WORLD JOURNAL OF ADVANCE
HEALTHCARE RESEARCH

Zeina Loai Al-Yousef*, Ibraheem Asaad Ismaeel

ABSTRACT

Zinc zirconate (ZnZrO?) is a mixed-metal oxide with potential applications in heterogeneous catalysis and advanced oxidation processes. In the present study, ZnZrO? was synthesized by the sol-gel method under the optimized experimental conditions previously established and reported by the authors.[1] The synthesized material was subjected to thermal treatment at different temperatures and characterized using differential thermal analysis (DTA), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FT-IR) to investigate its thermal behavior, phase evolution, and structural characteristics. The catalytic activity of ZnZrO? was evaluated for the oxidative degradation of methylene blue (MB) in the presence of hydrogen peroxide (H?O?) under heterogeneous catalytic conditions. For comparison, NiZrO?, which had previously been synthesized and characterized by the sol-gel method according to the authors’ earlier work[2], was evaluated under the same catalytic conditions. The results showed that the ZnZrO? phase was formed at high calcination temperatures, with the ZnZrO? phase obtained at 1000 °C. The catalytic experiments demonstrated that ZnZrO? exhibited higher catalytic efficiency toward MB oxidation than NiZrO?, with catalytic efficiencies of 58.33% and 28.57%, respectively. These findings indicate that ZnZrO? possesses promising catalytic activity for the heterogeneous oxidative treatment of methylene blue using hydrogen peroxide and demonstrate its potential as a mixed-metal oxide catalyst for advanced oxidation applications.

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