Titania-carbon dot-reduced graphene oxide composites, their make, and use
AssigneeImam Abdulrahman Bin Faisal University
InventorsHanan Hussein Amin Mohamed, Aamerah Abdulwahab Alsanea
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Abstract
Catalytic pyrolysis can upcycle waste, e.g., car bumpers, to carbon nanomaterials, preferably using synthetic TiO2 nanoparticles as catalyst during pyrolysis. Analysis of the carbon nanomaterials shows that, while RGO is produced from thermal pyrolysis of car bumper waste absent TiO2, RGO spotted with carbon dots is produced in presence of TiO2 catalyst. Rutile to anatase TiO2 phase transformation and carbon nanomaterial formation can simultaneously occur during the pyrolysis. Anatase to rutile transformation may occur while TiO2 absent the bumper material. Such TiO2-CD-RGO can be used, for example in photocatalytic degradation of organic compounds, such as methylene blue.
Claims20
A method of upcycling vehicle exterior waste, the method comprising:
- pyrolyzing an organic polymer-comprising waste material and TiO2 particles in an inert atmosphere at a temperature in the range of 500 to 900° C., to thereby obtain a composite comprising reduced graphene oxide, 10 to 50 wt. %, based on total composite weight, of TiO2, and carbon dots on the reduced graphene oxide.
A composition, comprising:
- reduced graphene oxide sheets and/or plates;
- 10 to 50 wt. %, based on total composition weight, of TiO2 particles dispersed in and/or on the reduced graphene oxide sheets and/or plates,
- wherein at least a portion of the graphene oxide is decorated with carbon dots, and
- wherein the TiO2 particles comprise TiO2 in anatase phase.
Dependencies are inferred from the claim text.