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All Journal Bulletin of Chemical Reaction Engineering & Catalysis JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Jurnal Kartika Kimia Dedikasi: Jurnal Pengabdian kepada Masyarakat Indonesian Chimica Letters

Muhammad Reza

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Jember

Author-ID : 1300626

Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Environmental Science Materials Science & Nanotechnology Social Sciences Other

Published : 7 Documents Claim Missing Document

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Articles

bcl Morphology Formation Strategy on Nanostructured Titania via Alkaline Hydrothermal Treatment Fry Voni Steky; Veinardi Suendo; Rino Rakhmata Mukti; Didi Prasetyo Benu; Muhammad Reza; Damar Rastri Adhika; Viny Veronika Tanuwijaya; Ashari Budi Nugraha
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 3 Year 2019 (December 2019)
Publisher : Department of Chemical Engineering - Diponegoro University

Titanium dioxide (TiO2) is a semiconductor material that plays an important role in photocatalysis. Bicontinuous concentric lamellar (bcl) is an interesting morphology with an open channel pore structure that has been successfully synthesized on silica-based materials. If bcl morphology can be applied in TiO2 system, then many surface properties of TiO2 can be enhanced, i.e. photocatalytic activity. A simple and effective strategy has been demonstrated to transform aggregated and spherical TiO2 particles to bcl morphology via alkaline hydrothermal route. Alkaline hydrothermal treatment successfully transforms TiO2 particle surface to have bcl morphology through swelling with ammonia then followed by phase segregation process. We proposed this strategy as a general pathway to transform the particle surface with any shape to have bcl morphology.

Preparation of Polyaniline Emeraldine Salt for Conducting-Polymer-Activated Counter Electrode in Dye Sensitized Solar Cell (DSSC) using Rapid-Mixing Polymerization at Various Temperature Auliya Nur Amalina; Veinardi Suendo; Muhammad Reza; Phutri Milana; Risa Rahmawati Sunarya; Damar Rastri Adhika; Viny Veronika Tanuwijaya
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 3 Year 2019 (December 2019)
Publisher : Department of Chemical Engineering - Diponegoro University

Polyaniline Emeraldine Salt (PANI ES) as a conductive polymer has been used as a Pt-free counter electrode materials in DSSC. In this study, polymerization temperature was varied at relatively high temperature from 308 to 348 K with respect to the standard low polymerization temperature at 273 K. The synthesis held in varied high-temperature to study the effect of synthesis condition resulted to the performance as counter electrode in DSSC. The effect of high-temperature synthesis condition gives interesting results, the FTIR-ATR spectra show the presence of vibrational modes of phenazine structure obtained at high polymerization temperature, indicate the changing in the chain geometry. Raman Spectroscopy shows the decrease of the I1194/I1623 intensity ratio that can be interpreted that the degree-of-freedom of C-H bond bending mode decreases in the benzenoid ring, while the stretching mode degree-of-freedom along the chain is preserved or increased. The electrical conductivity profile has changed from metal-like at low-temperature into a semiconductor-like profile at high-temperature. Scanning Electron Microscope images reveals that a change in the morphology of PANI ES with temperature. At low-temperature (273 K) the morphology has a globular shape, while at high-temperature it tends to form nanorod structure. DSSC device with highest efficiency is attained for PANI ES polymerized at 273 K (1.91%) due to its high conductivity. The lowest efficiency is observed in device using PANI ES synthesized at 328 K (1.15%) due to its low conductivity due to the formation of phenazine structure.

Penerapan Response Surface Methodology dalam Optimasi Kondisi Proses Ekstraksi Antosianin pada Limbah Kulit Kakao dengan Metode Maserasi Menggunakan Pelarut Etanol Istiqomah Rahmawati; Boy Arief Fachri; Nurtsulutsiyah Nurtsulutsiyah; Yakub Hendrikson Manurung; Muhammad Reza; Meta Fitri Rizkiana; Helda Wika Amini
JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Vol 6, No 1 (2022)
Publisher : State University of Malang or Universitas Negeri Malang (UM)

Antosianin dengan konsentrasi tinggi terdapat dalam kulit kakao. Tujuan dari penelitian ini adalah untuk mengidentifikasi hubungan antara variabel input dan mengembangkan model prediksi yang digunakan dalam optimasi kondisi proses ekstraksi antosianin. Ekstraksi antosianin dalam kulit kakao dilakukan menggunakan metode maserasi. Variable proses ekstraksi yang dioptimasi meliputi ukuran partikel (0,105; 0,125; 0,149; 0,177; 0,25 mm), rasio bahan/pelarut (0,0045; 0,0125; 0,0375; 0,0625; 0,0795 g/mL), dan waktu (7,5; 24; 48; 72; 79 jam). Program Design Expert vs11 dengan Response Surface Methodology (RSM) Box-Behnken Design digunakan dalam penelitian dan dilakukan pemilihan kondisi proses dari kombinasi faktor-faktor yang menghasilkan respon yang optimal. Hubungan antar variabel terhadap respon konsentrasi antosianin yang dimodelkan :Y=0,2129-0,0483A+0,0816B+0,0069C-0,0219AB-0,0271AC+0,0174BC+0,0298A2-0,0349B2 +0,0504C2(A adalah ukuran partikel; B adalah rasio kulit kakao:pelarut; dan C adalah waktu).Nilai respon optimal konsentrasi antosianin adalah 0,479 M dengan kondisi ukuran partikel pada proses ekstraksi 0,105 mm, rasio kulit kakao/etanol adalah 0,0625 g/mL, dan waktu ekstraksi adalah 72 jam

Implementasi Pengolahan Limbah Cair Industri Tempe Berbasis Eco-Friendly Dan Zero Waste pada UKM Tempe Di Desa Jambesari Kabupaten Bondowoso Bekti Palupi; Istiqomah Rahmawati; Meta Fitri Rizkiana; Muhammad Reza; Boy Arief Fachri; Reswara Musyafa; Regita Gustiayu Pramisti Maharani; Mohammad Nor
Dedikasi:Jurnal Pengabdian kepada Masyarakat Vol 3, No 1 (2022): Jurnal Dedikasi
Publisher : Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31479/dedikasi.v3i1.208

Salah satu industri tempe yang ada di Desa Karang Malang, Jambesari, Bondowoso, Jawa Timur yaitu Industri Tempe Fatimah. Tempe Fatimah mendapatkan respon positif dari masyarakat sehingga produksinya pun meningkat. Peningkatan produksi tentunya berimbas dengan meningkatnya limbah yang dihasilkan sehingga perlu dilakukan pengelolaan limbah agar tidak menimbulkan isu permasalahan lingkungan. Secara umum, permasalahan mitra terkait yang teridentifikasi meliputi 3 hal yaitu (1) proses pembuatan tempe menghasilkan limbah cair yang dihasilkan mempunyai karakteristik bau tidak sedap dan berwarna yang dapat mencemari lingkungan atau kualitas air sekitar; (2) limbah cair yang dihasilkan belum dilakukan penanganan dan pengolahan secara khusus; dan (3) belum mempunyai alat pengolah limbah cair tempe sehingga pengolahan limbah cair industri tempe belum ditangani secara tepat. Oleh karena itu, beberapa solusi yang dapat ditawarkan kepada mitra usaha industri tempe Fatimah antara lain (1) memberikan pengetahuan atau wawasan tentang kandungan kimia, dampak dan bahaya limbah cair industri tempe terhadap lingkungan dan kehidupan manusia; (2) memberikan pengetahuan atau wawasan tentang metode dan teknologi pengolahan limbah yang dapat diaplikasikan dalam menangani limbah cair industri tempe; dan (3) meningkatkan keterampilan mitra usaha melalui penggunaan dan perawatan Teknologi Tepat Guna Mesin Pengolah Limbah Cair Tempe sebagai solusi pencemaran limbah cair tempe pada lingkungan hidup.

Effect of Zeolite Concentration on Hydrogel Characteristics of Arrowroot-Based Starch-G-Poly(Acrylic Acid)/Zeolite Composite Achmad Sjaifullah; Beny Akhmat Saputra; I Nyoman Adiwinata; Agung Budi Santoso; Busroni; Muhammad Reza
Indonesian Chimica Letters Vol. 1 No. 2 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember

This study aims to synthesize a hydrogel zeolite composite of arrowroot starch graft copolymerized with acrylic acid through a radical polymerization reaction in a water. Various scenarios were tested using different natural zeolite concentration to determine the impact on swelling/water absorption of the composite. The resulting product was a solid gel-the test results showed that the swelling increased as the ratio of starch to acrylic acid decreased. Increased starch concentrations generally lead to decreased water absorption (swelling capacity). Adding a zeolite improved swelling to some extent and the optimum zeolite concentration was 60%. The increased concentration of zeolite also hardened the hydrogel composite. The highest swelling in the hydrogel composite of starch-g-poly(acrylic acid)/zeolite 60% is 1056.25 g.g-1. FTIR analysis of functional groups was conducted to determine differences in the IR spectra of arrowroot starch, acrylic acid, hydrogels, zeolites, and composite hydrogel. Si-O signal appearing on the IR spectra of hydrogel composite with wave number 1030 cm-1 indicates that composite hydrogel with zeolite was synthesized

