Water technology

Click for the report submitted to the Mashelkar Committee, Ministry of Drinking Water and Sanitation, Government of India

  1. Scalable drop-to-film condensation on a nanostructured hierarchical surface for enhanced humidity harvesting, Ankit Nagar, Ramesh Kumar, Pillalamarri Srikrishnarka, Tiju Thomas and Thalappil Pradeep, ACS Appl. Nano Mater., 4 (2021) 1540-1550. (DOI: 10.1021/acsanm.0c03032   PDF File  Supporting Information
  2. A covalently integrated reduced graphene oxide-ion-exchange resin electrode for efficient capacitive deionization, Md Rabiul Islam, Soujit Sen Gupta, Sourav Kanti Jana, Pillalamarri Srikrishnarka, Biswajit Mondal, Sudhakar Chennu, Tripti Ahuja, Amrita Chakraborty and Thalappil Pradeep, Adv. Mater. Interfaces, 8 (2020) 2001998. (DOI: 10.1002/admi.202001998   PDF File  Supporting Information
  3. Smartphone-based fluoride-specific sensor for rapid and affordable colorimetric detection and precise quantification at sub-ppm levels for field applications, Sritama Mukherjee, Manav Shah, Kamalesh Chaudhari, Arijit Jana, Chennu Sudhakar, Pillalamarri Srikrishnarka, Md Rabiul Islam, Ligy Philip and Thalappil Pradeep, ACS Omega, 5 (2020) 25253–25263. (DOI: 10.1021/acsomega.0c03465   PDF File  Supporting Information
  4. Clean water through nanotechnology: Needs, gaps, and fulfillment, Ankit Nagar and Thalappil Pradeep, ACS Nano, 14 (2020) 6420–6435 (DOI: 10.1021/acsnano.9b01730   PDF File Cover Page   Journal Site
  5. Arsenic toxicity: Carbonate’s counteraction revealed, Swathy Jakka Ravindran, Shantha Kumar Jenifer, Jayashree Balasubramanyam, Sourav Kanti Jana, Subramanian Krishnakumar, Sailaja Elchuri, Ligy Philip, and Thalappil Pradeep, ACS Sustainable Chem. Eng., 8 (2020) 5067-5075. (DOI: 10.1021/acssuschemeng.9b06850   PDF File  Supporting Information
  6. Nanocellulose reinforced organo-inorganic nanocomposite for synergistic and affordable defluoridation of water and an evaluation of its sustainability metrics, Sritama Mukherjee, Haritha Ramireddy, Avijit Baidya, A. K. Amala, Chennu Sudhakar, Biswajit Mondal, Ligy Philip, and Thalappil Pradeep, ACS Sustainable Chem. Eng., 8 (2019) 139–147. (DOI: 10.1021/acssuschemeng.9b04822  PDF File  Supporting Information
  7. Waterborne fluorine-free superhydrophobic surfaces exhibiting simultaneous CO2 and humidity sorption, Avijit Baidya, Anagha Yatheendran, Tripti Ahuja, Chennu Sudhakar, Sarit Kumar Das, Robin H.A. Ras and Thalappil Pradeep, Adv. Mater. Interfaces, 6 (2019) 1901013. (DOI: 10.1002/admi.201901013   PDF File  Supporting Information
  8. Highly-sensitive As3+ detection using electrodeposited nanostructured MnOx and phase evolution of the active material during sensing, Tanvi Gupte, Sourav Kanti Jana, Jyoti Sarita Mohanty, Pillalamarri Srikrishnarka, Sritama Mukherjee, Tripti Ahuja, Chennu Sudhakar, Tiju Thomas, and Thalappil Pradeep, ACS Appl. Mater. Interfaces, 11 (2019) 28154−28163. (DOI: 10.1021/acsami.9b06023   PDF File  Supporting Information
  9. Geologically-inspired monoliths for sustainable release of essential minerals into drinking water, Swathy Jakka Ravindran, Ananthu Mahendranath, Srikrishnarka Pillalamarri, Anil Kumar Avula, Md Rabiul Islam, Sritama Mukherjee, Ligy Philip, and Thalappil Pradeep, ACS Sustainable Chem. Eng., 7 (2019) 11735-11744. (DOI: 10.1021/acssuschemeng.9b01902)   PDF File  Supporting Information
