbI 3 NCs fabricated with few-layered WS 2 nanosheets exhibit a significant enhancement in their photocatalytic property, which may result from the increased amount and improved crystal quality of γ-CsPbI 3 NCs and the superior carrier-transport property of few-layered WS 2 nanosheets, and these effects are beneficial for producing abundant hydroxyl radicals to completely degrade methylene blue (MB). The fresh γ-CsPbI 3 NCs/few-layered WS 2 nanosheets show a high photocatalytic degradation efficiency of nearly 100% in 30 min, and completely degrade MB into low-weight and low-toxicity inorganic molecules without any intermediate degradation products.

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The partial substitution of Cd by La ions in CdWO4 nanocrystal for the efficiently enhanced electrochemical sensing of BPA

Cited by 18 publications

References 36 publications

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

Precise Sn-Doping Modulation for Optimizing CdWO4 Nanorod Photoluminescence

Enhanced Photocatalytic Property of γ-CsPbI₃ Perovskite Nanocrystals with WS₂

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The partial substitution of Cd by La ions in CdWO4 nanocrystal for the efficiently enhanced electrochemical sensing of BPA

Cited by 18 publications

References 36 publications

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO4 Nanorods for Photocatalytic Applications

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO4 Nanorods for Photocatalytic Applications

Precise Sn-Doping Modulation for Optimizing CdWO4 Nanorod Photoluminescence

Enhanced Photocatalytic Property of γ-CsPbI3 Perovskite Nanocrystals with WS2

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Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

Modulation of Magnetic and Luminescence Properties via Control Cu-Doped in CdWO₄ Nanorods for Photocatalytic Applications

Enhanced Photocatalytic Property of γ-CsPbI₃ Perovskite Nanocrystals with WS₂