Improved electrochromic performance of WO3 films with size controlled nanorods

Yuan, Guangzhong; Hua, Chenzheng; Khan, Shahid Ali; Jiang, Shanshan; Wu, Zhe; Liu, Yong; Wang, Jianxun; Song, Chenlu; Han, Gaorong

doi:10.1016/j.electacta.2017.10.193

Cited by 40 publications

(20 citation statements)

References 35 publications

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“…In this way, 0D (dots), 1D (rods, whiskers, and fibres), 2D (plates, films), or 3D (large particles, blocks) WO 3 materials can be synthesized. Various types of nanostructured tungsten oxide have been reported, from simple, spherical nanoparticles [34] to WO 3 -based aerogel networks [35], quantum dots [36][37][38][39], nanostructured films [40] (including nanoplate films [41], nanorod films [42], honeycomb-structured films [43], and mesoporous films [44]), nanobelts [45], nanofibres [46], nanowires [30,46,47], bundle-like nanowires [30,48], nanonetworks [49], hollow spheres [50], macroporous spheres [51], wedge-like architectures [52], nanorods [53,54], nanocuboids [34], square nanoplates [55], nanosheets [56], nanoleaves [57], and urchin-like [30,58], flower-like [59][60][61], and tree-like nanostructures [62,63], etc.…”

Section: Introductionmentioning

confidence: 99%

Highly Crystalline WO₃ Nanoparticles Are Nontoxic to Stem Cells and Cancer Cells

Han

Попов

Шекунова

et al. 2019

Journal of Nanomaterials

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Tungsten oxide sol, containing highly crystalline nanoparticles of orthorhombic WO3 and having good sedimentation stability, was synthesized using a facile, ultrasonic-assisted technique. An additional steric stabilizer, dextran, was proposed to enhance the stability of WO3 nanoparticles in biological media and to reduce their in vivo toxicity. The cytotoxicity of dextran-stabilized and nonstabilized WO3 sols was studied in vitro using dental pulp stem (DPS) cell lines and breast cancer (MCF-7) cell lines. Both tungsten oxide sols demonstrated low cytotoxicity and low genotoxicity for both stem cells and malignant cells and only slightly reduced their metabolic activity in the concentration range studied (from 0.2 to 200 μg/ml). The data obtained support possible theranostic applications of tungsten oxide colloidal solutions.

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Section: Introductionmentioning

confidence: 99%

Highly Crystalline WO₃ Nanoparticles Are Nontoxic to Stem Cells and Cancer Cells

Han

Попов

Шекунова

et al. 2019

Journal of Nanomaterials

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“…Similar results have been reported. 40 Additionally, the ratio of 4f 7/2 and 4f 5/2 was determined as 4:3 according to the corresponding area of peaks. The existence of W 5+ at a low level in the WO 3 lattice will be favorable for NIR absorption associated with the hopping between two neighboring sites of W 5+ and W 6+ .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Antibacterial Activity of Polyvinyl Alcohol/WO₃ Films Assisted by Near-Infrared Light and Its Application in Freshness Monitoring

Wang

Zhang

et al. 2021

J. Agric. Food Chem.

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Nowadays, films with antibacterial activity and applied for freshness monitoring by colorimetric response have been drawing growing attention in food packaging. However, the development of versatile antibacterial and colorimetric agents is still highly desirable. Herein, WO3 nanorods are incorporated in a polyvinyl alcohol (PVA) matrix to develop a novel composite film with photothermal antibacterial activity and freshness monitoring faculty. The interaction between WO3 nanorods and PVA is due to hydrogen bonds. Compared with the PVA film, the presence of WO3 nanorods can significantly enhance the mechanical and barrier properties; typically, the target film (WO3/PVA)4 shows an increase in tensile strength by 52.7% and Young’s modulus by 400.0% and a decrease in oxygen permeability by 72.4% and water vapor permeability by 66.9%. The films demonstrate a WO3 content-dependent antibacterial activity. Under irradiation of near-infrared light (NIR808), the synergistic effect of physical damage, oxidative stress, and temperature increase markedly improves the antibacterial activity of (WO3/PVA)4, showing an antibacterial efficiency of ∼90% against Escherichia coli or beyond 90% against Staphylococcus aureus. The incorporated WO3 nanorods demonstrate lower cytotoxicity toward the model cells of human colon cancer cell line HT-29. The (WO3/PVA)4 film exhibits colorimetric response to H2S and can also be used for pork freshness monitoring as an indicator.

