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Dr. Darbha Venkata Ravi Kumar

Assistant Professor, Department of Chemistry, School of Engineering, Coimbatore Campus

Qualification: BSc, MSc, Ph.D
vrk_darbha@cb.amrita.edu
Research Interest: Materials Chemistry, Nanomaterials, Nucleation-Growth Kinetics, Size and shape-selective synthesis of nanomaterials their characterization and applications, One & two dimensional nanostructures, Development of materials for various photocatalytic applications, Continuous flow synthesis and catalysis

Bio

Dr. Venkata Ravi Kumar Darbha currently serves as an Assistant Professor, Department of Chemistry, School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore Campus

Publications

Journal Article

Year : 2023

Room Temperature Curable Copper Nanowire-Based Transparent Heater

Cite this Research Publication : Darbha V. Ravi Kumar, Aarju Mathew Koshy, Neha Sharma, Neethu Thomas, and Parasuraman Swaminathan*, Room Temperature Curable Copper Nanowire-Based Transparent Heater, ACS Omega 2023, 8, 23, 21107–21112,

Publisher : ACS

Year : 2022

Dip to Drink: Solar Photocatalytic Reduction of Cr(VI) Using Fibrous Red Phosphorus Immobilized Quartz Sand as “Dip-Catalyst”

Cite this Research Publication : Smera, R., Roshith, M., Ramasubramanian, S., Kumar, D.V. R., Dip to Drink: Solar Photocatalytic Reduction of Cr(VI) Using Fibrous Red Phosphorus Immobilized Quartz Sand as “Dip-Catalyst”. J InorgOrganometPolym, 2022, 32, 1800–1809 DOI: https://doi.org/10.1007/s10904-022-02281-5

Publisher : J InorgOrganometPolym

Year : 2022

Impact of iodide ions in the transformation of Cu nanostructures from one-dimensional

Cite this Research Publication : Devika, C., Sahu, P., Kumar, D.V. R., Impact of iodide ions in the transformation of Cu nanostructures from one-dimensional nanowires to two-dimensional microplates Journal of Chemical Sciences, 2022, 134, 64 DOI: https://doi.org/10.1007/s10904- 022-02281-5

Publisher : Journal of Chemical Sciences

Year : 2021

Tuning the structural and luminescence properties of LiYF4: Yb, Er upconversion phosphor: Understanding the role of K ion concentration

Cite this Research Publication : K. Janani, S. Ramasubramanian, DharbaV. Ravikumar, P.Thiyagarajan Tuning the structural and luminescence properties of LiYF4: Yb, Er upconversion phosphor: Understanding the role of K ion concentration Optik 243 167470 (5) 2021

Publisher : Optik

Year : 2021

Biosurfactant-mediated biosynthesis of CuO nanoparticles and their antimicrobial activity

Cite this Research Publication : Athira, K., Lakshmiprasad Gurrala, and Kumar, D.V.R., Biosurfactant-mediated biosynthesis of CuO nanoparticles and their antimicrobial activity. Appl. Nanosci, 2021, 11 (4) 1447-1457

Publisher : Applied Nanoscience

Year : 2021

Fibrous red phosphorus as a non-metallic photocatalyst for the effective reduction of Cr(VI) under direct sunlight

Cite this Research Publication : Athira, T.K., Roshith, M., Babu, T.S. and Kumar, D.V.R., Fibrous red phosphorus as a non-metallic photocatalyst for the effective reduction of Cr (VI) under direct sunlight. Mater. Lett, 2021, 283,128750.

Publisher : Materials Letters

Year : 2021

Continuous flow solar photocatalytic disinfection of E. coli using red phosphorus immobilized capillaries as optofluidic reactors

Cite this Research Publication : Roshith, M., Pathak, A., Kumar, A.N., Anantharaj, G., Saranyan, V., Ramasubramanian, S., Babu, T.S. and Kumar, D.V.R., Continuous flow solar photocatalytic disinfection of E. coli using red phosphorus immobilized capillaries as optofluidic reactors. Appl. Surf. Sci., 2021, 540, 148398.

Publisher : Applied Surface Science

Year : 2020

Evaluation of photocatalytic activity of commercial red phosphorus towards the disinfection of E. coli and reduction of Cr (VI) under direct sunlight

Cite this Research Publication : Athira, T.K., Roshith, M., Kadrekar, R., Arya, A., Kumar, M.S., Anantharaj, G., Gurrala, L., Saranyan, V., TG, S.B. and Darbha, V.R.K., Evaluation of photocatalytic activity of commercial red phosphorus towards the disinfection of E. coli and reduction of Cr (VI) under direct sunlight. Mater. Res. Express, 2020, 7(10), 104002.