  10. Sustainable and affordable composites built using microstructures performing better than nanostructures for arsenic removal, Sritama Mukherjee, Avula Anil Kumar, Chennu Sudhakar, Ramesh Kumar, Tripti Ahuja, Biswajit Mondal, Pillalamarri Srikrishnarka, Ligy Philip and Thalappil Pradeep, ACS Sustainable Chem. Eng., 7 (2018) 3222–3233. (DOI: 10.1021/acssuschemeng.8b05157)   PDF File  Supporting Information
  11. Holey MoS2 nanosheets with photocatalytic metal rich edges by ambient electrospray deposition for solar water disinfection, Depanjan Sarkar, Biswajit Mondal, Anirban Som, Swathy Jakka Ravindran, Sourav Kanti Jana, C. K. Manju and Thalappil Pradeep, Global Challenges, (2018) 1800052. (DOI: 10.1002/gch2.201800052)   PDF File  Supporting Information    Cover Page   Journal Site
  12. Patterned nanobrush nature mimics with unprecedented water harvesting efficiency, Depanjan Sarkar, Anindita Mahapatra, Anirban Som, Ramesh Kumar, Ankit Nagar, Avijit Baidya and Thalappil Pradeep, Adv. Mater. Interfaces, (2018) 1800667. (DOI: 10.1002/admi.201800667)  PDF File  Supporting Information
  13. Species-specific uptake of arsenic on confined metastable 2-line ferrihydrite: A combined Raman-XPS investigation of the adsorption mechanism, Chennu Sudhakar, Avula Anil Kumar, Radha Gobinda Bhuin, Soujit Sen Gupta, Ganapati Natarajan, and Thalappil Pradeep, ACS Sustainable Chem. Eng., 6 (2018) 9990-10000. (DOI: 10.1021/acssuschemeng.8b01217)   PDF File  Supporting Information
  14. Rapid reaction of MoS2 nanosheets with Pb2+ and Pb4+ ions in solution, Biswajit Mondal, Ananthu Mahendranath, Anirban Som, Sandeep Bose, Tripti Ahuja, Avula Anil Kumar, Jyotirmoy Ghosh and Thalappil Pradeep, Nanoscale, 10 (2017) 1807-1814. (DOI: 10.1039/c7nr07523e)   PDF File  Supporting Information
  15. Early detection of biofouling on water purification membranes by ambient ionization mass spectrometry imaging, Swathy Jakka Ravindran, Ramesh Kumar, Amitava Srimany, Ligy Philip and Thalappil Pradeep, Anal. Chem., 90 (2017) 988–997. (DOI: 10.1021/acs.analchem.7b04236 )   PDF File  Supporting Information
  16. Confined metastable 2-line ferrihydrite for affordable point-of-use arsenic free drinking water, Anil Kumar Avula, Anirban Som, Paolo Longo, Chennu Sudhakar, Radha Gobinda Bhuin, Soujit Sen Gupta, Anshup, Mohan Udhaya Sankar, Amrita Chaudhary, Ramesh Kumar and Thalappil Pradeep, Adv. Mater., 29 (2016) 1604260. (DOI: 10.1002/adma.201604260)   PDF File  Supporting Information
  17. Unusual reactivity of MoS2 nanosheets, Biswajit Mondal, Anirban Som, Indranath Chakraborty, Ananya Baksi, Depanjan Sarkar and Thalappil Pradeep, Nanoscale, 8 (2016) 10282–10290. (DOI: 10.1039/c6nr00878j)  PDF File  Supporting Information
  18. Extraction of silver by glucose, Ananya Baksi, Mounika Gandi, Swathi Chaudhari, Soumabha Bag, Soujit Sen Gupta and Thalappil Pradeep, Angew. Chem. Int. Ed., 55 (2016) 7777 –7781. (DOI: 10.1002/anie.201510122)  PDF File  Supporting Information
