Abstract: The embodiments herein provide a facile four-step process for the preparation of binder-free graphene felts that are free standing and mechanically robust. The step of deagglomeration of graphene material leads to a uniform size distribution which when combined/integrated with an appropriate moulding technique allows an easy fine tuning of various attributes of graphene felts including electrical conductivity, porosity, surface area, surface morphology and surface functionalization depending on the desired application. Since graphene felts obtained from this process do not incorporate any binder, to achieve better electrical conductivity, electrochemical activity and catalytic and sensing properties compared to conventional graphene felts while not compromising with their mechanical properties.

Abstract: The embodiments herein provide a system and a method for the synthesis of Graphene Quantum Dots (GQDs) for use in applications like nano-electronics, photonics, bio-imaging, energy storage, quantum computing, etc. Cu substrate is placed inside the CVD tube, and the CVD Chamber is sealed. The process parameters for CVD process are set up. Precursor gases injected inside the tube are dissociate to form carbon dimers and trimmers. Upon cooling semi-cyrstalline carbon film deposits inside the CVD tube. Oxidizing gas mixture is injected to convert amorphous C in semi-cyrstalline carbon film to CO2/CO. Graphene Quantum Dots (GQDs) so formed are carried with the gas flow and deposited at the cooler end of tube. The scrapper assembly is inserted in the CVD Tube and the reagent is sprayed inside the tube to disperse these GQDs in the reagent. This dispersion is pumped out of the CVD Chamber.

Abstract: The embodiments herein provide a filter for cigarette comprising graphene nano-composite based material enclosed in a casing. The filter is reusable and is plugged to any cigarette, or tobacco smoking products. The filter is a stand-alone product or manufactured integrally with each individual cigarette. The filter provides a safe smoking option to tobacco smokers without changing their smoking habits by reducing the tar content and other toxic chemicals in the inhaled smoke. The graphene based nanocomposite filter adsorbs the toxic agents from the smoke (of cigarette, beedi, hookah etc). The filter is fabricated by treating ceramic particles and coating them with carbon particles. The carbon particles are carbonized. The ceramic particles coated with carbon are segregated based on shape and size and treated chemically to convert carbon into graphene under inert conditions. The graphene coated particles are chemically functionalized for improved filtration.