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Green Modifikasi Nanopartikel Au Terhadap Permukaan Bentonit Terpilar Cu Sebagai Degradasi Zat Warna Remazol Brilliant Blue R (RBBR) Indra Gunawan; Miftah Fauziah; Yoki Yulizar; Sudirman Sudirman
Jurnal Kimia dan Kemasan Vol. 41 No. 2 Oktober 2019
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v41i2.4331

Telah dilakukan sintesis bentonit terpilarisasi Cu dan diimmobilisasi nanopartikel Au sebagai katalis degradasi termal RBBR(Remazol Brilliant Blue R) menggunakan H2O2. Karakterisasi Na-bentonit, bentonit terpilarisasi Cu dan immobilisasi naopartikel Au di dalam Cu-bentonit dilakukan dengan menggunakan peralatan-peralatan FTIR, XRDdan SEM-EDS. Dalam kategori pewarna secara keseluruhan, RBBRadalah pewarna antrakuinon yang digunakan pada industri tekstil. Ini adalah pewarna berbahaya dan dapat merusak kehidupan akuatik dan juga kehidupan vegetatif jika air yang terkontaminasi digunakan untuk irigasi. Karakterisasi degradasi dengan menggunakan spektrofotometer UV-Vis menunjukkan pada jumlah katalis 4 mg Cu-bentonit-Au mampu mempercepat reaksi degradasi termal RBBRpada konsentrasi 1,56x10-5M, dengan persentase dye removalmencapai 98,18%. Waktu reaksi dan suhu reaksi optimum adalah 10 menit dan 98 oC, sementara konsentrasi optimum H2O2untuk degradasi RBBRadalah 4,62x10-1M.

EFFECT OF CONCENTRATION OF IMPERATA CYLINDRICA L LEAF EXTRACT ON SYNTHESIS PROCESS OF GOLD NANOPARTICLES Iwan Syahjoko Saputra; Yoki Yulizar; Sudirman Sudirman
Jurnal Sains Materi Indonesia Vol 19, No 2: JANUARI 2018
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Gold Nanoparticles (GoldNPs) successful was performed using HAuCl4 precursor as Au3+ ion source with 7x10-4 M concentration. The research aims to knows effect of concentration variation of Imperata cylindrica L leaf extract on synthesis process of gold nanoparticles. The research used of green synthesis method. Colloid of nanoparticles which is formed in analyzed using UV-Vis Spectrophotometer, FT-IR Spectroscopy, PSA, PZC, XRD and TEM. The results of synthesis showed the best concentration of Imperata cilindrica L leaf extract at 3,46%, happen a shift of wavelength at UV-Vis from 216 nm to 530 nm with 1.779 absorbance value. The PSA analysis showed a particle size of 51.87 nm and a PZC value of -19.2 mV. The result of FT-IR indicated a shift of wavenumber in the hidroxyl group from 3354 cm-1 to 3390 cm-1 and showed a interaction of hydroxyl group at imperata cylindrica L leaf extract with Au3+ ion. TEM analysis shows the morphology of GoldNPs that spherical shape with a particle size of 20 nm. XRD calculation results show crystallite size of gold nanoparticles is 15.47 nm.

BIOREDUCTION AND CHARACTERIZATION OF SILVER NANOPARTICLES FROM OIL PALM EMPTY FRUIT BUNCH Siti Suhartati; Iwan Syahjoko Saputra; Dwinna Rahmi; Yoki Yulizar; Sudirman Sudirman
Jurnal Sains Materi Indonesia Vol 21, No 4: JULY 2020
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2020.21.4.6032

BIOREDUCTION AND CHARACTERIZATION OF SILVER NANOPARTICLES FROM OIL PALM EMPTY FRUIT BUNCH (OPEFB). The synthesis of silver nanoparticles was successfully carried out by extracting oil palm empty fruit bunch. The precursor used was silver nitrate (AgNO3) with a concentration of 9x10-4 M and 5 wt% of the oil palm empty fruit bunch extract. OPEFB acted as a capping agent in the synthesis of silver nanoparticles. The bioreduction method Ag+ to Ag0 produced a silver nanoparticle colloid in brown color. The results of the UV-Vis spectrophotometer showed the silver nanoparticles colloids spectrum at a wavelength of 420 nm with an absorbance value of 0.5. FTIR shows the reduction and shift of absorption peak in the hydroxyl functional group (-OH) at wavenumbers of 3323 cm-1 and the presence of absorption peaks at 560 cm-1. While, XRD pattern showed the specific crystallinity peaks of silver nanoparticles at 2θ: 33.24°; 39.98°; 61.23°; dan 79.13° respectively with the face-centered cubic crystal structure (FCC) and crystallite size of 15 nm. PSA analysis showed two specific peaks with an average size distribution silver nanoparticles of 43.5 nm and a PDI value of 0.4. Analysis of TEM shows the average particle size of 20 nm with a spherical particle shape.

