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Institution

Vignan University

EducationGuntur, Andhra Pradesh, India
About: Vignan University is a education organization based out in Guntur, Andhra Pradesh, India. It is known for research contribution in the topics: Control theory & CMOS. The organization has 1138 authors who have published 1381 publications receiving 7798 citations.


Papers
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Journal ArticleDOI
TL;DR: Electrocatalytic water oxidation performance of a new cobalt-based catalyst, Co3 (BO3 )2 , with a Kotoite-type crystal structure is investigated under neutral conditions and it is revealed that the catalyst retains its stability over a pH range of 3-14.
Abstract: The development of new water oxidation electrocatalysts that are both stable and efficient, particularly in neutral conditions, holds great promise for overall water splitting. In this study, the electrocatalytic water oxidation performance of a new cobalt-based catalyst, Co3 (BO3 )2 , with a Kotoite-type crystal structure is investigated under neutral conditions. The catalyst is also hybridized with CNTs to enhance its electrocatalytic properties. A remarkable increase in catalytic current along with a significant shift in the onset overpotential is observed in Co3 (BO3 )2 @CNT. Additionally, CNT addition also greatly influences the surface concentration of the catalyst: 12.7 nmol cm-2 for Co3 (BO3 )2 @CNT compared with 3.9 nmol cm-2 for Co3 (BO3 )2 . Co3 (BO3 )2 @CNT demands overpotentials of 303 and 487 mV to attain current densities of 1 and 10 mA cm-2 , respectively, at pH 7. Electrochemical and characterization studies performed over varying pH conditions reveal that the catalyst retains its stability over a pH range of 3-14. Multi-reference quantum chemical calculations are performed to study the nature of the active cobalt sites and the effect of boron atoms on the activity of the cobalt ions.

25 citations

Journal ArticleDOI
TL;DR: A filamentous fungi F. equiseti strain ANP2 with good exopolysaccharide (EPS) yield, apparent viscosity was screened and isolated from Krishna estuarine mangrove sediments as mentioned in this paper.

25 citations

Journal ArticleDOI
TL;DR: In this article, the experimental data of Modulus of Elasticity (MOE) values are compared with codes and previous literature to predict the values, experimental data is evidently representing the predicted values are almost equal to laboratory tested values.

25 citations

Journal ArticleDOI
TL;DR: In this article, a bipolar resistive switching mechanism of Pt/Nb2O5/Pt and Bare conductive paint (BCP)/Nb 2O5 /Pt memristive devices with orthorhombic phase prepared by e-beam evaporation method was investigated.

25 citations

Journal ArticleDOI
TL;DR: In this paper, the molecular structure of cyclophosphazene amine (PZA) was confirmed by 1H, 13C NMR and MASS spectroscopic methods and the developed polyimide and its composites were studied for optical, thermal and dielectric properties along with their morphological studies.
Abstract: In the present work, phosphazene core-based polyimide and polyhedral oligomeric silsesquioxane (POSS)-reinforced phosphazene polyimide nanocomposites were developed and characterized. The molecular structure of cyclophosphazene amine (PZA) was confirmed by 1H, 13C NMR and MASS spectroscopic methods. The developed polyimide and its composites were studied for optical, thermal and dielectric properties along with their morphological studies. Interestingly, it was found that the incorporation of 10 wt% of POSS-reinforced PZI composites possesses an improved glass transition temperature (Tg), thermal stability, char yield and flame-retardant behavior than those of neat PZI matrix. The value of dielectric constant gets decreased with increasing the weight percentages of POSS reinforcement and thus 10 wt% POSS-reinforced PZI composites possesses the lowest value of dielectric constant (k = 2.1). Further, it also possesses the highest UV shielding behavior in UVA region, i.e., 93% with minimum weight loss even after exposing for 165 h. The antibacterial activity of the neat PZI matrix and POSS/PZI composites were also studied. The data obtained from different studies that it is suggested that the 10 wt% of POSS/PZI hybrid composite materials can be used in the form of coatings, sealants and matrices in aerospace as well as microelectronics applications.

25 citations


Authors
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202322
202231
2021352
2020254
2019250
2018159