Photocatalytic activity of SnO2-TiO2 composite nanoparticles modified with PVP

Toloman, Dana; Panâ, O.; Ştefan, Maria; Popa, Adriana; Leoștean, Cristian; Macavei, Sergiu; Silipas, D. T.; Perhaița, I.; Lazăr, Mihaela D.; Barbu–Tudoran, Lucian

doi:10.1016/j.jcis.2019.02.026

Cited by 77 publications

(18 citation statements)

References 38 publications

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“…In the XPS spectra of Sn 3d for all nanocomposites (Figure S2), two peaks were also present that correspond to the binding energy at approximately 495 eV and 486 eV and are characteristic for Sn 3d 3/2 and Sn 3d 5/2, respectively [48][49][50]. XPS spectra of O 1s (Figure S3) for P25TiO 2 -SnO 2 and s2TiO 2 -SnO 2 composites are characterized by peaks at 530 eV, 530.5 eV, and 535.5 eV that correspond to oxygen bound in TiO 2 and SnO 2 and in the form of surface hydroxyl oxygen (OH), respectively [51][52][53]. s1TiO 2 -SnO 2 nanocomposite is characterized by similar peaks except the one corresponding to hydroxyl oxygen.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Photocatalytic Activity of TiO₂/SnO₂ Binary Nanocomposites

Dontsova

Kutuzova

Bila

et al. 2020

Journal of Nanomaterials

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The paper presents the results of characterization and study of adsorption-photocatalytic properties of commercial and synthesized-by-hydrothermal method TiO2 and TiO2-SnO2 nanocomposites. Hydrothermal synthesis of TiO2-based nanocomposites was performed in two ways: single-stage and two-stage methods. Characterization was carried out by XRD, X-ray fluorescence method, XPS, EPR, PL, and low-temperature adsorption-desorption of nitrogen, which showed that TiO2-SnO2 nanostructured composites were obtained with tin(IV) oxide content of 10 wt.% and had acidic surface and different porous structures. Besides, modification of a commercial sample with tin(IV) oxide led to a slight decrease in the specific surface area, while modification of a synthesized-by-hydrothermal method TiO2 sample led to an increase. It was found that sorption properties of the obtained nanocomposites and pure TiO2 are better towards anionic dyes. Photocatalytic activity, on the contrary, is higher towards cationic dyes, which is consistent with additional studies on the destruction of these dyes. It was established that in terms of photocatalytic activity, TiO2-SnO2 nanocomposites are more promising than solid solutions, and modification of TiO2 with tin(IV) oxide, in general, leads to improvement of its photocatalytic activity.

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Section: Resultsmentioning

confidence: 99%

Enhanced Photocatalytic Activity of TiO₂/SnO₂ Binary Nanocomposites

Dontsova

Kutuzova

Bila

et al. 2020

Journal of Nanomaterials

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“…5b). This means that Sn 4+ was also present in the annealed TiO 2 film, since the positions of the characteristic peaks for Sn 2+ were at significantly lower energies (484.7 eV for 3d 5/2 ) [31]. It should be noted that for the as-anodized sample, the content of Sn was at the detection level limit, corresponding to 0.03 at.%, and peaks with BE of 486.83 and 495.32 eV were very close to those of FTO positions.…”

Section: Figmentioning

confidence: 99%

Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye

Bjelajac

Petrović

Vujančević

et al. 2020

Journal of Physics and Chemistry of Solids

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“…由 Ti 2p 高分辨谱图可以看到属于 Ti 2p 1/2 和 Ti 2p 3/2 的两个特征峰, 分别位于 464.43 eV 和 458.74 eV, 两个特征峰的差值为 5.69 eV, 说明 Ti 主要以 Ti 4 ＋的形式存在 [21] . [22] , 另一种是归属于 SnO 2 的(110)晶面 [23] [24][25] . 利用 Tauc 方程计算了样品的带隙宽度 [26] : (αhυ) 0.5 ＝k(hν-Eg)…”