SODIUM LAURETH SULFATE (SLS) DECORATED α-PbO NANOCRYSTALS: OPTICAL, STRUCTURE, AND MORPHOLOGY, PROPERTIES Tikarahayu Putri; Iwan Syahjoko Saputra; Anjar Hermadi Saputro; Yogi Nopiandi Permana; Yoki Yulizar; Sudirman Sudirman
Jurnal Sains Materi Indonesia Vol 22, No 2: APRIL 2021
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2021.22.3.6209

SODIUM LAURETH SULFATE (SLS) DECORATED α-PbO NANOCRYSTALS: OPTICAL, STRUCTURE, AND MORPHOLOGY PROPERTIES. The α-PbO nanocrystals were successfully decorated using sodium laureth sulfate (SLS) anionic surfactant. The method used is one-pot synthesis approach. The precursor used is lead nitrate (Pb(NO3)2). The UV-Vis spectrophotometer showed the absorption peak of α-PbO nanocrystals was seen at wavelength of 237 nm and an absorbance value of 0.7. The optical properties of PbO nanocrystals can be seen at the bandgap value of 4.2 eV. FT-IR spectroscopy showed the shift of absorption peak at the wavenumber of 1358 cm-1. XRD spectroscopy showed the crystals of PbO at diffraction angles (2θ) of 10-80o: 29.17, 32.54, 37.85, 39.62, 45.16, 46.21, 56.12, and 61.73 with miller indices of (111), (200), (201), (121), (220), (030), (311), and (032), respectively. The crystal size average of PbO was 56.32 nm. The results of PSA and PZC shows the particle size distribution of PbO is 71.5 nm with inter-particle charge of -25 mV. SEM-EDX data shows the PbO nanocrystals have an irregularly spherical with a compounds composition of Pb (83.12%) and O (16.88%). From the data of characterization, it can be concluded the PbO nanocrystals was successfully decorated using the surfactant anionic of sodium laureth sulfate.

GREEN SYNTHESIS NANOPARTIKEL ZnO MENGGUNAKAN MEDIA EKSTRAK DAUN TIN (Ficus carica Linn) Iwan Syahjoko Saputra; Siti Suhartati; Yoki Yulizar; Sudirman Sudirman
Jurnal Kimia dan Kemasan Vol. 42 No. 1 April 2020
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v42i1.5501

Tujuan penelitian ini adalah sintesis nanopartikel ZnO menggunakan metode green synthesis dengan memanfaatkan ekstrak daun tin (Ficus carica Linn) sebagai media. Gugus aktif yang terkandung dalam ekstrak daun tin berperan sebagai media sekaligus sumber basa alami dalam sintesis nanopartikel ZnO dan berpengaruh terhadap sifat optik, bentuk morfologi serta karakteristik nanopartikel ZnO. Hasil karakterisasi nanopartikel ZnO menggunakan Spektrofotometer UV-Vis menunjukkan puncak serapan pada panjang gelombang 260 nm dengan nilai absorbansi 0,6. Hasil UV-Vis DRS menunjukkan nilai bandgap nanopartikel ZnO sebesar 3,32 eV dan hasil karakterisasi XRD menunjukkan tiga puncak spesifik kristalinitas nanopartikel ZnO yaitu pada 2 teta: 30.710, 33.360, dan 37.200 dengan ukuran kristal 15,9 nm. FTIR menunjukkan adanya vibrasi ZnO pada bilangan gelombang 492 cm-1 dan puncak serapan gugus fungsi –OH pada bilangan gelombang 3501 cm-1, -C=O pada bilangan gelombang 2490 cm-1, C-O-H pada 1397 cm-1, dan gugus fungsi amina pada 913 cm-1. Hal ini mengindikasikan bahwa dalam ekstrak daun tin terdapat metabolit sekunder yang dapat berperan sebagai media dalam pembentukan nanopartikel ZnO. Hasil SEM-EDS menunjukkan bentuk morfologi nanopartikel ZnO berbentuk seperti kapas dengan perbandingan massa unsur Zn dan O adalah 30,24 % dan 69,76%. Hasil PSA dan PZC menunjukkan nanopartikel ZnO memiliki nilai PDI sebesar 0,739 dan distribusi rata-rata ukuran partikel sebesar 49,62 dengan nilai zeta potensial -23 mV.