  19. Metallic nanobrushes made using ambient droplet sprays, Depanjan Sarkar, M. K. Mahitha, Anirban Som, Anyin Li, Michael Wleklinski, R. G. Cooks and Thalappil Pradeep, Adv. Mater., 28 (2016) 2223–2228. (DOI: 10.1002/adma.201505127PDF File Supporting Information
  1. Rapid dehalogenation of pesticides and organics at the interface of reduced graphene oxide-silver nanocomposite, Dibyashree Koushik, Soujit Sen Gupta, Shihabudheen M. Maliyekkal and Thalappil Pradeep, J. Haz. Mater., 308 (2016) 192-198. (DOI: 10.1021/acsami.5b05510)  PDF File  Supporting Information
  2. Cellulose derived graphenic fibers for capacitive desalination of brackish water, Nalenthiran Pugazhenthiran, Soujit Sen Gupta, Anupama Prabhath, Muthu Manikandan, Jakka Ravindran Swathy, V. Kalyan Raman and Thalappil Pradeep, ACS Appl. Mater. Interfaces, 7 (2015) 20156-20163. (DOI: 10.1021/acsami.5b05510)  PDF File  Supporting Information
  3. Simultaneous dehalogenation and removal of persistent halocarbon pesticides from water using graphene nanocomposites: A case study of lindane, Soujit Sen Gupta, Indranath Chakraborty, Shihabudheen M. Maliyekkal, Tuhina A. Maark, Dheeraj K. Pandey, Sarit K. Das and Thalappil Pradeep, ACS Sustainable Chem. Eng., 3 (2015) 1155-1163. (DOI: 10.1021/acssuschemeng.5b00080 )   PDF File  Supporting Information
  4. Approaching sensitivity of tens of ions using atomically precise cluster-nanofiber composites, Atanu Ghosh, Vedhakkani Jeseentharani, Mohd Azhardin Ganayee, Rani Hemalatha, Kamalesh Chaudhari, Cherianath Vijayan and Thalappil Pradeep, Anal. Chem., 86 (2014) 10996–11001. (DOI: 10.1021/ac502779r )   PDF File Supporting Information
  5. Facile and rapid synthesis of dithiol-protected Ag7 quantum cluster for selective adsorption of cationic dyes, M. S. Bootharaju and Thalappil Pradeep, Langmuir, 29 (2013) 8125-8132. (DOI: 10.1021/la401180r)  Pdf File Supporting Information
  6. Biopolymer reinforced synthetic granular nanocomposites for affordable point-of-use water purification, M. Udhaya Sankar, Sahaja Aigal, Amrita Chaudhary, Anshup, Shihabudheen M. Maliyekkal, A. Anil Kumar, Kamalesh Chaudhari and Thalappil Pradeep, Proc. Natl. Acad. Sci., 110 (2013) 8459-8464. (DOI: 10.1073/linas.1220222110)  Pdf File Supporting Information
  7. Immobilized graphene-based composite from asphalt: Facile synthesis and application in water purification, T. S. Sreeprasad, Soujit Sen Gupta, Shihabudheen M. Maliyekkal and Thalappil Pradeep, J. Hazard. Mater., 246-247 (2013) 213-220. (DOI:10.1016/j.jhazmat.2012.12.022)  Pdf File Supporting Information
  8. Atomically precise silver clusters for efficient chlorocarbon degradation, M. S. Bootharaju, G. K. Deepesh, T. Udayabhaskararao and Thalappil Pradeep, J. Mater. Chem. A, 1 (2013) 611-620. (DOI:10.1039/C2TA00254J)  Pdf File Supporting Information
  9. Graphene: A reusable substrate for unprecedented adsorption of pesticides, Shihabudheen M. Maliyekkal, T. S. Sreeprasad, Deepti Krishnan, Summayya Kouser, Abhishek Kumar Mishra, Umesh V. Waghmare and Thalappil Pradeep, Small, 9 (2013) 273-283. (DOI: 10.1002/smll.201201125 )  Pdf File Supporting Information
  10. Graphene from sugar and its application in water purification, Soujit Sen Gupta, Theruvakkattil Sreenivasan Sreeprasad, Shihabudheen Mundampra Maliyekkal, Sarit Kumar Das and Thalappil Pradeep, ACS Appl. Mater. Interfaces, 4 (2012) 4156-4163. (DOI: 10.1021/am300889u)  Pdf File Supporting Information
