Preparation of Sponge Like Graphene Oxide Materials for CO2 Capture and /or Catalysis

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 3422

Special Issue Editor

POLYMAT-University of the Basque Country (UPV/EHU)
Interests: synthesis of polymers; characterization of polymeric and composite materials; Properties and applications of polymeric/composite materials; block copolymers; composites; polymerization techniques; anionic polymerization; chemical modifications; coatings; hydrophobicity; responsive materials; graphene; CO2 adsorption; reduced graphene monoliths; polymer brushes; nanoparticles; amphiphilic materials; smart materials; photocatalysis; atomic force microscopy; scanning electron microscopy; morphological characterization; molecular characterization
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Special Issue Information

Dear Colleagues,

The World is changing drastically due to anthropogenic activities in different levels of our lives. Climate change is an existing problem whose consequences are growing both in numbers and in size day by day. Carbon dioxide (CO2) emission is drastically rising and, being the most abundant greenhouse gas, it is one of the primary causes for the global warming. These changes are obvious every day and have a serious negative impact on all inhabitants of earth. Since the industrial revolution, there has been a constant increase in CO2 in the atmosphere due to the continuing dependence of fossil fuels, now reaching 400 ppm. In recent years, humanity has been devoted to developing alternative energy solutions; unfortunately, the majority of the world’s energy is still supplied from fossil fuel (at least 85%). CO2 capture and sequestration play an important role in reducing atmospheric CO2 concentration. Therefore, the development of effective technologies to reduce atmospheric CO2 concentration is very important.

To date, various solid adsorbents have been considered. For efficient CO2 capture, an easy way to produce solid sorbents as monoliths is important. Among all monolithic structures, carbon-based ones are potentially of interest and developing rapidly. The demonstrated chemical, thermal, and mechanical stability, relatively high capacity, and steadiness in cycle operations further improve scale-up feasibility. An important player in these sponge-like monolithic structures for CO2 capture is graphene. Graphene monoliths can capture and/or catalyze CO2 into useful substances. 

This Special Issue of Applied Sciences, “Preparation of Sponge-Like Graphene Oxide Materials for CO2 Capture and /or Catalysis”, is intended for a wide and interdisciplinary audience and covers recent advances in:

  • Synthesis of graphene sponge like monoliths;
  • Theoretically modeling for CO2 adsorption with graphene;
  • Catalysis of CO2 from graphene-based materials;
  • Real time applications for CO2 capture;
  • Monolithic composites with particles or polymers.

Dr. Nikolaos Politakos
Guest Editor

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Keywords

  • Reduced graphene oxide
  • CO2 Adsorption
  • Sponge-like materials
  • Catalysis
  • Monoliths
  • Porous materials
  • Graphene
  • 3D materials

Published Papers (2 papers)

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Research

19 pages, 7941 KiB  
Article
CO2 Capture by Reduced Graphene Oxide Monoliths with Incorporated CeO2 Grafted with Functionalized Polymer Brushes
by Nikolaos Politakos, Luis Serrano Cantador, Juan Antonio Cecilia, Iranzu Barbarin and Radmila Tomovska
Appl. Sci. 2021, 11(23), 11154; https://0-doi-org.brum.beds.ac.uk/10.3390/app112311154 - 24 Nov 2021
Cited by 1 | Viewed by 1639
Abstract
The monolithic materials of reduced graphene oxide (rGO) can be used successfully in CO2 adsorption. Here, the incorporation of CeO2 particles with and without polymer brushes grafted from the particles showed that the structural properties could be changed, affecting the adsorption [...] Read more.
The monolithic materials of reduced graphene oxide (rGO) can be used successfully in CO2 adsorption. Here, the incorporation of CeO2 particles with and without polymer brushes grafted from the particles showed that the structural properties could be changed, affecting the adsorption of CO2. Polymer brushes of (1) poly(acrylic acid) (PAA), (2) poly(vinyl caprolactam) (PVCL) and (3) poly[(2-(methacryloyloxy)ethyl) trimethylammonium chloride] (PMETAC) were grafted from CeO2 via reversible addition−fragmentation chain transfer (RAFT) polymerization. The preparation of monoliths of rGO with different modified CeO2 particles led to different thermal properties (TGA), structural changes (BET isotherms) and CO2 adsorption. The responsive character of the CeO2@polymer was proven by the DLS and UV results. The responsive character of the particles incorporated into the rGO monolith affected not only the adsorption capacity but also the microstructure and values of the surface volume of the pores of the monolith. Monoliths with porosity values for better adsorption were affected by the responsive character of the polymer. Full article
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22 pages, 3830 KiB  
Article
Understanding the Adsorption Capacity for CO2 in Reduced Graphene Oxide (rGO) and Modified Ones with Different Heteroatoms in Relation to Surface and Textural Characteristics
by Nikolaos Politakos, Tomás Cordero-Lanzac and Radmila Tomovska
Appl. Sci. 2021, 11(20), 9631; https://0-doi-org.brum.beds.ac.uk/10.3390/app11209631 - 15 Oct 2021
Cited by 2 | Viewed by 1210
Abstract
Reduced graphene oxide is a material that has a variety of applications, especially in CO2 adsorption. The study of this research is the preparation of reduced graphene oxide with different heteroatoms and how the adsorption capacity is changed. The functionalization with other [...] Read more.
Reduced graphene oxide is a material that has a variety of applications, especially in CO2 adsorption. The study of this research is the preparation of reduced graphene oxide with different heteroatoms and how the adsorption capacity is changed. The functionalization with other compounds bearing Si, S, N, and O was before reducing graphene oxide. Different monoliths were prepared by changing the ascorbic acid analogy and the temperature of reduction. The different porosity values, percentages of heteroatoms, and synthetic parameters show that the adsorption capacity is a complex procedure that can be affected by multiple parameters. Microporosity, different functionalities from heteroatoms, and high surface/volume of pores are the significant parameters that affect adsorption. All parameters should establish a balance among all parameters to achieve high adsorption of CO2. Full article
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