The Synergy Effect of Azadirachtin and Minor Components of Neem Seed Oil on Antifeedant Activity of Spodoptera litura Arief Heru Prianto; NFN Budiawan; Yoki Yulizar; Partomuan Simanjuntak
Buletin Penelitian Tanaman Rempah dan Obat Vol 30, No 1 (2019): Buletin Penelitian Tanaman Rempah dan Obat
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/bullittro.v30n1.2019.27-34

Azadirachtin in neem oil (Azadirachta indica A.Juss) might have potential synergism effect with a minor compound in the neem oil as an antifeedant. This study aimed to determine the content of minor components that have the most significant contribution to the effect of synergy with the main component (azadirachtin) in antifeedant activity against Spodoptera litura. Neem oil was fractionated with n-hexane, ethyl acetate, and water. The antifeedant activity of three neem oil fractions was evaluated using the 4th instar of S. litura larvae. The bioassay was conducted using the choice leaf disc test with 2.5; 5; 10; and 20 % (v/v) concentrations of each fraction. The concentration of the fractions showed equal azadirachtin content, hence the antifeedant activity represented the effect of the minor component in the fraction. The best activity was shown by water fraction (84-100 %). Probit analysis of the antifeedant activity of all fractions showed that water fraction has the best effective inhibitory (EI50) at 1.0 %. The minor component in the water fraction was dominated by phenol compounds (48.5 %) which were suspected to synergize with the main component (azadirachtin) in increasing the antifeedant activity on S. litura. These results indicated the phenol compound in this fraction has the role in increasing azadirachtin antifeedant activity against S. litura.

Green Synthesis of Gold Nanoparticles using Aqueous Garlic (Allium sativum L.) Extract, and Its Interaction Study with Melamine Yoki Yulizar; Harits Atika Ariyanta; Lingga Abduracman
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 2 Year 2017 (August 2017)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Gold nanoparticles (AuNPs) have been successfully prepared by green synthesis method using aqueous extract of garlic with the Latin name of Allium sativum L. (ASL) as a reducing and stabilizing agents. Identification of active compounds in aqueous ASL extract was conducted by phytochemical analysis and Fourier transform infrared (FTIR) spectroscopy, while the synthesized AuNPs were characterized using UV-Vis spectrophotometer and transmission electron microscopy-selected area electron diffraction (TEM-SAED). The AuNPs formation was optimized at aqueous ASL extract concentration of 0.05%, HAuCl4 concentration of 2.0×10-4 M, and pH of 3.6. The optimized AuNPs was characterized using TEM, and has a spherical shape with particle size of 15±3 nm. The particles were also stable up until one month. The synthesized AuNPs has been studied its interaction with melamine, and showed the optimum pH of interaction at 3.6.

The Synthesis of Alginate-Capped Silver Nanoparticles under Microwave Irradiation Foliatini Foliatini; Yoki Yulizar; Mas Ayu Elita Hafizah
Journal of Mathematical and Fundamental Sciences Vol. 47 No. 1 (2015)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2015.47.1.3

Synthesis of silver nanoparticles (Ag-NP) was successfully performed within a few minutes by microwave irradiation of the precursor salt (AgNO3) and alginate mixed solution in one pot. Herein, alginate molecules acted as both a reducing and stabilizing agent for the preparation of the silver nanoparticles. The obtained nanoparticles were characterized by ultraviolet-visible (UV-Vis) spectroscopy, particle size analysis (PSA), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The pH and concentration ratio of the alginate/metal precursor salt greatly influenced the particle size and its distribution of Ag-NP. The higher the pH the higher the nucleation rate and the larger the electrostatic stabilization, while both of them were responsible for producing a smaller particle size and a narrower size distribution. A higher concentration ratio also yielded a smaller particle size and a narrower size distribution, but above the optimum ratio, the trend was conversely changed due to the reducing capability of the alginate, which was dominant above the optimum ratio, thus creating a high density of nuclei, allowing aggregation to occur. A lower ratio not only led to a higher tendency to produce larger particles, but also a higher probability of anisotropic particle shape formation due to the lack of reducing capability of the alginates.

