Dr. Biswajit Choudhury


My research interests fall in the use of semiconductor nanomaterials for optoelectronics and energy applications. I have an insatiable desire to be actively involved in the following research areas—
1. Plasmonics for Energy Conversion
2. Defect Engineering in Semiconductor Nanostructures
3. Fluorescent Nanomaterials


  1. Ph.D. Tezpur University (2014)                                                                                                                                                              “Investigation of optical and magnetic properties of pristine and doped TiO2 nanoparticles” (Supervisor: Prof. Amarjyoti Choudhury)
  2. MSc. Tezpur University (2008)
  3. B.Sc. Gauhati University (2005)


1. Assistant Professor-II (July 2019-present)                                                                             
Physical Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, India

2.DST INSPIRE Faculty (March 2016-July 2019)                                                                                 
Institute of Advanced Study in Science and Technology, Guwahati, India                                                 
Metal oxide-carbon based hybrid nanomaterials for photocatalytic application

Research Experience

1.Institute Postdoctoral Fellow (Sept 2014-March 2016)                                                                 
Indian Institute of Technology Guwahati, Guwahati, India
Graphitic carbon nitride and graphene for photocatalytic applications (Supervisor: Prof. PK Giri)

2.DST Research Associate (March 2014-August 2014)                                                                       
Tezpur University, Tezpur, India,                                                                                             
Defect mediated ferromagnetism in metal oxide and defects manipulation for photocatalysis
 (Supervisor: Prof. A. Choudhury)

3.Visiting Research Fellow (April 2010-June 2010)                                                                       
Jawaharlal Nehru Center for Advanced Scientific Research, Bangalore, India
Interaction of inorganic nanoparticles with Graphene (Supervisor: Prof. CNR Rao)


