Effect of pH Value on the Synthesis of NiO Nanoparticles and Microstructure of NiO Based Composite Anode

Abstract:

NiO nanoparticle was synthesized by a sol-gel method with three different pH values namely pH=1, 7 and 11, and then calcined at temperature of 450 ᵒC. The influence of different pH values on the physical properties of NiO nanoparticles were investigated by a particle size analyzer (PSA), field emission scanning electron microscope (FESEM) and X-ray diffractometer (XRD). Structural analysis confirmed that a cubic structure of NiO nanoparticle was obtained without any secondary phase for NiO powders prepared with pH=1, while the peak of secondary phase (Ni) appeared for NiO powders prepared with pH= 7 and 11. Morphological observation showed that the NiO nanoparticles prepared with pH=7 and 11 tend to form more agglomerates compared to one prepared with pH=1. The average diameter of NiO nanoparticles with pH 1, 7 and 11 were approximately in the range of 19-26 nm, 21-28 nm, and 24-30 nm, respectively. NiO powder that was synthesized with pH=1 was further used to prepare composite anode of NiO Nps-BaCe_0.54Zr_0.36Y_0.1O_2.95 (BCZY) powder. Unfortunately a composite of NiO Nps-BaCeO₃-BaZrO₃ was obtained instead of BCZY and governed by agglomerates with size in the range of 70-300 nm.

• Periodical: Solid State Phenomena (Volume 317)
• Pages: 447-453
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.317.447
• Online since: May 2021
• Authors: Noor Hidayah Aniza Zakaria, Nafisah Osman*
• Keywords: Composite Anode, NiO Nanoparticles, Particle Distribution, Proton Conducting

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