  11. Selective visual detection of TNT at the sub-zeptomole level, Ammu Mathew, P. R. Sajanlal, and Thalappil Pradeep, Angew. Chem. Int. Ed., 51 (2012) 9596-9600. (DOI: 10.1002/anie.201203810)  Pdf File Supporting Information
  12. Understanding the degradation pathway of the pesticide, chlorpyrifos by noble metal nanoparticles, M. S. Bootharaju and Thalappil Pradeep, Langmuir, 28 (2012) 2671-2679. (DOI: 10.1021/la2050515)  Pdf File Supporting Information
  13. Luminescent sub-nanometer clusters for metal ion sensing: A new direction in nanosensors, Indranath Chakraborty, T. Udayabhaskara Rao and Thalappil Pradeep, J. Hazard. Mater., 211-212 (2012) 396-403. (DOI:10.1016/j.jhazmat.2011.12.032)  Pdf File Supporting Information
  14. Investigation into the reactivity of unsupported and supported Ag7 and Ag8 clusters with toxic metal ions, M. S. Bootharaju and Thalappil Pradeep, Langmuir, 27 (2011) 8134-8143. (DOI: 10.1021/la200947c)  Pdf File Supporting Information
  15. A practical silver nanoparticle-based adsorbent for the removal of Hg2+ from water, E. Sumesh, M. S. Bootharaju, S. Anshup and Thalappil Pradeep, J. Hazard. Mater., 189 (2011) 450-457. (DOI: 10.1016/j.jhazmat.2011.02.061)  Pdf File Supporting Information
  16. Uptake of toxic metal ions from water by naked and monolayer protected silver nanoparticles: An X-ray photoelectron spectroscopic investigation, M. S. Bootharaju and Thalappil Pradeep, J. Phys. Chem. C, 114 (2010) 8328 – 8336. (DOI: 10.1021/jp101988h)  Pdf File Supporting Information
  17. Towards a practical solution for removing inorganic mercury from drinking water using gold nanoparticles, K. P. Lisha, Anshup and Thalappil Pradeep, Gold Bulletin, 42 (2009) 144-152. DOI: 10.1007/BF03214924)  Pdf File
  18. Noble metal nanoparticles for water purification: A critical review, Thalappil Pradeep and Anshup, Invited critical review, Thin Solid Films, 517 (2009) 6441-6478. (DOI: 10.1016/j.tsf.2009.03.195)  Pdf File
  19. Extraction of chlorpyrifos and malatheon from water by metal nanoparticles, A. Sreekumaran Nair, T. Pradeep, J. Nanoscience and Nanotechnology., 7 (2007) 1-7. (DOI: 10.1166/jnn.2007.733)   PDF File
  20. Potential of silver nanoparticle-coated polyurethane foam as an antibacterial water filter, Prashant Jain and T. Pradeep, Biotechnol Bioeng., 90 (2005) 59-63. (DOI: 10.1002/bit.20368)  PDF File
  21. Halocarbon mineralization and catalytic destruction by metal nanoparticles, A. Sreekumaran Nair and T. Pradeep, Current Science, 84 (2003) 1560-1564. Link  PDF File
  22. Detection and extraction of endosulfan by metal nanoparticles, A. Sreekumaran Nair, Renjis T. Tom, and T. Pradeep, J. Environ. Monitoring., 5 (2003) 363-365. (DOI: 10.1039/B300107E)  PDF File

Links on the patent numbers will take to the complete specifications​

Patents in italics have been used for deploying solutions

Indian patents Granted

  1.  Method of preparing drinking water with pesticide content 0.1 PPM and below and drinking water prepared by the said method, T. Pradeep and A. Sreekumaran Nair, Application no. 51/CHE/2004, dated January 22, 2004, issued as patent no. 200767, dated June 2, 2006.
