scholarly journals Effect of iron doped titanium oxide encapsulated in alginate on photocatalytic activity for the removal of dye pollutants

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22311-22317 ◽  
Author(s):  
Soulaima Chkirida ◽  
Nadia Zari ◽  
Redouane Achour ◽  
Abou el kacem Qaiss ◽  
Rachid Bouhfid
Keyword(s):  
Photocatalytic Activity ◽  
Iron Oxide ◽  
Visible Light ◽  
Titanium Oxide ◽  
Organic Pollutants ◽  
Uv Irradiation ◽  
Dye Pollutants ◽  
Iron Doped

Iron oxide/titania oxide are encapsulated in alginate biopolymer. These bio-nanocomposites are suitable for the photodegradation of dissimilar organic pollutants under UV irradiation as well as visible light.

Morphology-controlled synthesis of Ti3+ self-doped yolk–shell structure titanium oxide with superior photocatalytic activity under visible light

2014 ◽  
Vol 213 ◽  
pp. 98-103 ◽  
Author(s):  
Shixiong Wang ◽  
Xiangjun Yang ◽  
Yapeng Wang ◽  
Lixiang Liu ◽  
Yuanyuan Guo ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Titanium Oxide ◽  
Shell Structure ◽  
Controlled Synthesis

Facile synthesis of CdS/Bi4V2O11 photocatalysts with enhanced visible-light photocatalytic activity for degradation of organic pollutants in water

2017 ◽  
Vol 46 (37) ◽  
pp. 12675-12682 ◽  
Author(s):  
Taotao Lv ◽  
Di Li ◽  
Yuanzhi Hong ◽  
Bifu Luo ◽  
Dongbo Xu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Pollutants ◽  
Pollutant Degradation ◽  
Facile Synthesis ◽  
Visible Light Photocatalytic Activity ◽  
Promising Strategy ◽  
Visible Light Photocatalytic

The development of Z-scheme heterojunction photocatalytic systems is a promising strategy to produce hydrogen and for pollutant degradation.

scholarly journals Photocatalytic Degradation of Estriol Using Iron-Doped TiO2 under High and Low UV-Irradiation

2018 ◽  
Author(s):  
Irwing M. Ramírez-Sánchez ◽  
Erick R. Bandala
Keyword(s):  
Photocatalytic Activity ◽  
Electron Microscope ◽  
Uv Irradiation ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Bet Surface Area ◽  
Doped Tio2 ◽  
X Ray ◽  
Transmission Electron ◽  
Iron Doped

Iron Doped TiO2 nanoparticles (Fe-TiO2) were synthesized and photocatalitically investigated under high and low fluence values of UV-radiation. The Fe-TiO2 physical characterization was performed using X-ray Powder Diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis, Transmission Electron Microscope (TEM), Scanning Electron Microscope (SEM), Diffuse Reflectance Spectroscopy (DRS), and X-Ray Photoelectron Spectroscopy (XPS) technique. The XPS evidenced that ferric ion (Fe3+) was in the lattice of TiO2 and co-dopants no intentionally added were also present due to the precursors of the synthetic method. The Fe3+ concentration played a key role in the photocatalytic generation of hydroxyl radical (•OH) and estriol (E3) degradation. Fe-TiO2 materials accomplished E3 degradation, and it was found that the catalyst with 0.3 at. % content of Fe (0.3 Fe-TiO2) enhanced the photocatalytic activity under low UV-irradiation compared with no intentionally Fe-added TiO2 (zero-iron TiO2) and Aeroxide® TiO2 P25. Furthermore, the enhanced photocatalytic activity of 0.3 Fe-TiO2 under low UV-irradiation may have applications when radiation intensity must be controlled, as in medical applications, or when strong UV absorbing species are present in water.

scholarly journals Improving the photocatalytic activity of nitrogen-doped surface defect TiO2-x nanobelts for degradation of organic pollutants

2020 ◽  
pp. 174751982093867
Author(s):  
Zhen Zhang ◽  
Shao-dong Qin ◽  
Jing-yun Chen ◽  
Jing Li ◽  
Ai-hua Xing
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Pollutants ◽  
Rhodamine B ◽  
Light Absorption ◽  
Surface Defect ◽  
Separation Efficiency ◽  
Visible Light Absorption ◽  
Nitrogen Doped ◽  
N Doping

The synthesis of surface defect TiO2-x nanobelts with excellent visible light absorption is important to reduce costs, increase stability, and improve photocatalytic activity. In this work, we report that nitrogen-doped surface defect TiO2-x nanobelts are synthesized by annealing pristine TiO2 nanobelts in Ar/H2 (95%/5%) atmosphere followed by subsequent heat treatment in NH3 at various temperatures. The aim is to study the effect of the extent of the N-doping amount in the lattice of TiO2-x nanobelts on light absorption and photocatalytic activity. Considering the increase in organic pollutants in wastewater, the photocatalytic activity is measured by degrading rhodamine B (RhB) dye in water. The results demonstrate that the calcination temperature affects the doping level of N, and the b-TiO2-N550 sample exhibits higher photocatalytic performance than that of other samples under visible-light irradiation for the degradation of rhodamine B, which is up to 96.11%. The enhancement is ascribed to the synergistic effect of N-doping and self-doping oxygen vacancy (which extend the visible light absorption) and the separation efficiency of photogenerated carriers, which improves the photocatalytic activity.

Nitrogen-doped titanium oxide microrods decorated with titanium oxide nanosheets for visible light photocatalysis

2010 ◽  
Vol 25 (6) ◽  
pp. 1096-1104 ◽  
Author(s):  
Jum Suk Jang ◽  
Eun Sun Kim ◽  
Hyun Gyu Kim ◽  
Sang Min Ji ◽  
Youngkwon Kim ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Titanium Oxide ◽  
Hydrothermal Reaction ◽  
Structural Evolution ◽  
Ammonium Ion ◽  
Edge Structure ◽  
X Ray ◽  
Nitrogen Doped ◽  
Anatase Titania

Nitrogen-doped titania with a unique two-level hierarchical structure and visible light photocatalytic activity is reported. Thus, nitrogen-doped titanium oxide microrods decorated with N-doped titanium oxide nanosheets were synthesized by a hydrothermal reaction in NH4OH and postcalcination. During the calcination, the in situ incorporation of nitrogen atoms of ammonium ion into titania lattice was accompanied by the structural evolution from titanate to anatase titania. The morphological and structural evolution was monitored by scanning electron microscopy (SEM), x-ray diffraction (XRD), thermogravimetric analysis/differential thermal analysis (TGA/DTA), Raman, Fourier transform infrared (FTIR), x-ray absorption near edge structure (XANES), x-ray photoelectron spectroscopy (XPS), and adsorption isotherms. The N-doping brought visible light absorption, and the material exhibited high photocatalytic activity in the decomposition of Orange II under visible light irradiation (λ ≥ 400 nm), especially when it was loaded with 1 wt% Pt as a cocatalyst.

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