Cobalt-ferrite/Ag-fMWCNT hybrid nanocomposite catalyst for efficient degradation of synthetic organic dyes via peroxymonosulfate activation

2021 ◽  
pp. 112424
Author(s):  
M.O. Abdel-Salam ◽  
Taeho Yoon
Keyword(s):  
Cobalt Ferrite ◽  
Organic Dyes ◽  
Hybrid Nanocomposite ◽  
Nanocomposite Catalyst

scholarly journals MIL-101(Cr)–cobalt ferrite magnetic nanocomposite: synthesis, characterization and applications for the sonocatalytic degradation of organic dye pollutants

RSC Advances ◽  
2020 ◽  
Vol 10 (54) ◽  
pp. 32845-32855 ◽  
Author(s):  
Abbasali Mokhtari Andani ◽  
Tayebeh Tabatabaie ◽  
Saeed Farhadi ◽  
Bahman Ramavandi
Keyword(s):  
Cobalt Ferrite ◽  
Organic Dyes ◽  
Organic Dye ◽  
Magnetic Nanocomposite ◽  
Hydrothermal Route ◽  
Dye Pollutants ◽  
Magnetically Separable

A magnetically separable MIL-101(Cr)/CoFe2O4 binary nanocomposite was prepared via a hydrothermal route and applied as a sonocatalyst for the efficient degradation of organic dyes.

scholarly journals Ultrasonically Induced Sulfur-Doped Carbon Nitride/Cobalt Ferrite Nanocomposite for Efficient Sonocatalytic Removal of Organic Dyes

Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 104 ◽  
Author(s):  
Surabhi Kamal ◽  
Guan-Ting Pan ◽  
Siewhui Chong ◽  
Thomas Chung-Kuang Yang
Keyword(s):  
Methylene Blue ◽  
Rhodamine B ◽  
Photoelectron Spectroscopy ◽  
Congo Red ◽  
Carbon Nitride ◽  
Cobalt Ferrite ◽  
Organic Dyes ◽  
Bandgap Energy ◽  
X Ray ◽  
Dye Pollutants

The sulfur-doped carbon nitride/cobalt ferrite nanocomposite (SCN/CoFe2O4) was prepared via ultrasonication and studied for the sonocatalytic degradation of wastewater organic dye pollutants including methylene blue, rhodamine B, and Congo red. The X-ray photoelectron spectroscopy confirmed the presence and atomic ratios of S, C, N, Co, Fe, and O elements and their corresponding bonds with Co2+ and Fe3+ cations. The nanocomposite was found to have aggregated nanoparticles on a sheet-like structure. The bandgap energy was estimated to be 1.85 eV. For the sonocatalytic degradation of 25-ppm methylene blue at 20 kHz, 1 W and 50% amplitude, the best operating condition was determined to be 1 g/L of catalyst dosage and 4 vol % of hydrogen peroxide loading. Under this condition, the sonocatalytic removal efficiency was the highest at 96% within a reaction period of 20 min. SCN/CoFe2O4 outperformed SCN and CoFe2O4 by 2.2 and 6.8 times, respectively. The SCN/CoFe2O4 nanocomposite was also found to have good reusability with a drop of only 7% after the fifth cycle. However, the degradation efficiencies were low when tested with rhodamine B and Congo red due to difference in dye sizes, structural compositions, and electric charges.

scholarly journals PREPARATION OF COMPOSITE MATERIALS BASED ON COBALT (II) FERRITE FOR PURIFICATION OF AQUEOUS SOLUTIONS

2021 ◽  
Vol 64 (2) ◽  
pp. 95-102
Author(s):  
Nina P. Shabelskaya ◽  
Marina A. Egorova ◽  
Anna V. Arzumanova ◽  
Elena A. Yakovenko ◽  
Vladimir M. Zababurin ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Composite Materials ◽  
Water Treatment ◽  
Cobalt Ferrite ◽  
Organic Dyes ◽  
Foam Glass ◽  
Thermal Power ◽  
Organic Dye ◽  
Simple Method ◽  
Industrial Enterprises

