scholarly journals Crystallization of well-defined anatase nanoparticles in SBA-15 for the photocatalytic decomposition of acetic acid

RSC Advances ◽  
2020 ◽  
Vol 10 (54) ◽  
pp. 32350-32356
Author(s):  
Kasimanat (Guy) Vibulyaseak ◽  
Bunsho Ohtani ◽  
Makoto Ogawa
Keyword(s):  
Acetic Acid ◽  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Photocatalytic Decomposition ◽  
Commercial Titanium ◽  
Anatase Nanoparticles ◽  
Titanium Dioxides

Crystallization of well-defined anatase nanoparticles (5 nm) in the mesopore (6 nm) of SBA-15 over 400 °C, results the high photocatalytic activity for decomposition of acetic acid compared with other commercial titanium dioxides.

Enhancing the Photocatalytic Activity of La/Y Co-Doped ZnWO4 under UV Irradiation

2020 ◽  
Vol 842 ◽  
pp. 214-222
Author(s):  
Chu Wen Rao ◽  
Wei Zhang ◽  
Zheng Fa Hu ◽  
Zu Yong Feng ◽  
Ying Jun Chen ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Uv Irradiation ◽  
Photoelectron Spectroscopy ◽  
Broad Band ◽  
Solid State Reaction Method ◽  
High Photocatalytic Activity ◽  
Photocatalytic Decomposition ◽  
X Ray ◽  
Co Doping ◽  
Broad Band Emission

In this paper, ZnWO4: La3+, Y3+ photocatalysts were synthesized by a high-temperature solid state reaction method. The effects of La3+ and Y3+ doping contents on the phase, morphologies and optical properties of the samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Diffuse reflectance spectra (DRS), photoluminescence spectra (PL), Raman and UV-visible spectroscopy, respectively. The as-prepared ZnWO4:La3+, Y3+ photocatalysts showed photoluminescence with a broad band emission, and high photocatalytic activity in degradation of rhodamine B (RhB) under simulated UV irradiation. The results showed that co-doping in ZnWO4 can enhance light harvesting capability to generate more electron-hole pairs, and acted as a trap center by decreasing the recombination of photogenerated electrons and holes. All the results obtained by the work suggest that ZnWO4: La3+, Y3+ photocatalysts are promising materials for the photocatalytic decomposition of pollutants.

PVA(Polyvincyl Acohol)-assisted Hydrothermal Preparation of Bi25FeO40 and Its Photocatalytic Activity

2009 ◽  
Vol 1217 ◽  
Author(s):  
Li Jianmin ◽  
Juyue Song ◽  
Jianguo Chen ◽  
Shengwen Yu ◽  
Dengren Jin ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Organic Contaminants ◽  
Diffuse Reflectance ◽  
Single Phase ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy ◽  
High Photocatalytic Activity ◽  
Photocatalytic Decomposition ◽  
Hydrothermal Preparation ◽  
Degradation Of Methyl Orange

AbstractA PVA-assisted hydrothermal synthesis route was utilized to fabricate single-phase Bi25FeO40 crystallites.X-ray diffraction results indicated that sillenite Bi25FeO40 have been synthesized at the temperature of 200 ℃ using the KOH concentration of 7 M. Scanning electron microscopy showed the morphology of the as-prepared products were cubic shape with side length of 26μm. The band gap of Bi25FeO40 was determined to be 1.8 eV (688 nm) by using UV-vis diffuse reflectance spectroscopy. It was found that Bi25FeO40 exhibited a high photocatalytic activity for the degradation of methyl orange under UV-Vis irradiation, being a potential material for photocatalytic decomposition of organic contaminants.

scholarly journals Mechanochemical Synthesis of Visible Light Sensitive Titanium Dioxide Photocatalyst

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Jan Šubrt ◽  
Jose M. Criado ◽  
Lórant Szatmáry ◽  
Maria J. Diánez-Millán ◽  
Nataliya Murafa ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Region ◽  
High Photocatalytic Activity ◽  
Photocatalytic Decomposition ◽  
Visible Absorption ◽  
Ground Sample ◽  
Ammonium Carbamate ◽  
Light Region ◽  
Anatase Nanoparticles ◽  
Kinetics Of