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“…For the WO 3 nanorod, it was evident that all the sharp diffraction peaks could be classified as the monoclinic phase of WO 3 , and the results matched well with the standard JCPDS data (card No. 83-0951) 28 . Moreover, we observed the graphene peak (002) at 2θ of ~26°.…”

Section: Resultsmentioning

confidence: 99%

Hybrid of Graphene based on quaternary Cu2ZnNiSe4 –WO3 Nanorods for Counter Electrode in Dye-sensitized Solar Cell Application

Cho

Jung

et al. 2020

Sci Rep

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A novel nanohybrid of graphene-based Cu 2 ZnniSe 4 with WO 3 nanorods (G-CZNS@W) was successfully synthesized via a simple hydrothermal method to use as a counter electrode (ce) for dye-sensitized solar cells (DSSCs). The characterization technique confirmed the structural and morphologies of the G-CZNS@W nanohybrid, which could show rapid electrons transfer pathway through the WO 3 nanorods. Moreover, the as-fabricated G-CZNS@W nanohybrid exhibited synergetic effect between G-cZnS and a Wo 3 nanorod, which could affect the electrocatalytic activity towards triiodide reaction. The nanohybrid exhibits an excellent photovoltaic performance of 12.16%, which is higher than that of the standard pt electrode under the same conditions. the G-cZnS@W nanohybrid material as ce thus offers a promising low-cost Pt-free counter electrode for DSSC. Extracting energy from fossil fuels is the major cause of environmental pollution. Solar energy, a source of renewable energy, could be considered as an alternative source of energy. Dye-sensitized solar cells (DSSCs) are the most promising renewable energy devices, as was reported by Michael Grätzel in 1991 1. These DSSCs devices have been introduced into the market to convert the renewable incident solar radiation into electricity with high power conversion efficiency, low-cost fabrication, and in an environmentally benign manner 2. Generally, DSSCs consist of (1) the working electrode, which is coated by a thin, mesoporous layer of a semiconductor, usually TiO 2 , on whose surface a monolayer of dye molecules is adsorbed; and (2) the counter electrode, which is coated with a thin catalyzer layer, usually Pt electrode. The space between the two electrodes is filled with an electrolyte containing a redox couple (often I − /I 3 −) 3,4. Major research efforts have been undertaken to find alternatives to the traditional Pt CE. Because of its high cost and low resources, a better alternative to Pt is required for commercial applications. Some of the counter electrodes with high efficiency reported so far have included carbonaceous materials, such as carbon 5 , graphene 6 , and N-doped carbon 7 ; polymers, such as Polyaniline nanotube 8 , PEDOT:PSS/halloysite 9 , and poly α-naphtylamine 10 ; metal sulphides, such as PbS 11 , FeS 2 12 , and CoS 2 13 ; metal oxides, such as CoFe 2 O4 14 , MnO 2 15 , and WO 3 16 ; and quaternary material, such as Cu 2 ZnSnS 4 17

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Improved electrochromic performance of WO3 films with size controlled nanorods

Cited by 40 publications

References 35 publications

Highly Crystalline WO₃ Nanoparticles Are Nontoxic to Stem Cells and Cancer Cells

Highly Crystalline WO₃ Nanoparticles Are Nontoxic to Stem Cells and Cancer Cells

Antibacterial Activity of Polyvinyl Alcohol/WO₃ Films Assisted by Near-Infrared Light and Its Application in Freshness Monitoring

Hybrid of Graphene based on quaternary Cu2ZnNiSe4 –WO3 Nanorods for Counter Electrode in Dye-sensitized Solar Cell Application

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Improved electrochromic performance of WO3 films with size controlled nanorods

Cited by 40 publications

References 35 publications

Highly Crystalline WO3 Nanoparticles Are Nontoxic to Stem Cells and Cancer Cells

Highly Crystalline WO3 Nanoparticles Are Nontoxic to Stem Cells and Cancer Cells

Antibacterial Activity of Polyvinyl Alcohol/WO3 Films Assisted by Near-Infrared Light and Its Application in Freshness Monitoring

Hybrid of Graphene based on quaternary Cu2ZnNiSe4 –WO3 Nanorods for Counter Electrode in Dye-sensitized Solar Cell Application

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Product

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Highly Crystalline WO₃ Nanoparticles Are Nontoxic to Stem Cells and Cancer Cells

Highly Crystalline WO₃ Nanoparticles Are Nontoxic to Stem Cells and Cancer Cells

Antibacterial Activity of Polyvinyl Alcohol/WO₃ Films Assisted by Near-Infrared Light and Its Application in Freshness Monitoring