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All Journal VALENSI Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Ilmu Dasar POSITRON Jurnal Riset Kimia Indonesian Journal of Pharmaceutical Science and Technology Jurnal Kelautan Tropis Journal Of Chemical Process Engineering (JCPE) ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Pure and Applied Chemistry Journal Of Chemical Process Engineering

Winda Rahmalia

1. Jurusan Kimia, Fakultas MIPA, Universitas Tanjungpura 2. Chemistry Insight Center Fakultas MIPA, Universitas Tanjungpura

Author-ID : 2589714

Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics

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Sintesis Dan Karakterisasi Kompleks Brazilin dari Ekstrak Kayu Secang (Caesalpinia sappan Linn) Serta Aplikasinya dalam Dye Sensitized Solar Cells (DSSC) Zulenda Zulenda; Uray Amira Naselia; Nico Gustian; Titin Anita Zaharah; Winda Rahmalia
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 1, May 2019
Publisher : Syarif Hidayatullah State Islamic University

Secang (Caesalpinia sappan Linn) merupakan tanaman endemik Kalimantan Barat yang mengandung pigmen berwarna merah brazilin. Dalam penelitian ini, brazilin diperoleh melalui proses maserasi dilanjutkan dengan partisi cair-cair, selanjutnya dikomplekskan dengan ion logam Cu, Mg, dan Zn untuk meningkatkan kinerjanya ketika digunakan sebagai sensitizer pada dye sensitized solar cell (DSSC). Pengompleksan dilakukan menggunakan media gliserol-air, sedangkan fabrikasi DSSC dilakukan menggunakan metode doctor blading. Hasil analisis FTIR terhadap ekstrak kayu secang menunjukkan adanya gugus fungsi O-H, C=O, C=C, dan C-H, yang merupakan gugus fungsional khas dari brazilin. Terbentuknya kompleks brazilin-Cu, brazilin-Mg, dan brazilin-Zn ditandai dengan menurunnya intensitas puncak dari C=O pada 1606 cm-1 dan –OH pada 3263 cm-1. Hasil analisis UV-Vis menunjukkan bahwa kompleks memiliki rentang panjang gelombang lebih lebar dan cenderung batokromik. DSSC yang menggunakan kompleks brazilin-Cu, brazilin-Mg, dan brazilin-Zn menghasilkan rendemen konversi energi maksimum pada 200 W/m2, berturut-turut sebesar 0.034 %, 0.030 %, dan 0.013 %, serta DSSC ekstrak kayu secang murni sebesar 0.029 %. Dengan demikian, penggunaan sensitizer berbasis kompleks logam-brazilin dapat meningkatkan efisiensi DSSC. Kata kunci: Brazilin, DSSC, fotosensitizer, kayu secang, kompleks. Secang (Caesalpinia sappan Linn) is an endemic plant in West Kalimantan that contains Brazilin red pigments. In this study, brazilin was obtained through a maceration process carried out by a liquid-liquid partition, then complexed with metal ions to improve the performance of compilation used as a sensitizer on dye-sensitized solar cell (DSSC). Complexation is carried out using glycerol-water media, while DSSC fabrication is carried out using the doctor blading method. The results of FTIR analysis of secang wood extract showed the presence of a functional group O-H, C=O, C=C, and C-H, which are typical functional groups of brazilin. The formation of the brazilin-Cu, brazilin-Mg, and brazilin-Zn complexes is characterized by an increase in peak intensity of C=O at 1606 cm-1 and O-H at 3263 cm-1. The results of the UV-Vis analysis show that the complex has a wider wavelength and uses batochromic. DSSCs that use the brazilin-Cu, brazilin-Mg, and brazilin-Zn complexes that complement each other produce efficiencies of 0.034%, 0.030%, and 0.013%, and DSSC pure secang wood extract of 0.029%. The efficiency of the brazilian metal-complex when compared with brazilin, the efficiency increases, so that the maximum efficiency obtained by the Cu-brazilin sensitizer is equal to 0.034%. Keywords: Brazilin, DSSC, photosensitizer, secang wood, complex.

Production of Ceramic Membrane Based on Acid- and Alkali-Activated Metakaolinite as Cooling Material for Monocrystalline Silicon Solar Cell Septiani Septiani; Wahyu Febri Ramadhy; Angie Islammiyati; Winda Rahmalia
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 2, November 2019
Publisher : Syarif Hidayatullah State Islamic University

Ceramic membrane based on acid- and alkali-activated metakaolinite has been produced. It was tested as a cooling material for monocrystalline silicon solar cells. Membrane was made by several stages, such as calcination of natural kaolinite at 600 oC for 6 hours to obtain metakaolinite, activation of metakaolinite by concentrated HCl and KOH, and preparation of ceramic membrane. Kaolinite, metakaolinite, and activated metakaolinite were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier Transform Infra-red (FTIR), and gas sorption analyzer (GSA). Diffractogram of XRD showed that there was a structural change between activated metakaolinite and natural kaolinite. XRF analysis indicated that the Si/Al of HCl activated metakaolinite was three times higher than natural kaolinite. Activated metakaolinite was made into membrane by adding a binder, then heated at 800 °C for 6 hours. PV cells with and without cooling material were then analyzed their electrical performances. It was found that the maximum energy conversion yield of PV cells without using cooling material was 2.30%, while the maximum energy conversion yield of PV cells with cooling material of meta-kaolinite activated by HCl and KOH were respectively 2.72% and 2.94%.

Co-Authors Adhitiyawarman, Adhitiyawarman Andi Hairil Alimuddin Angie Islammiyati Annisa Bella Maharani Ayu Widya Sari Deni Pranata Dwi I. Prayitno Dwi Imam Prayitno Dwi Imam Prayitno Esi Amelyanti Fajar Nugraha Fajriaty, Inarah Fara Chitra Gusrizal Gusrizal Hadi Kurniawan Hairunnisa Hairunnisa Hamdil Mukhlishin Imelda H. Silalahi Imelda Hotmarisi Silalahi Inda Putrinesia Intan Syahbanu Intan Syahbanu Intan Syahbanu Lia Destiarti M Syahwandi Mas Inda Putrinesia Mauludia Mauludia Nia Dahlia Nico Gustian Nimas Ade Kusdayanti Nur Ridha An Nisa Nurlina Nurlina Nurlina Nurlina, Nurlina Nurul Asyikin Puji Ardiningsih R. Rudiyansyah Ramadhy, Wahyu Febri Risya Sasri Sabrina Maulidya Amir Septiani Septiani Septiani Septiani Septiani Septiani Septiani Shofiyani, Anis Siti Nani Nurbaeti Thamrin Usman Thamrin Usman Titin Anita Zahara Titin Anita Zahara Titin Anita Zaharah Uray Amira Naselia Uray Amira Naselia Uray Amira Naselia Utin Widiatannur Wahyu Febri Ramadhy Yoga Pratama Zulenda Zulenda

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