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Rhodamine B Degradation by Nanosized Zeolitic Imidazolate framework-8 (ZIF-8)

Rhodamine B Degradation by Nanosized Zeolitic Imidazolate framework-8 (ZIF-8)

Michael Chin, Cecilia Cisneros, Stephanie M Araiza, Kevin M Vargas, Kristi M Ishihara, Fangyuan Tian

RSC Adv. 2018 Jul 29;8(47):26987-26997.

PMID: 30174827

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP81889	Rhodamine B		81-88-9	Price

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