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All Journal Alchemy : Journal of Chemistry Jurnal Kimia Riset Jurnal Penelitian Pendidikan IPA (JPPIPA) Sains & Matematika Unesa Journal of Chemistry

Pirim Setiarso

Universitas Negeri Surabaya

Author-ID : 3743294

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Materials Science & Nanotechnology Mathematics Physics

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PEMBUATAN ELEKTRODA KERJA GRAPHENE OXIDE TERMODIFIKASI NANO BENTONIT UNTUK ANALISIS ASAM NIKOTINAT SECARA VOLTAMETRI SIKLIK MAKING OF GRAPHENE OXIDE NANO BENTONITE MODIFIED WORKING ELECTRODE FOR ANALYSIS NICOTINIC ACID USING CYCLIC VOLTAMMETRY Nerry Puspita Sari; Pirim Setiarso
Unesa Journal of Chemistry Vol 9 No 3 (2020)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Pada penelitian ini telah dilakukan penelitian pengukuran asam nikotinat menggunakan elektroda kerja Graphene oxide termodifikasi nano bentonit dengan metode voltametri siklik. Elektroda kerja Graphene oxide termodifikasi nano bentonit dibuat dengan cara mencampurkan Graphene oxide, parafin, dan nano bentonit dengan perbandingan 3:5:2, 3:4:3, 3:3:4, 3:2:5. Parameter optimasi yang diuji yaitu kondisi optimum (pH, waktu deposisi, dan laju pindai), komposisi modifier nano bentonit yang ditambahkan. Elektroda kerja Graphene oxide termodifikasi nano bentonit pada kondisi pengukuran optimum digunakan untuk menentukan analisis asam nikotinat secara voltametri siklik. Hasil penelitian menunjukkan komposisi terbaik diperoleh 3:3:4 dengan nilai puncak katodik -0.00375A. pH optimum diperoleh 5 dengan nilai puncak katodik -0.00337A. Waktu deposisi optimum diperoleh selama 5 detik dengan nilai puncak katodik -0.00144A dan laju pindai optimum diperoleh 100 mV/detik dengan nilai puncak katodik -0.00272A. Perbandingan persen perolehan kembali asam nikotinat secara voltametri siklik dengan elektroda kerja Graphene oxide termodifikasi nano bentonit lebih besar yaitu 96.164% dibandingkan dengan metode HPLC adalah 88.332%.Kata kunci : graphene oxide, nano bentonit, asam nikotinat, voltametri siklik In this research modified Graphene oxide electrode with nano bentonite has been prepared, for determination of nicotinic acid using cyclic voltammetry. Graphene oxide electrode modified by nano bentonite was made by with mixing Graphene oxide, paraffin, and nano bentonite with 3:5:2, 3:4:3, 3:3:4, 3:2:5. The observed parameters includes pH, deposition time, scan rate at modified Graphene oxide electrode with nano bentonite, and composition of modifier in modified Graphene oxide Graphene oxide electrode with nano bentonite. The results showed the best composition obtained 3:3:4 with an peak of cathodic value of -0.00375A. The optimum pH obtained 5 with an peak of cathodic value of -0.00337A.The optimal deposition time obtained for 5 seconds with an peak of cathodic value of -0.00144A and optimal scanning rate obtained 100 mV/second with an peak of cathodic value -0.00272A. Comparison of the results of nicotinic acid recovery using Graphene oxide nano bentonite modified electrode using the cyclic voltammetry method is greater that is 96.164% compared to the method HPLC is 88.332%.Key words: graphene oxide, nano bentonite, nicotinic acid, cyclic voltammetry