Effect of pH and Incubation Time on Dissolved Nitrogen During Autolityc Degradation of Chicken Intestine Eldiani Aulia; Achmad Sjaifullah; Wuryanti Handayani; Busroni; Ika Oktavianawati; Muhammad Reza
Indonesian Chimica Letters Vol. 2 No. 1 (2023)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/icl.v2i1.372

Chicken intestine is a part of internal organs, which are rich in protein and protease enzymes. The protease enzyme could self-degrade (autolytic degradation process) proteins in the chicken intestine at an appropriate pH and incubation time. This process produces a shorter chain polypeptide having a higher solubility protein called protein hydrolysates. Protein hydrolysates have shown a good impact in foods and health applications. In this study, the autolytic degradation of chicken intestine was carried out to obtain protein hydrolysates. The effect of pH and incubation time on the dissolved nitrogen (%N) and protein content ([protein]) in hydrolysate from the autolytic degradation of chicken intestine explained in this paper. The incubation pH used in this study was 2.5, 3.5, 5.5., and 6.3 while the the incubation time was 0, 6, 12, and 18 h. Chicken intestine was incubated for 18 h at several different pHs, and the % N and protein content were determined by using Formol titration and Bradford methods, respectively, within 6 h intervals. It was obtained the % N and [protein] content increase at pH 2.5 and 3.5 during 18 h of incubation time and they were decreased at a higher pH. The optimum % N and [protein] content were 5.98±0.51 % and 25.3±0.04 mg mL-1, respectively, obtained at pH of 2.5 during 18 h incubation time.

Effect of Time Variation on Chlorophyll Concentration in Cocoa Leaf Extraction using the UAE (Ultrasonic Assisted Extraction) Method Istiqomah Rahmawati; Nadhilah Shabrina; Boy Arief Fachri; Helda Wika Amini; Bekti Palupi; Meta Fitri Rizkiana; Nurtsulutsiyah Nurtsulutsiyah; Shima Nuril Pradipta; Diza Raudhatul Afwal; Muhammad Reza
Jurnal Kartika Kimia Vol 5 No 1 (2022): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v5i1.97

Until now, Cocoa (Theobroma cacao L.) plantation is a sector that has been continuously cultivated. Cocoa leaves contain chlorophyll, which is an important pigment in photosynthesis as sunlight absorber. The aim of this study is to determine the effect of extraction time to the concentration of chlorophyll in cocoa leaves. The extraction time was varied from 5 to 25 min with constant variables, namely power and ratio of raw materials. In this study, Ultrasonic Assisted Extraction (UAE) method was used due to its effectiveness. The concentration of obtained chlorophyll was determined by using UV-Vis spectrophotometry. The optimum extraction time was 15 min producing concentration of chlorophyll a of 9.39 mg/L, chlorophyll b of 4.78 mg/L, and total chlorophyll of 14.16 mg/L. Keywords: Chlorophyll, Cocoa Leaves, UV-Vis Spectrophotometry, Ultrasonic Assisted Extraction

Co-Authors Achmad Sjaifullah Agung Budi Santoso Ashari Budi Nugraha Auliya Nur Amalina Bekti Palupi Bekti Palupi Benu, Didi Prasetyo Beny Akhmat Saputra Boy Arief Fachri Boy Arief Fachri Busroni Busroni, Busroni Damar Rastri Adhika Diza Raudhatul Afwal Eldiani Aulia Fry Voni Steky Helda Wika Amini Helda Wika Amini I Nyoman Adi Winata Ika Oktavianawati Istiqomah Rahmawati Istiqomah Rahmawati Meta Fitri Rizkiana Meta Fitri Rizkiana Mohammad Nor Nadhilah Shabrina Nurtsulutsiyah Nurtsulutsiyah Nurtsulutsiyah Nurtsulutsiyah Phutri Milana Regita Gustiayu Pramisti Maharani Reswara Musyafa Rino Rakhmata Mukti Risa Rahmawati Sunarya Shima Nuril Pradipta Veinardi Suendo Viny Veronika Tanuwijaya Wuryanti Handayani Yakub Hendrikson Manurung

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