Section: 引言unclassified

Preparation and Photocatalytic Performance of B,N-SnO₂/TiO₂ Photocatalyst

Ma¹,

Li²,

Wu³

et al. 2021

Acta Chimica Sinica

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In order to improve the photocatalytic activity of TiO2 under visible light, B,N-codoped SnO2/TiO2 (B,N-SnO2/TiO2) powder photocatalysts were prepared by polymer precursor method, and to further improve the practicability of B,N-SnO2/TiO2 photocatalyst, alumina fabrics immobilized B,N-SnO2/TiO2 catalyst was prepared by precursor impregnation and pyrolysis method. The typical experimental procedure for synthesis of B,N-SnO2/TiO2 powder photocatalysts is as follows: First, tetrapropylorthotitanate (TNPT) was mixed with PEG-600 and Sn(OPr)4 under magnetic stirring and refluxed for 2 h. Then boric acid was added. Acetamide and acetylacetone were added to the system after boric acid was dissolved completely. Finally, a mixture of deionized water and n-propanol were added dropwise. The whole solution were reflux for 1 h and then the B,N-SnO2/TiO2 precursor was obtained by rotary evaporation method. The precursor was placed in a quartz tube furnace and calcined at a heating rate of 3 ℃/min to 450 ℃ for 30 min to obtain B,N-SnO2/TiO2 powder type photocatalyst. Supported photocatalysts was prepared as follows: The precursor solution of B,N-SnO2/TiO2 was diluted with n-propanol and heated at 100 ℃ for 1 h. The alumina fabrics was immersed in the loaded solution and heated at 100 ℃ for 1 h. Then the precursor immersed fabrics was dried by rotary evaporation method. Supported photocatalysts were obtained by calcining the dried fabrics at 450 ℃ for 30 min in air atmosphere. The catalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), high-resolution transmission electron microscope (HRTEM), X-ray photoelectron spectroscopy (XPS) and UV-Vis diffuse reflectance spectra (UV-DRS). B,N-SnO2/TiO2 powder photocatalysts were predominantly homogeneous anatase phase. The introduction of boron inhibited the growth of anatase phase crystal, and the grain size was 15 nm, showing a stacking structure. The results of HRTEM and energy dispersive spectrometer (EDS) showed that SnO2 and TiO2 constructed heterostructure, and the doped elements existed and distributed evenly. Boron and nitrogen co-doping and heterojunction structure effectively improved the separation ability of photogenerated carriers. The photocatalytic activities of B,N-SnO2/TiO2 powder photocatalysts were investigated using ofloxacin solution as simulated pollutant. The results indicated that the degradation ratio of ofloxacin reached 98.3% in 15 min under visible light. The B,N-SnO2/TiO2-loaded Al2O3 fabrics also showed excellent photocatalytic performance, with a thickness of about 100 nm powder photocatalysts on the surface of Al2O3 fabrics, and the heterostructure still existed. The results showed that the degradation rate of ofloxacin was 68.7% under visible light irradiation for 120 min, and the photocatalytic performance was almost unchanged after repeated use for 21 times.

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Photocatalytic activity of SnO2-TiO2 composite nanoparticles modified with PVP

Cited by 77 publications

References 38 publications

Enhanced Photocatalytic Activity of TiO₂/SnO₂ Binary Nanocomposites

Enhanced Photocatalytic Activity of TiO₂/SnO₂ Binary Nanocomposites

Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye

Preparation and Photocatalytic Performance of B,N-SnO₂/TiO₂ Photocatalyst

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Photocatalytic activity of SnO2-TiO2 composite nanoparticles modified with PVP

Cited by 77 publications

References 38 publications

Enhanced Photocatalytic Activity of TiO2/SnO2 Binary Nanocomposites

Enhanced Photocatalytic Activity of TiO2/SnO2 Binary Nanocomposites

Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye

Preparation and Photocatalytic Performance of B,N-SnO2/TiO2 Photocatalyst

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Enhanced Photocatalytic Activity of TiO₂/SnO₂ Binary Nanocomposites

Enhanced Photocatalytic Activity of TiO₂/SnO₂ Binary Nanocomposites

Preparation and Photocatalytic Performance of B,N-SnO₂/TiO₂ Photocatalyst