  2. Polyurethane foam coated with silver nanoparticles, Prashant Jain and T. Pradeep, application no 891/CHE/2004, issued as patent no. 219111, dated April 24, 2008.
  3.  AMRIT drinking water purifier, design patent application no. 257312, dated October 09, 2013, issued on December 16, 2014.
  4.  On-line water purifier for hand pumps, design patent application no. 271059, dated April 6, 2015, issued on July 12, 2016.
  5.  A method to produce supported noble metal nanoparticles in commercial quantities for drinking water purification, A. Sreekumaran Nair and T. Pradeep, application no. 1879/CHE/2007, dated December 10, 2007, issued as patent no. 277112.
  6.  Gravity-fed axial flow filter block for domestic water purifiers and the method of making the same, T. Pradeep, M. Udhaya Sankar, Anshup and Amrita Chaudhary, application no. 2892/CHE/2010, dated September 30, 2010, issued as patent no. 282257, dated March 31, 2017.
  7.  Anti-gravity water filter cartridge, design patent application no. 260460, dated February 19, 2014, issued on October 18, 2019.
  8. Water purifier, design patent application no. 254443, dated 11, 2013, issued on April 18, 2014.
  9.  Water purification cartridge attached to container, design patent no. TEMP/D-1/5729/2016-KOL, dated October 18, 2016, issued as patent no. 287785, dated June 21, 2019.
  10.  Multilayer organic-templated-boehmite-nanoarchitecture for fluoride removal, T. Pradeep, A. Leelavathi, Amrita Chaudhary, M. Udhaya Sankar and Anshup, application no. 4062/CHE/2011, dated November 24, 2011, issued as patent no. 286929, dated August 31, 2017.
  11.  One container gravity fed storage water purifier, Indian patent application, T. Pradeep, Amrita Chaudhary, M. Udhaya Sankar and Anshup, application no. 1522/CHE/2011, issued as patent no. 293515, dated February 28, 2018.
  12. A method of preparing self-assembled manganese-zinc oxide nanosheet granular composite for pathogens and heavy metals free water, Amrita Chaudhary, T. Saraladevi, Shihabudheen M. Maliyekkal, M. Udhaya Sankar, Anshup and T. Pradeep, application no. 2433/CHE/2010, dated August 23, 2010, issued as patent no. 300346, dated August 28, 2018.
  13. Removal of pesticides from water using graphenic materials, T. Pradeep, Shihabudeen Maliyekkal and T. S. Sreeprasad, application no. 3587/CHE/2011, dated October 19, 2011, issued as patent no. 302262, dated October 17, 2018.
  14. Method of extraction of silver by glucose, T. Pradeep, Ananya Baksi, Mounika Gandi, Swathi Chaudhari, Soumabha Bag, application no. 6730/CHE/2014, dated December 30, 2014; full specification filed on December 28, 2015, issued as patent no. 302630, dated October 30, 2018.
  15.  A sustained silver release composition for water purification, T. Pradeep, Anshup, Amrita Chaudhary, Udhaya Sankar, and S. Gayathri, application no. 947/CHE/2011, dated March 25, 2011, issued as patent no. 286423, dated August 18, 2017.
