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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Al-Hikmah Teknosains: Media Informasi Sains dan Teknologi Elkawnie KOVALEN: Jurnal Riset Kimia Indonesia Chimica Acta Al-Kimia Chimica et Natura Acta Indonesian Journal of Chemistry Walisongo Journal of Chemistry Dharma Bakti Jurnal de jure Jurnal Kesehatan Panrita Husada Jurnal Comprehensive Health Care Welfare State Jurnal Hukum JURNAL REKAYASA KIMIA & LINGKUNGAN
Arfiani Nur
Universitas Islam Negeri Alauddin Makassar
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Nursing Physics Social Sciences Other

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PREPARASI SEL SURYA TERSENSITISASI DYE (DSSC) DARI EKSTRAK KULIT UBI JALAR UNGU (Ipomoea batatas L.) Aisyah, Aisyah; Jusnia, Jusnia; Nur, Arfiani; Abubakar, A. Nurfitriani; Ibrahim Patunrengi, Iswadi
Teknosains Vol 17 No 1 (2023): Januari-April
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/teknosains.v17i1.32860

Abstract

Various dyes have been investigated for Dye-Sensitized Solar Cell application. The ethanol extract from peels of purple sweet potato Ipomoea batatas L. is commonly used as a dye in TiO2 semiconductors. However, in this study the dyes were extracted stepwise by three solvents with graded polarity; n-hexane, ethyl acetate, and methanol. Each extract and the mixture are used as the sensitizers for DSSC. This aimed to compare the efficiency value to obtain the highest solar energy conversion into electricity. The DSSC performance was studied based on the phytochemical analysis, UV-Vis and FTIR spectrum, and the semiconductor morphology by SEM analysis. The mixed extract produced the highest cell efficiency of 0,10 with Vmax and Imax values of 276 mV and 25,7 mA, respectively.
Sintesis Kemosensor Anion Senyawa 4-(2,6-difenil-Piridin-4-Il)-2-Metoksi-Fenol Dari Vanilin Nur, Arfiani; Purwono, Bambang
Jurnal Rekayasa Kimia & Lingkungan Vol 12, No 1 (2017): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v12i1.4957

Abstract

Telah dilakukan sintesis kemosensor anion senyawa 4-(2,6-difenil-piridin-4-il)-2-metoksi-fenol (DPMF). Sintesis senyawa target DPMF dilakukan melalui senyawa antara kalkon dengan rendemen reaksi 77%. Uji sebagai sensor anion dilakukan dalam pelarut DMSO-air terhadap anion F-, Cl-, Br-, CN- dan H2PO4-. Senyawa DPMF ini menghasilkan perubahan warna dari tidak berwarna menjadi kuning pada penambahan anion CN-. Analisis spektrofotometer UV-vis pada senyawa DPMF menghasilkan perubahan mak = 320 nm ke mak = 370 nm pada penambahan anion CN-. Limit deteksi terhadap anion CN- sebesar 4,11x10-6M. Senyawa ini juga dapat berperan sebagai kemosensor fluoresen dengan sistem ON-OFF.
Synthesis and Characterization of Bagasse (Saccharumofficinarum L.) Silica Gel Modified Diphenylcarbazone Rismawaty Sikanna; Dwi Nur Assyifah Rajmah; Kurnia Ramadani; Musafira Musafira; Arfiani Nur; Amalyah Febryanti
Elkawnie Vol. 7 No. 1 (2021)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v7i1.9239

Abstract

Abstract: Bagasse is a solid waste from the sugar cane milling process in the sugar industry. The waste can be used as an ingredient in making silica gel which functions as an adsorbent. This can be done by changing its chemical structure composition to increase its role and function. This study aims to determine the characteristics of silica gel synthesized from bagasse (Saccharumofficinarum L.) and modified using diphenylcarbazone as much as 0.24 g with sol-gel technique. The characterization results obtained from Fourier transform infrared (FTIR) analysis of diphenylcarbazone modified silica gel, namely the absorption of Si-OH, Si-O-Si groups supported by the appearance of C꞊O, C꞊N, NH, and N꞊N groups. Characterization using x-ray diffraction (XRD) showed a change in amorphous silica to crystals, with the results obtained showing a crystal size of 41.468 nm.Abstrak: Ampas tebu merupakan limbah padat yang berasal dari proses penggilingan tebu pada produksi gula. Limbah tersebut dapat dimanfaatkan sebagai bahan pembuatan silika gel yang berfungsi sebagai adsorben. Hal tersebut dapat dilakukan dengan mengubah komposisi struktur kimianya agar dapat meningkatkan peran dan fungsinya. Penelitian ini bertujuan untuk mengetahui karakteristik silika gel yang disintesis dari ampas tebu (Saccharumofficinarum L.) dan dimodifikasi menggunakan difenilkarbazon sebanyak 0,24 gr dengan teknik sol-gel. Diperoleh hasil karakterisasi dari analisis fourier transform infrared (FTIR) terhadap silika gel termodifikasi difenilkarbazon menunjukkan adanya serapan gugus Si-OH, Si-O-Si yang didukung dengan pembentukan gugus C꞊O, C꞊N, N-H, dan N꞊N. Karakterisasi menggunakan difraksi sinar-x (XRD) menunjukkan perubahan silika amorf menjadi kristal dengan hasil yang diperoleh memperlihatkan ukuran kristal sebesar 41,468 nm.
Implikasi Larangan Ekspor Bauksit Oleh Pemerintah Indonesia Terhadap Kerjasama Indonesia Dan European Union Comprehensive Economic Partnership Agreement Kurnia, Kana; Arfiani, Nur; Hadrian, Reza
Jurnal de jure Vol 17, No 2 (2025): Jurnal De Jure
Publisher : Fakultas Hukum Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/jurnaldejure.v17i2.1151

Abstract

The ban on bauxite exports shows the government’s consistency in encouraging downstream mining products, by processing bauxite domestically, added value can be enjoyed and has the potential to increase state revenue, but on the other hand there are international obligations that need to be followed by Indonesia related to the ban on exports of mining products. This article aims to analyze Indonesia's bauxite export ban policy according to international trade law and its impact on Indonesia - the European Union Comprehensive Economic Partnership Agreement (IEU-CEPA). To compile this article, normative research was conducted, where secondary data was obtained through literature examination. Then, a conceptual approach was used to conduct a qualitative descriptive analysis of literature sources relevant to the research subject. The results of this study indicate that Indonesia will most likely fail to prove that the bauxite export ban that has been implemented is justified according to the General Agreement on Tariffs and Trade 1994 (GATT 1994), one of the reasons is because the Indonesian government does not provide alternative policies related to the bauxite export ban and also the initial purpose of the bauxite export ban was because the government wanted to encourage domestic bauxite processing and refining, this is also evidenced by the absence of restrictions on domestic production and consumption, and also Indonesia must be prepared to face the latest lawsuits from the European Union or other countries considering that Indonesia is believed to have violated several articles in the GATT and the IEU-CEPA negotiations.  
Co-Authors Abubakar, A. Nur Fitriani Abubakar, A. Nurfitriani Abubakar, Andi Nur Fitriani Ahmad Fudhail  Majid Ahyar Ahmad Aisyah Aisyah Aisyah Aisyah Amalyah Febryanti Artati Asdinar Asri Asriani Ilyas Asriani Ilyas Bambang Purwono Bambang Purwono Burhanuddinnur, Muhammad Dwi Nur Assyifah Rajmah Dyah Wulandhari Sulthan Dzikra Arwie, Dzikra Fadliah, Fadliah Febryanti, Amalyah Fera Agustin Firnanelty, Firnanelty Hadrian, Reza Hajrah Hajrah Halisa, Halisa Harningsih Karim Iin, Iin Novianty Indah Raya Jusnia, Jusnia Kurnia Ramadani Kurnia, Kana Kurniati, Nunung Maming Gaffar, Maming Maria Cecilia Lezama Escalante Maswati Baharuddin Muliyani Munadi, Rachmin Musafira Mustofa Mustofa Nofia Sari, Okta Nurfadillah Patunrengi, Iswadi Ibrahim Paulina Taba Rahmatia Syam Rahmiani Gani Rezeki, Rezeki Ridwan, Irham Pratama Rismawaty Sikanna Salnus, Subakir Samsinar Samsinar Sitti Chadijah Sitti Chadijah Sulistiani Jarre Suriani Suriani Sutarno Sutarno Syarifah Rabiatul Adawiah Titik Andriani Titik Andriani Titik Andriani, Titik Tri Widayati Putri Ulil Asmi Ummi Zahra, Ummi Ummy Yatul Jannah Yasser, M Yusril Yusril