Synthesis, Characterization and Photocatalytic Properties of TiO2-SnO2 Composite Nanoparticles

Pure TiO2 nanoparticles were synthesized using Titanium (IV)-n-butoxide as Titanium precursor and Sn doping was performed by adding Tin (II) ethylhexanate (Sn precursor) in Titanium precursor by Sol-gel method. The morphology of nanoparticles was examined by XRD and SEM analysis. The XRD analysis shows the formation of mixture phases (anatase and brookite) for pure TiO2. Addition of lower Sn precursor concentration resulted in the formation of Sn doped TiO2 nanoparticles. On increasing the Sn precursor favours the growth of TiO2-SnO2 nanocomposites. It is interesting to observe the fraction of brookite phase in TiO2 decreases by increasing the Sn precursor concentration. The photocatalytic activity test for pure TiO2, pure SnO2, Sn doped TiO2 nanoparticles and TiO2-SnO2 nanocomposites were carried out for Methylene blue (MB) solution. Both Sn doped TiO2 nanoparticles and TiO2-SnO2 nanocomposites show faster photocatalytic degradation than pure TiO2 nanoparticles due to suppression of brookite phase by addition of Sn precursor.

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Green Synthesis of N/Zr Co-Doped TiO2 for Photocatalytic Degradation of p-Nitrophenol in Wastewater

Catalysts ◽

10.3390/catal11020235 ◽

2021 ◽

Vol 11 (2) ◽

pp. 235

Author(s):

Hayette Benkhennouche-Bouchene ◽

Julien G. Mahy ◽

Cédric Wolfs ◽

Bénédicte Vertruyen ◽

Dirk Poelman ◽

...

Keyword(s):

Visible Light ◽

Tio2 Nanoparticles ◽

Sol Gel ◽

Visible Region ◽

Chemical Properties ◽

Pure Tio2 ◽

Molar Ratio ◽

Xps Spectra ◽

Doped Tio2 ◽

Co Doped

TiO2 prepared by a green aqueous sol–gel peptization process is co-doped with nitrogen and zirconium to improve and extend its photoactivity to the visible region. Two nitrogen precursors are used: urea and triethylamine; zirconium (IV) tert-butoxide is added as a source of zirconia. The N/Ti molar ratio is fixed regardless of the chosen nitrogen precursor while the quantity of zirconia is set to 0.7, 1.4, 2, or 2.8 mol%. The performance and physico-chemical properties of these materials are compared with the commercial Evonik P25 photocatalyst. For all doped and co-doped samples, TiO2 nanoparticles of 4 to 8 nm of size are formed of anatase-brookite phases, with a specific surface area between 125 and 280 m2 g−1 vs. 50 m2 g−1 for the commercial P25 photocatalyst. X-ray photoelectron (XPS) measurements show that nitrogen is incorporated into the TiO2 materials through Ti-O-N bonds allowing light absorption in the visible region. The XPS spectra of the Zr-(co)doped powders show the presence of TiO2-ZrO2 mixed oxide materials. Under visible light, the best co-doped sample gives a degradation of p-nitrophenol (PNP) equal to 70% instead of 25% with pure TiO2 and 10% with P25 under the same conditions. Similarly, the photocatalytic activity improved under UV/visible reaching 95% with the best sample compared to 50% with pure TiO2. This study suggests that N/Zr co-doped TiO2 nanoparticles can be produced in a safe and energy-efficient way while being markedly more active than state-of-the-art photocatalytic materials under visible light.

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Boron-Doped TiO2-CNT Nanocomposites with Improved Photocatalytic Efficiency toward Photodegradation of Toluene Gas and Photo-Inactivation of Escherichia coli

Catalysts ◽

10.3390/catal10060632 ◽

2020 ◽

Vol 10 (6) ◽

pp. 632 ◽

Cited By ~ 1

Author(s):

Valmiki B. Koli ◽

Shyue-Chu Ke ◽

Ananta G. Dodamani ◽

Shamkumar P. Deshmukh ◽

Jung-Sik Kim

Keyword(s):

Tio2 Nanoparticles ◽

Sol Gel ◽

Photo Luminescence ◽

Pure Tio2 ◽

Electron Hole ◽

Doped Tio2 ◽

E Coli ◽

Boron Doped ◽

Electron Hole Pair

An in-situ sol-gel method was used for the synthesis of boron-doped TiO2-CNT nanocomposites with varied boron concentrations from 1 to 4 mol%. The synthesized nanocomposites were characterized by various techniques, namely XRD, UV-DRS, TEM, PL, and XPS; all results show that 3 mol% B-TiO2-CNT nanocomposites have superior properties to pure TiO2, 3B-TiO2 nanoparticles, and other nanocomposites. TEM images clearly show the B-TiO2 nanoparticles decorated on the CNT surface. Photo-luminescence studies confirm that boron doping of up to 3 mol% in TiO2-CNT nanocomposites reduces the electron-hole pair recombination rate. The photocatalytic performance of the B-TiO2-CNT nanocomposites was tested against the photodegradation of toluene gas and the photocatalytic inactivation of E. coli in the presence of UV and visible light respectively. B-TiO2-CNT (3 mol%) nanocomposites show the highest photocatalytic activity.