Publisher : Mater. Res. Express

Year : 2020

Aggregation induced, formaldehyde tailored nanowire like networks of Cu and their SERS activity

Cite this Research Publication : Athira, K., Ranjana, M., Bharathi, M.S.S., Reddy, B.N., Babu, T.G. S., Rao, S.V. Kumar, D.V.R., Aggregation induced, formaldehyde tailored nanowire like networks of Cu and their SERS activity Chem. Phys. Letters, 2020, 748, 137390

Publisher : Chem. Phys. Letters

Year : 2019

Hydrazine free synthesis of Cu nanostructures: Exploring vitamin-C as environmental benign reducing agent to synthesize Cu nanowires

Cite this Research Publication : Ranjana, M., Babu, T. G. S., Kumar, D.V.R., Hydrazine free synthesis of Cu nanostructures: Exploring vitamin-C as environmental benign reducing agent to synthesize Cu nanowires, J. Indian. Chem. Soc., 2019,36, 121-125

Publisher : J. Indian. Chem. Soc.,

Year : 2019

Urchin-like fibrous red phosphorus as an efficient photocatalyst for solar-light-driven disinfection of E. coli

Cite this Research Publication : Roshith, M., Kumar, M. S., Kumar, A. K. N., Ramasubramanian, S., Stanley, J., Babu, T. G. S., Kumar, D. V. R., Urchin-like fibrous red phosphorus as an efficient photocatalyst for solar-light-driven disinfection of E. coli, J. Photochem. Photobiol. Chem, 2019, 384, 112034

Publisher : J. Photochem. Photobiol. Chem

Year : 2019

Sophorolipid induced hydrothermal synthesis of Cu nanowires and its modulating effect on Cu nanostructures

Cite this Research Publication : M. Ranjana, Ramesh, V. V. E., Dr. Satheesh Babu T. G., and Kumar, D. V. Ravi, “Sophorolipid induced hydrothermal synthesis of Cu nanowires and its modulating effect on Cu nanostructures”, Nano-Structures & Nano-Objects, vol. 18, p. 100285, 2019.

Publisher : Nano-Structures and Nano-Objects

Year : 2018

Synthesis, structural and optical properties of Mn Doped ZnO with its photocatalytic activity

Cite this Research Publication : Gautham, P.; Varma, U. S.; Sreekanth, K. M.; Kumar, D. V. R.; Sreedhar, K. M.; Sivasubramanian, G. Synthesis, Structural and Optical Properties of Mn Doped ZnO with Its Photocatalytic Activity. Asian J. Chem. 2018, 30 (12), 2631–2637

Publisher : Asian Journal of Chemistry

Year : 2015

Promising wet chemical strategies to synthesize Cu nanowires for emerging electronic applications

Cite this Research Publication : Kumar, D.V.R., Woo, K., Moon, J., Promising wet chemical strategies to synthesize Cu nanowires for emerging electronic applications, Nanoscale, 2015, 7, 17195-17210

Publisher : Nanoscale

Year : 2014

Cu (II) – alkyl amine mediated hydrothermal synthesis of Cu nanowires: Exploring the dual role of alkyl amines

Cite this Research Publication : Kumar, D.V.R., Kim, I., Zhong, Z., Kim, K., Lee D., Moon, J., Cu (II) – alkyl amine mediated hydrothermal synthesis of Cu nanowires: Exploring the dual role of alkyl amines, Phys. Chem. Chem. Phys., 2014,16, 22107-22115

Publisher : Phys. Chem. Chem. Phys.,

Year : 2014

Microfluidic platform for continuous flow synthesis of triangular gold nanoplates

Cite this Research Publication : Kumar, D.V.R., Kulkarni, A. A., Prasad, B.L.V., Microfluidic platform for continuous flow synthesis of triangular gold nanoplates, Colloids. Surf A., 2014, 443,149-155

Publisher : Colloids. Surf A

Year : 2013

Impinging jet micromixer for flow synthesis of nanocrystalline MgO: Role of mixing/impingement zone

Cite this Research Publication : Kumar, D.V.R., Prasad, B.L.V., Kulkarni, A. A., Impinging jet micromixer for flow synthesis of nanocrystalline MgO: Role of mixing/impingement zone, Ind.Eng.Chem.Res., 2013, 52, 17376-17382

