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Antunes M. Application of Graphene-Based Materials. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2748. [PMID: 37887899 PMCID: PMC10609724 DOI: 10.3390/nano13202748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 10/07/2023] [Indexed: 10/28/2023]
Abstract
This Topic on the "Application of Graphene-Based Materials", which consists of a total of twenty-six articles, including two review articles, written by research groups of experts in the field, considers the most recent research and trends on the synthesis and characterization of graphene-based materials, including nanohybrids, intended for a vast array of high-demanding technological applications, namely batteries/fuel cells, aerogels, laser technology, sensors, electronic/magnetic devices, catalysts, etc [...].
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Affiliation(s)
- Marcelo Antunes
- Department of Materials Science and Engineering, Poly2 Group, Technical University of Catalonia (UPC BarcelonaTech), ESEIAAT, C/Colom 11, 08222 Terrassa, Spain
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2
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Devi B, Goswami M, Rabha S, Kalita S, Sarma HP, Devi A. Efficacious Sorption Capacities for Pb(II) from Contaminated Water: A Comparative Study Using Biowaste and Its Activated Carbon as Potential Adsorbents. ACS OMEGA 2023; 8:15141-15151. [PMID: 37151526 PMCID: PMC10157841 DOI: 10.1021/acsomega.3c00142] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 04/11/2023] [Indexed: 05/09/2023]
Abstract
Heavy-metal pollution is a persevering environmental menace, which demands the necessity of its removal by green and ecofriendly adsorbents. To combat this problem, discarded plant biomass can be used as an efficient substitute. Herein, a comparative study has been highlighted for the removal of Pb2+ ions using Euryale ferox Salisbury seed coat and its activated carbon, which is prepared by a first-time-reported activating agent that is a novel and non-hazardous bioresource. The batch investigation revealed a 99.9% removal efficiency of Pb(II) by the activated carbon compared to Euryale ferox Salisbury seed coat, which shows only an 89.5% removal efficiency at neutral pH. The adsorption mechanism is mainly a multilayered process, which involves electrostatic, van der Waals, and hydrogen bonding interactions. The adsorption equilibrium, kinetic, and thermodynamic studies were examined for the biosorbents, which revealed the adsorption process to be feasible, spontaneous, and exothermic with both physisorption and chemisorption adsorption mechanisms. The desorption study asserted the reusability of both the biosorbents to a maximum of three cycles.
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Affiliation(s)
- Bhaswati Devi
- Environmental
Chemistry Laboratory, Resource Management and Environment Section,
Life Science Division, Institute of Advanced
Study in Science and Technology, Guwahati 781035, Assam, India
| | - Manisha Goswami
- Environmental
Chemistry Laboratory, Resource Management and Environment Section,
Life Science Division, Institute of Advanced
Study in Science and Technology, Guwahati 781035, Assam, India
| | - Suprakash Rabha
- Environmental
Chemistry Laboratory, Resource Management and Environment Section,
Life Science Division, Institute of Advanced
Study in Science and Technology, Guwahati 781035, Assam, India
| | - Suravi Kalita
- Environmental
Chemistry Laboratory, Resource Management and Environment Section,
Life Science Division, Institute of Advanced
Study in Science and Technology, Guwahati 781035, Assam, India
- Homi
Bhabha Centre for Science Education, Tata
Institute of Fundamental Research, Mumbai 400088, Maharashtra, India
| | - Hari Prasad Sarma
- Department
of Environmental Science, Gauhati University, Guwahati 781014, Assam, India
| | - Arundhuti Devi
- Environmental
Chemistry Laboratory, Resource Management and Environment Section,
Life Science Division, Institute of Advanced
Study in Science and Technology, Guwahati 781035, Assam, India
- . Fax: +91-361-2273062
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Pushankina P, Baryshev M, Petriev I. Synthesis and Study of Palladium Mono- and Bimetallic (with Ag and Pt) Nanoparticles in Catalytic and Membrane Hydrogen Processes. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4178. [PMID: 36500801 PMCID: PMC9738102 DOI: 10.3390/nano12234178] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 11/14/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
A controlled strategy for the electrochemical synthesis of mono- and bimetallic nanoparticles with a unique and complex morphology has been developed. The investigation of the effect of changing the surfactant concentration and current density regulating the medium pH has revealed the fundamental patterns of nanoparticle growth. The developed method has allowed to synthesis of nanoparticles with a controlled pentabranched structure for the monometallic palladium as well as for favorable combinations of metals-Pd-Ag and Pd-Pt. The obtained nanoparticles were investigated in alkaline methanol oxidation. The results demonstrated quite high catalytic activity up to 83.51 mA cm-2 and long-term stability, which are caused by the increase in electrochemically active surface area by increasing the active center's number. This was made possible due to the creation of unusual nanoparticle morphology, namely the presence of high-energy high-index facets. The developed nanoparticles were also studied as a modifying coating for hydrogen-permeable membranes in the processes of hydrogen transport. The membranes coated with the nanoparticles demonstrated sufficiently high hydrogen flux up to 11.33 mmol s-1 m-2 and high H2/N2 selectivity up to 2254. Such results can be explained by the obvious acceleration of surface processes through the application of the developed nanoparticles. The novel synthesis strategy can potentially be extended to other metal nanoparticle systems. Thus it can be an effective way to solve relevant problems of design of controlled synthetic methods allowing the nanoparticle morphology tuning according to the required functional properties.
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Affiliation(s)
- Polina Pushankina
- Department of Physics, Kuban State University, 350040 Krasnodar, Russia
| | - Mikhail Baryshev
- Department of Physics, Kuban State University, 350040 Krasnodar, Russia
- Laboratory of Problems of Stable Isotope Spreading in Living Systems, Southern Scientific Centre of the RAS, 344006 Rostov-on-Don, Russia
| | - Iliya Petriev
- Department of Physics, Kuban State University, 350040 Krasnodar, Russia
- Laboratory of Problems of Stable Isotope Spreading in Living Systems, Southern Scientific Centre of the RAS, 344006 Rostov-on-Don, Russia
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