Principal component analysis of Raman spectra for TiO 2 nanoparticle characterization

Ilie, Alina; Scarisoareanu, Monica; Morjan, I.; Dutu, Elena; Badiceanu, Maria; Mihăilescu, I. N.

doi:10.1016/j.apsusc.2017.01.193

Cited by 105 publications

(28 citation statements)

References 38 publications

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“…2b. Raman spectrum of pristine TiO 2 NFs demonstrates five shifts corresponding to anatase phase (143,197,396,516, and 639 cm -1 ), and two shifts that belong to rutile phase (448 and 612 cm -1 ) [10]. The same spectral feature can be noticed in the Raman spectrum of the TiO 2 /RhA sample.…”

Section: Resultssupporting

confidence: 66%

Enhanced Photocatalytic Performance of Surface-Modified TiO2 Nanofibers with Rhodizonic Acid

Mwandeje

Wangatia

et al. 2020

Adv. Fiber Mater.

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The improvement of the photocatalytic performance of TiO 2 nanofibers (NFs), prepared by electrospinning, is achieved by surface modification with the rhodizonic acid (RhA). The condensation reaction between hydroxyl groups from TiO 2 NFs and RhA is accompanied by the red-shift of optical absorption due to interfacial charge transfer (ICT) complex formation. Crystal structure, morphology, and optical properties of unmodified and surface-modified TiO 2 NFs were analyzed. The photocatalytic performance of prepared samples has been examined through degradation of organic dye methylene blue. Superior photocatalytic activity of surface-modified TiO 2 NFs with RhA is attributed to their enhanced optical properties, i.e., the ability to harvest the photon energy in the visible spectral range.

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Section: Resultssupporting

confidence: 66%

Enhanced Photocatalytic Performance of Surface-Modified TiO2 Nanofibers with Rhodizonic Acid

Mwandeje

Wangatia

et al. 2020

Adv. Fiber Mater.

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“…Micro-Raman spectroscopy has been carried out for further analysis of the structural phases of pure and Fe-doped TiO 2 NPs, as shown in Figure 4. Anatase phase of titanium dioxide has six Raman active modes A 1g + 2B 1g + 3E g at 144 cm −1 (E g ), 197 cm −1 (E g ), 399 cm −1 (B 1g ), 516 cm −1 (A 1g + B 1g ), and 639 cm −1 (E g ), which were identi ed on the Raman spectra of all the samples under discussion [51]. It has been shown that any peak associated with iron oxide are not observed, even with a highly doped sample.…”

Section: Raman Spectroscopymentioning

confidence: 85%

Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Solano

Herrera

Maestre

et al. 2019

Journal of Nanotechnology

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Anatase TiO2 nanoparticles doped with iron ions have been synthesized via the green chemistry method using aqueous extract of lemongrass (Cymbopogon citratus) obtained from Soxhlet extraction and doped by wet impregnation. The TiO2 anatase phase has been doped with Fe3+ (0.05, 0.075, and 0.1 Fe3+ : Ti molar ratio) at 550°C and 350°C, respectively. The scanning electron microscopy with energy-dispersive X-ray (SEM-EDS) shows nanoparticle clusters and efficiencies of impregnations between 66.5 and 58.4% depending on the theoretical dopant amount. The electron transmission microscopy (TEM) reveals final particle sizes ranging between 7 and 26 nm depending on the presence or not of the dopant. The cathodoluminescence (CL) and photoluminescence (PL) studies of the doped and undoped nanoparticles show a luminescence signal attributed to surface oxygen vacancies (visible CL emission 380–700 nm and PL emission 350–800 nm); additionally, a decrease in emission intensity is observed due the inhibition of the recombination of the photogenerated electron-holes pairs; moreover, nanopowders were analyzed by UV-Vis spectrophotometry of diffuse reflectance, and the absorption edge of the Fe-TiO2 in comparison to undoped TiO2 is extended greatly toward the visible light. The six bands (A1g + 2B1g + 3Eg) found by Raman spectroscopy and the x-ray diffraction pattern (XRD) confirm that synthesized TiO2 is only anatase phase, which is commonly used as a catalyst in waste water treatment, specifically in heterogeneous photocatalytic processes.

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“…Figure 1C projects the particle counts histogram of FEG: SEM image 1 A, the grown particles were in the range of 1–14 nm, where maximum number of NPs had a count of 5–6 nm. The Raman spectra processing of TiO 2 samples shows that the grown nanoparticles are having two Anatase and Rutile modes 30 (Fig. 1D).…”

Section: Resultsmentioning

confidence: 98%

Inhibition of snake venom induced sterile inflammation and PLA2 activity by Titanium dioxide Nanoparticles in experimental animals

Chakrabartty

Alam

Bhagat

et al. 2019

Sci Rep

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Sterile inflammation (SI) is an essential process in response to snakebite and injury. The venom induced pathophysiological response to sterile inflammation results into many harmful and deleterious effects that ultimately leads to death. The available treatment for snakebite is antiserum which does not provide enough protection against venom-induced pathophysiological changes like haemorrhage, necrosis, nephrotoxicity and often develop hypersensitive reactions. In order to overcome these hindrances, scientists around the globe are searching for an alternative therapy to provide better treatment to the snake envenomation patients. In the present study TiO 2 (Titanium dioxide)-NPs (Nanoparticles) has been assessed for antisnake venom activity and its potential to be used as an antidote. In this study, the synthesis of TiO 2 -NPs arrays has been demonstrated on p-type Silicon Si < 100 > substrate (∼30 ohm-cm) and the surface topography has been detected by Field-emission scanning electron microscopy (FESEM). The TiO 2 -NPs successfully neutralized the Daboia russelii venom (DRV) and Naja kaouthia venom (NKV)-induced lethal activity. Viper venom induced haemorrhagic, coagulant and anticoagulant activities were effectively neutralized both in in-vitro and in vivo studies. The cobra and viper venoms-induced sterile inflammatory molecules (IL-6, HMGB1, HSP70, HSP90, S100B and vWF) were effectively neutralised by the TiO 2 -NPs in experimental animals.

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Principal component analysis of Raman spectra for TiO 2 nanoparticle characterization

Cited by 105 publications

References 38 publications

Enhanced Photocatalytic Performance of Surface-Modified TiO2 Nanofibers with Rhodizonic Acid

Enhanced Photocatalytic Performance of Surface-Modified TiO2 Nanofibers with Rhodizonic Acid

Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Inhibition of snake venom induced sterile inflammation and PLA2 activity by Titanium dioxide Nanoparticles in experimental animals

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Principal component analysis of Raman spectra for TiO 2 nanoparticle characterization

Cited by 105 publications

References 38 publications

Enhanced Photocatalytic Performance of Surface-Modified TiO2 Nanofibers with Rhodizonic Acid

Enhanced Photocatalytic Performance of Surface-Modified TiO2 Nanofibers with Rhodizonic Acid

Fe-TiO2 Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Inhibition of snake venom induced sterile inflammation and PLA2 activity by Titanium dioxide Nanoparticles in experimental animals

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Product

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Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment