3D oxidized graphene frameworks for efficient nano sieving

Pranav Bhagwan Pawar, Sumit Saxena, Dhanashree Kamlesh Badhe, Raghvendra Pratap Chaudhary, Shobha Shukla

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


The small size of Na+ and Cl- ions provides a bottleneck in desalination and is a challenge in providing alternatives for continuously depleting fresh water resources. Graphene by virtue of its structural properties has the potential to address this issue. Studies have indicated that use of monolayer graphene can be used to filter micro volumes of saline solution. Unfortunately it is extremely difficult, resource intensive and almost impractical with current technology to fabricate operational devices using mono-layered graphene. Nevertheless, graphene based devices still hold the key to solve this problem due to its nano-sieving ability. Here we report synthesis of oxidized graphene frameworks and demonstrate a functional device to desalinate and purify seawater from contaminants including Na+ and Cl- ions, dyes and other microbial pollutants. Micro-channels in these frameworks help in immobilizing larger suspended solids including bacteria, while nano-sieving through graphene enables the removal of dissolved ions (e.g. Cl-). Nano-sieving incorporated with larger frameworks has been used in filtering Na+ and Cl- ions in functional devices.

Original languageEnglish
Article number21150
JournalScientific Reports
StatePublished - 19 Feb 2016
Externally publishedYes

ASJC Scopus subject areas

  • General


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