Enhanced Photocatalytic Activities of Ta2O5 and Nitrogen Co-Doped TiO2 under Visible Light Irradiation

2007 ◽  
Vol 544-545 ◽  
pp. 59-62
Author(s):  
Yan Fang Shen ◽  
Tian Ying Xiong ◽  
Ke Yang
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Raw Materials ◽  
High Energy ◽  
Light Irradiation ◽  
Doped Tio2 ◽  
Photocatalytic Activities ◽  
Degussa P25 ◽  
Energy Ball ◽  
Co Doped

Tantalum dioxide and nitrogen co-doped titanium dioxide nanopowders, denoted as (Ta2O5, N) co-doped TiO2, were fabricated by a high-energy ball miller using TiO2, Ta2O5 and urea as raw materials. Experiments on the photocatalytic activities of the (Ta2O5, N) co-doped TiO2 were carried out in the form of photodegradation of methylene blue (MB) in aqueous solution under visible light irradiation. Enhanced photocatalytic activities were observed for the (Ta2O5, N) co-doped TiO2 than commercial Degussa P25. Besides, physical, chemical and optical properties, including XRD, DRS, and XPS were detected to analyze the origins for the enhanced photocatalytic activities of the prepared samples.

scholarly journals Enhanced Photocatalytic Properties of PET Filaments Coated with Ag-N Co-Doped TiO2 Nanoparticles Sensitized with Disperse Blue Dyes

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 987 ◽  
Author(s):  
Hui Zhang ◽  
Qi Tang ◽  
Qingshan Li ◽  
Qingwen Song ◽  
Hailiang Wu ◽  
...  
Keyword(s):  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Visible Light Irradiation ◽  
Reaction Rate Constant ◽  
Light Irradiation ◽  
Photocatalytic Properties ◽  
Blue Dye ◽  
Dye Sensitization ◽  
Doped Tio2 ◽  
Co Doped

In this study, the effects of disperse blue dye-sensitization on the photocatalytic properties of the Ag-N co-doped TiO2 nanoparticles loaded on polyethylene terephthalate (PET) filaments are investigated under visible light irradiation. The microstructure and photocatalytic properties of the as-synthesized TiO2 nanocomposites, as well as the as-prepared PET filaments, are systematically characterized. The photocatalytic performance of the PET filaments coated with the Ag-N co-doped TiO2 nanoparticles sensitized with disperse blue dyes is evaluated via its capacity of photo-degrading methyl orange (MO) dyes under visible light irradiation. It is found that the holes are the predominant reactive radical species and the hydroxyl and superoxide radicals play a subordinate role in the photocatalytic reaction process. The reaction rate constant of the photocatalytic composite filaments is nearly 4.0 times higher than that of the PET filaments loaded solely with TiO2 nanoparticles. The resultant photocatalytic composite filaments are evident to be capable of repeatedly photo-degrading MO dyes without losing its photocatalytic activity significantly.

A new nano-photocatalyst based on Pt and Bi co-doped TiO2 for efficient visible-light photo degradation of amoxicillin

2019 ◽  
Vol 43 (3) ◽  
pp. 1562-1568 ◽  
Author(s):  
Maryam Salimi ◽  
Mohammad Behbahani ◽  
Hamid Reza Sobhi ◽  
Mitra Gholami ◽  
Ahmad Jonidi Jafari ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Photo Degradation ◽  
Doped Tio2 ◽  
Co Doped

Herein, the photo degradation of amoxicillin (AMX) was thoroughly investigated using Pt and Bi co-doped TiO2 photocatalysts under visible-light irradiation.

A systemic study on Gd, Fe and N co-doped TiO2 nanomaterials for enhanced photocatalytic activity under visible light irradiation

2020 ◽  
Vol 46 (15) ◽  
pp. 24744-24752 ◽  
Author(s):  
Weichao Li ◽  
Linkun Xie ◽  
Liexing Zhou ◽  
Josias Ochoa-Lozano ◽  
Chen Li ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Doped Tio2 ◽  
Tio2 Nanomaterials ◽  
Co Doped

scholarly journals Synthesis of C,N,S-tridoped TiO2 distribute onto silicone for photocatalytic on degradation of tetracycline under visible light irradiation

2021 ◽  
Vol 10 (1) ◽  
pp. 1-7
Author(s):  
Thuy Le Thi Thanh ◽  
Tung Huynh Thanh ◽  
Hung Nguyen Phi
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Optimum Dose ◽  
Titanyl Sulfate ◽  
Isothermal Adsorption ◽  
Photocatalytic Ability ◽  
Doped Tio2 ◽  
X Ray ◽  
Co Doped

Using carbon, nitrogen, and sulfur sourced from thiourea to co-doped TiO2 (C,N,S-TiO2), was prepared via hydrothermal method using precursors of titanyl sulfate TiOSO4, obtained by decomposition of ilmenite ore in Binh Dinh. The material used to make the substrate is glass and distributed onto it is silicone and photocatalytic. The structure and properties of materials system were investigated by modern physicochemical analysis methods including scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, diffuse reflection spectroscopy UV-Vis, transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and nitrogen isothermal adsorption. The photocatalytic ability of materials system after being carried by silicone is demonstrated by decomposing tetracycline (10 mg/L) in aqueous solution with the yield more than 88% efficiency after 6 hours under visible light irradiation. The optimum dose of the photocatalyst was 0.6 g/L under visible light irradiation. The results indicated that C, N, S co-doped TiO2 demonstrated the highest photocatalytic efficiency and a perspective recyclable potential when it is distributed onto silicone.

scholarly journals Sol-Gel Synthesized N and MN Co-Doped Tio2 Nanomaterial for Photocatalytic Degradation of Malathion under Visible Light Irradiation

2019 ◽  
Vol 9 (2) ◽  
pp. 3688-3694
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Light Irradiation ◽  
Average Particle ◽  
Doped Tio2 ◽  
Sem And Tem ◽  
Ft Ir ◽  
Co Doped

Different weight percentages (0.25-1.00 wt%) of Nitrogen (Non-Metal) and Manganese (Metal) co-doped nano titania were synthesized by sol-gel method and characterized by XRD, UV-vis.DRS, FT-IR, XPS, SEM and TEM. The XRD results has shown that all the prepared catalysts are in anatase phase indicating that co-doping of N and Mn did not affect the crystal structure of TiO2 . From the UV-vis.DRS spectra a significant absorption shift towards visible region was noticed in N and Mn co-doped TiO2 and their presence was confirmed by XPS and FT-IR results. SEM and TEM results showed spherical nanoparticles with average particle size of 9 nm. Photocatalytic efficiency of synthesized nano materials was tested on non-biodegradable organophosphorous pesticide, Malathion under visible light irradiation. The effect of dopant concentration, pH, catalyst dosage, and initial pesticide concentration on photocatalytic degradation of malathion was studied and optimum conditions were established. Among the synthesized samples 0.50 wt% N & 1.00 wt% Mn-TiO2 exhibited best photocatalytic performance. Photoluminiscent spectroscopy (PL) was used to examine the rate of production of oxidative species, hydroxyl radicals which play key role in photocatalytic degradation.

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