Enhanced effect of combination of new hybrid TiO2 phase and phosphorus dopant on the physicochemical properties and UV/Visible light photocatalytic activity

Stambolova, I.; Stoyanova, D.; Shipochka, Мaria; Blaskov, V.; Nihtianova, D.; Марков, П. В.; Eliyas, A.; Mladenova, Ralitsa; Dimitrov, L.; Abrashev, M. V.; Avdeev, G.; Zaharieva, Katerina

doi:10.1016/j.matchar.2020.110775

Cited by 10 publications

(6 citation statements)

References 70 publications

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“…In addition, the presence of two or more crystalline phases also favors the photocatalytic performance due to the presence of numerous interphase defects. A similar effect was observed for nanoparticles, consisting of mixed TiO 2 phases [71][72][73][74]. The morphological (particle shape and size) and textural (specific surface area, pore sizes) features are also responsible for the better electron-hole diffusion, mass transportation, and improved activity of the plant-mediated ZnO powders.…”

Section: Samplesupporting

confidence: 57%

“…The plant extract yields plate-like morphology and well-defined mesoporous structure with the greatest share of mesopores in comparison with the reference sample. The larger number of mesopores ensures more active sites and facilitates the diffusion of large reactant molecules [74]. Microscopic observations have confirmed that application of MA leads to more effective particle separation, probably due to the presence of long-chain phytochemicals [76].…”

Section: Samplementioning

confidence: 82%

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Modified Approach Using Mentha arvensis in the Synthesis of ZnO Nanoparticles—Textural, Structural, and Photocatalytic Properties

et al. 2022

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Zinc oxide arouses considerable interest since it has many applications—in microelectronics, environmental decontaminations, biomedicine, photocatalysis, corrosion, etc. The present investigation describes the green synthesis of nanosized ZnO particles using a low-cost, ecologically friendly approach compared to the classical methods, which are aimed at limiting their harmful effects on the environment. In this study, ZnO nanoparticles were prepared using an extract of Mentha arvensis (MA) leaves as a stabilizing/reducing agent, followed by hydrothermal treatment at 180 °C. The resulting powder samples were characterized by X-ray diffraction (XRD) phase analysis, infrared spectroscopy (IRS), scanning electron microscopy (SEM), and electron paramagnetic resonance (EPR). The specific surface area and pore size distribution were measured by the Brunauer–Emmett–Taylor (BET) method. Electronic paramagnetic resonance spectra were recorded at room temperature and at 123 K by a JEOL JES-FA 100 EPR spectrometer. The intensity of the bands within the range of 400–1700 cm−1 for biosynthesized ZnO (BS-Zn) powders decreased with the increase in the Mentha arvensis extract concentration. Upon increasing the plant extract concentration, the relative proportion of mesopores in the BS-Zn samples also increased. It was established that the photocatalytic performance of the biosynthesized powders was dependent on the MA concentration in the precursor solution. According to EPR and PL analyses, it was proved that there was a presence of singly ionized oxygen vacancies (V0+) and zinc interstitials (Zni). The use of the plant extract led to changes in the morphology, phase composition, and structure of the ZnO particles, which were responsible for the increased photocatalytic rate of discoloration of Malachite Green dye.

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Section: Samplesupporting

confidence: 57%

Section: Samplementioning

confidence: 82%

Modified Approach Using Mentha arvensis in the Synthesis of ZnO Nanoparticles—Textural, Structural, and Photocatalytic Properties

et al. 2022

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“…6a), 62 indicating that TiO 2 remains unchanged even after the addition of As(III). In addition, the intensity of each peak decreased apparently in the presence of As(III) and As(V) 63 (Fig. 6b-e), indicating the formation of a new Ti-O-As bond.…”

Section: Rti(iv)-oh + Ho-as(oh) 2 -Rti(iv)-o-as(oh) 2 + H 2 O (7)mentioning

confidence: 95%

Importance of the ligand-to-metal charge transfer (LMCT) pathway in the photocatalytic oxidation of arsenite by TiO₂

Liu

Ren

et al. 2022

Phys. Chem. Chem. Phys.