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PREPARATION AND FERROELECTRIC PROPERTY OF (100)-ORIENTED Ca0.4Sr0.6Bi4Ti4O15 THIN FILM ON Pt/Ti/SiO2/Si SUBSTRATE

Surface Review and Letters ◽

10.1142/s0218625x10014351 ◽

2010 ◽

Vol 17 (05n06) ◽

pp. 445-449 ◽

Cited By ~ 1

Author(s):

SUHUA FAN ◽

QUANDE CHE ◽

FENGQING ZHANG

Keyword(s):

Thin Film ◽

Thin Films ◽

Ferroelectric Property ◽

Remanent Polarization ◽

Sol Gel ◽

Xrd Analysis ◽

Sem Analysis ◽

Si Substrate ◽

Degree Of Orientation ◽

Equiaxed Grains

The (100)-oriented Ca0.4Sr0.6Bi4Ti4O15(C0.4S0.6BTi ) thin film was successfully prepared by a sol-gel method on Pt/Ti/SiO2/Si substrate. The orientation and formation of thin films under different annealing schedules were studied using XRD and SEM. XRD analysis indicated that (100)-oriented C0.4S0.6BTi thin film with degree of orientation of I(200)/I(119) = 1.60 was prepared by preannealing the film at 400°C for 3 min followed by rapid thermal annealing at 800°C for 5 min. SEM analysis further indicated that the (100)-oriented C0.4S0.6BTi thin film with a thickness of about 800 nm was mainly composed of equiaxed grains. The remanent polarization and coercive field of the film were 16.1 μC/cm2 and 85 kV/cm, respectively.

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Synthesis, Structural, Morphological and Optical Characterization of TiO2 and Nd3+ Doped TiO2 Nanoparticles by Sol Gel Method: A Comparative Study for Photovoltaic Application

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/360/1/012011 ◽

2018 ◽

Vol 360 ◽

pp. 012011 ◽

Cited By ~ 1

Author(s):

P Sanjay ◽

E Chinnasamy ◽

K Deepa ◽

J Madhavan ◽

S Senthil

Keyword(s):

Comparative Study ◽

Tio2 Nanoparticles ◽

Sol Gel ◽

Optical Characterization ◽

Gel Method ◽

Doped Tio2 ◽

Sol Gel Method ◽

Photovoltaic Application

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Effect of Re and Tm-site on morphology structure and optical band gap of ReTmO3 (Re: La, Ce, Nd, Gd, Dy, Y and Tm: Fe, Cr) prepared by sol-gel method

Revista Mexicana de Física ◽

10.31349/revmexfis.64.381 ◽

2018 ◽

Vol 64 (4) ◽

pp. 381

Author(s):

Muhammad Tufiq Jamil ◽

Javed Ahmad ◽

Syed Hamad Bukhari ◽

Murtaza Saleem

Keyword(s):

Band Gap ◽

Sol Gel ◽

Xrd Analysis ◽

Sem Analysis ◽

X Ray Diffraction ◽

Orthorhombic Crystal ◽

X Ray ◽

Average Grain Size ◽

Auto Combustion ◽

Uv Visible

Rare earth nano sized pollycrystalline orthoferrites and orthocromites ReT mO3 (Re = La, Nd, Gd, Dy, Y and T m = Fe, Cr) have been synthesized by sol-gel auto combustion citrate method. The samples have been characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), and UV-visible spectroscopy. The samples are single phase as confirmed by XRD analysis and correspond to the orthorhombic crystal symmetry with space group pbnm. Debye Scherer formula and Williamson Hall analysis have been used to calculate the average grain size which is consistent with that of determined from SEM analysis and varied between 25-75 nm. The elemental compositions of all samples have been checked by EDX analysis. Different crystallographic parameters are calculated with strong structural correlation among Re and Tm sites. The optical energy band gap has been calculated by using Tauc relation estimated to be in the range of 1.77 - 1.87 eV and 2.77 - 3.14 eV, for ReFeO3 and ReCrO3, respectively.

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Facile Electrospinning Preparation of Y3Al5O12 Nanobelts

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.3041 ◽

2013 ◽

Vol 448-453 ◽

pp. 3041-3045

Author(s):

Fei Bi ◽

Xiang Ting Dong ◽

Jin Xian Wang ◽

Gui Xia Liu ◽

Wen Sheng Yu

Keyword(s):

Sol Gel ◽

Xrd Analysis ◽

Sem Analysis ◽

Ftir Analysis ◽

X Ray ◽

Novel Structure ◽

Group I ◽

Sol Gel Process ◽

Composite Nanobelts ◽

Scanning Electron

PVP/[Y(NO3)3+Al (NO3)3] composite nanobelts were fabricated via electrospinning combined with sol-gel process and novel structure of Y3Al5O12(denoted as YAG for short) nanobelts have been obtained after calcination of the relevant composite nanobelts. The structural properties were characterized by X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). XRD analysis indicated that the composite nanobelts were amorphous, and YAG nanobelts were cubic in structure with space group Ia3d. FTIR analysis manifested that pure YAG nanobelts were formed at 900oC. SEM analysis and histograms revealed that the width of the composite nanobelts and YAG nanobelts were 3.5 μm and 2.4 μm, and the thickness were 240 nm and 112 nm, respectively, under the 95% confidence level. The formation mechanism of YAG nanobelts was discussed in detail.

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