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Photocatalytic Biocidal Coatings Featuring Zr6Ti4-Based Metal–Organic Frameworks

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.2c03060· OSTI ID:2480902
 [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [3];  [1];  [2];  [1]
  1. Northwestern University, Evanston, IL (United States)
  2. University of Chicago, IL (United States)
  3. University of Minnesota, Minneapolis, MN (United States)

The world is currently suffering socially, economically, and politically from the recent pandemic outbreak due to the Coronavirus Disease 2019 (COVID-19), and those in hospitals, schools, and elderly nursing homes face enhanced threats. Healthcare textiles, such as masks and medical staff gowns, are susceptible to contamination of various pathogenic microorganisms, including bacteria and viruses. Here, metal–organic frameworks (MOFs) can potentially address these challenges due to their tunable reactivity and ability to be incorporated as porous coatings on textile materials. Here, we report how incorporating titanium into the zirconium-pyrene-based MOF NU-1000, denoted as NU-1012, generates a highly reactive biocidal photocatalyst. This MOF features a rare ligand migration phenomenon, and both the Ti/Zr center and the pyrene linker act synergistically as dual active centers and widen the absorption band for this material that results in enhanced reactive oxygen species (ROS) generation upon visible light irradiation. Additionally, we found the ligand migration process is generally applicable to other csq topology Zr-MOFs. Importantly, NU-1012 can be easily incorporated onto cotton textile cloths as a coating, and the resulting composite material demonstrates fast and potent biocidal activity against Gram-negative bacteria (E. coli), Gram-positive bacteria (S. epidermidis), and T7 bacteriophage virus with up to a 7-log (99.99999%) reduction within one hour under simulated daylight.

Research Organization:
Northwestern University, Evanston, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Defense Threat Reduction Agency; National Science Foundation (NSF); Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource
Grant/Contract Number:
FG02-99ER14999; SC0012702; FG02-03ER15457
OSTI ID:
2480902
Alternate ID(s):
OSTI ID: 1978482
Journal Information:
Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 27 Vol. 144; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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