PENGARUH VARIASI pH TERHADAP PENGUKURAN ASAM OKSALAT DENGAN ELEKTRODA GRAPHENE OXIDE TERMODIFIKASI NANOBENTONIT SECARA SIKLIK VOLTAMETRI THE EFFECT OF VARIOUS pH VALUES ON MEASUREMENT OXALIC ACID USING NANOBENTONITE MODIFIED GRAPHENE OXIDE ELECTRODE BY CY Pirim Setiarso; Eka Candra Saputra
Unesa Journal of Chemistry Vol 9 No 3 (2020)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Telah dipelajari pengaruh pH pada pengukuran asam oksalat menggunakan elektroda Graphene oxide termodifikasi nanobentonit dengan metode siklik voltametri.Graphene oxide dan nanobentonitmasing-masing telah berhasil disintesis metode Improved Hummer dan Sonochemical. Elektroda dibuat dari campuran Graphene oxide:nanobentonit:parafin dengan perbandingan 3:2:5; 3:3:4; 3:4:3; 3:5:2. Variasi pH yang dipelajari yaitu 3,5; 4; 4,5; 5; dan 5,5. Kedua material tersebut di karakterisasi dengan FTIR dan PSA. Spektrum FTIR Graphene oxide membuktikan bahwa Graphene oxide telah berhasil disintesis dengan memunculkan gugus –OH pada bilangan gelombang3445cm-1., tekukan C=C pada bilangan gelombang1622cm-1, regangan gugus C-O pada bilangan gelombang 1225cm-1 dan regangan gugus epoksi C-O-C pada bilangan gelombang 1042cm-1. Spektrum FTIR nanobentonit menunjukkan serapan kuat pada bilangan gelombang 1028cm-1 menunjukkan regangan gugus Si-O-Si, pada bilangan gelombang 793 cm-1 menunjukkan regangan gugus Al-O-Si. Sementara data PSA menunjukan bahwa distribusi partikel graphene oxide sebanyak 5% berukuran 0,61μm. Data PSA menunjukkan bahwa distribusi partikel nanobentonit sebanyak 5 % berukuran 1.09μm. Hasil penentuan elektroda komposisi terbaik yaitu pada perbandingan komposisi 3:5:2 dengan arus puncak anodik sebesar 3,29x10-3 A. Pengukuran asam oksalat terbaik pada kondisi pH larutan 4,5 dengan arus puncak anodik sebesar 3,76x10-3 A.Kata kunci : voltametri siklik, elektroda Graphene oxide termodifikasi nanobentonit, asam oksalat The effect of pH on the measurement of oxalic acid using nanobentonite modified Graphene oxide electrodes with the cyclic voltammetry method. Graphene oxide and nanobentonite have been successfully synthesized by the Improved Hummer and Sonochemical methods. Electrodes are made from a mixture of Graphene oxide: nanobentonite: paraffin in a ratio of 3:2:5; 3:3:4; 3:4:3; 3:5:2. The pH variations studied were 3.5; 4; 4,5; 5; and 5.5. Both materials were characterized by FTIR and PSA. The FTIR spectrum of Graphene oxide proves that Graphene oxide has been successfully synthesized by raising the -OH group at wave number 3445cm-1. bend C=C at wave number 1622cm-1, the strain of C-O group at wave number 1225cm-1, and strain of epoxy group C-O-C at wave number 1042cm-1. The nanobentonite FTIR spectrum shows strong absorption at wave number 1028cm-1 indicating strain of the Si-O-Si group, at wave number 793 cm-1 indicating the strain of the Al-O-Si group. While the PSA data show that the distribution of graphene oxide particles as much as 5% measuring 0.61μm. PSA data show that the distribution of 5% nanobentonite particles is 1.09μm. The results of the determination of the best composition electrode are at a ratio of 3:5:2 with an anodic peak current of 3.29x10-3 A. The best measurement of oxalic acid at the pH of the solution 4.5 with an anodic peak current of 3.76x10-3 A.Key words: cyvlic voltammetry, nanobentonite modified Graphene oxide electrode, oxalic acid