  16. Domestic water purification unit, design patent application no. 288810, issued on October 16, 2017.
  17. Reduced graphene oxide-based composites for the purification of water, T. Pradeep, M. M. Shihabudheen and T.S. Sreeprasad, application no. 2563/CHE/2010, dated September 3, 2010, issued as 291052, dated December 26, 2017.
  18. A method for preparing of monolayer protected silver clusters as antibacterial agents, T. Pradeep, Indranath Chakraborty, Udayabhaskararao Thumu and G. K. Deepesh, application no. 485/CHE/2013, dated February 4, 2013, issued as patent no. 303077, dated November 13, 2018.
  19. Dechlorination of lindane and its removal from water using graphene nanocomposites, T. Pradeep, Soujit Sengupta, Indranath Chakraborty and Shihabudheen M. Maliyekkal, application no. 5988/CHE/2013, dated December 20, 2013, issued as patent no. 304213, dated December 7, 2018.
  20.  Water filled organic templated metal oxide/hydroxide/oxyhydroxide particle network for water purification and a device thereof, T. Pradeep, M. Udhaya Sankar, Amrita Chaudhary, A. Anil Kumar, Anshup, application no. 525/CHE/2013, issued as patent no. 304463, dated December 14, 2018.
  1. Removal of fluoride, alkalinity, heavy metals and suspended solids simultaneously adsorbent synthesis, adsorbent composition and a device for affordable drinking water, Shihabudheen M. Maliyekkal, Anshup and T. Pradeep, application no. 2082/CHE/2009/, dated July 2009, issued as patent no. 313917, dated June 10, 2019.
  2.  Composition for sustained release of carbonate and a water purification device based on the same with enhanced biocidal activity, T. Pradeep, J. R. Swathy, N. Pugazhendran, application no. 7026/CHE/2015, dated December 29, 2015, issued as patent no. 314266, dated June 17, 2019.
  3.  A granulation composition for powder ingredients, T. Pradeep, A. Anil Kumar, M. Udhaya Sankar, Amrita Chaudhary, Anshup, application no. 486/CHE/2013, dated February 4, 2013, issued as patent no. 322218, dated October 1, 2019. 
  4.  A composition for enhanced biocidal activity and a water purification device based on the same, Thalappil Pradeep; Mohan Udhaya Sankar; Amrita Chaudhary; Anshup; Aigal Sahaja, application no. 2867/CHE/2013, dated June 28, 2013, issued as patent no. 332218, dated February 17, 2020.
  5. Cellulose derived graphenic fibers for capacitive desalination of brackish water and preparation method of the electrode thereof, Thalappil Pradeep; Nalenthiran Pugazhenthiran; Soujit Sen Gupta; Anupama Prabath; Jakka Ravindran Swathy, application no. 3951/CHE/2015, dated July 31, 2015, issued as patent no. 335882, dated April 23, 2020.
  6.  A method for preparing cellulose microstructures-templated nanocomposites with enhanced arsenic removal capacity, Thalappil Pradeep; Sritama Mukherjee, application no. 201641044817, dated December 26, 2016, issued as patent no. 337979, dated June 4, 2020.
  7. An enhanced carbon dioxide sorbent nanofiber membrane and a device thereof , T. Pradeep, Anangha Yatheendran, Ramesh Kumar and Arun Karthik, application no. 201841031076, dated August 20, 2018, issued as patent no. 323314, dated August 4, 2020.
  8. Cellulose nanocrystal templated iron oxyhydroxide based adsorbent for arsenic removal from water and a device thereof, T. Pradeep, Avijit Baidya, Bibhuti Bhusan Rath and A. Anil Kumar, application no. 201641027660, dated August 12, 2016, issued as patent no. 343818, dated August 10, 2020.
  9. An integrated CDI electrode, T . Pradeep , Md Rabiul Islam, Soujit Sengupta, Srikrishnarka Pillalamarri, application no. 201741047400, dated December 30 , 2017. issued as patent no. 345270, dated August 27, 2020.
