Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/88148
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Title: Thermally treated zeolitic imidazolate framework-8 (ZIF-8) for visible light photocatalytic degradation of gaseous formaldehyde
Authors: Wang, TQ
Wang, YF
Sun, MZ
Hanif, A
Wu, H
Gu, QF
Ok, YS
Tsang, DCW 
Li, JY
Yu, JH
Shang, J
Issue Date: 14-Jul-2020
Source: Chemical science, 14 July 2020, v. 11, no. 26, p. 6670-6681
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.
Publisher: Royal Society of Chemistry
Journal: Chemical science 
ISSN: 2041-6520
EISSN: 2041-6539
DOI: 10.1039/d0sc01397h
Rights: This journal is © The Royal Society of Chemistry 2020
This article is licensed under a Creative Commons Attibution-NonCommercial 3.0 Unported Licence (https://Creative Commons.org/licenses/by-nc/3.0/)
The following publication Wang, T. Q., Wang, Y. F., Sun, M. Z., Hanif, A., Wu, H., Gu, Q. F., . . . Shang, J. (2020). Thermally treated zeolitic imidazolate framework-8 (ZIF-8) for visible light photocatalytic degradation of gaseous formaldehyde. Chemical Science, 11(26), 6670-6681 is available at https://dx.doi.org/10.1039/d0sc01397h
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