Jurnal Riset Kimia
Vol. 17 No. 1 (2026): March

Synthesis of Copper Oxide from HKUST-1 and Its Applications for Removal of Congo Red

Maulidah, Izzah (Unknown)
Patah, Aep (Unknown)



Article Info

Publish Date
31 Mar 2026

Abstract

This study presents research findings on the synthesis and characterization of HKUST-1 and derived-copper oxide materials, with significant practical implications. The HKUST-1 was synthesized using the solvothermal method at 100 °C for 10 hours using copper nitrate trihydrate (Cu(NO3)2∙3H2O) as the metal ion and trimesic acid as the ligand. The various copper oxides, CuO (air), Cu/Cu2O/C (Ar), and CuO (Ar/O2) were produced through pyrolysis from HKUST-1 at 600 °C for 8 hours. X-ray Diffraction (XRD) analysis confirmed the characteristic peaks of HKUST-1 and the other copper oxides. Pyrolysis under argon yielded a Cu/Cu2O/C (Ar) mixture instead of CuO. Fourier Transform Infrared (FTIR) spectroscopy showed consistent absorption bands while Scanning Electron Microscopy (SEM) revealed that HKUST-1 and derived HKUST-1 copper oxides had an octahedral crystal morphology. UV-DRS analysis demonstrated that CuO derived HKUST-1 exhibited smaller band gap as compared to the pure CuO sample. Adsorption tests with a 50 ppm Congo Red (CR) solution showed that all materials reached optimal adsorption at 60 minutes, with Cu/Cu2O/C (Ar) achieving the highest capacity of 95,52 mg/g. In photocatalysis tests, CuO (Ar/O2) removed 53% of contaminants, outperforming commercial CuO at 29%. The Cu/Cu2O/C (Ar) composite demonstrated the highest removal rate at 99%, indicating its potential for practical applications.

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