  10.  Organic-templated-boehmite-nanoarchitecture: An adsorbent composition to remove arsenic and fluoride from drinking water, T. Pradeep, Shihabudheen M. Maliyekkal, Anshup, M. Udhaya Sankar and Amrita Chaudhary, application no. 1529/CHE/2010, dated June 3, 2010, issued as patent no. 346000, dated September 3, 2020.  
  11. A method for removing inorganic mercury from drinking water, T. Pradeep, Kinattukara Parambil Lisha, Anshup, application no. 169/CHE/2009, dated January 27, 2009, issued as patent no. 349961, dated October 23, 2020.
  12. Chitosan reinforced mixed oxide nanocomposite for fluoride removal from water and a device thereof, Thalappil Pradeep; Anil Kumar Avula; Bibhuti Bhusan Rath, application no. 201641045048, dated December 30, 2016, issued as patent no. 354374, dated December 23, 2020.
  13. Method for creating nanopores in MoS2 nanosheets by chemical drilling for disinfection of water under visible light, T. Pradeep, Depanjan Sarkar, Anirban Som, Biswajit Mondal and Jakka Ravindran Swathy, application no. 201741037148, dated October 20, 2017, issued as patent no. 356015, dated January 18, 2021.
  14. Removal of lead from waste water using nanoscale MoS2, T. Pradeep, Biswajit Mondal, Ananthu Mahendranath, Anirban Som, Sandeep Bose, Tripti Ahuja, Avula Anil Kumar and Jyotirmoy Ghosh, application no. 201741044447, dated December 11, 2017, issued as patent no. 365164, dated April 22, 2021.

PCT patents Granted

  1.  Extraction of malatheon and chlorpiryhphos from drinking water by nanoparticles adsorbent composition, a device and a method for decontaminating water containing pesticides, A. Sreekumaran Nair and T. Pradeep, PCT application no. PCT/IN2005/000002, issued in USA as patent. no. US7968493 B2; issued in Europe as patent, A method for decontaminating water containing pesticides, EP 1715947; in Germany as DE602005035747 D1, dated October 18, 2012. (corresponding to Indian patent no. 1)
  2. Organic polymer-inorganic fine particle antimicrobial composites and uses thereof, A. Sreekumaran Nair and T. Pradeep, PCT application no. PCT/IB2010/002016, dated Aug. 17, 2010, issued in USA as patent. no. US8268359 B2, dated September 18, 2012; issued in China as patent no.: CN102712463 B, dated December 03, 2014; issued in Japan as patent no.: JP5492301 B2, dated May 14, 2014.
  3.  Organic templated nanometal oxyhydroxide, T. Pradeep, Shihabudheen M. Maliyekkal, Anshup, Udhaya Sankar, Amrita Chaudhary, PCT application no. PCT/IB2011/001551, dated June 2, 2011, issued in UAE for application no. 1238/2012; issued in Japan as JP5908462 B2, dated April 26, 2016; issued in Israel as 223388, dated May 1, 2019.
  4.  Single container gravity-fed storage water purifier, T. Pradeep, Amrita Chaudhary, M. Udhaya Sankar and Anshup, PCT application no. PCT/IB2012/001237, issued in the Japan as JP6109815 B2 for application no. 2014-508886; issued in UAE for application no. 1161/2013; issued in Australia as patent no. AU2012251424 B2, issued in China as patent no. 2012800247893; issued in Israel as patent no. 229223. (corresponding to Indian patent no. 14)
  5. Visual detection of mercury ions, T. Pradeep, Ammu Mathew and P. R. Sajanlal, PCT/IB2012/001543, dated August 10, 2012; issued in China as patent no. CN104335041 B, dated August 24, 2016; issued in USA as patent no. US9733184 B2, dated August 15, 2017.
