Hierarchical ZIF-decorated nanoflower-covered 3-dimensional foam for enhanced catalytic reduction of nitrogen-containing contaminants

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Lin J.-Y., Lee J., Oh W.D., Kwon E., Tsai Y.-C., Lisak G., Phattarapattamawong S., Hu C., Lin K.-Y.A.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2021

วารสาร: Journal of Colloid and Interface Science (0021-9797)

Volume number: 602

หน้าแรก: 95

หน้าสุดท้าย: 104

จำนวนหน้า: 10

นอก: 0021-9797

eISSN: 0021-9797

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108714621&doi=10.1016%2fj.jcis.2021.05.098&partnerID=40&md5=00403b89c1dc6c0e2f5fc2c67b505958

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Metal Organic Frameworks (MOFs) represent a promising class of metallic catalysts for reduction of nitrogen-containing contaminants (NCCs), such as 4-nitrophenol (4-NP). Nevertheless, most researches involving MOFs for 4-NP reduction employ noble metals in the form of fine powders, making these powdered noble metal-based MOFs impractical and inconvenient for realistic applications. Thus, it would be critical to develop non-noble-metal MOFs which can be incorporated into macroscale and porous supports for convenient applications. Herein, the present study proposes to develop a composite material which combines advantageous features of macroscale/porous supports, and nanoscale functionality of MOFs. In particular, copper foam (CF) is selected as a macroscale porous medium, which is covered by nanoflower-structured CoO to increase surfaces for growing a cobaltic MOF, ZIF-67. The resultant composite comprises of CF covered by CoO nanoflowers decorated with ZIF-67 to form a hierarchical 3D-structured catalyst, enabling this ZIF-67@Cu foam (ZIF@CF) a promising catalyst for reducing 4-NP, and other NCCs. Thus, ZIF@CF can readily reduce 4-NP to 4-AP with a significantly lower Ea of 20 kJ/mol than reported values. ZIF@CF could be reused over 10 cycles and remain highly effective for 4-NP reduction. ZIF@CF also efficiently reduces other NCCs, such as 2-nitrophenol, 3-nitrophenol, methylene blue, and methyl orange. ZIF@CF can be adopted as catalytic filters to enable filtration-type reduction of NCCs by passing NCC solutions through ZIF@CF to promptly and conveniently reduce NCCs. The versatile and advantageous catalytic activity of ZIF@CF validates that ZIF@CF is a promising and practical heterogeneous catalyst for reductive treatments of NCCs. © 2021 Elsevier Inc.

คำสำคัญ

Catalytic reduction, Cobalt, MOFs, Nitrophenol, ZIF-67