Mineralization of malachite green dye over visible light responsive bismuth doped TiO2–ZrO2 ferromagnetic nanocomposites

2015 ◽  
Vol 39 (5) ◽  
pp. 3629-3638 ◽  
Author(s):  
Archana Charanpahari ◽  
Sachin G. Ghugal ◽  
Suresh S. Umare ◽  
Rajamma Sasikala

Visible light responsive, ferromagnetic, reusable Bi doped TiO2–ZrO2 nanocomposites exhibit enhanced photodegradation and mineralization of malachite green dye. Hydroxyl radicals, holes and superoxides are active species in photodegradation.

2020 ◽  
Vol 10 (6) ◽  
pp. 849-859
Author(s):  
Radwa A. El-Salamony ◽  
Abeer A. Emam ◽  
Nagwa A. Badawy ◽  
Sara F. El-Morsi

Objective: ZnO nanoparticles were synthesized using wet impregnation method, and activated carbon from rice straw (RS) prepared through chemical route. Methods: The nano-composites ZnO-AC series were prepared with different ZnO:AC ratio of 10, 20, 50, and 70% to optimize the zinc oxide nanoparticles used. The obtained composites were characterized by FE-SEM, XRD, SBET, and optical techniques then used for the photo-degradation of Malachite green dye (MG) under visible light. Results: It was found that 10ZnO-AC exhibited excellent visible light photo-catalytic performance. The ·OH radicals’ formation is matching with photo-activity of the prepared composites. The photo-degradation efficiency of MG increased from 63% to 93%, when the 10ZnO-AC photocatalyst amount was increased from 0.5 to 6 g/L. Conclusion: The GC-MS technique was used to analyze the intermediates formed; up to 15 kinds of chemicals were identified as the degradation products.


2016 ◽  
Vol 42 (4) ◽  
pp. 4672-4678 ◽  
Author(s):  
Mohammad W. Kadi ◽  
David McKinney ◽  
Reda M. Mohamed ◽  
Ibraheem. A. Mkhalid ◽  
Wolfgang Sigmund

2020 ◽  
Vol 258 ◽  
pp. 110043 ◽  
Author(s):  
Alaa Magdy Saad ◽  
Mostafa R. Abukhadra ◽  
Sayed Abdel-Kader Ahmed ◽  
Ali M. Elzanaty ◽  
Amr H. Mady ◽  
...  

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