Studies on the photocatalytic activity molybdenum doped cadmium selenide nanoparticles towards indigo carmine dye degradation under solar light

2021 ◽  
pp. 1-8
Author(s):  
Emelda Rayappan ◽  
Jaya Rajan Muthaian ◽  
Muthirulan Pandi
Keyword(s):  
Photocatalytic Activity ◽  
Cadmium Selenide ◽  
Dye Degradation ◽  
Indigo Carmine ◽  
Solar Light ◽  
Indigo Carmine Dye ◽  
Cadmium Selenide Nanoparticles

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.

scholarly journals SmFeTaO Photocatalyst for Degradation of Indigo Carmine Dye under Solar Light Irradiation

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Leticia M. Torres-Martínez ◽  
Miguel A. Ruiz-Gómez ◽  
M. Z. Figueroa-Torres ◽  
Isaías Juárez-Ramírez ◽  
Edgar Moctezuma
Keyword(s):  
Solid State ◽  
Sol Gel ◽  
Indigo Carmine ◽  
Light Irradiation ◽  
Solar Light ◽  
Recombination Rates ◽  
Monoclinic Crystal ◽  
Conventional Solid State Reaction ◽  
Solar Light Irradiation ◽  
Indigo Carmine Dye

This paper is focused to study Sm2FeTaO7pyrochlore-type compound as solar photocatalyst for the degradation of indigo carmine dye in aqueous solution. Sm2FeTaO7was synthesized by using conventional solid state reaction and sol-gel method. X-ray diffraction results indicated that Sm2FeTaO7exhibit a monoclinic crystal structure. By scanning electron microscopy analysis, it was observed that sol-gel material presents particle size of around 150 nm. The specific surface area and energy bandgap values were 12 m2 g−1and 2.0 eV, respectively. The photocatalytic results showed that indigo carmine molecule can be degraded under solar light irradiation using the synthesized materials, sol-gel photocatalyst was 8 times more active than solid state. On the other hand, when Sm2FeTaO7was impregnated with CuO as cocatalyst the photocatalytic activity was increased because CuO acts as electron trap decreasing electron-hole pair recombination rates.

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.

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

scholarly journals Photodegradation of Synozol Red HF-6BN on g-C3N4/Halloysite nanocomposites

2021 ◽  
Vol 10 (4) ◽  
pp. xx-xx
Author(s):  
Hoa Nguyen Thi ◽  
Nui Pham Xuan
Keyword(s):  
Photocatalytic Activity ◽  
Clay Minerals ◽  
Recombination Rate ◽  
Carbon Nitride ◽  
Dye Degradation ◽  
Graphitic Carbon ◽  
Degradation Efficiency ◽  
Graphitic Carbon Nitride ◽  
Solar Light ◽  
Calcination Method

In the research, graphitic carbon nitride (g-C3N4) was synthesized using modified halloysite via a calcination method. The improvement of photocatalytic activity mainly benefits from the reduced e-/h+ pairs recombination rate, the improved electron separation yield. The photocatalytic activity of nanocomposite was evaluated through the Synozol red HF-6BN dye degradation, the degradation efficiency approached 99% after 30 mins irradiation under the solar light, and the performance is slightly reduced to 94 % after three consecutive tests. These results have demonstrated an effective method to synthesize g-C3N4 photocatalysts with nanostructures using crude clay minerals.

scholarly journals Enhanced Visible-Light Photocatalytic Performance of SAPO-5-Based g-C3N4 Composite for Rhodamine B (RhB) Degradation

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3948
Author(s):  
Lingfang Qiu ◽  
Zhiwei Zhou ◽  
Mengfan Ma ◽  
Ping Li ◽  
Jinyong Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Redox Reactions ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Thermal Polymerization ◽  
Light Illumination ◽  
Electron Hole ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4 composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4 is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-C3N4 composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1 to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4 to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4 efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4 and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4 efficiently, but also broadens the application of SAPOs in the photocatalytic field.

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