Thermally treated zeolitic imidazolate framework-8 (ZIF-8) for visible light photocatalytic degradation of gaseous formaldehyde
- Authors
- Wang, Tianqi; Wang, Yufei; Sun, Mingzhe; Hanif, Aamir; Wu, Hao; Gu, Qinfen; Ok, Yong Sik; Tsang, Daniel C. W.; Li, Jiyang; Yu, Jihong; Shang, Jin
- Issue Date
- 14-7월-2020
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- CHEMICAL SCIENCE, v.11, no.26, pp.6670 - 6681
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL SCIENCE
- Volume
- 11
- Number
- 26
- Start Page
- 6670
- End Page
- 6681
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/54399
- DOI
- 10.1039/d0sc01397h
- ISSN
- 2041-6520
- Abstract
- The development of wide-spectrum responsive photocatalysts for efficient formaldehyde (HCHO) removal is highly desired yet remains a great challenge. Here we successfully converted zeolitic imidazolate framework-8 (ZIF-8), one of the most well-studied metal-organic frameworks (MOFs), from routine ultraviolet-driven to novel broad-spectrum-driven photocatalyst via a facile thermal treatment. The isocyanate groups (-N=C=O) formed in the thermally treated ZIF-8 (ZIF-8-T) is crucial in enabling the superior photocatalytic performance in formaldehyde degradation. Specifically, the best-performing ZIF-8-T sample showed around 2.1 and 9.4 times the HCHO adsorption amount and the solar photocatalytic degradation rate, respectively, of pristine ZIF-8. In addition, ZIF-8-T exhibited visible light (lambda >= 400 nm) photocatalytic HCHO degradation performance, photo-converting 72% and nearly 100% of 20 ppm and 10 ppm HCHO within 1 hour, respectively. This work affords new insights and knowledge that inspire and inform the design and development of MOF-based photocatalysts with broad-spectrum responses for efficient air purification operations.
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Collections - College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
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