  6. Coated mesoflowers for molecular detection and smart bar code materials, T. Pradeep, Ravindranathan Sajanlal Panikkanvalappil, PCT application no. PCT/IB2014/61096, dated April 30, 2014, issued in USA as patent no. US9903821 B2, dated February 27, 2018.
  7. Detection of quantity of water flow using quantum clusters, T. Pradeep, Leelavathi A, M. Udhaya Sankar, Amrita Chaudhary, Anshup, T. Udayabhaskararao, PCT application no. PCT/IB2013/01244, dated April 17, 2013, issued in China as patent no. CN104520706 B; issued in USA as patent no. US10041925 B2, dated August 7, 2018; issued in Japan as patent no. JP6367182 B2, dated August 8, 2018; issued in Mexico as patent no. MX362092 B, dated October 7, 2019; issued in Israel as patent no. IL20130235206, dated December 31, 2014.
  1. 08. A composition for enhanced biocidal activity and a water purification device based on the same, T. Pradeep, M. Udhaya Sankar, Amrita Chaudhary, Sahaja Aigal, Swathy JR, Anshup, PCT application no. WO 2015/059562 A1, issued in UAE for the application no. PCT/IB2014/002316, issued in Australia for the application no. AU2014338691, issued in Brazil for the application no. BR11 2015 0323731, issued in Oman for the application no. OM/P/2015/00340, issued in Qatar for the application no. 2867CHE2013. (corresponding to Indian patent no. 30)
  2. 09. A sustained silver release composition for water purification, T. Pradeep, Anshup, Amrita Chaudhary, M. Udhaya Sankar, and S. Gayathri, PCT application no. PCT/IB2012/001079, dated March 25, 2012, issued in Australia as patent no. AU2012241522 B2, dated June 8, 2017; issued in China as patent no. CN103702730 B, dated November 23, 2016; issued in Japan as patent no. JP6188676 B2, dated August 30, 2017. (corresponding to Indian patent no. 18)
  3. 10. Water purification unit, Bhabendra Pradhan, Hiranmayee Vedam, Thalappil Pradeep, Anshup, Amrita, Chaudhary; Udhaya Sankar Mohan, Sahaja Aigal, PCT application no. PCT/US2012/032880 issued in UAE as patent no. 1080/2013, issued in Mexico as patent no. MX347341B; issued in Australia as patent no 2012243079, dated June 15, 2017.
  4. 11. Multilayer organic-templated-boehmite-nanoarchitecture for fluoride removal, T. Pradeep, A. Leelavathi, Amrita Chaudhary, M. Udhaya Sankar and Anshup, PCT application no. PCT/IB2012/002885, issued in Australia as patent no. AU2012342118 B2, dated April 26, 2018; issued in China as patent no. CN104168996 B, dated March 15, 2017; issued in Japan as patent no. JP6336396 B2, dated June 06, 2018; issued in US as patent no. US 10035131 B2, dated July 31, 2018. (corresponding to Indian patent no. 13)



  1. InnoNano Research Private Limited, has established production facilities now and has already delivered orders worth ~$4 million. The technology has reached 600,000 people already.
  2. Safewater Nano Private Limited is a company incorporated in Singapore, to take our water technologies to international markets, at a funding of $18 million.
  3. Innodi Water Technologies Private Limited, started producing capacitive deionization units. Factory for production was inaugurated in December 2017.
  4. Vayujal Technologies Private Limited is developing a 2000 litres per day (LPD) atmospheric water harvesting unit now, which will be installed at Engineers India Limited, Gurugram, Haryana. We have now 30, 100, 400, and 1000 lpd versions of this product.
  1. Aqueasy Innovations Private Limited has been established to create efficient water transport solutions. Its prototypes have been tested.
  2. Hydromaterials Private Limited specializes in development and implementation of advanced technologies such as affordable technology for salt removal from water.
  3. EyeNetAqua Private Limited has been established to commercialise sensors for clean water.



All are co-owned by IIT Madras.