Odd Semester

CHI 421  Solid State Chemistry

CHI 301  Petrochemicals and Polymers

CY 101 Chemistry  I

Even Semester

CHI 423  Adsorption & Heterogeneous catalysis

CHI 322  Electrochemistry & Surface phenomenon

CY 102  Chemistry II

Our research involves nanomaterials and processing for energy storage, detectors using solid state processes. For energy storage our study involves synthesis and characterization of oxide-based electroceramics (Perovskite oxides ABO₃, CaCu₃Ti₄O₁₂). The properties and applications of many electroceramics depend on the close control of the crystal structure, composition, ceramic microstructure, dopants and dopant (or defect) distribution. Materials of well-defined composition are synthesized and characterized by a variety of studies like TG/DTA, X-ray powder diffraction (XRD), Scanning Electron microscopy (SEM), Transmission Electron microscopy (TEM), Energy Dispersive X-ray spectroscopy (EDX), FTIR. The electrical and dielectric properties are usually characterized by AC Impedance spectroscopy and Electrometer with variation of frequency and temperature.  Impedance spectroscopy is a powerful technique which is being developed to probe electrical inhomogeneities in ceramics, and in particular to study electrode/sample interfaces, surface layers, electro-active grain boundaries, core-shell phenomena within electrically heterogeneous grains, ferroelectricity and ionic conduction. This multi-technique approach has helped rationalize the composition-structure-property relationships in important electroceramics which include ferroelectrics, solid electrolytes and high temperature superconductors.

                                                                                     2024

• Microstructure, dielectric and ferroelectric properties of CaCu3-xZnxTi4-xCexO12 ceramics prepared via semi-wet route

         Anuj Kumar Gond , Atendra Kumar , Anees A. Ansari , Sunil Kumar , Sumit Kumar , Ajit N. Gupta , Akhilesh Kumar , Youngil Lee , Kamdeo Mandal ,Himanshu Shekher , Laxman Singh,

         Processing and Application of Ceramics 18 [1] (2024) 117–122  https://doi.org/10.2298/PAC2401117K

• Dielectric and Electrical Properties of Cobalt Vanadium doped and undoped CCTO Ceramics synthesized via Semi wet route"

         Anup Kumar, Vinod Kumar, Manish Kumar Verma, Vishnu Shankar Rai, D. Tiwary, K.D. Mandal

        Transactions on Electrical and Electronic Materials.(Accepted 7 April 2024)

•  Studies on Electrical & Dielectric properties of rare earth based complex perovskite Oxide Bi5Yb3O12 ceramic material synthesized via Chemical route

          Anup Kumar; Vinod Kumar; Atendra Kumar; Dhanesh Tiwary; K.D. Mandal
         Journal of Materials Science: Materials in Electronics (Accepted 20 March 2024)

•  Effect of high-energy radiation on the electrical and optical characteristics of bioactive glasses 

          Aria Tauraso, Krishna S. Machuga, Joel McAdams, Ching Hua Su, Brian Cullum, Tagide deCarvalho, Narasimha S. Prasad, Bradley Arnold, Fow-  Sen Choa, K.D.Mandal,               and Narsingh Bahadur Singh 

       Optical Engineering 63(3), 037105 (19 March  2024).    https://doi.org/10.1117/1.OE.63.3.037105

•   Ni0.5Co0.5S Nano-Chains: A High-performing Intercalating Pseudocapacitive Electrode in Asymmetric Supercapacitors (ASC) mode for the development of Large-scale Energy Storage Devices

           Kushwaha, Vishal; Mandal, K.D ; Singh, Preetam; Gupta, Asha

          Dalton Transactions - DT-ART-12-2023-004184.R1(In Revision)

• The emergence of Griffiths phase in CaCu₃Ti_(4−x)Mn_xO₁₂ (CCTMO, x = 1, 2 and 3) geometrically frustrated antiferromagnetic complexes perovskite