The Synergy Effect of Azadirachtin and Minor Components of Neem Seed Oil on Antifeedant Activity of Spodoptera litura Arief Heru Prianto; NFN Budiawan; Yoki Yulizar; Partomuan Simanjuntak
Buletin Penelitian Tanaman Rempah dan Obat Vol 30, No 1 (2019): Buletin Penelitian Tanaman Rempah dan Obat
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/bullittro.v30n1.2019.27-34

Azadirachtin in neem oil (Azadirachta indica A.Juss) might have potential synergism effect with a minor compound in the neem oil as an antifeedant. This study aimed to determine the content of minor components that have the most significant contribution to the effect of synergy with the main component (azadirachtin) in antifeedant activity against Spodoptera litura. Neem oil was fractionated with n-hexane, ethyl acetate, and water. The antifeedant activity of three neem oil fractions was evaluated using the 4th instar of S. litura larvae. The bioassay was conducted using the choice leaf disc test with 2.5; 5; 10; and 20 % (v/v) concentrations of each fraction. The concentration of the fractions showed equal azadirachtin content, hence the antifeedant activity represented the effect of the minor component in the fraction. The best activity was shown by water fraction (84-100 %). Probit analysis of the antifeedant activity of all fractions showed that water fraction has the best effective inhibitory (EI50) at 1.0 %. The minor component in the water fraction was dominated by phenol compounds (48.5 %) which were suspected to synergize with the main component (azadirachtin) in increasing the antifeedant activity on S. litura. These results indicated the phenol compound in this fraction has the role in increasing azadirachtin antifeedant activity against S. litura.

GREEN SYNTHESIS NANOPARTIKEL ZnO MENGGUNAKAN MEDIA EKSTRAK DAUN TIN (Ficus carica Linn) Iwan Syahjoko Saputra; Siti Suhartati; Yoki Yulizar; Sudirman Sudirman
Jurnal Kimia dan Kemasan Vol. 42 No. 1 April 2020
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v42i1.5501

Tujuan penelitian ini adalah sintesis nanopartikel ZnO menggunakan metode green synthesis dengan memanfaatkan ekstrak daun tin (Ficus carica Linn) sebagai media. Gugus aktif yang terkandung dalam ekstrak daun tin berperan sebagai media sekaligus sumber basa alami dalam sintesis nanopartikel ZnO dan berpengaruh terhadap sifat optik, bentuk morfologi serta karakteristik nanopartikel ZnO. Hasil karakterisasi nanopartikel ZnO menggunakan Spektrofotometer UV-Vis menunjukkan puncak serapan pada panjang gelombang 260 nm dengan nilai absorbansi 0,6. Hasil UV-Vis DRS menunjukkan nilai bandgap nanopartikel ZnO sebesar 3,32 eV dan hasil karakterisasi XRD menunjukkan tiga puncak spesifik kristalinitas nanopartikel ZnO yaitu pada 2 teta: 30.710, 33.360, dan 37.200 dengan ukuran kristal 15,9 nm. FTIR menunjukkan adanya vibrasi ZnO pada bilangan gelombang 492 cm-1 dan puncak serapan gugus fungsi –OH pada bilangan gelombang 3501 cm-1, -C=O pada bilangan gelombang 2490 cm-1, C-O-H pada 1397 cm-1, dan gugus fungsi amina pada 913 cm-1. Hal ini mengindikasikan bahwa dalam ekstrak daun tin terdapat metabolit sekunder yang dapat berperan sebagai media dalam pembentukan nanopartikel ZnO. Hasil SEM-EDS menunjukkan bentuk morfologi nanopartikel ZnO berbentuk seperti kapas dengan perbandingan massa unsur Zn dan O adalah 30,24 % dan 69,76%. Hasil PSA dan PZC menunjukkan nanopartikel ZnO memiliki nilai PDI sebesar 0,739 dan distribusi rata-rata ukuran partikel sebesar 49,62 dengan nilai zeta potensial -23 mV.

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