Technology Category/Market
Categories: Micro & Nano Technology, Environmental Engineering
Industry: Water Treatment & Desalination Industry, Environmental Technology, Chemical Engineering, Nanotechnology, Catalysis, Renewable Energy, Biotechnology & Medical Industry, Pharmaceutical, Cosmetics & Personal Care Industries.
Applications: Water Desalination & Disinfection, Sensors, Energy Storage, Photocatalysis, Anti-bacterial Applications, Environmental Remediation, Advanced Materials, Nano-filtration.
Market: The global market for Ultraviolet (UV) Disinfection estimated at US $ 4.7 B in 2022, is projected to reach a revised size of US $ 12.9 B by 2030, growing at 13.4% CAGR in 2022-2030.
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Problem Statement
- 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.
Technology
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;Â
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.
Key Features/Value Proposition
Enhanced Water Interaction:
- Nanopores in MoS2 nanosheets increase surface area and reactivity.
- This boosts efficiency in water treatment by improving interactions with water molecules.
Improved Contaminant Removal:Â Â
- Defect-rich nanoporous structure enhances surface reactivity. This aids in removing contaminants from water, making it cleaner. The result showed 100% disinfection after 5 cycles (Refer Fig 3).
Controlled Nanopore Formation:Â Â
- Electrosprayed Ag ions create controlled nanopores in nanosheets. Adjusting deposition time customizes pore sizes for various applications.
Versatile Applications:
- Customizable nanopore size suits diverse industrial needs like in catalysis, sensing, and energy storage, beyond water treatment.
Sustainable Water Disinfection:Â Â
- Using visible light aligns with sustainable practices.
- Disinfection method meets environmental regulations and benefits nature and health.
Relevance to Industry Challenges:
- Addressing water scarcity and pollution aligns with industry challenges. The technology’s potential solutions make it more significant.
Industrial Feasibility:Â Â
- Process’s efficiency holds industrial promise.
- Scalability makes it suitable for large-scale water treatment.
Cost-Effectiveness and Simplicity:Â Â
- Affordability and simplicity benefit industrial adoption. The process is cost-effective, easy, and works in regular temperatures.
Refer Fig 1, 2, and 3
Questions about this Technology?
Contact for Licensing
Research Lab
Prof. Pradeep T
Department of Chemistry
Intellectual Property
IITM IDF No: 1589
IP Grant No: 356015
Technology Readiness Level
TRL-4
Technology Validated in Lab
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