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All Journal CHEMISTRY PROGRESS JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Communications in Science and Technology G-Tech : Jurnal Teknologi Terapan
Munandar, Nurharis
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Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering

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Green synthesis of copper oxide (CuO) nanoparticles using Anredera cordifolia leaf extract and their antioxidant activity Munandar, Nurharis; Kasim, Syaharuddin; Arfah, Rugaiyah; Basir, Djabal Nur; Hala, Yusafir; Zakir, Muhammad; Natsir, Hasnah
Communications in Science and Technology Vol 7 No 2 (2022)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.7.2.2022.1004

Abstract

Our present study describes the green synthesis of copper oxide nanoparticles (CuONPs) using a leaf extract from Anredera cordifolia (AC). The presence of flavonoids, saponins, and alkaloids in the plant extract was confirmed by phytochemical analysis, and these chemicals can be used as reducing, stabilizing, and capping agents. UV-Vis Spectrophotometry, XRD, FT-IR, and SEM-EDS were used to characterize the CuONPs. The UV-Vis spectroscopy of the biosynthesized CuONPs revealed an absorption peak at 325 nm. The XRD graph also revealed that the Debye-Scherrer formula observed an average crystalline size of around 43.47 nm. EDS analysis confirmed the composition and purity of CuONPs. The presence of functional groups -OH, C=O, and C-O triggers the synthesis of CuONPs, according to FT-IR analysis. Furthermore, the CuONPs antioxidant property inhibited free radicals as antioxidants with an IC50 value of 34.20 g/mL.
Adsorpsi Simultan Ion Cd(II) pada Abu Dasar Batubara Teraktivasi Anwar, Chairil; Wijaya, Dwi Putra; Munandar, Nurharis; Bonaventura, Ridho; Hutagalung, Fajar Y.S.T.
JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Vol. 9 No. 2 (2024): JLPPM SAINTEK
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35801/jlppmsains.9.2.2024.60653

Abstract

Telah dilakukan penelitian tentang adsorpsi simultan ion Cd(II) menggunakan abu dasar batubara teraktivasi. Penelitian dilakukan dengan mengaktivasi abu dasar batubara menggunakan HCl pekat. Karakterisasi abu dasar batubara teraktivasi dilakukan dengan menggunakan spektrofotometer infra merah dan difraktometer sinar-X. Parameter yang dipelajari meliputi pengaruh pH dan variasi waktu konta. Mekanisme adsorpsi diketahui melalui desorpsi dengan menggunakan pelarut aquades dan KNO3. Konsentrasi ion logam yang tersisa setelah adsorpsi dan desorpsi ditentukan dengan menggunakan spektrofotometer serapan atom. Hasil karakterisasi menunjukkan bahwa abu dasar batubara teraktivasi telah terbentuk dengan baik. Kondisi optimum adsorpsi ion logam Cd(II) abu dasar batu bara teraktivasi adalah pH 5 dan waktu kontak 60 menit. Parameter kinetika adsorpsi abu dasar terakteraktivasi mengikuti persamaan kinetika pseudo orde dua dengan nilai konstanta laju pada ion Cd (II) 0,209 dan 1,734 g.mg-1.min-1. Model isoterm adsorpsi mengikuti model isoterm Langmuir dengan konstanta kesetimbangan sebesar 13125,6 L.mol-1. Kapasitas adsorpsi sebesar 1,0433 x 10-5 dan melibatkan energi adsorpsi sebesar 23,49. Mekanisme adsorpsi simultan ion Cd(II) dipengaruhi oleh berbagai interaksi yaitu: mekanisme pemerangkapan (28,26), mekanisme pertukaran ion (23,06).
Synthesis of Cu Nanoparticles using Anredera cordifolia Extract and their Potential as Antidiabetic with Alpha Amylase Enzyme Inhibition Munandar, Nurharis; Aritonang, Henry F.; Bonaventura, Ridho; Wijaya, Dwi Putra
Communications in Science and Technology Vol 10 No 2 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.2.2025.1829

Abstract

This study reports a green synthesis of copper nanoparticle using binahong (Anredera cordifolia) leaf extract as both a bioreductant and a capping agent. The synthesis was optimized by varying the extract-to-precursor ratio (1:3, v/v) and the reaction pH (6–11) with pH 10 selected as the optimal condition for nanoparticle preparation. Nanoparticle formation was confirmed using UV–Vis spectroscopy, showing a strong absorption band at 325 nm, indicative of oxide-based copper nanostructures and/or surface oxidation during green synthesis. XRD patterns revealed Cu2O as the dominant crystalline phase, characterized by reflections at 2θ ≈ 29.6°, 36.4°, 42.3°, 61.3°, 73.5°, and 77.3°, with a possible minor contribution from metallic Cu due to peak overlap. FTIR spectra confirmed the presence of biomolecules (O–H and C–H bands, along with carbonyl/COO−-related bands) involved in nanoparticle stabilization, as well as Cu–O vibrations around 600–620 cm−1 consistent with Cu2O. PSA showed a dominant hydrodynamic size in the 60–70 nm range (average 65 nm), whereas SEM indicated aggregation into micrometer-scale clusters upon drying. In vitro α-amylase inhibition assays demonstrated concentration-dependent inhibition, with CuNPs (IC50 6.18 μg/mL) and the extract + CuNPs mixture (IC50 6.83 μg/mL) approaching that of acarbose (IC50 5.04 μg/mL) and exhibiting stronger activity than the extract alone (IC50 8.89 μg/mL). The key contribution of this work is the development of a simple, aqueous, environmentally friendly route that leverages local biological resources while producing Cu2O-rich nanoparticles with α-amylase inhibitory activity approaching that of acarbose. These findings highlight the promise of a low-cost antidiabetic candidate for postprandial glucose control and provide a basis for further investigations into nanoformulation and preclinical evaluation.
Silver Nanoplates: Synthesis, Functional Applications and Translation Potential, A Systematic Literature Review Wijaya, Yosia Nico; Munandar, Nurharis
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8969

