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Restina Bemis, Restina
Laboratorium Material Universitas Andalas
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Impact of magnetite on Fe3O4/Activated Carbon (AC)/ZnO Nanocomposite for Photodegradation of Rhodamine B Bemis, Restina; Marlinda, Lenny; Rahmi; Pratiwi, Nurul; Wibimanyu, Putu Adityo; Lia Anggresani
Chempublish Journal Vol. 9 No. 2 (2025): Chempublish Journal (July - December)
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v9i2.47812

Abstract

Rhodamine B is an organic dye commonly used in the textile industry, but it is toxic. Therefore, a photodegradation method using Fe3O4/activated carbon (AC)/ZnO nanocomposite is necessary to address environmental issues caused by rhodamine B. The Fe3O4/AC/ZnO nanocomposite has been successfully synthesized using the sonication method. Iron sand is used as a source of magnetite (Fe3O4), coconut shells as a source of activated carbon, and Zinc nitrate as a source of ZnO. XRF results show that the Fe content in iron sand is 74.10%. The ratio of Fe3O4 addition used in Fe3O4/AC/ZnO nanocomposite is 0:1:1; 1:1:1; 2:1:1; 3:1:1; 4:1:1. XRD characterization shows that the 1:1:1 ratio of Fe3O4/AC/ZnO nanocomposite has the smallest crystal size of 48.17 nm. The addition ratio of Fe3O4 does not affect the structure of the formed Fe3O4/AC/ZnO nanocomposite. Fe3O4/AC/ZnO nanocomposite is formed at 2theta 30.23°; 35.60°; 57.11°; and 62.83° for Fe3O4, peak broadening at 26.72° and ~44.71 for AC, and 31.82°; 34.47°; 36.30°; 47.59°; 56.63°; 62.89° and 67.98° for ZnO. SEM results show particle sizes of 57.95 nm for ZnO and 42.74 nm for Fe3O4/AC/ZnO 1:1:1 nanocomposite. VSM showed saturation magnetism of 4.41 emu/g for Fe3O4/AC/ZnO 1:1:1 nanocomposite and 28.8 emu/g for Fe3O4. The photocatalytic test showed that the Fe3O4/AC/ZnO 1:1:1 nanocomposite had the best % degradation of rhodamine B, at 96.1%, under sunlight.
PENINGKATAN KUALITAS MINYAK DARI PLASTIK POLIPROPILEN DENGAN MENGGUNAKAN BENTONIT/KARBON AKTIF Muis, Lince; Suparjo, Suparjo; Bemis, Restina; Afrianto, Mhd Ficky
Chempublish Journal Vol. 1 No. 1 (2016): Chempublish Journal
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.821 KB)

Abstract

Bentonit dan karbon adalah bahan yang biasanya menyerap zat warna dan pengotor pada minyak. Kemampuan bentonit dan karbon dapat ditingkatkan dengan aktivasi untuk memperbesar luas permukaan. Tujuan dari penelitian ini adalah mengadsorpsi minyak plastic untuk meningkatkan kualitasnya. Adsorpsi ini mengunakan variable warna, sulfur dan nilai kalor. Proses aktivasi karbon mengunakan akitivator KOH sedangkan bentonit menggunakan pemanasan 110 0C. Hasil penelitian ini menunjukan bahwa pencampuran karbon aktif dan bentonit memberikan pengaruh terhadap nilai kalor dan kandungan sulfur setelah proses adsorbsi pada minyak plastic yang dihasilkan. Kata Kunci: Bentonit, karbon, minyak plastik, bensin, adsorpsi.
Sintesis dan karakterisasi fotokatalis ZnO/karbon aktif dan aplikasinya pada degradasi rhodamin B Bemis, Restina; Nelson; Ngatijo; Nurjanah, Siti; Maghviroh, Nur'aini
Chempublish Journal Vol. 4 No. 2 (2019): Chempublish Journal
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v4i2.7936

