Sol-Gel Preparation, Characterization and Photocatalytic Activity of Co Doped Nano-TiO2

Co doped TiO2 nanoparticles and thin films were prepared from Ti(OC4H9)4 by sol-gel method. The influence of Co-doping and its content on the crystallite structure and phase composition of TiO2 was systematically investigated by SEM and XRD, the precursor was analysed by TGA. The photocatalytic activity of nanocomposites was investigated in the photocatalytic degradation of methyl orange. The results indicated that the inhibitory effect of Co-doping on the phase transformation of TiO2 from anatase to rutile receded obviously when the calcination temperature was changed to 650°C from 550°C. Under the ultraviolet light radiation, the favourite Co-doping concentration was 1% and the obtained Co doped TiO2 thin films exhibited higher photocatalytic activity than nanoparticles and pure TiO2 in the photodegradation of methyl orange.

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Photo-activity and low resistivity in N/Nb Co-doped TiO2 thin films by combinatorial AACVD

Journal of Materials Chemistry A ◽

10.1039/c5ta07922e ◽

2016 ◽

Vol 4 (2) ◽

pp. 407-415 ◽

Cited By ~ 14

Author(s):

Nicholas P. Chadwick ◽

Emily N. K. Glover ◽

Sanjayan Sathasivam ◽

Sulaiman N. Basahel ◽

Shaeel A. Althabaiti ◽

...

Keyword(s):

Thin Films ◽

Functional Properties ◽

Tio2 Thin Films ◽

Doped Tio2 ◽

Low Resistivity ◽

Co Doping ◽

Co Doped

Combinatorial AACVD has achieved the production of various niobium/nitrogen co-doped TiO2 materials in a single film. The co-doping concentrations have been correlated with functional properties.

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PENGARUH PENAMBAHAN CO-DOPING Mg/La TERHADAP KARAKTERISASI TiO2 SEBAGAI FOTOELEKTRODA

Jurnal Teori dan Aplikasi Fisika ◽

10.23960/jtaf.v9i1.2633 ◽

2021 ◽

Vol 9 (1) ◽

pp. 79-86

Author(s):

Mursal Mursal ◽

◽

Nurul Azmi ◽

Ismail Ismail ◽

◽

...

Keyword(s):

Doping Concentration ◽

Crystal Size ◽

Energy Gap ◽

Dopant Concentration ◽

Sol Gel ◽

Pure Tio2 ◽

Tio2 Sample ◽

Doped Tio2 ◽

Co Doping ◽

Co Doped

The effect of Mg/La co-doping addition on the caracteristics of TiO2 as photoelectrode have been studied. This study aims to investigate the effect of Mg/La co-doping concentration on the characteristics of TiO2. This study aims investigate the effect of Mg/La co-doping concentration on the characteristics of TiO2. Mg/La was varied from 0% mol, 0.4 / 0.6% mol, and 0.6 / 0.4% mol. Synthesis of TiO2 co-doping Mg/La was done by sol gel method. The resulting of powder pure TiO2 and co-doping Mg/La was made to paste, and was deposited on a glass substrate with a size of 2.5 x 2.5 cm and sintered at 600°C for 1 hour. Mg / La co-doped TiO2 layers were characterized using XRD, UV-Vis, and FTIR spectrometers. The results showed that TiO2 was the mos dominan phase appeared in pure TiO2 sample. The phase of MgO, MgTiO3, Mg2TiO4, and La2O3 were found in Mg/La co-doped TiO2 samples. The crystal size of Mg/La co-doped TiO2 was varied from 8.85 to 7.70 nm. In this research, we obtained that the energy gap was varied from 3.52 to 3.5 eV depent on co-dopant concentration. FTIR measurement showed groups of Ti-O, Ti-O-Ti, Ti-O-O, and H-O.

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Synthesis of Fe- and Co-Doped TiO2 with Improved Photocatalytic Activity Under Visible Irradiation Toward Carbamazepine Degradation

Materials ◽

10.3390/ma12233874 ◽

2019 ◽

Vol 12 (23) ◽

pp. 3874 ◽

Cited By ~ 15

Author(s):

Abderrahim El Mragui ◽

Yuliya Logvina ◽

Luís Pinto da Silva ◽

Omar Zegaoui ◽

Joaquim C.G. Esteves da Silva

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Diffuse Reflectance Spectroscopy ◽

Anatase Phase ◽

Aqueous Suspension ◽

Sol Gel ◽

Pure Tio2 ◽

Doped Tio2 ◽

Doped Titania ◽

Co Doped

Pure TiO2 and Fe- and Co-doped TiO2 nanoparticles (NPs) as photocatalysts were synthesized using wet chemical methods (sol-gel + precipitation). Their crystalline structure and optical properties were analyzed using X-ray diffraction (XRD), Raman spectroscopy and Fourier-transform infrared (FTIR) spectroscopy, ultraviolet-visible light (UV-Vis) diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The photocatalytic activity of the synthesized nanoparticles was evaluated through degradation of carbamazepine (CBZ) under UV-A and visible-light irradiations. The XRD and Raman analyses revealed that all synthesized nanomaterials showed only the anatase phase. The DRS results showed that the absorption edge was blue-shifted for Fe-doped TiO2 NPs. The decrease in charge recombination was evidenced from the PL investigation for both Co-doped and Fe-doped TiO2 nanomaterials. An enhancement in photocatalytic degradation of carbamazepine in aqueous suspension under both UV-A light and visible-light irradiations was observed for Fe-doped Titania NPs by comparison with pure TiO2. These results suggest that the doping cations could suppress the electron/hole recombination. Therefore, the photocatalytic activity of TiO2-based nanomaterials was enhanced.