Abstract

Silver nanoplates and related triangular nanoprisms provide edge- and tip-enhanced plasmonics that are attractive for sensing, catalysis, energy conversion, and biomedical concepts, yet translation is frequently limited by oxidative reshaping, ligand loss, and inconsistent reporting. This systematic literature review synthesizes peer-reviewed journal evidence published between 2015 and 2025 to clarify synthesis levers, structure-property-performance relationships, and application readiness. ScienceDirect and Google Scholar were searched (last update: 15 December 2025) and screened using a PRISMA 2020 workflow and PICOC framing. From 137 records, 23 studies met inclusion criteria for qualitative synthesis. Across the literature, reproducible performance most strongly tracks coupled control of lateral size and thickness via pH, chelators, and capping ligands, which tunes LSPR position and linewidth. Applications are most mature in plasmonic sensing, including rapid pathogen and small-molecule detection, while flow-compatible catalysis and device-integrated energy studies provide clearer pathways toward deployment. Key gaps remain in standardized morphology descriptors, long-term stability protocols, batch reproducibility, and leaching or toxicity evidence. Actionable guidance is provided for scalable synthesis, robust validation, and translation-focused reporting. Unlike earlier reviews that emphasize either plasmonic principles or single application niches, this review integrates synthesis control with stability and reporting standards to accelerate translation.
Sintesis dan Karakterisasi Zeolit Y dari Pasir Vulkanik Gunung Soputan dengan Metode Hidrotermal sebagai Adsorben Logam Berat Timbal (Pb) Wijaya, Dwi Putra; Koleangen, Harry Steven Julius; Munandar, Nurharis
CHEMISTRY PROGRESS Vol. 19 No. 1 (2026)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.19.1.2026.67951

Abstract

ABSTRAK Telah dilakukan sintesis Zeolit Y secara hidrotermal berbasis pasir vulkanik Gunung Soputan. Hasil ekstraksi dan pengujian XRF menunjukkan ekstrak silika (SiO2) yang didapatkan dari pasir vulkanik Gunung Soputan memiliki kemurnian sebesar 92.37%. Pengujian karakterisasi dari Zeolit Y berdasarkan hasil XRD dan citra SEM menunjukkan munculnya peak pada 2θ = 6º, 10º, 15º, 23º, dan 27º dengan spesifik sudut 2θ = 6º [111] yang menunjukkan karakteristik Zeolite Y. Citra SEM menunjukkan tekstur permukaan material Zeolite Y yang cukup teratur dengan ukuran kristal 1-10 µm yang mengimplikasikan telah terbentuknya material Zeolit Y yang baik. Kemampuan Adsopsi dari Zeolit Y terhadap logam berat Pb pada variasi waktu kontak 40, 50, dan 60 menit, memiliki nilai masing-masing 79, 85,5, 93%. Kemampuan pemakaian kembali (lifetime) Zeolit Y yang didapat setelah tiga kali pemakaian. Menunjukkan kapasitas adsopsi Zeolit Y menurun.  Kemampuan adsopsi setelah 3 kali pemakaian ulang yaitu sebesar 51%, 46,5%, dan 34,5% dengan nilai y = -1,65x + 12,1 dengan R² = 0,9356. ABSTRACT The synthesis of Y Zeolite was carried out hydrothermally using volcanic sand from Mount Soputan. The extraction and XRF testing results showed that the silica (SiO₂) obtained from the volcanic sand of Mount Soputan had a purity of 92.37%. Characterization tests of the Y Zeolite, based on XRD results and SEM images, revealed peaks at 2θ = 6º, 10º, 15º, 23º, and 27º, with specific angles at 2θ = 6º [111], which are characteristic of Y Zeolite. SEM images demonstrated a relatively regular surface texture of the Y Zeolite material with crystal particle sizes around 1-10 µm, indicating the formation of high-quality Y Zeolite material. The adsorption capacity of Y Zeolite for heavy metal Pb at contact times of 40, 50, and 60 minutes was 79%, 85.5%, and 93%, respectively. The reusability (lifetime) of Y Zeolite, after three cycles of use, showed a decrease in adsorption capacity. After three uses, the adsorption capacity was 51%, 46.5%, and 34.5%, with the regression equation y = -1,65x + 12,1 and R² = 0,9356.
Investigasi DFT terhadap Stabilitas dan Perilaku Ionisasi Senyawa Kompleks [Ag(NH3)n] (n = 1–4): DFT Investigation of the Stability and Ionization Properties of Ag(NH3)n Complexes (n = 1–4) Bonaventura, Ridho; Maarebia, Rosalinda Z.; Wijaya, Dwi Putra; Munandar, Nurharis; Hutagalung, Fajar Y. S. T.
CHEMISTRY PROGRESS Vol. 19 No. 1 (2026)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.19.1.2026.68092

