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Mahouche-Chergui S, Oun A, Haddadou I, Hoyez C, Michely L, Ouellet-Plamondon C, Carbonnier B. Efficient and Recyclable Heterogeneous Catalyst Based on PdNPs Stabilized on a Green-Synthesized Graphene-like Nanomaterial: Effect of Surface Functionalization. ACS APPLIED MATERIALS & INTERFACES 2021; 13:44673-44685. [PMID: 34506108 DOI: 10.1021/acsami.1c07540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This work reports for the first time a straightforward and efficient approach to covalent surface functionalization of a sustainable graphene-like nanomaterial with abundant carboxylic acid groups. This approach results in an efficient and robust chelatant platform for anchoring highly dispersed ultrasmall palladium particles with excellent catalytic activity in the reduction of both cationic (methylene blue, MB) and anionic (eosin-Y, Eo-Y) toxic organic dyes. The large-specific-surface-area (SBET = 266.94 m2/g) graphene-like nanomaterial (GHN) was prepared through a green and cost-effective pyrolysis process from saccharose using layered bentonite clay as a template. To introduce a high density of carboxylic acid functions, GHN was first doubly functionalized by successive grafting reaction using two different strategies: (i) in the first case, GHN was first grafted by (3-glycidyloxypropyl) trimethoxysilane (GPTMS) and then bifunctionalized by chemical grafting of tris(4-hydroxyphenyl)methane triglycidyl ether (TGE). In the second case, the grafting order of the two molecules has been reversed. GHN-GPTMS-TGE provided the highest number of grafted reactive epoxy groups, and it was selected for further functionalization with carboxylic acid functions via a ring-opening reaction through a two-step hydrolysis (H2SO4)/oxidation (KMnO4) approach. The GHN nanomaterial bearing carboxylic acid groups was then treated with sodium hydroxide to produce a deprotonated carboxylic acid-rich platform. Finally, due to a high density of accessible chelatant carboxylic acid groups, GHN-COO- binds strongly a great amount of Pd2+ ions to form stable complexes which after reduction by NaBH4 leads to highly dispersed, densely anchored, and uniformly distributed nanoscale Pd particles (d ∼ 4.5 nm) on the surface of the functionalized GHN. The GHN-COO-@PdNPs nanohybrid proved to be highly efficient for dye reduction by NaBH4 in aqueous solution at room temperature. Moreover, because of the high stability of the as-prepared graphene-like supported PdNPs, it exhibited very good reusability and could be recycled up to eight times without any significant loss in activity.
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Affiliation(s)
| | - Abdallah Oun
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 Rue Henri Dunant, Thiais 94320, France
| | - Imane Haddadou
- Construction Engineering Department, École de Technologie Supérieure, 1100 Notre-Dame West, Montreal, Quebec H3C 1K3, Canada
| | - Clémentine Hoyez
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 Rue Henri Dunant, Thiais 94320, France
| | - Laurent Michely
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 Rue Henri Dunant, Thiais 94320, France
| | - Claudiane Ouellet-Plamondon
- Construction Engineering Department, École de Technologie Supérieure, 1100 Notre-Dame West, Montreal, Quebec H3C 1K3, Canada
| | - Benjamin Carbonnier
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 Rue Henri Dunant, Thiais 94320, France
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Hoepfner JC, Loos MR, Pezzin SH. Role of the degree of acetalization on dynamic mechanical properties of polyvinyl butyral/carbon nanotube composites. J Appl Polym Sci 2019. [DOI: 10.1002/app.48146] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jean Carlos Hoepfner
- Department of Materials EngineeringState University of Ponta Grossa Ponta Grossa Paraná Brazil
| | - Marcio Rodrigo Loos
- Department of PhysicsSanta Catarina Federal University Blumenau Santa Catarina Brazil
| | - Sérgio Henrique Pezzin
- Center of Technological SciencesSanta Catarina State University Joinville Santa Catarina Brazil
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Rathore DK, Prusty RK, Ray BC. Mechanical, thermomechanical, and creep performance of CNT embedded epoxy at elevated temperatures: An emphasis on the role of carboxyl functionalization. J Appl Polym Sci 2017. [DOI: 10.1002/app.44851] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Dinesh Kumar Rathore
- Composite Materials Group, Metallurgical and Materials Engineering; National Institute of Technology; Rourkela 769008 India
| | - Rajesh Kumar Prusty
- Composite Materials Group, Metallurgical and Materials Engineering; National Institute of Technology; Rourkela 769008 India
| | - Bankim Chandra Ray
- Composite Materials Group, Metallurgical and Materials Engineering; National Institute of Technology; Rourkela 769008 India
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