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Related Concept Videos

Bioplastics01:27

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...

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Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
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A Comprehensive Life Cycle Assessment of Graphene Derivatives Synthesized by a Modified Hummers' Method.

Vasileios Tzatzadakis1, Evangelia Giannakaki2, Fanourios Krasanakis2

  • 1Department of Nursing, School of Health Sciences, Hellenic Mediterranean University, 714 10 Heraklion, Crete, Greece.

ACS Omega
|January 26, 2026
PubMed
Summary

This study analyzes the environmental impact of graphene oxide (GO) and reduced graphene oxide (rGO) production. While GO synthesis shows lower CO2 emissions, rGO production has higher emissions and energy use, indicating areas for process optimization.

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Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions

Published on: July 3, 2025

Area of Science:

  • Materials Science and Engineering
  • Environmental Science
  • Chemical Engineering

Background:

  • Graphene oxide (GO) and reduced graphene oxide (rGO) are crucial nanomaterials with diverse applications.
  • Understanding the environmental footprint of their synthesis is vital for sustainable nanotechnology development.
  • Life Cycle Assessment (LCA) provides a framework for evaluating environmental impacts.

Purpose of the Study:

  • To conduct a laboratory-scale Life Cycle Assessment (LCA) for the synthesis of graphene oxide (GO) and its subsequent reduction to reduced graphene oxide (rGO).
  • To quantify key environmental indicators including global warming potential (GWP100), energy consumption, resource depletion, and ecotoxicity.
  • To compare experimental findings with existing literature data for validation and to identify areas for environmental impact reduction.

Main Methods:

  • Utilized a modified Hummers' method for high-yield GO synthesis.
  • Employed hydroiodic acid/acetic acid (HI/AcOH) for the chemical reduction of GO to rGO.
  • Performed LCA based on experimental data, analyzing indicators like CO2 emissions, energy consumption, acidification, eutrophication, and ecotoxicity.

Main Results:

  • GO synthesis resulted in 1.78 g CO2 per gram, marginally lower than literature values.
  • rGO chemical preparation yielded 4.24 g CO2 per gram, exceeding the typical range of 1.4-2.7 g CO2 per gram.
  • Energy consumption was approximately 25 kJ/g for GO and 61 kJ/g for rGO, aligning with previous studies. Broader environmental impacts like acidification and ecotoxicity were also assessed.

Conclusions:

  • The synthesis of GO and rGO has notable environmental implications, particularly in CO2 emissions and energy consumption during the reduction step.
  • Further optimization of energy efficiency and waste management strategies for oxidation and reduction processes is necessary.
  • This study serves as a model for developing more sustainable graphene derivatives and nanocomposites for nanotechnology applications.