Influence of Different Preparation Methods of Silver-Modified Carbon Nitride on the Photocatalytic Activity towards Indigo Carmine Dye

2020 ◽  
Vol 990 ◽  
pp. 133-138 ◽  
Author(s):  
Ladislav Svoboda ◽  
Richard Dvorsky ◽  
Jiří Bednář ◽  
Dalibor Matýsek ◽  
Marketa Pomiklová
Keyword(s):  
Silver Nanoparticles ◽  
Photocatalytic Activity ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Indigo Carmine ◽  
Ag Nps ◽  
Preparation Methods ◽  
Recombination Probability ◽  
Photogenerated Electrons ◽  
Indigo Carmine Dye

Silver nanoparticles (Ag NPs) may increase photocatalytic activity of widely used photocatalysts under visible light irradiation and decrease recombination probability of photogenerated electrons and holes. In this paper, we report three different preparation methods to obtain Ag/C3N4 nanocomposites. We used Ag nanoparticles a) synthesized by using sodium borohydride, b) synthesized by using UV 365 nm LED and c) already prepared and purchased from company nanoIron. The Ag NPs have been loaded on thermally exfoliated carbon nitride with the aim to form 5 wt.% Ag/C3N4 nanocomposites. Further their photocatalytic activity was tested towards Indigo carmine dye (IC) under 416 nm LED. The results show that method a) loaded different amount and size of Ag NPs on the surface of C3N4, b) changed optoelectronic behaviors of nanocomposites and c) significantly influenced their photocatalytic activity.

Photocatalytic degradation of indigo carmine by using tungsten doped bismuth vanadate

2021 ◽  
Vol 25 (7) ◽  
pp. 86-92
Author(s):  
Yasmin Ahmad ◽  
Suresh Ameta ◽  
Seema Kothari
Keyword(s):  
Photocatalytic Activity ◽  
Light Intensity ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Indigo Carmine ◽  
Bismuth Vanadate ◽  
Photogenerated Electrons ◽  
Gel Technique ◽  
Indigo Carmine Dye

The photocatalytic degradation of indigo carmine dye was studied using tungsten doped BiVO4. Bismuth vanadate powder has been synthesized by sol-gel technique. The incorporation of W ions into BiVO4 was confirmed by EDX. The photocatalytic activity was studied using different samples of BiVO4 by variation of pH, concentration of dye, dose of semiconductor and light intensity. It has been found that degradation of dye is more effective in presence of W doped BiVO4, It shows the role of tungsten ions for enhancing degradation of indigo carmine by reducing the recombination of photogenerated electrons and holes.

Facile synthesis and enhanced visible-light photocatalytic activity of graphitic carbon nitride decorated with ultrafine Fe2O3 nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (112) ◽  
pp. 92033-92041 ◽  
Author(s):  
Xin Liu ◽  
Ailing Jin ◽  
Yushuai Jia ◽  
Junzhe Jiang ◽  
Na Hu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Precipitation Method ◽  
Fe2o3 Nanoparticles ◽  
Facile Synthesis ◽  
Composite Photocatalyst ◽  
Visible Light Photocatalytic

An efficient composite photocatalyst fabricated by dispersing ultrafine Fe2O3 nanocrystals onto g-C3N4 nanosheets via a facile deposition-precipitation method shows significantly enhanced photocatalytic performance under visible light irradiation.

Characteristics and Photocatalytic Activity of TiO2 Thin Film Sensitized with a Porphyrin Dye

2008 ◽  
Vol 8 (5) ◽  
pp. 2699-2702 ◽  
Author(s):  
K. S. Yao ◽  
D. Y. Wang ◽  
C. Y. Chang ◽  
W. Y. Ho ◽  
L. Y. Yang
Keyword(s):  
Thin Film ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Indigo Carmine ◽  
Erwinia Carotovora ◽  
Visible Spectral Region ◽  
Plant Diseases ◽  
Light Irradiation

In this study, a novel porphyrin dye, 5, 10, 15, 20-tetraphenyl-21H, 23H-porphine nickel (TPPN) doped TiO2 (TiO2/TPPN) thin film with visible light respondency was prepared using a sol–gel method and characterized with XRD, SEM, UV-Vis instruments. The observation showed that the absorption edge of TPPN dye-doped thin film shifted into the visible light region. The photocatalytic indigo carmine degradation results showed that under visible light irradiation (λ > 400 nm) for 6 hrs, the photocatalytic activity of TiO2 thin film sensitized with 200 μM of TPPN dye showed the best performance, with an indigo degradation ratio up to 96%. Moreover, the TiO2/TPPN thin film showed a relevant photocatalytic bactericidal effect on Erwinia carotovora subsp. carotovora 7 induced vegetable soft rot disease in the visible spectral region. Evidence for the photocatalytic disinfection technique against a plant pathogen under visible light irradiation will have potential for direct application in future control of plant diseases in irrigation water systems.

scholarly journals Ce-Doped Graphitic Carbon Nitride Derived from Metal Organic Frameworks as a Visible Light-Responsive Photocatalyst for H2 Production

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1539 ◽  
Author(s):  
Liangjing Zhang ◽  
Zhengyuan Jin ◽  
Shaolong Huang ◽  
Yiyue Zhang ◽  
Mei Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Metal Organic Frameworks ◽  
Graphitic Carbon ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Enhanced Absorption ◽  
Metal Organic

Novel fibrous graphitic carbon nitride (g-C3N4) derivatives prepared from metal organic frameworks (MOFs) were doped with Ce3+ (Ce-C3N4) as photocatalytic materials. Ce-C3N4 was characterized using various techniques, revealing its high specific surface area, excellent photocatalytic activity, and stability for H2 evolution under visible light irradiation. The fluorine modified samples show superior photocatalytic activity under visible light irradiation, which is due to the presence of more active sites and enhanced absorption of solar energy. This work provides a new synthetic route for MOF-derived g-C3N4 that can be doped with different metal ions. The fluorine modified Ce-C3N4 is an efficient photocatalyst with potential for many applications related to energy and the environment.

Novel one-dimensional Bi2O3–Bi2WO6 p–n hierarchical heterojunction with enhanced photocatalytic activity

2014 ◽  
Vol 2 (22) ◽  
pp. 8517-8524 ◽  
Author(s):  
Yin Peng ◽  
Mei Yan ◽  
Qing-Guo Chen ◽  
Cong-Min Fan ◽  
Hai-Yan Zhou ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Compounds ◽  
Visible Light Irradiation ◽  
Electrostatic Field ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Junction Region ◽  
One Dimensional ◽  
Photogenerated Electrons

A novel Bi2O3–Bi2WO6 p–n junction photocatalyst exhibits high photocatalytic activity for the degradation of organic compounds under solar/visible light irradiation, which is ascribed to the effective separation of photogenerated electrons and holes by the internal electrostatic field in the junction region.

Synthesis, characterization and photocatalytic activity of CaZrO3 - SiO2 nanocomposite for the decolorization of indigo carmine dye

2018 ◽  
Vol 125 ◽  
pp. 102-110
Author(s):  
Neda Kermani ◽  
Seyed Saeed Mirzaee ◽  
Mohammad Ebrahim Olya ◽  
Sayyed Mohammad Javad Mirzaei
Keyword(s):  
Photocatalytic Activity ◽  
Indigo Carmine ◽  
Indigo Carmine Dye
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