Determination of the crystallinity of TiO2 photocatalysts

Bellardita, Marianna; Paola, A. Di; Megna, Bartolomeo

doi:10.1016/j.jphotochem.2018.08.042

Cited by 73 publications

(32 citation statements)

References 51 publications

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“…Among them, semiconductor heterogeneous photocatalysis has enormous potential to treat organic contaminants, having gained growing acceptance as an effective wastewater treatment method to degrade a broad variety of harmful compounds. Although a wide variety of semiconductors have been reported to be effective photocatalysts [4][5][6][7][8][9][10][11][12][13], TiO 2 is still the most widely used semiconductor in photocatalysis because it is a cost effective non-toxic compound, chemically and biologically inert, thermally stable, superhydrophilic, and capable of promoting the oxidation of numerous organic compounds [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2

et al. 2019

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TiO 2 and TM-doped TiO 2 (TM = Re, Ru) anatase crystalline nanopowders were synthesized by a simple hydrothermal method. Samples with nominal TM/Ti ratio of 0.01 were prepared for this study. Their structural, microstructural and optical properties were studied. The lattice parameters of the different prepared samples were calculated and their mean crystallite sizes determined to be in the range 15-7 nm, the lower values being obtained for the doped crystallites. The samples' specific surface areas were determined and correlated with their mean crystallite sizes. The incorporation of the dopant elements results in an increase of the optical absorption in the visible range. The samples' optical bandgap and Urbach energies were calculated from UV-Vis diffuse reflectance spectra. The photocatalytic behavior of the synthesized samples was investigated for the rhodamine B and phenol degradation processes, the kinetics of the different photo-oxidation reactions being also studied. The results showed that doping either with Re or Ru can lead to enhancement of the TiO 2 photocatalytic efficiency and that, among the synthesized samples Ru-doped TiO 2 is the most efficient photocatalyst for both the Rhodamine B and phenol photodegradation reactions.

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Section: Introductionmentioning

confidence: 99%

Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2

et al. 2019

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“…Heterogeneous photocatalysis is an appealing low-temperature and pressure technology for its promising applications in the area of solar energy, green chemistry, and environmental remediation (Bellardita et al, 2018). The potential of harnessing photocatalysis for the treatment of water was first discovered in 1972 by (Fujishima and Honda, 1972) which was founded based on the photo-electrochemical water splitting by using titania as the semiconductor catalyst.…”

Section: Heterogeneous Photocatalysis As An Advanced Oxidation Processmentioning

confidence: 99%

Photocatalytic Degradation of Pharmaceuticals Using TiO<sub>2</sub> Based Nanocomposite Catalyst-Review

Khasawneh

Palaniandy

2019

Civil and Environmental Engineering Reports

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The occurrence of contaminants of emerging concern (CECs) such as pharmaceutical compounds (PhACs) is becoming a major global issue due to the persistence, bioaccumulation, and toxicity of these pollutants. Human and animal consumption was recognized as the major sources for pharmaceutical pollution. Existent conventional treatment processes have shown low degradation efficiencies towards PhACs. In this regard, TiO2 based nanocomposite photocatalysis process has presented effective degradation towards PhACs. Operational parameters such as dopant content, catalyst loading, and initial pH were the major factors in the photocatalysis system. In this review, we discuss the recent studies that have employed TiO2 based nanocomposite for the degradation of PhACs. Future research recommendations have also been elaborated.

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“…In recent years, metal oxide semiconductors have attracted the attention of the scientific community due to their high photocatalytic capacity under irradiation with ultraviolet (UV) light for the degradation of various dyes [7]. Among the most used photocatalysts are ZnO [8], SnO 2 [9,10], TiO 2 [11,12], and CuO [13]. One of the materials that has drawn attention due to its morphology, structure, and optical and electrical properties is tin dioxide (SnO 2 ) [14]; which is presented as a type n semiconductor with a 3.6 eV band gap [15].…”

Section: Introductionmentioning

confidence: 99%

SnO2 nanoparticles synthesized with Citrus aurantifolia and their performance in photocatalysis

Luque¹,

Nava²,

Soto-Robles

et al. 2020

J Mater Sci: Mater Electron

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This research presents an alternative tin oxide (SnO 2) nanoparticles synthesis method using different concentrations of Citrus aurantifolia peel extract as reducing agent. We report the chemical identification protocol for polyphenols in the peels via FTIR, the characterization of the SnO 2 nanoparticles by FTIR, XRD, HRTEM, and UV-vis. The SnO 2 nanoparticles presented the Sn-O-Sn bond at 640 cm −1 and crystal growth with a clearly tetragonal structure. Depending on the amount of extract used, hemispherical nanoparticles of different sizes (5-12 nm) and band gap values ranging from 3.02 to 3.44 eV were obtained. Photocatalytic degradation studies of the synthesized SnO 2 were carried out using methylene blue under UV light. The sample with 4% extract of C. aurantifolia showed a degradation rate of about 96% at 120 min. The use of C. aurantifolia as a reducing agent in the synthesis of SnO 2 nanoparticles helps the properties and has control over the morphology of the nanoparticles.

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Determination of the crystallinity of TiO2 photocatalysts

Cited by 73 publications

References 51 publications

Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2

Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2

Photocatalytic Degradation of Pharmaceuticals Using TiO<sub>2</sub> Based Nanocomposite Catalyst-Review

SnO2 nanoparticles synthesized with Citrus aurantifolia and their performance in photocatalysis

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