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 Probing the surface reactivity of nanocrystals by the catalytic degradation of organic dyes: the effect of size, surface chemistry and composition

2017 ◽  
Vol 5 (23) ◽  
pp. 11917-11929 ◽  
Author(s):  
Jordi Piella ◽  
Florind Merkoçi ◽  
Aziz Genç ◽  
Jordi Arbiol ◽  
Neus G. Bastús ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Surface Coating ◽  
Crystal Size ◽  
Organic Dyes ◽  
Catalytic Performance ◽  
Surface Reactivity ◽  
Catalytic Degradation ◽  
Comprehensive Study

We herein present a comprehensive study on how the catalytic performance and reusability of Au nanocrystals (NCs) are affected by systematic variations of crystal size, surface coating and composition.

scholarly journals Synthesis of a magnetic C@Co material via the design of a MOF precursor for efficient and selective adsorption of water pollutants

2021 ◽  
Author(s):  
Yu Liu ◽  
Yan Wang ◽  
Xiao-Sa Zhang ◽  
Wen-Ze Li ◽  
Ai-Ai Yang ◽  
...  
Keyword(s):  
Active Sites ◽  
Organic Dyes ◽  
Selective Adsorption ◽  
Catalytic Performance ◽  
Adsorption Processes ◽  
Carbon Coated ◽  
Adsorption Of Water ◽  
Metal Organic ◽  
Cobalt Nanoparticle ◽  
Fast Acting

Abstract 3D metal-organic frameworks (MOFs) can be appropriate templates for the fabrication of nanomaterials due to they have active sites exposed on the channel or surface, which thus provide them with improved catalytic performance. In this study, a 3D cobalt-based MOF [Co(H2bpta)]n (Co-MOF), where H4bpta denotes 2,2′,4,4′-biphenyltetracarboxylic acid, has been constructed with the use of a ligand with a high carbon content. On this basis, a 2D magnetic carbon-coated cobalt nanoparticle composite (C@Co) was prepared by using the title MOF. Magnetic C@Co can readily absorb dye from the solution and can thus act as an inexpensive and fast-acting adsorbent. Moreover, we have explored the adsorption isotherms, kinetics and thermodynamics of the anion dyes in detail. The adsorption capacity of the C@Co for investigated methyl orange (MO) and congo red (CR) dyes were 773.48 and 495.66 mg g− 1, respectively. It is noteworthy that MO adsorption is higher in existing materials. Thermodynamic studies suggest that the adsorption processes are spontaneous and exothermic. This study opens a new insight into the synthesis and application of carbon-based materials that enable the selective removal of organic dyes.

Catalytic performance of wrapped CoO by MgO in oxidative degradation of chloroquine phosphate with peroxymonosulfate

2022 ◽  
Vol 573 ◽  
pp. 151430
Author(s):  
Jiabin Dan ◽  
Pinhua Rao ◽  
Qiongfang Wang ◽  
Min Zhang ◽  
Zedi He ◽  
...  
Keyword(s):  
Oxidative Degradation ◽  
Catalytic Performance

Effects of Substituted Transition Metals (Me:Cr3+, Mn3+, Fe3+ and Mo) on the Fe2+/Modified Silica in the Oxidative Degradation of Reactive Black 5

2015 ◽  
Vol 802 ◽  
pp. 531-536 ◽  
Author(s):  
Norhaslinda Nasuha ◽  
B.H. Hameed
Keyword(s):  
Catalytic Activity ◽  
Transition Metals ◽  
Hydroxyl Radicals ◽  
High Stability ◽  
Oxidative Degradation ◽  
Catalytic Performance ◽  
Reactive Black 5 ◽  
Modified Silica

The Fe2+/modified silica catalysts have been substituted with four types of transition metals such as Fe3+, Cr3+, Mn3+ and Mo. The catalytic activity of these catalysts has been tested for the oxidative degradation of Reactive Black 5 (RB5) at 30°C and pH 4.5. The substituted Fe2+/modified silica with Fe3+ (Fe2+:Fe3+/ m-SiO2) exhibited the highest catalytic performance compared to others transition metals by degrading the RB5 nearly to 95%. This catalyst possessed on high stability by maintaining its performance during the three successive cycles of reaction. These findings can be ascribed to the plausible enhancement in the formation of hydroxyl radicals (HO●) due to the effective redox between Fe2+ and Fe3+

One-pot synthesis and assembly of melamine-based nanoparticles for microporous polymer organic frameworks and their application as a support for a silver nanoparticle catalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 69955-69961 ◽  
Author(s):  
Xiaolong Zhao ◽  
Na Yan
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticle ◽  
Ag Nanoparticles ◽  
Organic Dyes ◽  
Catalytic Performance ◽  
One Pot ◽  
Organic Nanoparticles ◽  
Microporous Polymer ◽  
Excellent Catalytic Performance ◽  
Nanoparticle Catalyst

A facile one-pot route was developed to obtain organic nanoparticles for fabrication of microporous POFs which can be utilized to entrap Ag nanoparticles and show excellent catalytic performance for organic dyes such as methylene blue in water.

Preparation of P(St-co-MAA)/CeO2 composite microspheres via surface carboxyl oxidation followed by in situ chemical deposition of CeO2 and their catalytic application on oxidative degradation of methyl orange

RSC Advances ◽  
2014 ◽  
Vol 4 (55) ◽  
pp. 29042-29049 ◽  
Author(s):  
Guanzhi Cheng ◽  
Xinyi Huang ◽  
Hong Zhang ◽  
Yang Hu ◽  
Chengyou Kan
Keyword(s):  
Methyl Orange ◽  
Oxidative Degradation ◽  
Chemical Deposition ◽  
Catalytic Performance ◽  
Composite Microspheres ◽  
Catalytic Application ◽  
Degradation Of Methyl Orange ◽  
Excellent Catalytic Performance

P(St-co-MAA)/CeO2 composites microspheres were fabricated by a novel and facile approach, exhibiting excellent catalytic performance in oxidative degradation.

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.

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