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Structural, optical properties and photocatalytic activity of Fe3+ doped TiO2 thin films deposited by sol-gel spin coating

Surfaces and Interfaces ◽

10.1016/j.surfin.2019.100368 ◽

2019 ◽

Vol 17 ◽

pp. 100368 ◽

Cited By ~ 7

Author(s):

Durgam Komaraiah ◽

Eppa Radha ◽

J. Sivakumar ◽

M.V. Ramana Reddy ◽

R. Sayanna

Keyword(s):

Thin Films ◽

Optical Properties ◽

Photocatalytic Activity ◽

Spin Coating ◽

Sol Gel ◽

Tio2 Thin Films ◽

Doped Tio2

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Photocurrent response and photocatalytic activity of Nd-doped TiO2 thin films prepared by sol-gel method

Journal of Advanced Oxidation Technologies ◽

10.1515/jaots-2016-0190 ◽

2017 ◽

Vol 20 (1) ◽

Cited By ~ 1

Author(s):

Xiaodong Zhu ◽

Huijin Song ◽

Wei Feng ◽

Guilan Wen ◽

Haoyu Li ◽

...

Keyword(s):

Thin Films ◽

Photocatalytic Activity ◽

Sol Gel ◽

Photocurrent Response ◽

Tio2 Thin Films ◽

Gel Method ◽

Doped Tio2 ◽

Sol Gel Method

AbstractThe undoped and Nd-doped TiO

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Cerium and Europium doped TiO2 thin films deposited by a sol-gel dip-coating process: Characterization and photocatalytic activity toward dye degradation

TURKISH JOURNAL OF CHEMISTRY ◽

10.3906/kim-2106-55 ◽

2021 ◽

Keyword(s):

Thin Films ◽

Photocatalytic Activity ◽

Dye Degradation ◽

Sol Gel ◽

Dip Coating ◽

Coating Process ◽

Tio2 Thin Films ◽

Doped Tio2 ◽

Process Characterization

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Effects of Mineral Tourmaline Particles on the Photocatalytic Activity of TiO2 Thin Films

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2008.18183 ◽

2008 ◽

Vol 8 (3) ◽

pp. 1279-1283 ◽

Cited By ~ 3

Author(s):

Junping Meng ◽

Jinsheng Liang ◽

Xiuqin Ou ◽

Yan Ding ◽

Guangchuan Liang

Keyword(s):

Thin Films ◽

Photocatalytic Activity ◽

Methyl Orange ◽

Sol Gel ◽

Far Infrared ◽

Infrared Emission ◽

Order Kinetic ◽

Tio2 Thin Films ◽

Composite Thin Films ◽

Heat Treated

Titania composite thin films (T/TiO2) containing tourmaline particles were prepared by a sol–gel method, using alkoxide solutions as precursor. The tourmaline particles and thin films were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and so on. The effects of tourmaline on the photocatalytic activity of TiO2 were measured with methyl orange as an objective photodegradation substance. The results showed that the photocatalytic degradation of methyl orange conformed to the first-order kinetic equation and the composite thin films had better photocatalytic activity due to the cooperation of polarity and the far infrared emission of tourmaline. The T/TiO2 thin films including 0.5 wt% tourmaline exhibited better photocatalytic activity when heat-treated at 250 °C for 3 h, than pure TiO2 thin films under the ultraviolet irradiation.

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Preparation and Photocatalytic Properties of Nanosized La3+ and Co2+ Co-Doped TiO2 by Microemulsions

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.1943 ◽

2007 ◽

Vol 336-338 ◽

pp. 1943-1945

Author(s):

Wei Liang Liu ◽

Dan Li Lu ◽

Chang Chun Ge ◽

Jian Hua Chen ◽

Zhi Ping He

Keyword(s):

Photocatalytic Activity ◽

Methyl Orange ◽

Visible Light ◽

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Uv Light ◽

Pure Tio2 ◽

Doped Tio2 ◽

Co Doped

La3+ and Co2+ co-doped titania nanoparticles were prepared from reacting TiOSO4, La(NO3)3 and Co(NO3)2 with NH4OH in water/Triton X-100/n-hexanol/cyclohexane microemulsions. The structure, surface morphology and the specific surface area of the samples were characterized. The photocatalytic efficiency of as-prepared TiO2 was tested by photodegrading methyl orange. The results showed that doping with La3+ and Co2+ could suppress the growth of TiO2 grains and increase the specific surface area; When the calcination temperature increased from 300°C to 900°C, the average crystallite size of the particles increased from 7.3nm to 35.6 nm andthe specific surface area of the particles decreased rapidly from 205.5m2/g to 41.2m2/g. The synthesized amorphous particles wer transformed into anatase phase at 300°C, and further into rutile phase at 900°C. UV-Vis diffuse reflectance spectrum revealed that La3+ and Co2+ co-doped TiO2 absorbed UV light and visible light, while pure TiO2 could only absorb UV light. In the experiments of photodegrading methyl orange, it was proved that La3+ and Co2+ co-doped TiO2 had high photocatalytic activity under UV light and visible light, while pure TiO2 showed photocatalytic activity just under UV light.

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