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AbstractTransition metal oxides are widely studied in different fields of science and technology for their applications such as sensors, scintillators, photo detectors etc. Nowadays their capability as super capacitors are also explored. In the present work, the electrochemical properties of AWO4 nanoparticles with A site occupied by zinc, magnesium, or manganese were discussed. AWO4 nanoparticles (A=Zn, Mg or Mn) were synthesized though a modified combustion method. XRD and FTIR spectroscopic techniques were used for analysing the morphology of these compounds. ZnWO4 and MnWO4 are found to possess monoclinic structure while MgWO4 is found to possess tetragonal structure. The characteristic vibration peaks were observed in the FTIR spectra for ZnWO4, MgWO4 and MnWO4. CV analysis was performed to understand the electrochemical characteristics. The specific capacitance of the samples is in the order MnWO4> MgWO4> ZnWO4. The ac impedance spectrum for all the samples showed a steep straight line in the high frequency region showing good electrical conductivity. The results suggest that the materials can be molded as good candidates for electrode materials in energy storage devices.

28 Mar 2025·Journal of Management Research and Analysis

Tourism 2.0: Exploring the evolution of smart destinations

Author: Babu, Krishna ; Krishnamma, BS ; Zacharia, Aleena Maria

01 Mar 2025·Nordic Journal of Botany

Psammogeton tylerii sp. nov. (Apiaceae: Pimpinelleae) from Jammu, India

Author: Magotra, Rani ; Bhellum, B. L.

A new species, Psammogeton tylerii (Apiaceae) from a natural population along the riverine catchment area of the district of Jammu, Jammu and Kashmir, is described and illustrated. The new species differs from its closely allied Psammogeton canescens in having an exceptionally elongated peduncle (12–20 cm) which is articulated nearly in the middle. The inflorescence is 4.0–6.5 cm across with 2.0–3.2 cm long rays. The number of flowers is about 25 per umbellet. To make it easier to identify it in the field, a diagnostic key, images and illustrations of peduncle, inflorescence and umbellets are presented.

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