Publisher : Industrial & Engineering Chemistry Research

Year : 2013

Surfactant free synthesis of anisotropic gold nanostructures: Can dicarboxylic acids alone acts as shape directing agents

Cite this Research Publication : Kumar, D.V.R., Kumavat, S.R, Chamundeswari, V.N., Patra, P.P., Kulkarni, A. A, Prasad, B.L.V., Surfactant free synthesis of anisotropic gold nanostructures: Can dicarboxylic acids alone acts as shape directing agents? RSC Adv., 2013, 3, 21641-21647

Publisher : RSC Advances

Year : 2013

Synthesis of triangular nanoplates: Role of bromide ion and temperature

Cite this Research Publication : Kumar, D.V.R., Kulkarni, A. A., Prasad, B.L.V., Synthesis of triangular nanoplates: Role of bromide ion and temperature, Colloids. Surf A., 2013,422,181-190

Publisher : Colloids and Surfaces A Physicochemical and Engineering Aspects

Year : 2012

Segmented flow synthesis of Ag nanoparticles in spiral microreactor: Role of continuous and dispersed phase

Cite this Research Publication : Kumar, D.V.R., Prasad, B.L.V., Kulkarni, A.A., Segmented flow synthesis of Ag nanoparticles in spiral microreactor: Role of continuous and dispersed phase. Chem.Eng.J., 2012,192,357-368 (Cover page Article)

Publisher : Chem.Eng.J

Year : 2010

Continuous flow synthesis of functionalized silver nanoparticles using bifunctional biosurfactants

Cite this Research Publication : Kumar, D.V.R., Kasture, M.B., Prabhune, A.A., Ramana, C.V., Prasad, B.L.V., Kulkarni, A.A., Continuous flow synthesis of functionalized silver nanoparticles using bifunctional biosuarfactants, Green Chem., 2010,12,609-615

Publisher : Green Chem.,

Conference Paper

Year : 2013

Intelligent control based MPPT method for fuel cell power system

Cite this Research Publication : M. Venkateshkumar, G. Sarathkumar and S. Britto, "Intelligent control based MPPT method for fuel cell power system," 2013 International Conference on Renewable Energy and Sustainable Energy (ICRESE), Coimbatore, India, 2013, pp. 253-257, 2013.

Publisher : IEEE

Patents

Year : 2014

A sol gel process for synthesis of nanocrystalline oxides

Cite this Research Publication : Kumar, D.V.R., Prasad, B.L.V., Kulkarni, A. A., “A sol gel process for synthesis of nanocrystalline oxides” US patent US10106432B2 (granted)

Publisher : US patent

Book

Year : 2021

Continuous flow methods for synthesis of fuctional materials

Cite this Research Publication : Kumar, D.V. R., Patil, S., Kulkarni, A. A., “Continuous flow methods for synthesis of fuctional materials” in Flow Chemistry (Vol. 2): Applications, 2nd edition, De Gruyter, 2021, 69-98; (ISBN: 9783110693614)

Academic Qualifications
  • 2013 : PhD
    National Chemical Laboratory (NCL), Pune-India
  • 2006 : MSc
    Physical Chemistry Andhra University, Visakhapatnam
  • 2004 : BSc
    Andhra University, Visakhapatnam
Professional Appointments
Position Held Institute/University
Assistant Professor School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 2022-Present
Assistant Professor School of Engineering, Amrita Vishwa Vidyapeetham, Chennai 2019-2022
Assistant Professor School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore 2016-2019
Assistant Professor Annamacharya Institute of Science and Technology (AITS), Rajampet, A.P. 2014-2016
Postdoctoral Fellow Department of Materials Science and Engineering, Yonsei University, Korea 2013-2014
Research

Projects

  • Title of the Project: Non-metallic heterojunction photocatalyst immobilized microcapillaries as optofluidic reactors for the effective continuous flow solar water disinfection
    Funding Agency: DST-SERB under ECR scheme
    Duration: 3 Years (2017-2020)
    Status: Completed
Awards & Achievements
  • Early Career Research Grant-2017 by Science and Engineering Research Board (SERB-DST) India
  • AIRA Award 2020
  • Qualified GATE-2007 (with a percentile of 96)
  • Qualified the CSIR-UGC NET 2007 (CSIR-JRF)
  • Best Researcher Award by Amrita Vishwa Vidyapeetham
  • Received NPTEL Domain certificate under the domain of “Faculty-Advanced” (Oct- 2021)
  • Recognized as NPTEL Enthusiast (July-Dec 2021)
  • Recognized as NPTEL believer (July-Dec 2021)
Membership in Professional Societies
  • Institute of Electrical and Electronics Engineers (IEEE): 96155653
  • Materials Research Society of India (MRSI): LMB3144
Teaching
  1. Engineering Chemistry
  2. Engineering Chemistry Lab
  3. Environmental Science
  4. Materials Science for Electrical Engineering
  5. Solid State Chemistry
  6. Corrosion Science
  7. Molecular Spectroscopy
  8. Physical chemistry
Students Guided/Guiding

