Multifunctional Dy2NiMnO6/Reduced Graphene Oxide Nanocomposites and Their Catalytic, Electromagnetic Shielding, and Electrochemical Properties

Bibhuti Bhusan Sahoo; Prasanta Kumar Sahoo; Vijayabhaskara Rao Bhaviripudi; Krushna Chandra Sahu; Abhishek Tripathi; Naresh Kumar Sahoo; Radhamanohar Aepuru; Vishwajit M Gaikwad; Srikant Sahoo; Ashis Kumar Satpati; Chuan-Pei Lee

doi:10.1021/acsomega.3c07759

Multifunctional Dy₂NiMnO₆/Reduced Graphene Oxide Nanocomposites and Their Catalytic, Electromagnetic Shielding, and Electrochemical Properties

ACS Omega. 2024 Jan 19;9(4):4600-4612. doi: 10.1021/acsomega.3c07759. eCollection 2024 Jan 30.

Authors

Affiliations

¹ Department of Mechanical Engineering, Siksha "O" Anusandhan, Deemed to Be University, Bhubaneswar, Odisha 751030, India.
² Environmental Hydrology Division, National Institute of Hydrology, Jalvigyan Bhawan, Roorkee 247667, India.
³ Department of Physics, Defence Institute of Advanced Technology, Girinagar, Pune, Maharashtra 411025, India.
⁴ Departamento de Ingeniería Química, Biotecnología y Materiales, FCFM, Universidad de Chile, Santiago 8370415, Chile.
⁵ Department of Chemistry, Siksha 'O' Anusandhan, Deemed to be University, Bhubaneswar, Odisha 751030, India.
⁶ Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology Jaipur, Jaipur 302017, India.
⁷ Departamento de Mecanica, Facultad de Ingeniería, Universidad Tecnológica Metropolitana, Santiago 7800002, Chile.
⁸ Department of Physics, Amolakchand Mahavidyalaya, Yavatmal, Maharashtra 445001, India.
⁹ Analytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
¹⁰ Department of Applied Physics and Chemistry, University of Taipei, Taipei 10048, Taiwan.

Abstract

Multifunctional nanocomposites have shown great interest in clean energy systems and environmental applications in recent years. Herein, we first reported the synthesis of Dy₂NiMnO₆ (DNMO)/reduced graphene oxide (rGO) nanocomposites utilizing a hybrid approach involving sol-gel and solvothermal processes. Subsequently, we investigated these nanocomposites for their applications in catalysis, electromagnetic interference shielding, and supercapacitors. A morphological study suggests spherical-shaped DNMO nanoparticles of an average size of 382 nm that are uniformly distributed throughout the surface without any agglomeration. The as-prepared nanocomposites were used as catalysts to investigate the catalytic reduction of 4-nitrophenol in the presence of NaBH₄. DNMO/rGO nanocomposites demonstrate superior catalytic activity when compared with bare DNMO, with the rate of reduction being influenced by the composition of the DNMO/rGO nanocomposites. In addition, novel multifunctional DNMO/rGO was incorporated into polyvinylidene difluoride (PVDF) to develop a flexible nanocomposite for electromagnetic shielding applications and exhibited a shielding effectiveness of 6 dB with 75% attenuation at a frequency of 8.5 GHz compared to bare PVDF and PVDF-DNMO nanocomposite. Furthermore, the electrochemical performance of DNMO/rGO nanocomposites was investigated as an electrode material for supercapacitors, exhibiting the highest specific capacitance of 260 F/g at 1 A/g. These findings provide valuable insights into the design of DNMO/rGO nanocomposites with remarkable performance in sustainable energy and environmental applications.