Phase transition of anatase nanoparticles into the phases TiO2-II and rutile under grinding was studied. The addition of ammonium carbamate to the reaction mixture inhibits the phase conversion and the cold welding of particles. The UV-visible absorption spectrum showed narrowing the band gap width after grinding with an ammonium carbamate additive resulting in shift of the light absorption of the ground sample towards the visible region. By EPR, intensive formation of OH•radical at irradiation of the sample with both UV (λ> 300 nm) and visible (λ> 435 nm) light was observed. High photocatalytic activity of the ground sample in visible light region was demonstrated also by measurement of kinetics of the photocatalytic decomposition of 4-chlorophenol.

Modification of Multi-walled Carbon Nanotubes with Nanoparticles for High Photocatalytic Activity

2015 ◽  
Vol 11 (4) ◽  
pp. 504-508 ◽  
Author(s):  
Tong Ling Tan ◽  
Sharifah Bee Abd Hamid ◽  
Chin Wei Lai
Keyword(s):  
Carbon Nanotubes ◽  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

A copper anchored on phosphorus g-C3N4 as a highly efficient photocatalyst for synthesis of N-arylpyridin-2-amines

2021 ◽  
Author(s):  
Jia-Qi Di ◽  
Mo Zhang ◽  
Yu-Xuan Chen ◽  
Jin-Xin Wang ◽  
Shan-Shan Geng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Recyclable Catalyst ◽  
Highly Efficient ◽  
Phosphorus Doped

A heterogeneous photocatalyst based on copper modified phosphorus doped g-C3N4 (Cu/P-CN) has been prepared and characterized. This recyclable catalyst exhibited high photocatalytic activity for the synthesis of N-arylpyridin-2-amine derivatives by...

Carbon Nitride Functionalized with Sb Resulting in High Photocatalytic Activity

2021 ◽  
Author(s):  
Luhong Zhang ◽  
Zhengyuan Jin ◽  
Jiyu Huang ◽  
Yiyue Zhang ◽  
Shaolong Huang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Carbon Nitride ◽  
High Photocatalytic Activity

Engineering Nanocrystalline Titania Thin Films for High Photocatalytic Activity

2019 ◽  
Vol 9 ◽  
pp. 621-626 ◽  
Author(s):  
Vijila Kalarivalappil ◽  
Baiju K.Vijayan ◽  
Viswanathan Kumar
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Nanocrystalline Titania

scholarly journals Study of the Effect of TiO2 Layer on the Adsorption and Photocatalytic Activity of TiO2-MoS2 Heterostructures under Visible-Infrared Light

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
N. Cruz-González ◽  
O. Calzadilla ◽  
J. Roque ◽  
F. Chalé-Lara ◽  
J. K. Olarte ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Nitrogen Adsorption ◽  
High Photocatalytic Activity ◽  
Infrared Light ◽  
Polluted Water ◽  
Light Spectrum ◽  
X Ray

In the last decade, the urgent need to environmental protection has promoted the development of new materials with potential applications to remediate air and polluted water. In this work, the effect of the TiO2 thin layer over MoS2 material in photocatalytic activity is reported. We prepared different heterostructures, using a combination of electrospinning, solvothermal, and spin-coating techniques. The properties of the samples were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, UV-Vis diffuse reflectance spectroscopy (UV-Vis-DRS), and X-ray photoelectron spectroscopy (XPS). The adsorption and photocatalytic activity were evaluated by discoloration of rhodamine B solution. The TiO2-MoS2/TiO2 heterostructure presented three optical absorption edges at 1.3 eV, 2.28 eV, and 3.23 eV. The high adsorption capacity of MoS2 was eliminated with the addition of TiO2 thin film. The samples show high photocatalytic activity in the visible-IR light spectrum.

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