  1. B. Choudhury, U. Saikia, M.B. Sahariah, A. Choudhury, Vacancy Induced p-Orbital Ferromagnetism in MgO Nanocrystallite. J. Alloys and Compds. 819 (2020) 153060. (I.F. 4.175)
  2. T. Kashyap, S. BiswasiAR Pal, B. Choudhury, Unravelling the Catalytic and Plasmonic Roles of g-C3N4 Supported Ag and Au Nanoparticles Under Selective Photoexcitation, ACS Sustainable Chem.Eng., 7, 23 (2019)19295-19302. (I.F. 6.97)
  3. K. Paul, PK Giri, M. Fuji, H. Ishimata, B. ChoudhuryEvidence for Plasmonic Hot-Electron Injection-induced Superior Visible Light Photocatalysis by g-C3N4 Nanosheets Decorated with Ag-TiO2(B) and Au-TiO2(B) Nanorods, Solar Energy Mater. Sol. Cells. 201 (2019) 110053. (I.F. 6.019)
  4. B. Choudhury, K. Paul, D. Sanyal, A. Hazarika, P.K. Giri, Evolution of Nitrogen- Related Defects in Graphitic Carbon Nitride Nanosheets probed by Positron Annihilation and Photoluminescence Spectroscopy, J. Phys. Chem. C 122 (2018) 9209-9219. (I.F. 4.309)
  5. H Saikia, KK Hazarika, B Chutia, B Choudhury, P Bharali. A Simple Chemical Route toward High Surface Area CeO2 Nanoparticles Displaying Remarkable Radical Scavenging Activity. Chemistry Select 2 (2017) 3369-3375. (I.F. 1.716)
  6. R. Gone, B. Choudhury, P.K. Giri, In-situ decoration of Plasmonic Au Nanoparticles on Graphene Quantum Dots-Graphitic Carbon Nitride Hybrid and Evaluation of its Visible-Light Photocatalytic Performance, Nanotechnology 28 (2017) 395703. (I.F. 3.399)
  7. B. Choudhury, PK Giri, Isotype Heterostructure of Bulk and Nanosheets of Graphitic Carbon Nitride for Efficient Visible-Light Photodegradation of Methylene Blue, RSC Adv. 6 (2016) 24976-24984. (I.F. 3.049). 
  8. RK Biroju, B Choudhury, PK Giri. Plasmon-enhanced strong visible light photocatalysis by defect engineered CVD graphene and graphene oxide physically functionalized with Au Nanoparticles. Catal. Sci. & Technol. 6 (2016) 7101-7112. (I.F. 5.726)
  9. B. Choudhury, S. Bayan, A. Choudhury, P. Chakraborty, Narrowing of Band Gap and Effective Charge Carrier separation in Oxygen-Deficient TiO2 Nanotubes with improved Visible-Light Photocatalytic activity, J. Colloid Interface Sci.465 (2016) 1-10. (I.F. 6.361)
  10. S. Bayan, B. Choudhury, P. Chakraborty, A. Choudhury, A Comprehensive Secondary Ion Mass Spectroscopy analysis of ZnO Nanowalls: Correlation to Photocatalytic Responses, J. Appl. Phys.117 (2015) 095304. (I.F. 2.328)
  11. R. Verma, SK. Samdarshi, S. Bojja, S. Paul, B. Choudhury, A Novel Thermophotocatalyst of Mixed-Phase Cerium Oxide (CeO2/Ce2O3) Homocomposite Nanostructure: Role of Interface and Oxygen Vacancies, Solar Energy Mater. Sol. Cells. 141 (2015) 414-422. (I.F. 6.019)
  12. S. Paul, P. Chetri, B. Choudhury, GA. Ahmed, A. Choudhury, Enhanced Visible-Light Photocatalytic activity of Gd doped Nanocrystalline Titania, J. Colloid and Interface Sci.439 (2015) 54-61. (I.F. 6.361)
  13. B. Choudhury, S. Paul, G.A. Ahmed, A. Choudhury, Adverse Effect of Mn Doping on the Magnetic Ordering in Mn-doped TiO2 Nanoparticles, Mater. Res. Express, 2 (2015) 096104. (I.F. 1.449)
  14. B. Choudhury, P. Chetri, A. Choudhury, Oxygen Defect and Formation of Ce3+ Affecting the Photocatalytic properties of CeO2 Nanoparticles, RSC Adv. 4 (2014) 4663. (I.F. 3.049)
  15. B. Choudhury, A. Choudhury, Oxygen Defect dependent variation of Band gap, Urbach Energy, and Luminescence property of Anatase, Anatase-Rutile Mixed Phase, and Rutile phases of TiO2 Nanoparticles, Physica E 56 (2014) 364-371. (I.F. 3.176)
  16. B. Choudhury, R. Verma, A. Choudhury, Oxygen Defect assisted Paramagnetic to Ferromagnetic conversion in Fe doped TiO2 Nanoparticles, RSC Adv. 4 (2014) 29314-29323. (I.F. 3.049)
  17. B Choudhury, P Basyach, A Choudhury. Monitoring F, F+ and F22+ related intense defect emissions from nanocrystalline MgO. J. Lumin. 149 (2014) 280-286. (I.F. 2.961)
  18. S Paul, B Choudhury, A Choudhury. Magnetic properties study of Gd doped TiO2 nanoparticles. Journal of Alloys and Compd. 601 (2014) 201-206. (I.F. 4.175)
  19. B Choudhury, M Dey, A Choudhury. Shallow and deep trap emission and luminescence quenching of TiO2 nanoparticles on Cu doping. Applied Nanoscience 4 (2014) 339-346. (I.F. 3.198)
  20. P. Chetri, B. Choudhury, A. Choudhury, Room-temperature Ferromagnetism in SnO2 Nanoparticles: An Experimental and Density Functional Study, J. Mater Chem. C 2 (2014) 9294-9302. (I.F. 6.641)
  21. B. Choudhury, A. Choudhury, Room-temperature Ferromagnetism in Defective TiO2 Nanoparticles: Role of Surface and Grain Boundary Oxygen Vacancies, J. Appl. Phys. 114 (2013) 203906. (I.F. 2.328)
  22. B. Choudhury, A. Choudhury, Structural, Optical and Ferromagnetic properties of Cr doped TiO2 Nanoparticles, Mater. Sci. Eng. B. 178 (2013) 794-800. (I.F. 3.507)
  23. B Choudhury, A Choudhury. Structural, optical and ferromagnetic properties of Cr doped TiO2 nanoparticles. Mater. Sci. Eng. B. 178 (2013) 239-247. (I.F. 3.507)
  24. B. Choudhury, A. Choudhury, Oxygen Vacancy and Dopant Concentration-dependent Magnetic properties of Mn-doped TiO2 Nanoparticle, Current Appl. Phys. 13 (2013) 1025-1031. (I.F. 2.010)
  25. B. Choudhury, A. Choudhury, Tailoring Luminescence properties of TiO2 Nanoparticles by Mn Doping, J. Lumin.136 (2013) 339-346(I.F. 2.961)
  26. B. Choudhury, A. Choudhury, Dopant Induced Changes in Structural and Optical properties of Cr doped TiO2 Nanoparticles, Mater. Chem. Phys. 132 (2012) 1112- 1118. (I.F. 2.781)
  27. B. Choudhury, A. Choudhury, Ce3+and Oxygen Vacancy Mediated Tuning of Structural and Optical Properties of CeO2 Nanoparticles, Mater. Chem. Phys. 131 (2012) 666-671. (I.F. 2.781)
  28. B. Choudhury, B. Borah, A. Choudhury, Extending photocatalytic activity of TiO2 Nanoparticles to the Visible Region of Illumination by Doping of Cerium, Photochem Photobiol. 88 (2012) 257-264. (I.F. 2.338)
  29. B Choudhury, A Choudhury. Luminescence Characteristics of Cobalt doped TiO2 nanoparticles. J.Lumin. 132 (2012) 178-184. (I.F. 2.961)
  30. B. Choudhury, A. Choudhury, AKM Maidul Islam, P. Alagarsamy, M. Mukherjee, Effect of Oxygen Vacancy and Dopant concentration on the Magnetic Properties of High Spin Co2+ doped TiO2 Nanoparticles, J. Magn. Magn. Mater. 323 (2011) 440-446. (I.F. 2.683)
  31. B. Das, B. Choudhury, A. Gomathi, A.K. Manna, S.K. Pati, CNR Rao, Interaction of Inorganic Nanoparticles with Graphene, ChemPhysChem 12 (2011) 937-943. (I.F. 3.077)