PhD- Completed

  • Dr. M. Roshith
    Reg No – CB.SC.D*CHE18001-FT
    Research Area: Photocatalysis
    Thesis Title: Non-metallic photocatalyst, its heterojunction and their immobilization for photocatalytic water disinfection.
    Present Position: Scientific Officer, Amrita Vishwa Vidyapeetham, Coimbatore

MSc Projects
Ongoing

  • Revathy M. P.
    Reg No – CB.SC.I5CHE18033
    Research Topic: Antimicrobial textiles
  • Haripriya P
    Reg No – CB.SC.I5CHE18019
    Research Topic: Antimicrobial textiles
  • Architha Ranjan
    Reg No – CB.SC.I5CHE18009
    Research Topic: Elemental Photocatalysis
  • Diya Jino (Jointly with Dr K Elango)
    Reg No- CB.SC.I5CHE18015
    Research Topic: Elemental Photocatalysis

Completed

  • Ranjana M
    Reg No- CB.SC.P2CHE17009, 2018
    Research Area: Anisotropic Cu nanostructures and their applications
    MSc Thesis title: One Dimensional Metal Nanowires- A Case Study of Copper: Synthesis and Applications
    Present Position: Research Scholar, Dept. Of Chemistry, Manipal Institute of Technolgy, Manipal Academy of Higher Education, Manipal, Karnataka
  • Athira K
    Reg No – CB.SC.P2CHE18004, 2020
    Research Area: CuO nanostructures and their antimicrobial activity
    MSc Thesis title: Rhamnolipid mediated synthesis of copper oxide nanoparticles & their antimicrobial studies
    Present Position: Programmer Analyst, Zifo R nD Solutions, DLF IT Park, Chennai, Tamil Nadu
  • Athira T K
    Reg No – CB.SC.P2CHE18006, 2020
    Research Area: Elemental photocatalysis
    MSc Thesis title: Commercial red phosphorous as efficient photocatalyst for the reduction of Cr (VI) under direct sunlight
    Present Position: Scientist (Placement), Broughton Life Sciences Limited, Lancashire, UK
  • Devika C
    Reg No – CB.SC.I5CHE16009, 2021
    Research Area: Anisotropic Cu nanostructures
    MSc Thesis title: Impact of iodide ions in the transformation of Cu nanostructures from one-dimensional nanowires to two-dimensional microplates
    Present Position: Subject matter expert in Chemistry at STRAIVE, Chennai
  • Smera. R
    Reg No – CB.SC.I5CHE16030, 2021
    Research Area: Elemental Photocatalysis
    MSc Thesis title: Immobilization of non-metallic photocatalyst to improve the re- usability of photocatalyst.
    Present Position: Preparing for competitive examination.
  • Anjana T
    Reg No – CB.SC.I5CHE17005,2022
    Research Area: Photocatalysis for the production of H2O2
    MSc Thesis title: Alkali metal-doped graphitic carbon nitride as photocatalysts for the generation of H2O2
    Present Position: Working in BYJU’S as academic specialist
  • Josikasree R
    Reg No – CB.SC.P2CHE20008, 2022
    Research Area: Photocatalysis and adsorption
    MSc Thesis title: Red- Black phosphorus composite towards the degradation and adsorption of a textile wastewater using crystal violet as a model pollutant
    Present Position: Preparing for PSC examinations
  • Sreelakshmi K
    Reg No – CB.SC.I5CHE17035, 2022
    Research Area: Photocatalysis for the production of H2O2
    MSc Thesis title: Halogen doped g-C3N4 as photocatalyst for the generation of H2O2 Present Position: Preparing for competetive examinations
  • Jayakrishnan R
    Reg No – CB.SC.I5CHE17017, 2022
    Research Area: Elemental Photocatalysis
    MSc Thesis title: Red and Black Phosphorus Composite as Photocatalyst for the Disinfection of E. Coli under Sunlight
    Present Position: B. Ed. student
  • Unnimaya B
    Research Area: Combustion methods to synthesize metal oxides nanomaterials
  • Kavya
    Research Area: Photocatalysis
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