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All Journal CHEDS: Journal of Chemistry, Education, and Science Jurnal Sains dan Teknologi
Fiqih, Irvan Maulana
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Veterinary

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PREPARASI DAN IDENTIFIKASI GARAM TEMBAGA(II): SINTESIS [Cu(NH₃)₄]SO₄·H₂O SEBAGAI GARAM KOMPLEKS DAN [CuNH₄)₂(SO₄)₂·6H₂O SEBAGAI GARAM RANGKAP Hermayantiningsih, Dwi; Hakim, Muh. Sunwatul; Manurung, Tety Wahyuningsih; Fiqih, Irvan Maulana; Zahra, Laila
CHEDS: Journal of Chemistry, Education, and Science Vol 9, No 1 (2025)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/cheds.v9i1.11335

Abstract

Penelitian ini bertujuan untuk membandingkan sintesis dan karakterisasi garam kompleks tetra amina tembaga(II) sulfat monohidrat ([Cu(NH₃)₄]SO₄·H₂O) dengan garam rangkap kupri amonium sulfat heksahidrat ([Cu(NH₄)₂(SO₄)₂·6H₂O]). Metode sintesis melibatkan kristalisasi dari larutan tembaga(II) sulfat pentahidrat (CuSO₄·5H₂O) dengan amonia berlebih untuk garam kompleks, dan pencampuran stoikiometris dengan amonium sulfat ((NH₄)₂SO₄) untuk garam rangkap. Hasil sintesis menunjukkan bahwa garam kompleks berwarna biru tua karena transisi elektronik d-d pada ion [Cu(NH₃)₄]²⁺ dengan geometri bidang persegi, sedangkan garam ganda berwarna biru muda karena lingkungan oktahedral [Cu(H₂O)₆]²⁺. Uji kelarutan dan stabilitas terhadap air suling dan NH₃ pekat mengungkapkan bahwa garam kompleks lebih rentan terhadap perubahan pH, menghasilkan endapan coklat tua (Cu⁰) saat dipanaskan, sedangkan garam ganda tetap stabil dengan warna biru muda yang persisten. Hasil sintesis garam ganda mencapai 91,765%, lebih tinggi daripada garam kompleks (75,804%), karena stabilitas termodinamika dan ketahanan terhadap disosiasi. Studi ini menyoroti perbedaan mendasar dalam sifat fisikokimia kedua senyawa, yang relevan untuk aplikasi bahan berbasis tembaga dalam industri dan kimia koordinasi.
Sustainable Biomass-Derived Cellulose/HKUST-1 Composite from Purun (Lepironia articulata): Synthesis and FTIR Characterization Siti Unvaresi Misonia Beladona; Fiqih, Irvan Maulana; Zahra, Laila; Arum, Diah Panjar; Ripai, Achmad
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.7948

Abstract

This study explores the fabrication of a cellulose/HKUST-1 composite derived from purun (Lepironia articulata), a wetland biomass abundant in cellulose and promising as an eco-friendly feedstock for advanced materials. HKUST‑1, a copper-based metal-organic framework known for its high porosity, suffers from reduced stability in humid environments. To address this limitation, a composite integrating purun-derived cellulose with HKUST‑1 was synthesized and subsequently characterized using Fourier Transform Infrared (FTIR) spectroscopy. Cellulose was isolated via alkaline delignification and peroxide bleaching with a yield of 26.68%. HKUST-1 was synthesized using a solvothermal method, producing a turquoise-blue material with a yield of 70.96%. The composite was prepared using an ex-situ method, resulting in a green-colored product with a yield of 85.90%. FTIR analysis confirmed HKUST-1 formation through the disappearance of the C=O band (~1719 cm⁻¹) and the appearance of COO⁻ bands (~1560-1600 and ~1450 cm⁻¹), along with Cu-O vibration (~725 cm⁻¹). FTIR analysis of the composite revealed the presence of diagnostic peaks attributable to both cellulose and HKUST‑1, confirming successful incorporation without compromising structural integrity. Notably, the O‑H stretching band appeared broadened and slightly shifted, indicating hydrogen-bond interactions between cellulose and HKUST-1. These results demonstrate that purun-derived cellulose is a sustainable matrix for HKUST-1 with potential in adsorption applications.
Co-Authors Andra Ari P., Eko Marwanto Heru Mulyantoro Dwi Hermayantiningsih Arum, Diah Panjar Hakim, Muh. Sunwatul Ripai, Achmad Siti Unvaresi Misonia Beladona Tety Wahyuningsih Manurung Zahra, Laila