           Vinod Kumar,   Anup Kumar,  Shruti Singh,  Krishna Kumar,  Manish Kumar Verma,  Vishnu Shankar Rai,  Gurudeo Nirala, Shail Upadhyay,Navneet Yadav, N.     B.Singh, Dhanesh Tiwary &   K. D. Mandal

           J Mater Sci: Mater Electron 35, 136 (2024). https://doi.org/10.1007/s10854-024-11930-z

•  Evolution of Microstructure, dielectric and electrical properties of Nd doped BCTO synthesized via semi wet route

           Dinesh Prajapati, Vishnu Shankar Rai, Biswajit Jena, Atendra Kumar, Harish Verma, N. B. Singh and K. D. Mandal

           J Nanopart Res (2024) 26:30 https://doi.org/10.1007/s11051-024-05942-3

•  Phase evolution, dielectric and electric behaviour of Sm-doped BCTO ceramic fabricated by semi wet method

          Dinesh Prajapati, Vishnu Shankar Rai, Atendra Kumar, Harish Verma, Shail Upadhyay, N.     B. Singh and K. D. Mandal

          DOI: 10.1002/crat.202300270

          Cryst. Res. Technol. 2024, 2300270

                                                                                           2023

•  Studies on Impedance and dielectric properties of Bi2/3Cu3Ti4-xSixO12 (x= 0.05, and 0.1) ceramics synthesized by the semi-wet method

        Vishnu Shankar Rai, Dinesh Prajapati, Vinod Kumar, Manish Kumar Verma,Harish Verma,Shail Upadhayay,Anup Kumar ,N.B.Singh and K.D. Mandal

        Journal of Materials Engineering and Performance (Accepted on 20 Sept.2023 and published onnline)

•  Dielectric and Electrical Properties measurement of BCTO and Co & V doped BCTO synthesized via Semi wet route method

          Anup Kumar, Vinod Kumar, Manish Kumar Verma, Vishnu Shankar Rai, Dinesh Prajapati, Biswajit Jena, Dipendra Kumar Verma, Poonam Kumari, D. Tiwary, K.D. Mandal

         Journal of Materials Science: Materials in Electronics (Accepted on 16th Aug, 2023)

        Published online 03 Sept. 2023,  DOI  10.1007/s10854-023-11138-7

•  Highly Efficient Photocatalytic Studies on Bi36Fe2O57 Ceramic Synthesized by Chemical Route

          Manish Kumar Verma, Vinod Kumar, Vishnu Shankar Rai, Dinesh Prajapati, Upakar  Patel, Tapas Das, Kedar Sahoo, Arup Kumar De,            Aaditya Kumar Prajapati, N. B. Singh, K. D. Mandal

Transactions on Electrical and Electronic Materials (Accepted on 03rd Aug, 2023)

•  Morphological evolution and transition at nanoscale in BSTO ceramic materials

N. B. Singh, Ching Hua Su, Fow-Sen Choa, Bradley Arnold, Brian Cullum & K. D. Mandal

Ferroelectrics, 611(1), (2023) 268-278.

 https://doi.org/10.1080/00150193.2023.2201789

•  Dielectric and electric properties of Zn doped and undoped Bi_2/3Cu₃Ti₄O₁₂ ceramic prepared by chemical route

Vishnu Shankar Rai, N. B. Singh, K. D. Mandal

Ferroelectrics, 611(1), 2023

Pages 40-47 | Received 24 Jul 2022, Accepted 31 Mar 2023, Published online: 17 Jul 2023

https://doi.org/10.1080/00150193.2023.2201767

•  Dielectric and Electrical sensing behavior of undoped and doped complex perovskite oxide,

 Vishnu Shankar Rai, Srikrishna Dutta Verma, Anup Kumar, K. D. Mandal, Meghan Brandt, N. B. Singh

Proc. SPIE 12548, Smart Biomedical and Physiological Sensor Technology XX, 1254803 (14 June 2023); doi: 10.1117/12.2663119

•  Investigation on the effect of Dy doping on the microstructure, dielectric, electrical, and magnetic properties of Bi2/3Cu3Ti4O12 ceramic

