Preparation of high-refractive-index PMMA/TiO2 nanocomposites by one-step in situ solvothermal method

Jin, Jieyu; Qi, Rongrong; Su, Yunfeng; Tong, Mingkang; Zhu, Jian

doi:10.1007/s13726-013-0175-x

Cited by 45 publications

(24 citation statements)

References 26 publications

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“…5 reveals that the incorporation of Al powder into PVA polymer matrix can tune the refractive index of the composite samples and consequently increase the n value from 1.1 to about 2.14. Jin et al [17], reported that the refractive index of PMMA can be increased from 1.49 to 1.839 upon the addition of 20 wt% of TiO 2 which is lower than that obtained in this work for PVA incorporated with Al particles. In our previous work we reported the increase of refractive index from 1.14 for pure PVA to 2.25 for PVA doped with 12 wt% of NaNO 3 salt [18].…”

Section: Resultscontrasting

confidence: 82%

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Tuning the absorption of ultraviolet spectra and optical parameters of aluminum doped PVA based solid polymer composites

Aziz

Ahmed

Hussein

et al. 2015

J Mater Sci: Mater Electron

158

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In this research work PVA:xAl (0.01 B x B 0.05) based solid polymer composites have been prepared by solution cast technique. The transmittances of the samples are decreased with increasing Al powder concentration. The absorption spectra of the samples are shifted to higher wavelengths which indicate their importance for shielding. The increase of absorption intensity in UV region was observed. The clear shift of absorption edge upon the addition of Al powder content indicated the decrease of energy band gap. The increase of extinction coefficient at high wavelengths for the samples containing Al powder revealed the loss of photon energy. The refractive indexes of the doped samples are increased compared to that of pure PVA.The linear relationship between the refractive index and volume fraction indicates a good dispersion of Al powder in PVA host polymer. The direct optical band gap measured from the plot of (aht) 2 versus photon energy (ht) showed a decreasing trend with increase of Al content. The Urbach energy was found to increase with increasing aluminum concentration. The complex optical dielectric functions were used to determine the type of electron transition.

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Section: Resultscontrasting

confidence: 82%

“…It can be seen from Fig. 6 that the refractive [17,19,20]. The regression value is 0.97 as exhibited in Fig.…”

Section: Resultsmentioning

confidence: 71%

Tuning the absorption of ultraviolet spectra and optical parameters of aluminum doped PVA based solid polymer composites

Aziz

Ahmed

Hussein

et al. 2015

J Mater Sci: Mater Electron

158

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“…The values of n achieved in this work are compared with those in the previous studies as shown in Table 4 . Jin et al [ 50 ] documented that the n of poly(methyl methacrylate) (PMMA) was enhanced from 1.49 to 1.839 upon the insertion of 20 wt % TiO 2 , which is smaller than that achieved in this study for the PS doped with SnTiO 3 NPs. In our earlier study, we found an increase of n from 1.14 (pure PVA) to 2.25 for the PVA incorporated with 12 wt % of NaNO 3 salt [ 51 ].…”

Section: Resultscontrasting

confidence: 80%

Steps Toward the Band Gap Identification in Polystyrene Based Solid Polymer Nanocomposites Integrated with Tin Titanate Nanoparticles

et al. 2020

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In the current study, the film fabrication of polystyrene (PS) based polymer nanocomposites (NCs) with tuned refractive index and absorption edge was carried out using the solution cast method. X-ray diffraction (XRD) and ultraviolet-visible (UV-Vis) light characterization techniques were performed. The structural and optical properties of the prepared films were specified. The hump of PS decreased significantly when SnTiO3 nanoparticles (NPs) were introduced. Sharp and high intense peaks of SnTiO3 NPs at a high filler ratio were observed. The crystalline size was determined for SnTiO3 NPs from the sharp crystalline peaks using Debye-Scherrer’s equation and was found to be 25.179 nm, which is close enough to that described by the supplier. Several optical parameters, such as absorption coefficient (α), refractive index (n), and optical dielectric properties, were investigated. The absorption spectra were tuned with increasing SnTiO3NPs. Upon the addition of the NPs to the PS host polymer, the absorption edge undergoes shifting to lesser photon energy sides. The optical dielectric constant (ε′) was correlated to the refractive index. The study of the optical band gap was conducted in detail using both Tauc’s model and the optical dielectric loss (ε″) parameter. The results showed that the ε″ parameter is noteworthy to be measured in the optical band gap study of materials.

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“…But they normally show low refractive index [J. Jin at al., 2013]. (Polyvinyl alcohol) (PVA) is a polymeric material which is soluble in water, a good charge storage capacity, has a high dielectric strength, and interesting optical properties [D. M.…”

Section: Introductionmentioning

confidence: 99%

Evolution of the optical properties of PVA film filled with CuCl

kwekha

2019

J. Gar. Univ.

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Polyvinyl alcohol (PVA) has been doped by different percentage of Copper Chloride (CuCl), films for different weight ratio (0, 1, 1.5, and 2%) were prepared by the well-known solution cast method. The optical properties were obtained in the wavelength range (190-1100) nm. Results show that for the pure PVA films the optical constants were increased after doping and with increasing impurity concentration. For indirect allowed transition the optical energy gap decreases from 4.6 eV (for pure PVA) to 3.8 eV (for PVA+2%CuCl). The results show the absorption edge for electrolyte samples moves toward a lower energy region by increasing the salt concentration, leading to the band gap reduction. This study shows that the optical properties of PVA are affected by salt concentration. Article Info

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Preparation of high-refractive-index PMMA/TiO2 nanocomposites by one-step in situ solvothermal method

Cited by 45 publications

References 26 publications

Tuning the absorption of ultraviolet spectra and optical parameters of aluminum doped PVA based solid polymer composites

Tuning the absorption of ultraviolet spectra and optical parameters of aluminum doped PVA based solid polymer composites

Steps Toward the Band Gap Identification in Polystyrene Based Solid Polymer Nanocomposites Integrated with Tin Titanate Nanoparticles

Evolution of the optical properties of PVA film filled with CuCl

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