Book Chapter

1. B. Choudhury, Carbon Nitride-A Wonder Photocatalyst (2019) in edited book-Nanophotocatalysis and Environmental Applications, Springer Nature.
2. B. Choudhury, A. Kalita, Defect Engineered Inorganic Nanomaterials for Supercapacitors (2019) in edited book-Inorganic Nanomaterials for Supercapacitor Design, CRC Press (Taylor and Francis).

DST INSPIRE Faculty Project
Duration: 2016-2021

Ph.D. Students
1. Trishamoni Kashyap (January 2019-)
M.Sc. Physics (2017), Gauhati University
Research Assistant: December 2017-continuing
Institute JRF: February 2020-

2. Manash Pratim Nath (September 2019-)
M.Sc. Physics (2017), Tezpur University
Designation: CSIR-JRF (September 2019-)

3. Manju Kumari Jaiswal (September 2019-)
M.Sc. Physics (2018), University of Science and Technology, Meghalaya
Designation: DST INSPIRE JRF (Sept. 2019-)

4. Suvanakar Deka (February 2020-) 
M.Sc. Physics (2018), University of Science and Technology, Meghalaya
Designation:Institute JRF (February 2020-)

M.Sc./M.Tech Dissertation

  1. Archita Choudhury (Jan-June 2018), M.Tech. in Materials Science and Engineering, GUIST, Guwahati, Assam
  2. Jayanta Talukdar (January-March 2020), M.Sc. in Physics (4th Sem), Kaziranga University, Jorhat, Assam

Summer/Winter Project Trainee

Antarleena Das (Pandu College), Bipanchee Acharya (GUIST), Manash Pratim Sarma (Brahmaputra College), Hrishikesh Sarma (GU)

Interested students to pursue their M.Sc./M.Tech./M.Phill dissertation works can contact me at biswa[dot]tezu[at]gmail[dot]com