Abstract

ABSTRAK Pemahaman mengenai hubungan antara kestabilan dan proses ionisasi pada senyawa kompleks logam penting dalam pengembangan material fungsional dan sistem berbasis logam transisi. Penelitian ini bertujuan mengkaji pengaruh jumlah ligan NH3 terhadap kestabilan, sifat elektronik, dan karakteristik ionisasi kompleks [Ag(NH3)n] (n = 1–4) menggunakan metode Density Functional Theory (DFT). Optimasi geometri dilakukan untuk memperoleh struktur paling stabil, sedangkan analisis kestabilan dilakukan melalui energi pembentukan, energi stabilisasi, dan celah energi HOMO–LUMO. Karakteristik ionisasi dievaluasi menggunakan pendekatan AIP dan VIP dari hasil perhitungan optimasi dan frekuensi. Penelitian ini dilakukan secara komputasi dan perhitungan dilakukan dengan menggunakan basis set 6-3111++ G (d,p) untuk senyawa NH3, dan LANL2DZ ECP – B3LYP untuk unsur Ag & ion Ag+, dan untuk senyawa kompleks [Ag(NH3)n]+ (n=1-4) pada proses optimasi geometri. Sedangkan pada perhitungan opt+freq (optimasi dan frekuensi) untuk senyawa-senyawa kompleks [Ag(NH3)n] (n=1-4) dan [Ag(NH3)n]+ (n=1-4) digunakan basis set yang berbeda, yaitu SDD-ECP dengan fitting set DEF2SV. Hasil penelitian menunjukkan bahwa penambahan ligan NH3 meningkatkan kestabilan termodinamika kompleks, dengan [Ag(NH3)4] sebagai spesies paling stabil. Analisis HOMO–LUMO menunjukkan bahwa [Ag(NH3)2] memiliki kestabilan kinetik tertinggi. Nilai AIP dan VIP menurun secara bertahap seiring bertambahnya jumlah ligan, yang mengindikasikan peningkatan densitas elektron pada pusat logam Ag dan kemudahan pelepasan elektron. Hasil ini juga memberikan pemahaman yang lebih komprehensif mengenai peran ligan dalam mengatur kestabilan dan sifat elektronik kompleks perak–amonia, serta menjadi landasan teoritis bagi pengembangan material berbasis perak yang lebih efektif. ABSTRACT Understanding the relationship between stability and ionization processes in metal complexes is important for the development of functional materials and transition metal–based systems. This study aimed to investigate the effect of the number of NH3 ligands on the stability, electronic properties, and ionization characteristics of [Ag(NH3)n] complexes (n = 1–4) using Density Functional Theory (DFT). Geometry optimization was performed to obtain the most stable structures, while stability was evaluated through formation energy, stabilization energy, and HOMO–LUMO energy gap analyses. Ionization characteristics were assessed using Adiabatic Ionization Potential (AIP) and Vertical Ionization Potential (VIP) calculations based on optimized geometries and frequency analyses. Computational calculations were carried out using the 6-311++G(d,p) basis set for NH3 and the LANL2DZ effective core potential (ECP) combined with the B3LYP functional for Ag and Ag+ species during geometry optimization of the [Ag(NH3)n]+ complexes (n = 1–4). For geometry optimization and frequency calculations of neutral and ionized complexes, the SDD-ECP basis set with the DEF2SV fitting set was employed. The results showed that increasing the number of NH₃ ligands enhanced the thermodynamic stability of the complexes, with [Ag(NH3)4] exhibiting the highest stability. HOMO–LUMO analysis indicated that [Ag(NH3)2] possessed the greatest kinetic stability. Both AIP and VIP values decreased progressively with increasing ligand coordination, indicating higher electron density around the Ag center and a greater tendency for electron removal. These findings provide deeper insight into the role of ligands in governing the stability and electronic properties of silver–ammonia complexes and offer a theoretical basis for the development of more effective silver-based materials.
Co-Authors Arfah, Rugaiyah Bonaventura, Ridho Chairil Anwar Djabal Nur Basir Dwi Putra Wijaya Hasnah Natsir Henry Fonda Aritonang Hutagalung, Fajar Hutagalung, Fajar Y. S. T. Koleangen, Harry Steven Julius Maarebia, Rosalinda Z. Muhammad Zakir Syaharuddin Kasim Yosia Nico Wijaya Yusafir Hala