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All Journal JURNAL HUTAN LESTARI Sinergi REKAYASA Chemistry Indonesian Journal of Chemical Research Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Jurnal Teknologi Kimia Unimal Jurnal Ilmu dan Inovasi Fisika Journal of The Indonesian Society of Integrated Chemistry Journal Of Chemical Process Engineering
Wahyuningtyas, Aulia
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering 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 Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Pembuatan Hidrogel Berbasis Carboxymethyl Cellulose (CMC) dan Pektin sebagai Adsorben Logam Cu dengan Metode Freeze-Thaw Dewi, Nurazizah Melani; Maelan, Nabilla Maharani; Andini, Sri; Perdani, Meka Saima; Wahyuningtyas, Aulia
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 6 No. 2 (2024): JPPL, September 2024
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M), Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v6i2.2412

Abstract

Water pollution is a serious global problem caused by increasing industrialization and urbanization. The heavy metal Cu is one of the dangerous compounds that causes water pollution because it has a toxic effect on humans and can cause mental retardation, anemia, hypertension, etc. Removal of Cu metal in water can be done using CMC and Pectin-based hydrogel adsorbents. Hydrogels are hydrophilic polymer composites with a physically well-defined three-dimensional (3D) network and chemically responsive functional groups, which enable the hydrogel to easily capture metal ions without dissolving. The hydrogel synthesized via the Freeze-Thaw method has greater elastic characteristics. The adsorption properties were investigated by two isotherm models and five kinetic models. FTIR analysis proved that the –OH group was detected freely due to the interaction between CMC and pectin, the COOH group with the highest ability to bind metals, and other groups, namely C=O, C-O, and C-O-C. BET analysis shows that the hydrogel has a surface area of 1.685 m²/g and is classified as type 1 on the isotherm chart, referring to the dominance of micropores in a material or materials with mesopore content close to micropores. The optimum conditions in the adsorption process are at a concentration of 223 ppm, using the Langmuir isotherm model with an adsorption efficiency of 20,84%. The highest adsorption capacity was at a concentration of 74 ppm which occurred at 120 minutes, using a Pseudo 2nd Order kinetic model with an adsorption efficiency of 85,07%.
Karakteristik ZnO Nanorod Berstruktur Seperti Landak Sebagai Fotoanoda Pada Dye-Sensitized Solar Cell (DSSC) Yuliasari, Fitri; Aeni, Alfieta Rohmaful; Wahyuningtyas, Aulia; Umam, Hilman Imadul; Perdani, Meka Saima; Pambudi, Teguh; Hidayat, Rahmat
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 8, No 1 (2024)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v8i1.49327

Abstract

Penelitian ini bertujuan membuat sel surya jenis Dye-sensitized solar cell  (DSSC) dengan memanfaatkan ZnO nanorod (ZnO-NR) berstruktur seperti landak sebagai lapisan fotoanoda. Fotoanoda ZnO-NR dibuat dari lapisan penumbuh (seed layer) ZnO nanopartikel (ZnO-NP) diatas substrat ITO menggunakan metode hidrotermal dengan variasi perbandingan konsentrasi larutan penumbuh (growth solution) hexamethylenetetramine (HMTA):Zn(NO3)2·6H2O adalah 0,1 : 0,1 M dan 0,25 : 0,05 M. Morfologi ZnO nanorod dipelajari melalui karakterisasi Scanning Electron Microscopy (SEM) yang menunjukan bahwa penambahan ZnO-NP pada lapisan penumbuh akan menghasilkan ZnO-NR berstruktur seperti landak. Karakterisasi X-Ray Diffraction (XRD) menunjukkan bahwa ZnO-NR menghasilkan pola puncak difraksi yang sesuai dengan bidang ZnO dan berbentuk hexagonal wurzite. Hasil pengukuran Spektroskopi UV-Vis menunjukkan penyerapan dye oleh ZnO-NR pada rentang UV hingga cahaya tampak. Pada penelitian ini pembuatan DSSC difabrikasi dengan struktur ITO/ZnO-NR/D358-dye/mosalyte/Platina/FTO. Parameter-parameter DSSC kemudian dipelajari melalui pengukuran arus-tegangan (I-V) sementara itu rekombinasi muatan yang terjadi, dipelajari melalui karakterisasi Intensity Modulated Photovoltage Spectroscopy (IMVS). Efisiensi yang dihasilkan mencapai 1,65% dari fotoanoda ZnO-NR dengan konsentrasi larutan penumbuh 0,25:0,05 M yang menghasilkan diameter ZnO-NR berukuran lebih kecil sehingga berpotensi meningkatkan penyerapan dye dan memberikan performa DSSC yang lebih baik.
Co-Authors Aeni, Alfieta Rohmaful Aldiansyah, Wildan Alwardah, Chairunnisa Alya, Neng Via Nurjanahtul Andini, Sri Anwari, Luluatun Ayu, Dinda Laras Bagastama, Bima Dessy Agustina Sari Dewi, Nurazizah Melani Erlangga, Reza Hibatulwafi, Chintya Mahjati Kusuma, Daffa Meifan Maelan, Nabilla Maharani Perdani, Meka Saima Rahmat Hidayat Teguh Pambudi Utami, Wasistianna Vera Pangni Fahriani Yuda, Dimas YULIASARI, FITRI