Synthesis and photoluminescence properties of titanium oxide (TiO2) nanoparticles: Effect of calcination temperature

Horti, N. C.; Kamatagi, M. D.; Patil, N. R.; Nataraj, Sanna Kotrappanavar; Sannaikar, Madivalagouda S.; Inamdar, Sanjeev R.

doi:10.1016/j.ijleo.2019.163070

Cited by 41 publications

(17 citation statements)

References 43 publications

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“…In some works, the rise of calcination temperature led to the gradual transformation of the anatase to the rutile phase, and the complete change to the rutile form at the calcination temperature of 750 °C [31,32]. As shown in Figure 4, the ability to degrade DOX in water gradually rose with the increase in the calcination temperature from 200 to 500 °C, but declined from 600 to 800 °C, which could be due to the decrease of anatase crystalline structure, as evidenced in XRD results and reported in the literature [33,34]. This study used the light source from a UVA lamp with the highest intensity at a wavelength of 365 nm.…”

Section: Effect Of Calcination On the Photocatalytic Activitysupporting

confidence: 62%

Enhancement in Photocatalytic Efficiency of Commercial TiO2 Nanoparticles by Calcination: A Case of Doxycycline Removal

Tien

Nhut

Thuy

et al. 2022

Bull. Chem. React. Eng. Catal.

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In this study, the pure and calcined forms of Degussa TiO2 were applied for photocatalytic removal of doxycycline - a broad-spectrum tetracycline antibiotic. The calcination of TiO2 at 500 °C enhanced the photocatalytic efficiency of the TiO2 under optimal operational conditions of 5 ppm of doxycycline, 0.25 g/L of TiO2, pH 6.5, 120 min, and room temperature. In addition, the changes in morphology, crystal structure, and optical properties of the materials before and after calcination were observed by scanning electron microscopy, X-ray diffraction, and UV-Visible spectroscopy. The reaction kinetics of the doxycycline removal was also investigated based on the Langmuir-Hinshelwood model with a correlation coefficient R2 of >80%. Results showed that the photocatalytic ability of TiO2 is stable and enhanced after being calcined at a suitable temperature of 500 °C. This opens up the potential application of TiO2 in the treatment of emerging organic pollutants in water. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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Section: Effect Of Calcination On the Photocatalytic Activitysupporting

confidence: 62%

Enhancement in Photocatalytic Efficiency of Commercial TiO2 Nanoparticles by Calcination: A Case of Doxycycline Removal

Tien

Nhut

Thuy

et al. 2022

Bull. Chem. React. Eng. Catal.

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“…Similarly, the polycrystallinity was observed from the SAED pattern shown in Figure 2Bvi . Previous studies have shown the effect of calcination temperature and thus the effect of size on the optical properties of TiO 2 nanoparticles ( Lin et al, 2006 ; Pan et al, 2013 ; Horti et al, 2019 ) At higher calcination temperatures, the size of the nanoparticles and the induced oxygen vacancies are prominent ( Horti et al, 2019 ). A similar result is observed, at the calcination temperature of 450°C, the average size of the TiO 2 nanoparticles obtained was ∼115 nm ( Supplementary Figure S1 ).…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence-Based Bioassay With Cysteamine-Capped TiO2 Nanoparticles for the Selective Recognition of N-Acyl Homoserine Lactones

Vasudevan

Srinivasan

Neelakantan

et al. 2021

Front. Bioeng. Biotechnol.

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Currently available diagnostic procedures for infections are laborious and time-consuming, resulting in a substantial financial burden by increasing morbidity, increased costs of hospitalization, and mortality. Therefore, innovative approaches to design diagnostic biomarkers are imperative to assist in the rapid and sensitive diagnosis of microbial infections. Acyl homoserine lactones (AHLs) are ubiquitous bacterial signaling molecules that are found to be significantly upregulated in infected sites. In this pioneering work, we have developed a simple photoluminescence-based assay using cysteamine-capped titanium oxide (TiO2) nanoparticles for AHL detection. The PL intensity variation of the oxygen defect state of TiO2 was used for the biosensing measurements. The bioassays were validated using two well-studied AHL molecules (C4-HSL and 3-oxo-C12 HSL) of an important human pathogen, Pseudomonas aeruginosa. The developed system has a maximum relative response of 98%. Furthermore, the efficacy of the system in simulated host urine using an artificial urine medium showed a linear detection range of 10–160 nM. Also, we confirmed the relative response and specificity of the system in detecting AHLs produced by P. aeruginosa in a temporal manner.

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“…At the same time, TiO 2 gradually transforms from anatase phase to rutile phase with the increase of calcination temperature, and the anatase content produced at 450°C is the maximal. The dislocation of defects in anatase lattice can produce oxygen vacancies that promote electron-hole separation, and increase the photocatalytic performance of TiO 2 /ACF-Ac (Horti et al 2019). As the temperature of calcination rise without interruption, the grain of TiO 2 gradually grows, and the phenomenon of sintering or even channel collapse or blockage occurs that eventually change the character of composites speci c surface area and catalytic activity, making these performance reduce (Zhang et al 2016c).…”

Section: Removal Performance Of Toluene On Tio 2 /Acf-acmentioning

confidence: 99%

Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

Sun

Zhang

et al. 2021

Preprint

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Activated carbon fiber (ACF) was modified by Zn(NO3)2, ZnCl2 and Zn(CH3COO)2), respectively, and then TiO2 was loaded on the modified ACFs. The adsorption and photocatalysis performance were explored through the removal of toluene, and TiO2/ACF-Ac modified by Zn(CH3COO)2) with the best toluene performance was selected. The characterization results indicated that TiO2 was mainly loaded on the surface with large amount of oxygen-containing functional groups in anatase phase. The photoelectric chemical experiment results demonstrated that the modified ACFs remarkably improved the charge transmission and the separation efficiency of electrons and holes, and enhanced the utilization rate of sunlight. The adsorption saturation time reached 40 hours and photodegradation rate was 70%. The direct desorption of generated small molecule substances such as H2O and CO2 from the surface of the composites can achieve the in-situ regeneration of the adsorbent. Overall, the bifunctional catalysts provide a prospective way for the treatment of VOCs.

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Synthesis and photoluminescence properties of titanium oxide (TiO2) nanoparticles: Effect of calcination temperature

Cited by 41 publications

References 43 publications

Enhancement in Photocatalytic Efficiency of Commercial TiO2 Nanoparticles by Calcination: A Case of Doxycycline Removal

Enhancement in Photocatalytic Efficiency of Commercial TiO2 Nanoparticles by Calcination: A Case of Doxycycline Removal

Photoluminescence-Based Bioassay With Cysteamine-Capped TiO2 Nanoparticles for the Selective Recognition of N-Acyl Homoserine Lactones

Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

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