Graphene-based nanostructures as catalysts for wet peroxide oxidation treatments: From nanopowders to 3D printed porous monoliths
This paper explores the catalytic behaviour of different graphene-based nanostructures for the treatment of wastewater using Catalytic Wet Peroxide Oxidation (CWPO) processes. In a first stage, graphene-based nanopowders with distinct physical-chemical characteristics are tested in the CWPO of pheno...
| Authors: | , , , , , |
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| Format: | article |
| Publication Date: | 2020 |
| Country: | España |
| Institution: | Universidad Autónoma de Madrid |
| Repository: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Language: | English |
| OAI Identifier: | oai:repositorio.uam.es:10486/717812 |
| Online Access: | http://hdl.handle.net/10486/717812 https://dx.doi.org/10.1016/j.cattod.2019.06.026 |
| Access Level: | Open access |
| Keyword: | 3D printing catalytic wet peroxide oxidation graphene monolith robocasting Química |
| Summary: | This paper explores the catalytic behaviour of different graphene-based nanostructures for the treatment of wastewater using Catalytic Wet Peroxide Oxidation (CWPO) processes. In a first stage, graphene-based nanopowders with distinct physical-chemical characteristics are tested in the CWPO of phenol using the following standard operating conditions: [Phenol]0 = 1 g·L−1, [H2O2]0 = 5 g L−1 and 80 °C. Graphene nanoplatelets with the lowest oxygen content exhibit the highest catalytic activity. The typical phenol oxidation by-products are detected in the liquid phase while CO and CO2 appear in the gas phase. Afterwards, three dimensional (3D) porous graphene monoliths (D ∼ 11.5 mm, H ∼ 4 mm, Dopen ∼ 0.68 mm and δw =0.36 cm, 75 cells·cm−2, εgraphene skeleton = 41%) based on those nanoplatelets are additive manufactured using a direct ink writing technique and, then, tested under similar CWPO conditions. The results evidence that the 3D graphene-based structures are catalytically active, though they undergo a prog |
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