Dinesh Prajapati, Vishnu Shankar Rai, Vinod Kumar, Manish Kumar Verma, Atendra Kumar, N. B. Singh, and K. D. Mandal

Journal of Materials Science: Materials in Electronics (Accepted on 06^th February, 2023)

•   Emergence of dielectric properties by doping of semi-transition metal in semi-conductor complex perovskite oxide

Vishnu Shankar Rai, Dinesh Prajapati, Manish Kumar Verma, Vinod Kumar, Atendra Kumar, Tapas Das, Kedar sahoo, N.B. Singh, and K. D. Mandal

Crystal Research and Technology (Accepted on 30^th January, 2023)

•  The Effect of Rare Earth Metal Doping in Bi2/3Cu3Ti4O12 Ceramic on Microstructure, Dielectric and Electrical Properties

Dinesh Prajapati,  Vishnu Shankar Rai, Vinod Kumar,   Manish Kumar Verma,   Atendra Kumar,   N. B. Singh &  K. D. Mandal

Trans. Electr. Electron. Mater. 24, 194–204 (2023). https://doi.org/10.1007/s42341-023-00435-x

•  Nanocrystalline β-NiS: a redox-mediated electrode in aqueous electrolyte for pseudocapacitor/supercapacitor applications Vishal Kushwaha ^a, Asha Gupta *^a, Ram Bilash Choudhary ^b, K. D. Mandal ^a, Rakesh Mondal ^c and Preetam Singh DOI: 10.1039/D2CP03847A (Paper) Phys. Chem. Chem. Phys., 2023, 25, 555-569

2022

•  Low temperature synthesis, dielectric and electrical characteristics of Bi2/3Cu3− xNixTi4O12 (where x= 0.05, 0.1, and 0.2) ceramics for the dielectric and electrical  properties 

Vishnu Shankar Rai, Dinesh Prajapati, Vinod Kumar, Manish Kumar Verma, Santosh Pandey, Tapas Das, N. B. Singh, and K. D. Mandal.

Journal of Materials Science: Materials in Electronics 33(8) (2022): 5273-5282.

•  Influence of Zn doping on microstructure, dielectric, and electric properties in Bi2/3Cu3Ti4O12 ceramic synthesized by the semi-wet method

Vishnu Shankar Rai, Dinesh Prajapati, Manish Kumar Verma, Vinod Kumar, Santosh Pandey, Tapas Das, N. B. Singh, and K. D. Mandal. 

Journal of Materials Science: Materials in Electronics 33 (2022): 14868-14881

•  Study of dielectric and magnetic properties of CaCu3Ti4-XMnXO12 (X= 0 and 0.1) ceramic synthesized through semi-wet route

Vinod Kumar, Santosh Pandey, Manish Kumar Verma, Shruti Singh, Vishnu Shankar Rai, Dinesh Prajapati, N. B. Singh, Champa Lal Prajapat, Asnit Gangwar, and K. D. Mandal.

Journal of the Australian Ceramic Society 58(2) (2022): 637-644.

•  SrFeO_{3− δ} : a novel Fe⁴⁺↔ Fe²⁺ redox mediated pseudocapacitive electrode in aqueous electrolyte.

Asha Gupta, Vishal Kushwaha, Rakesh Mondal, Abhay Narayan Singh, Rajiv Prakash, K. D. Mandal, and Preetam Singh.

Physical Chemistry Chemical Physics 24(18) (2022): 11066-11078

•  Reinforcement of nanoporous lanthanum-doped zinc borate by vanadium selenide nanosheets for improved tribological activity. 

Alok Kumar Singh, Nivedita Shukla, Dinesh K. Verma, Bharat Kumar, K. D. Mandal, and Rashmi B. Rastogi.

RSC Advances 12(29) (2022): 18685-18696.

1.Mr.Dinesh Kumar Prajapati (CSIR JRF)

2.Mr.Anup Kumar (PMRF)

3.Mr.Biswajeet Jena (TA)