• Water scarcity is a global concern, and finding efficient methods for water purification and disinfection is crucial.
• Traditional disinfection methods often involve use of chemicals or UV light, which can have many drawbacks and in some cases it can make the water harmful for consuming.
• Old methods could not be adapted for large-scale industrial applications. The scalability is important for addressing real-world water treatment challenges, as large volumes of water need to be treated efficiently.
• Existing methods for introducing nanopores in MoS2 nanosheets often involve complex and sophisticated instrumentation, making them expensive and difficult to scale up.
• Thus, an invention is needed to address challenges in water treatment, that offers a simpler & more cost-effective method for introducing nanopores in MoS2 nanosheets, contribute to advancements in nanomaterials, and potentially provide more environmentally friendly water disinfection way.

The present patent discloses a method that addresses above mentioned issues.

The present Patent discloses a method of making nanoscale holes in a two dimensional MoS2 nanosheets, the method comprising:

• Electrospray deposition (under ambient conditions) of reactive Ag+ ions onto a 2D MoS2 nanosheets, wherein the Ag+ ions react with the sulfur atoms on the basal plane of MoS2 nanosheets forming Ag2S, resulting in a defect-rich MoS2 nanosheets; 

Wherein

• The Mo rich edges of the said nanoscale holes in MoS2 nanosheet generates H2O2 under visible light for disinfection of water efficiently.
• Ag+ ions are selected from various salts of Ag including but not limited to silver acetate, silver nitrate, and silver perchlorate.
• Chemical drilling with metal ions make MoS2 nanosheet photocatalytically active, which increases reactive oxygen species generation
• The nanoporous MoS2 nanosheets supported on silica, alumina is used as a device for filtration and as a membrane for desalination of water.
• The metal ions for chemical etching are supplied as droplets in the gas phase onto the 2D nanosheets supported on a substrate.