Facile synthesis and comparative study for the optical performance of different TiO2 phases doped PVA nanocomposite films

Morad, Ibrahim; Alshehri, A.M.; Mansour, Ahmed; Wasfy, M. H.; El‐Desoky, M. M.

doi:10.1016/j.physb.2020.412415

Cited by 30 publications

(15 citation statements)

References 38 publications

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“…Similar crystalline patterns were obtained for the rutile titania samples (2T to 10T). Figure 1b shows the reported refence XRD pattern of rutile titania with the 21-1276 JCPDS data and that the crystalline plane hkl values were very well matched with our prepared rutile titania sample [18][19][20]. The specific surface area of the prepared materials was determined using the Brunauer-Emmett-Teller (BET) method [21,22].…”

Section: Crystallinity and Surface Area Characterizationmentioning

confidence: 67%

“…Thus, the conditions of hydrothermal reactions followed in the present study were solely responsible for the formation of high pure phase formation [16,17]. Figure 1a shows the XRD pattern for rutile TiO 2 and that the pattern obtained for 4T possessed peaks corresponding to the planes of TiO 2 at 2θ = 27.4 (110), 36.0 (101), 39.1 (200), 41.2 (111), 44.0 (210), 54.3 (211), 56.6 (220), 62.7 (002), 64.0 (310) and 69.0 (301), respectively [18][19][20]. This pattern showed high crystallinity with well-resolved feature characteristics that corresponded to rutile TiO 2 , and the respective 2θ values were very well-matched with the 21-1276 JCPDS data [21].…”

Section: Crystallinity and Surface Area Characterizationmentioning

confidence: 93%

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Characterization of Pure Rutile Titania Nanoparticle Prepared by Feasible Method for Coatings and Visible Light-Driven Dye Removal Application

et al. 2021

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The pure phase of rutile titanium dioxide or titania (R-TiO2) was prepared by means of a strong acidic sol–gel process followed by treatment using a hydrothermal method. The as-prepared titania nanoparticles existed purely in the rutile phase instead of the mixed anatase phase of the respective titania (R-TiO2). The optimized reaction condition and precursor usage were the critical parameters for the formation of the particle size and uniform crystallinity of the rutile phase of TiO2 nanoparticle fabrication. XRD (X-ray diffraction), and Raman spectroscopic techniques were utilized to confirm the formation of the pure rutile phase of titania. SEM (scanning electron microscope) and TEM (Transmission electron microscope) images showed the cauliflower-like morphology of the as-prepared R-TiO2; reduced particle sizes of below 5 nm were observed and confirmed through high resolution images. The catalytic activity of the as-prepared R-TiO2 was tested under visible light irradiation for methylene blue dye degradation reactions. Dye degradation occurred very effectively, even at higher concentrations of methylene blue (MB), at reduced time intervals from 5 to 3 h of reaction time. The as-prepared rutile phase of pure titania nanoparticles was applied in a catalysis application for the purpose of inducing various types of organic dye degradation or catalytic transformation in the presence of visible light.

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Section: Crystallinity and Surface Area Characterizationmentioning

confidence: 67%

Section: Crystallinity and Surface Area Characterizationmentioning

confidence: 93%

Characterization of Pure Rutile Titania Nanoparticle Prepared by Feasible Method for Coatings and Visible Light-Driven Dye Removal Application

et al. 2021

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“…The XRD patterns of the films are shown in Figure 9 a. Two obvious bands existed at 2θ = 19.6 and 28.5°, which are attributed to the semi-crystalline phase of the PVA [ 58 ]. It is notable that for the PPy/ND film, the peak at 2θ = 28.5° disappeared, indicating a decrease in PVA crystallinity, which could have resulted from the heterogeneous dispersion of PPy/ND in PVA.…”

Section: Resultsmentioning

confidence: 99%

Design of Flexible Film-Forming Polydopamine/Polypyrrole/Nanodiamond Hierarchical Structure for Broadband Microwave Absorption

et al. 2022

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Microwave-absorbing materials are widely used in numerous fields, including the military, daily protection, etc. Currently, in addition to being lightweight and highly efficient, good film-forming processing characteristics and environmental stability are also required for the practical application of microwave-absorbing materials, which, in general, are difficult to make compatible. In this paper, a mulberry-like PDA/PPy/ND hierarchical structure was prepared by in situ polymerization. The hierarchical structure showed remarkably enhanced microwave absorption, as well as better flexible film-forming characteristics, thanks to the multiple roles PDA played in the system. The optimal RL peak for PDA/PPy/ND could reach −43.6 dB at 7.58 GHz, which is mainly attributed to the multiple dielectric loss paths and significantly improved impedance-matching characteristics. Furthermore, given the H-bond crosslink, the introduction of PDA also promoted the film formation and dispersion of PDA/PPy/ND in the PVA matrix, forming a water-resistant and flexible film. This work provides a referencing path for the design and practical applications of lightweight microwave-absorbing materials.

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“…It is clear that, the transmission slight changes with the addition of CuO NTs and Asp to the PVA. This indicates very good transmission spectra in the UV region (200-250 nm) related to the PVA bandgap[75]. The practically good transmittance of the polymer films in the visible region (400-800 nm) is due to the normal dispersion of the light.…”

mentioning

confidence: 82%

Novel PVA nanocomposite films: Synthesis, structure, optical and photocatalytic properties evaluation.

Amaregouda¹,

Kamanna²

2021

Preprint

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The present work describes design and preparation of novel PVA nanocomposite films using CuO NTs and Asp by solution casting method. The required CuO NTs prepared by novel biogenic method using Robinia Pseudoacacia Leaf Extract. The prepared CuO NTs and nanocomposite films are characterized by various spectroscopy techniques. The adsorption and photocatalytic efficiencies of PVA nanocomposite films were compared with pristine CuO NTs. The adsorption capacity of PVA nanocomposite films showed higher due to functional groups, presence of active sites, high surface activity and semiconducting nature of CuO NTs and Asp embedded in PVA matrix. The adsorption behavior of the nanocomposite shows that adsorption isotherms and kinetics are in good agreement with Langmuir equation, Freundlich equation and pseudo-second-order, respectively. The comparative photocatalytic activities of the CuO NTs other nanocomposite films are examined methylene blue (MB) as a substrate degradation, and film PVA/CuO NTs/Asp showed highest (up to 77%) degradation compared to other films and CuO NTs in 50 min time duration. The improved photocatalytic behavior of PVA nanocomposite film attributed to its narrower band gap reduces the recombination rate of exited electron-hole, enhanced UV-Vis absorption intensity, improved utilization of sunlight and enhanced adsorption of dye due to functional groups, surface wettability, hydrophilic surface and self-cleaning nature.

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Facile synthesis and comparative study for the optical performance of different TiO2 phases doped PVA nanocomposite films

Cited by 30 publications

References 38 publications

Characterization of Pure Rutile Titania Nanoparticle Prepared by Feasible Method for Coatings and Visible Light-Driven Dye Removal Application

Characterization of Pure Rutile Titania Nanoparticle Prepared by Feasible Method for Coatings and Visible Light-Driven Dye Removal Application

Design of Flexible Film-Forming Polydopamine/Polypyrrole/Nanodiamond Hierarchical Structure for Broadband Microwave Absorption

Novel PVA nanocomposite films: Synthesis, structure, optical and photocatalytic properties evaluation.

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