Abstract

Telah dilakukan sintesis dan karakterisasi ZnO/karbon aktif sebagai fotokatalis untuk mendegradasi rhodamin B. Fotokatalis ZnO/karbon aktif disintesis menggunakan motode solid state menggunakan prekursor Zn(NO3)2.4H2O dan karbon aktif dari tempurung kelapa. Pola difraksi XRD menunjukkan bahwa fotokatalis ZnO/karbon aktif memiliki struktur heksagonal wurzite yang sesuai dengan standar COD- Inorg No. 96-900-4180 dengan kristal berukuran 0,12 µm. Hasil UV-Vis menunjukkan ZnO memiliki nilai energi celah pita (band gap energy, Eg) sebesar 3,12 eV dan hasil SEM menunjukkan morfologi permukaan berbentuk tidak beraturan dan mangalami mengalami aglomerasi. Analisis EDS pada ZnO dan ZnO/karbon aktif memberikan persentase massa elemen Zn= 59,4%; O= 38,6% dan Zn= 66,9%; O=23,6%; C=7,8%. Hasil uji aktivitas fotokatalitik menunjukkan bahwa kondisi optimum degradasi rhodamin B 10 ppm memerlukan 200 mg fotokatalis ZnO/karbon aktif dan waktu radiasi sinar UV selama 90 menit. Fotokatalis ZnO/karbon aktif efektif dalam mendegradasi zat warna rhodamin B pada kondisi optimumnya dengan persentase degradasi sebesar 86,84%. Dari data analisis LC-MS menunjukkan terjadi degradasi molekul rhodamin B (m/z= 442,88) membentuk senyawa intermediet dengan perbandingan rasio massa dan muatan sebesar 387,30; 359,01; 331,12; 132,79 dan 117,03 m/z.
Nanofikasi Fraksi Tanah Gambut untuk Modifikator Nanomagnetit/AH-Kitosan sebagai Kandidat Penanggulangan Pencemaran Zat Warna Ngatijo, Ngatijo; Bemis, Restina; Ihsan, Mahya; Gusmaini, Nurul; Hidayat, Salim; Basuki, Rahmat
Chempublish Journal Vol. 5 No. 2 (2020): Chempublish Journal
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v5i2.11105

Abstract

The nanomagnetite/HA-Chitosan adsorbent has been successfully synthesized by the co-precipitation method. HA was synthesized from the peat soils of Geragai village, Tanjung Jabung Timur, Jambi province and chitosan isolated from marine animal shell waste around the city of Jambi. The results of FT-IR analysis showed that nanomagnetite/AH-chitosan has a spectra which was combination of the characteristic spectra of magnetite, HA and chitosan. Morphological analysis using SEM showed that nanomagnetite/AH-chitosan was in the form of fractal agglomerates. TEM image of magnetite/AH-chitosan showed that magnetite/AH-chitosan has nano scale magnetite core particles with a size between 4-22 nm. Crystallinity analysis showed that magnetite/AH-chitosan has 2θ characteristics of magnetite i.e., 30.1°, 35.4°, 43.1°, 57.0°, 62.68° and 74.5°. The magnetic saturation strength (Ms) decreased from 80.23 (magnetite) to 30.63 (magnetite/AH-chitosan) due to the coating of AH-chitosan on magnetite which was still effectively attracted by the external magnet with 96% effectiveness of adsorption of 25 mL Methylene Blue 10 mg/L.
Co-Authors Afrianto, Muhammad Ficky Al Faruqi, Fiqri Ali Djamhuri Alim, Khairul Endi Adriansyah Gusmaini, Nurul Hariestya Viareco Heriyanti Heriyanti, Heriyanti Hidayat, Salim Ihsan, Mahya Indra Lasmana Tarigan Kharisma, Tiara Lenny Marlinda Lia Anggresani Lince Muis Lince Muis Madyawati Latief Muhaimin Muhaimin Muhammad Irhash Shalihin Nelson Ngatijo Ngatijo Ngatijo Novesar Jamarun Nurul Pratiwi Puspitasari, Ratih Dyah Rahmat Basuki Rahmi Rovilla El Maghviroh Safitri, Ayu Nadila Siti Nurjanah Suparjo Susanto, Nindita Clourisa Amaris Sutrisno, Sutrisno Syukri Arief Wibimanyu, Putu Adityo