In this paper, composite materials based on cobalt (II) ferrite, which is a promising object of research as a magnetic material, are obtained. Thus, it is known to be used for producing organo / inorganic and non-organo/inorganic compositions. The introduction of cobalt ferrite makes it possible to give new properties to carrier materials. As a carrier, waste from the production of phosphoric acid – phosphogypsum, ash – and – slag waste from thermal power stations and cullet-foam glass, and activated carbon were used. Finding a way to process waste to produce new composite materials is an urgent task of chemical technology. The obtained samples were studied using X-ray phase analysis and electron microscopy. In the course of the conducted research, the principal possibility of using the specified number of production wastes for the synthesis of catalytically active materials is shown. Photocatalytic reactions are widely used in water treatment processes for wastewater treatment from organic pollutants. A simple method for obtaining composite materials of the composition of foam glass/ cobalt ferrite (II), phosphogypsum/ cobalt ferrite (II), activated carbon/ cobalt ferrite (II) is proposed. The catalytic properties of synthesized materials in the process of oxidative destruction of an organic dye in the presence of hydrogen peroxide are studied. It was found that the highest activity under the specified conditions is observed for the activated carbon/ cobalt (II) ferrite composite: complete removal of the organic dye from the aqueous solution is achieved after 90 min from the beginning of the reaction. The phosphogypsum-based composite shows the least pronounced activity. The results obtained can serve as a guide for choosing a method for producing non-toxic materials that are promising for use in water treatment systems and ensuring environmental safety of industrial enterprises that use organic dyes in the production process.

Emergence of bismuth substituted cobalt ferrite nanostructures as versatile candidates for the enhanced oxidative degradation of hazardous organic dyes

2018 ◽  
Vol 42 (18) ◽  
pp. 14965-14977 ◽  
Author(s):  
Surbhi Kapoor ◽  
Ankita Goyal ◽  
Sandeep Bansal ◽  
Sonal Singhal
Keyword(s):  
Cobalt Ferrite ◽  
Organic Dyes ◽  
Oxidative Degradation ◽  
Catalytic Performance

The dramatic enhancement in the catalytic performance with the incorporation of 1% bismuth into the cobalt ferrite lattice has been scrutinized for the oxidative degradation of hazardous dyes.

scholarly journals Green synthesis of Au decorated CoFe2O4 nanoparticles for catalytic reduction of 4-nitrophenol and dimethylphenylsilane oxidation

RSC Advances ◽  
2019 ◽  
Vol 9 (38) ◽  
pp. 22116-22123 ◽  
Author(s):  
Samuel Saire-Saire ◽  
Eduardo C. M. Barbosa ◽  
Daniel Garcia ◽  
Leandro H. Andrade ◽  
Sergi Garcia-Segura ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Chemical Synthesis ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Catalytic Reduction ◽  
Synthesis Process ◽  
Hybrid Nanocomposite ◽  
Cofe2o4 Nanoparticles ◽  
Nanocomposite Catalyst ◽  
Reduction And Oxidation

We present a cleaner chemical synthesis process of a magnetic recoverable Au/CoFe2O4 hybrid nanocomposite catalyst that has remarkable activity in catalytic reduction and oxidation, improved by surface plasmon resonance.

Versatile hierarchical Cu/Fe3O4 nanocatalysts for efficient degradation of organic dyes prepared by a facile, controllable hydrothermal method

RSC Advances ◽  
2015 ◽  
Vol 5 (91) ◽  
pp. 74575-74584 ◽  
Author(s):  
Zhenzhen Wang ◽  
Shangru Zhai ◽  
Jialing Lv ◽  
Haixin Qi ◽  
Wei Zheng ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Organic Dyes ◽  
Nanocomposite Catalyst ◽  
Short Time

A novel monodispersed hierarchical nanocomposite catalyst, Cu/Fe3O4, aimed at efficient degradation of traditional dyes, was successfully synthesized through a short-time, facile, eco-friendly hydrothermal method.

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