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All Journal Indonesian Journal of Halal Research Halal Research Journal Labatila: Jurnal Ilmu Ekonomi Islam Bulletin of Chemical Reaction Engineering & Catalysis Sunan Kalijaga Journal of Physics Analit: Analytical And Environmental Chemistry
Imelda Fajriati
Department of Chemistry, State Islamic University Sunan Kaliaga, Jl. Marsda Adisucipto Yogyakarta 55281
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Physics Other

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EFEKTIVITAS FOTODEGRADASI ZAT WARNA ALIZARINE RED-S MENGGUNAKAN OKSIDATOR HIDROGEN PEROKSIDA (H2O2) DAN FOTOKATALIS TiO2 Nugroho, Rizky Tejo; Fajriati, Imelda
Analit : Analytical and Environmental Chemistry Vol. 2, No. 02 October (2017) Analit : Analytical and Environmental Chemistry
Publisher : Jurusan Kimia FMIPA Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/aec.v2i2.2017.p

Abstract

Penelitian ini mempelajari efektivitas fotodegradasi Alizarine Red-S adanya variabel senyawa oksidator, waktu kontak, massa katalis dan pH. Pengaruh konsentrasi oksidator (H2O2) dilakukan dengan mereaksikan zat warna dan H2O2 konsentrasi 1%, 3%, 6%, 9% dan 12% menggunakan fotokatalis TiO2. Hasil fotodegradasi dianalisis menggunakan ANOVA 1 Faktor. Pengaruh waktu kontak dilakukan dengan mereaksikan zat warna dan H2O2menggunakn fotokatalis TiO2 dengan variasi waktu kontak 30, 40, 50, 60 dan 70 menit. Pengaruh massa fotokatalis TiO2 dipelajari dengan mereaksikan zat warna dan H2O2 menggunakan  fotokatalis TiO2 dengan massa 10, 20, 30 dan 40 mg. Pengaruh pH dipelajari dengan mereaksikan zat warna dan H2O2 menggunakan fotokatalis TiO2 dengan pH 6, 8 dan 10. Hasil fotodegradasi dari masing-masing pengaruh dianalisis menggunakan ANOVA 2 Faktor. Hasil penelitian menunjukkan bahwa, konsentrasi H2O2 berpengaruh signifikan terhadap fotodegradasi zat warna karena nilai F hitung > F tabel yaitu 26,38994 > 4,964603. Waktu kontak juga berpengaruh signifikan terhadap fotodegradasi zat warna karena nilai F hitung > F tabel yaitu 6,878603 > 6,388233. Untuk variasi massa fotokatalis TiO2 tidak berpengaruh signifikan terhadap fotodegradasi zat warna karena nilai F hitung < F tabel yaitu 1,920771 < 9,276628. Selanjutnya, variasi pH tidak berpengaruh signifikan terhadap fotodegradasi zat warna karena nilai F hitung < F tabel yaitu 0,606747 < 19.
Green Synthesis of ZnO Nanoparticles using Aloe Vera Extract and Xanthan Gum as Modifier for Photocatalytic Degradation of Anionic and Cationic Dye in Aqueous Solution Fajriati, Imelda; Widiakongko, Priyagung Dhemi; Krisdiyanto, Didik; Hermawati, Heti
Bulletin of Chemical Reaction Engineering & Catalysis 2025: Just Accepted Manuscript and Article In Press 2025
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20495

Abstract

This research employed a green synthesis approach to produce zinc oxide (ZnO) nanoparticles, using Aloe vera latex extract as both the natural reducing and stabilizing agent. To improve particle dispersion and suppress agglomeration, Xanthan gum was employed as a biopolymeric modifier. The ZnO nanoparticles were synthesized under ambient conditions without the need for surfactants or hazardous chemicals. Characterization through FTIR, XRD, SEM, TEM, and UV–Vis diffuse reflectance spectroscopy demonstrated that the synthesized ZnO nanoparticles were highly crystalline and adopted a hexagonal wurtzite structure. The incorporation of xanthan gum significantly reduced the crystallite size, enhanced surface homogeneity, and increased the optical band gap energy from 3.19 eV to 3.39 eV. Photocatalytic activity was evaluated using Remazol Yellow (anionic dye) and Rhodamine B (cationic dye) under UV light irradiation. The ZnO-AL/XG nanocomposite exhibited superior photocatalytic performance compared to ZnO synthesized without xanthan gum. This enhanced activity was attributed to improved nanoparticle dispersion, reduced recombination rates of photogenerated charge carriers, and better surface interaction with dye molecules. From the recycling study of ZnO-AL/Xg and ZnO-AL, it has been observed that the photocatalyst is still able to remove the color of the RY and RB solution up to 3 times of use with results above 50% of photodegradation percentage. The findings highlight the potential of Aloe vera–xanthan gum–based synthesis as a sustainable and efficient strategy for producing ZnO nanomaterials applicable in wastewater treatment.
Co-Authors Agung Abadi Kiswandono Atika Yahdiyani Ikhsani Didik Krisdiyanto Fajriana, Nur Hasani Frida Agung Rakhmadi, Frida Agung Haryarta, Gusfianang Hermawati, Heti Kartika, Betania Khamidinal Khamidinal Monitasari, Annisa Nafisah, Basmah Nugroho, Rizky Tejo Puspitaningrum, Ria Rahman, Rian Adi Setia Rahmaningrum, Nadia Rini, Rika Sulistyo Rosadi, Nisrina Nabila Rosadi, Yusi SITI MARIAM Subba, Jas Raj Widiakongko, Priyagung Dhemi Zamhari, Muhammad