Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
A Method for the Preparation of Immobilized Graphene-based Composite from Asphalt
Categories for this Invention
Category- Environmental Engineering
Industry Classification:
- NIC (2008)- 36000 Water collection, treatment and supply; 28195- Manufacture of filtering and purifying machinery or apparatus for liquids and gases; 37003- Treatment of waste water or sewer by means of physical, chemical or biological processes; 23994- Manufacture of graphite products other than electrical articles
Applications- Water treatment, water purification
Market drivers:
The global graphene market size is projected to grow from $ 570.3 million in 2024 to $ 5,193.2 million by 2032 exhibiting a CAGR of 31.8% during the forecast period
Image Gallery
Problem Statement
- Graphene has great potential in water purification business due to its unique physical and chemical properties including high surface area.
- However, the use of graphenic materials for applications such as water purification is limited mainly due to the difficulty in large-scale synthesis and post treatment-handling.
- Moreover, the preparation of Reduced Graphene Oxide (RGO) involves the use of hazardous chemicals and produces undesirable hazardous products.
- There is a need for a simple, affordable and eco-friendly adsorbent for water purification produced using a simple synthetic route that avoids laborious steps including post-synthesis cleaning.
Technology
- Preparation of graphenic material on sand, starting from asphalt using a single-step strategy to immobilize the graphenic material on sand surface for removal of pollutants from water.
- Asphalt is first treated with Toluene in the ratio 1:10 then the mixture is treated with sand to obtain a second mixture which is subjected to drying and heating at an optimum temperature of 400±5 °C and finally soaked in acid, washed with water and dried to obtain Graphene Sand Composie (GSC)
- The graphene sand composite (GSC) is capable of adsorbing rhodamine-6G and chlorpyrifos, a dye and a pesticide respectively, and decontaminating water from such pollutants
- Following batch adsorption experiments the filtrate was analyzed to quantify the target molecule R6G in the aqueous phase by UV Nis spectrophotometer based on absorbance at 527 nm. Analysis of CP was carried out at a wavelength of 297 nm. The effect of particle size, contact time, and adsorbent dose were evaluated by varying the parameters in the appropriate window.
Key Features / Value Proposition
- The process uses cheap and locally available asphalt As raw material. While using a simple strategy to immobilize the graphenic material on sand surface.
- The developed adsorbent surface is characterized by absence of oxygen functionalities. Avoiding such functionalities is highly desirable as it helps in reducing water solubility and improving the ease of regeneration of the adsorbent. Whereas, conventional adsorbents require laborious processes to regenerate.
- The developed GSC exhibits superior performance in removing pollutants from water when compared to conventional RGO@RS and GSC750 adsorbents.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Pradeep T
Department of Chemistry
Intellectual Property
- IITM IDF Ref. 881
- IN 393415 Patent Granted
Technology Readiness Level
TRL 4
Technology Validated in Lab