Sains Malaysiana 53(2)(2024): 409-41

http://doi.org/10.17576/jsm-2024-5302-14

Carbon Dioxide Adsorption on Iron (III) Oxide Pillarized Na-Montmorillonite

(Penjerapan Karbon Dioksida pada Ferum (III) Oksida Terpilar Na-Montmorilonit)

MUHAMMAD NAUVAL FARRAS RUSSAMSI¹, FIRMAN JOSHUA NAINGGOLAN¹, TRIATI DEWI KENCANA WUNGU^1,2,3,* & SUPRIJADI^1,2,3

¹Graduate Program of Nanotechnology, Institut Teknologi Bandung, Jalan Ganesha 10 Bandung, West Java, Indonesia

²Physics Department, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10 Bandung, West Java, Indonesia

³Research Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung, Jalan Ganesha 10 Bandung, West Java, Indonesia

Diserahkan: 6 September 2023/Diterima: 19 Januari 2024

Abstract

Iron (III) oxide (Fe₂O₃) pillarized Na-montmorillonite (NaMMT) was prepared by ion-exchanging and calcining three different concentrations (0.025, 0.05, and 0.075 M) of Fe(OH)₃ with NaMMT. The obtained materials were then examined for its ability to capture carbon dioxide, using thermogravimetric methods. The structural, compositional, and textural changes caused by pillarization were also examined using XRD, XRF, FTIR, and BET-BJH. The results showed that NaMMT-0.025 (pillared using 0.025 M of Fe(OH)₃) and NaMMT-0.075 exhibit superior adsorption capacity compared to NaMMT, with NaMMT-0.025 having the greatest capacity. By contrast, NaMMT-0.05 registers a decrease in the amount of CO₂ adsorbed, compared to NaMMT. Using XRF, it was shown that the amount of Fe₂O₃ present in the samples correspond to the concentration of Fe(OH)₃ used in ion-exchange. XRD results shows that the interlayer space of NaMMT barely changed after addition of Fe₂O₃. Using FTIR, successful pillarization of Fe2O3 is confirmed, and by combining it with BET-BJH, it shows that addition of Fe2O3 could enhance carbon capture by creating favourable pore structures. Overall, it shows that adding an appropriate amount of Fe₂O₃ to montmorillonite will enhance CO₂ adsorption.

Keywords: Adsorption; carbon dioxide; montmorillonite; pillarization

Abstrak

Ferum (III) oksida (Fe₂O₃) terpilar dalam Na-montmorilonit (NaMMT) telah disiapkan dengan cara menukar ion tiga kepekatan berbeza Fe(OH)₃ (0.025, 0.05, dan 0.075 M) dengan NaMMT, kemudian memanggangnya. Bahan yang diperoleh kemudian diperiksa untuk keupayaannya menangkap karbon dioksida menggunakan kaedah termogravimetri. Perubahan struktur dan komposisi akibat pilari pun juga telah diperiksa menggunakan XRD, XRF, FTIR dan BET-BJH. Hasil kajian menunjukkan bahawa NaMMT-0.025 (dipilar menggunakan 0.025 M Fe(OH)₃) dan NaMMT-0.075 menunjukkan kapasiti penyerapan yang lebih unggul berbanding dengan NaMMT, dengan NaMMT-0.025 menunjukkan kapasiti terbesar. Sebaliknya, NaMMT-0.05 menunjukkan penurunan jumlah CO₂ yang diserap berbanding dengan NaMMT. Menggunakan XRF, didapati jumlah Fe₂O₃ dalam sampel sepadan dengan kepekatan Fe(OH)₃ yang digunakan dalam pertukaran ion. Hasil XRD menunjukkan ruang antara lapisan pada NaMMT hanya berubah sedikit disebabkan oleh penambahan Fe₂O₃. Menggunakan FTIR, pemilaran Fe₂O₃ disahkan berjaya dan dengan menggabungkannya dengan hasil BET-BJH, didapati bahawa penambahan Fe₂O₃ dalam jumlah yang sesuai membina struktur liang yang menggalakkan penyerapan CO₂. Secara keseluruhannya, ini menunjukkan bahawa penambahan jumlah Fe₂O₃ yang sesuai ke dalam montmorilonit akan meningkatkan penyerapan CO₂.

Kata kunci: Karbon dioksida; montmorilonit; pemilaran; penyerapan

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*Pengarang untuk surat-menyurat; email: triati@itb.ac.id