Sonochemical preparation and characterization of Sm doped GO/KSrPO 4 nanocomposite photocatalyst for degradation of methylene blue dye

2021 ◽  
Author(s):  
Jyotsna S. Bajpai ◽  
Divya P. Barai ◽  
Bharat A. Bhanvase ◽  
Vijay B. Pawade
Keyword(s):  
Methylene Blue ◽  
Blue Dye ◽  
Methylene Blue Dye

Fabrication and characterization of Fe2O3, Bi2O3 and BiFeO3 and evaluation of their photo catalytic performances on degradation of methylene blue dye

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Fiza Akram ◽  
Muhammad Saeed ◽  
Javaid Akhtar ◽  
Syed Ali Raza Naqvi ◽  
Atta ul Haq
Keyword(s):  
Methylene Blue ◽  
Free Energy ◽  
Dye Degradation ◽  
Precipitation Method ◽  
Blue Dye ◽  
X Rays ◽  
Methylene Blue Dye ◽  
X Ray Diffraction ◽  
Blue Solution

Abstract This study reports the fabrication of Fe2O3, Bi2O3, and BiFeO3, characterization and evaluation of the photocatalytic performances for methylene blue dye degradation. The materials were synthesized by precipitation method and characterized by scanning electron microscopy, X-ray diffraction, energy dispersive X-rays analyses, and Fourier transform infrared analyses. The photocatalytic activities of Fe2O3, Bi2O3, and BiFeO3 were compared by performing degradation experiments with 50 mL of 100 mg/L methylene blue solution. The as-prepared BiFeO3 was found as 2.4 times and 1.7 times more effective than Fe2O3 and Bi2O3, with a 79, 47, and 57% catalytic activity, respectively. The degradation of methylene blue over the BiFeO3 catalyst was optimized in terms of pH, catalyst dosage, temperature, and methylene blue concentration. The Eley–Rideal mechanism was proposed to describe the reaction kinetics in terms of the first order and second order kinetics model. Activation energy E (kJ/mol), enthalpy ΔH (kJ/mol), entropy ΔS (J/mol) and free energy ΔG (kJ/mol) were calculated as 20.8, 18.2, 197.5 and −45.3 respectively. The negative value of free energy shows that photodegradation is favored in present conditions.

Synthesis and characterization of the MNP@SiO2@TiO2 nanocomposite showing strong photocatalytic activity against methylene blue dye

2021 ◽  
pp. 152195
Author(s):  
Ítalo Lacerda Fernandes ◽  
Danns Pereira Barbosa ◽  
Sérgio Botelho de Oliveira ◽  
Valdeir Antônio da Silva ◽  
Marcelo Henrique Sousa ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Synthesis And Characterization ◽  
Blue Dye ◽  
Methylene Blue Dye

scholarly journals The Influence of Calcination Temperatures in TiO2 Impregnated Ouw’s Natural Clay on Its Degradation Activity of Methylene Blue Dye

2018 ◽  
Vol 1 (1) ◽  
pp. 008-014
Author(s):  
Science Nature
Keyword(s):  
Methylene Blue ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Natural Clay ◽  
Calcination Process ◽  
Impregnation Process ◽  
Calcination Temperatures ◽  
Degradation Activity ◽  
Ir Analysis

The influence of calcination temperatures in TiO2  impregnated Ouw’s natural clay on its degradation activity of methylene blue dye has been done. Calcination process was conducted at various temperatures of 200, 300, and 400 oC. The characterization of TiO2 impregnated clay’s structure was examined by IR analysis. The result showed that Ouw’s natural clay has characterized vibrations of montmorillonite and thermal effect didn’t affect the structure of TiO2 impregnated clay. The highest result of methylene blue’s degradation occurred in the addition of TiO2 impregnated clay calcinated at 200 oC (98.69%). This result was found that calcination temperatures of impregnation process were significantly affect the degradation activity of TiO2­ impregnated clays.

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