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“…Some semiconductors like metal–organic framework (MOFs), g-C 3 N 4 , and slim band-gap oxide of metals families were used to expand the response spectrum of light until visible range 12 . The classic semiconductors like TiO 2 and ZnO activated via UV-C (under 300 nm wavelength that is only 4% of sunlight spectrum) 13 . Recently, a growing attraction in MOFs has focused on photocatalysis for the photo-driven removal of pollutants 14 .…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic-ozonation process in oxytetracycline degradation in aqueous solution: composite characterization, optimization, energy consumption, and by-products

Mehralipour

Darvishali

Bagheri

et al. 2023

Sci Rep

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In this research, we synthesized BiOI/NH2-MIL125(Ti) via solvo-thermal method to investigation of oxytetracycline (OTC) degradation in photocatalytic-ozonation process. The results of the XRD, FESEM, EDAX, FTIR, UV–Vis, TEM, XPS, and BET analyzes indicated that the catalyst BiOI/MOF was synthesized with excellent quality. Design of experiment (DOE), ANOVA statistical analysis, interaction of parameters and predicated optimum condition was done based on CCD. The effect of catalyst dose (0.25–0.5 mg/l), pH (4–8), reaction time (30–60 min) and O3 concentration (20–40 mN) at 10 mg/l of OTC on PCO/O3 process was optimized. Based on P-value and F-value coefficients (0.0001, 450.3 respectively) the model of OTC (F-value = 2451.04) and (P-value = 0.0001) coefficients, the model of COD removal was quadratic model. Under optimum condition pH 8.0, CD = 0.34 mg/l, RT = 56 min and O3 concentration = 28.7 mN, 96.2 and 77.2% of OTC and COD removed, respectively. The reduction of TOC was 64.2% in optimal conditions, which is less than the reduction of COD and OTC. The kinetics of reaction followed pseudo-first-order kinetic (R2 = 0.99). Synergistic effect coefficient was 1.31 that indicated ozonation, presence of catalyst and photolysis had a synergistic effect on OTC removal. The stability and reusability of the catalyst in six consecutive operating steps was acceptable and 7% efficiency decreased only. Cations (Mg2+, and Ca2+), SO42− had no influence on performing the process, but other anions, organic scavengers, and nitrogen gas, had an inhibitory effect. Finally, the OTC degradation probably pathway includes direct and indirect oxidation that decarboxylation, hydroxylation, demethylation and were the main mechanism in OTC degradation.

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Enhanced effect of combination of new hybrid TiO2 phase and phosphorus dopant on the physicochemical properties and UV/Visible light photocatalytic activity

Cited by 10 publications

References 70 publications

Modified Approach Using Mentha arvensis in the Synthesis of ZnO Nanoparticles—Textural, Structural, and Photocatalytic Properties

Modified Approach Using Mentha arvensis in the Synthesis of ZnO Nanoparticles—Textural, Structural, and Photocatalytic Properties

Importance of the ligand-to-metal charge transfer (LMCT) pathway in the photocatalytic oxidation of arsenite by TiO₂

Photocatalytic-ozonation process in oxytetracycline degradation in aqueous solution: composite characterization, optimization, energy consumption, and by-products

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Enhanced effect of combination of new hybrid TiO2 phase and phosphorus dopant on the physicochemical properties and UV/Visible light photocatalytic activity

Cited by 10 publications

References 70 publications

Modified Approach Using Mentha arvensis in the Synthesis of ZnO Nanoparticles—Textural, Structural, and Photocatalytic Properties

Modified Approach Using Mentha arvensis in the Synthesis of ZnO Nanoparticles—Textural, Structural, and Photocatalytic Properties

Importance of the ligand-to-metal charge transfer (LMCT) pathway in the photocatalytic oxidation of arsenite by TiO2

Photocatalytic-ozonation process in oxytetracycline degradation in aqueous solution: composite characterization, optimization, energy consumption, and by-products

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Importance of the ligand-to-metal charge transfer (LMCT) pathway in the photocatalytic oxidation of arsenite by TiO₂