Issue 47, 2018

Rhodamine B degradation by nanosized zeolitic imidazolate framework-8 (ZIF-8)

Abstract

Adsorption and photodegradation of rhodamine B by ZIF-8 nanocrystals were studied using spectroscopic techniques coupled with density functional theory (DFT) cluster calculations. A fast adsorption rate was observed in the dark, but upon exposure to visible light or UV irradiation the adsorption rate noticeably increased. Although several studies previously reported this phenomenon involving bulk ZIF-8 powder, this is the first mechanistic study to our knowledge that demonstrates adsorption and degradation of rhodamine B by nanosized ZIF-8 under various light conditions. The combined study of N2 sorption pore analysis and surface-sensitive X-ray photoelectron spectroscopy (XPS) confirmed the surface adsorption was mainly due to the open metal sites and surface groups of nanoporous ZIF-8. The fluorescence studies suggested ZIF-8 nanocrystals were able to generate hydroxyl radicals in water but only under UV illumination. The work presented here provides an insight into understanding nanoscale metal–organic frameworks (MOFs) in the removal of organic molecules from wastewater.

Graphical abstract: Rhodamine B degradation by nanosized zeolitic imidazolate framework-8 (ZIF-8)

Supplementary files

Article information

Article type
Paper
Submitted
22 apr 2018
Accepted
19 iyl 2018
First published
30 iyl 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 26987-26997

Rhodamine B degradation by nanosized zeolitic imidazolate framework-8 (ZIF-8)

M. Chin, C. Cisneros, Stephanie M. Araiza, K. M. Vargas, K. M. Ishihara and F. Tian, RSC Adv., 2018, 8, 26987 DOI: 10.1039/C8RA03459A

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