Activated charcoal and graphenic carriers for pesticide release

Overview

Functional graphenic materials (FGMs) are innovative carriers designed for the controlled release of hydrophobic pesticides. Comprising graphene oxide and activated charcoal, these materials provide a cost-effective and biodegradable alternative to traditional polymer micro-capsules. By utilizing the hydrophobic carbon backbone of FGMs and manipulating their hydrophilic surface chemistry, precise control over water dispersibility and pesticide release profiles is achieved. This technology offers significant potential for sustainable agricultural practices by ensuring efficient pesticide delivery and minimizing environmental impact.

Technical specifications

• Materials: Combination of graphene oxide and activated charcoal
• Particle size: Optimal controlled release observed at ~3 µm
• Release mechanisms: Burst release via adsorption; sustained release through covalent attachment
• Biodegradability: FGMs degrade into humic acid-like structures, ensuring environmental safety
• Loading techniques: Utilizes adsorption or labile covalent bonds, such as esters
• Analytical methods: XPS, TGA, FTIR for loading efficiency and payload confirmation; DLS and microscopy for particle size measurement
• Release performance: Aims for >90% pesticide release over 3 months
• Degradation standards: Assessed using ISO 17556:2019, achieving 90% degradation in soil at 12 °C within 24 months

Technology readiness level

This technology is currently at TRL 4, indicating that it has been validated in the laboratory setting and is ready for further development and testing in more complex environments.