ArticleSensors (Basel, Switzerland)2019
Waste Coffee Ground Biochar: A Material for Humidity Sensors.
Article in Sensors (Basel, Switzerland), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
What it found
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The trial behind it
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Who cites it
11 citing papers in PubMed.
- Fluorescent Carbon Dots from Biomass Waste: Photoluminescent Behavior and Toxicity Profile ValidatedACS omega · 2026Article
- Mechanical and Anti-Icing Properties of Polyurethane/Carbon Fiber-Reinforced Polymer Composites with Carbonized Coffee Grounds.Materials (Basel, Switzerland) · 2025Article
- The impact of carbon quantum dots derived from spent coffee grounds on the droplet combustion of diesel/n-butanol blend.Heliyon · 2024Article
- A portable electrochemical immunosensor for ovarian cancer uses hierarchical microporous carbon material from waste coffee grounds.Mikrochimica acta · 2023Article
- Reusing Waste Coffee Grounds as Electrode Materials: Recent Advances and Future Opportunities.Global challenges (Hoboken, NJ) · 2023Review
- New Technologies to Decontaminate Pollutants in Water: A Report about the State of the Art.Toxics · 2022Article
- Phytic Acid and Biochar: An Effective All Bio-Sourced Flame Retardant Formulation for Cotton Fabrics.Polymers · 2020Article
- Article
- A Review of Non-Soil Biochar Applications.Materials (Basel, Switzerland) · 2020Review
- Structure-Property Relationships in Polyethylene-Based Composites Filled with Biochar Derived from Waste Coffee Grounds.Polymers · 2019Article
- Carbon-Based Materials for Humidity Sensing: A Short Review.Micromachines · 2019Review
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
Worldwide consumption of coffee exceeds 11 billion tons/year. Used coffee grounds end up as landfill. However, the unique structural properties of its porous surface make coffee grounds popular for the adsorption of gaseous molecules. In the present work, we demonstrate the use of coffee grounds as a potential and cheap source for biochar carbon. The produced coffee ground biochar (CGB) was investigated as a sensing material for developing humidity sensors. CGB was fully characterized by using laser granulometry, X-ray diffraction (XRD), Raman spectroscopy, field emission-scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA) and the Brunnauer Emmett Teller (BET) technique in order to acquire a complete understanding of its structural and surface properties and composition. Subsequently humidity sensors were screen printed using an ink-containing CGB with polyvinyl butyral (PVB) acting as a temporary binder and ethylene glycol monobutyral ether, Emflow, as an organic vehicle so that the proper rheological characteristics were achieved. Screen-printed films were the heated at 300℃ in air. Humidity tests were performed under a flow of 1.7 L/min in the relative humidity range 0⁻100% at room temperature. The initial impedance of the film was 25.2 0.15 MΩ which changes to 12.3 MΩ under 98% humidity exposure. A sensor response was observed above 20 % relative humidity (RH). Both the response and recovery times were reasonably fast (less than 2 min).
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Registered trials
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