Studi Elektrokimia Klorofil dan Antosianin Sebagai Fotosensitizer DSSC (Dye-Sensitized Solar Cell) Rimbi Rodiyana Sova; Pirim Setiarso
Unesa Journal of Chemistry Vol 10 No 2 (2021)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Abstrak. Pada penelitian ini dilakukan analisis elektrokimia ekstrak klorofil dan antosianin dari daun suji (Pleomele Angustifolia) dan kulit buah naga merah (Hylocereus Polyrhizus) sebagai sensitizer pada Dye-Sensitized Solar Cell (DSSC). Klorofil dari daun suji dan antosianin dari kulit buah naga merah diekstraksi menggunakan pelarut etanol. Karakterisasi klorofil dan antosianin dilakukan dengan menggunakan spektrofotometri UV-Visible untuk mengetahui serapan panjang gelombang dan celah pita energi, karakterisasi elektrokimia klorofil dan antosianin dilakukan menggunakan voltametri siklik. Pada penelitian ini dihasilkan klorofil dengan serapan panjang gelombang sebesar 663 nm dan 439 nm sedangkan antosianin pada panjang gelombang 532 nm. Analisis celah pita energi (energy gap) klorofil menghasilkan 2,51 eV dan antosianin 2,1 eV. Karakterisasi elektrokimia menunjukkan bahwa energi HOMO (Highest Occupied Molecular Orbital) pada klorofil sebesar -5,68 eV dan pada antosianin sebesar -5,16 eV. Energi LUMO (Lowest Unoccupied Molecular Orbital) pada klorofil sebesar -3,17 eV dan pada antosianin sebesar -3,06 eV. Hasil ini menunjukkan bahwa ekstrak klorofil dan antosianin dari daun suji dan kulit buah naga merah cukup menjanjikan untuk digunakan sebagai fotosensitizer pada DSSC. Kata kunci : antosianin, DSSC, elektrokimia, klorofil Abstract. In this study, an electrochemical analysis of chlorophyll and anthocyanin extracts from suji (Pleomele Angustifolia) leaves and red dragon fruit skin (Hylocereus Polyrhizus) was conducted as a sensitizer to Dye-Sensitized Solar Cell (DSSC). Chlorophyll from suji leaves and anthocyanins from the skin of red dragon fruit were extracted using ethanol as a solvent. Chlorophyll and anthocyanin characterization was carried out by UV-Visible spectrophotometry to see the absorption of wavelength and energy bandgaps, electrochemical characterization of chlorophyll and anthocyanins was carried out using cyclic voltammetry. In this study, chlorophyll was produced with absorption wavelengths of 663 nm and 439 nm while anthocyanins were at 532 nm wavelengths. Analysis of the energy gap of chlorophyll yields 2.51 eV and anthocyanins 2.1 eV. The electrochemical characterization showed that the energy of HOMO (Highest Occupied Molecular Orbital) in chlorophyll was -5.68 eV and in anthocyanins was -5.16 eV. The energy of LUMO (Lowest Unoccupied Molecular Orbital) in chlorophyll is -3.17 eV and in anthocyanins is -3.06 eV. These results indicate that chlorophyll and anthocyanin extracts from suji leaves and red dragon fruit peel are sufficient to be used as photosensitizers in DSSC. Key words: anthocyanin, chlorophyll, DSSC, electrochemical

Co-Authors Andianita, Tri Dyah Ayu Ilfiana Buchari Buchari Didin Mujahidin Eka Candra Saputra Elsa Rishda Hariningtias ERLITA PUTRI, PUPUT Harsono, Rifanda Viantiano I GUST MADE SANJAYA Ihda Shoumi Nurdini Indah Tri Wahyuni Indra Noviandri INGGRIANI, FIRMA Khoiriyah, Nuril Lenny Yuanita Maria Monica Sianita MAY LUKMANA, KUMININGSIH Mulyono, Dymarda Indra Santoso Nerry Puspita Sari Nita Kusumawati Nita Kusumawati Nuril Khoiriyah Perdana, Raga Agung RAIDAH RUSNADI, WINDA Rimbi Rodiyana Sova Samik Samik Samik Samik Suyatno Sutoyo Taufik Hidayatulloh Tukiran Tukiran Wachid, Rochman Wahono Widodo

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