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Item type:Publication, Sustainable synthesis, reduction and applications of graphene obtained from renewable resources(Elsevier, 2021-09-01)Graphene is a revolutionary material with outstanding electrical, mechanical, thermal, and structural properties. The synthesis of graphene and its derivatives generally requires expensive and poisonous reagents. However, contemporary research efforts are switching towards more sustainable routes. The present review focused on the synthesis, performance, and applications of graphene-derived nanomaterials synthesized from waste biomass and reduced by green alternatives. Graphitization of waste carbon precursors is the most used method to obtain high purity graphite alternatives. Other methods, such as CVD, hydrothermal, laser, and CAS, have been investigated. Graphene yielded from biomass precursors exhibits properties similar to those from conventional sources. Green reduction of graphene oxide is carried out mostly by plant extracts from fruits, leaves, and other parts, which contain a high concentration of phenolic compounds. The as-prepared bio-waste and green-reduced graphene alternatives were applied in wastewater treatment, electrochemical storage devices, and metal ion sensors. In some cases, graphene showed significantly better performance than previous carbon-based nanomaterials reported in the literature. Despite being in its early stages of development, green-synthesized graphene has demonstrated great potential. As the interest in the development of sustainable alternatives continues to grow, future graphene research is expected to aim for this new line of research. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Superhydrophobic and supercapacitive reduced graphene oxide/fluoropolymer nanocoating on polyester fabric via spray mist coating(Elsevier BV, 2025-07-05)Graphene oxide (GO) has attracted significant attention due to its unique structure and wide applications in fields such as renewable energy, microelectronics, and biotechnology. However, the combination of superhydrophobicity and supercapacitance in a single textile coating remains largely unexplored, representing a critical gap in current research. This study addresses this gap by developing a multifunctional nanocoating applied to polyester fabric using reduced graphene oxide (RGO) and a fluoropolymer (FP) via a spray mist coating technique. GO was synthesized by the Hummers and Hoffman method and reduced with environmentally friendly glucose. Structural and morphological modifications were confirmed through XRD, RAMAN, FTIR, XPS, and SEM-FEG analyses. The resulting nanocoated fabrics exhibited exceptional water repellency with contact angles exceeding 150°, enhanced washing, and abrasion resistance. A Box-Behnken design optimized key process parameters (RGO/FP ratio, curing temperature, and time) to achieve peak performance at a contact angle of 160° with a 1:5 ratio (RGO/FP), a curing temperature of 125°C, and a curing time of 2 minutes. Furthermore, the functionalized polyester fabric demonstrated a remarkable specific capacitance of 305.88 F/g, surpassing results from comparable studies and making it suitable for wearable supercapacitor applications. Durability tests revealed stable superhydrophobicity and structural integrity after five wash cycles, equivalent to 25 home washes. SEM-FEG analysis highlighted nanocoating-induced roughness, enhancing the lotus effect, while electrochemical evaluations indicated notable improvements in conductivity and energy storage. This environmentally friendly spray mist coating technique offers a scalable and sustainable approach for creating multifunctional textiles, paving the way for advanced applications in smart fabrics and flexible electronics.Scopus© Citations 8 2