In this section
@article{Alotaibi:2021:10.1021/acsami.1c00304,
author = {Alotaibi, AM and Promdet, P and Hwang, GB and Li, J and Nair, SP and Sathasivam, S and Kafizas, A and Carmalt, CJ and Parkin, IP},
doi = {10.1021/acsami.1c00304},
journal = {ACS Applied Materials and Interfaces},
pages = {10480--10489},
title = {Zn and N codoped TiO2 thin films: photocatalytic and bactericidal activity.},
url = {http://dx.doi.org/10.1021/acsami.1c00304},
volume = {13},
year = {2021}
}
TY - JOUR
AB - We explore a series of Zn and N codoped TiO2 thin films grown using chemical vapor deposition. Films were prepared with various concentrations of Zn (0.4-2.9 at. % Zn vs Ti), and their impact on superoxide formation, photocatalytic activity, and bactericidal properties were determined. Superoxide (O2•-) formation was assessed using a 2,3-bis(2-methoxy-4-nitro-5-sulfophenyl)-5-[(phenylamino)carbonyl]-2H-tetrazolium sodium salt (XTT) as an indicator, photocatalytic activity was determined from the degradation of stearic acid under UVA light, and bactericidal activity was assessed using a Gram-negative bacterium E. coli under both UVA and fluorescent light (similar to what is found in a clinical environment). The 0.4% Zn,N:TiO2 thin film demonstrated the highest formal quantum efficiency in degrading stearic acid (3.3 × 10-5 molecules·photon-1), while the 1.0% Zn,N:TiO2 film showed the highest bactericidal activity under both UVA and fluorescent light conditions (>3 log kill). The enhanced efficiency of the films was correlated with increased charge carrier lifetime, supported by transient absorption spectroscopy (TAS) measurements.
AU - Alotaibi,AM
AU - Promdet,P
AU - Hwang,GB
AU - Li,J
AU - Nair,SP
AU - Sathasivam,S
AU - Kafizas,A
AU - Carmalt,CJ
AU - Parkin,IP
DO - 10.1021/acsami.1c00304
EP - 10489
PY - 2021///
SN - 1944-8244
SP - 10480
TI - Zn and N codoped TiO2 thin films: photocatalytic and bactericidal activity.
T2 - ACS Applied Materials and Interfaces
UR - http://dx.doi.org/10.1021/acsami.1c00304
UR - https://www.ncbi.nlm.nih.gov/pubmed/33595295
UR - https://pubs.acs.org/doi/10.1021/acsami.1c00304
UR - http://hdl.handle.net/10044/1/87176
VL - 13
ER -
Dr. Andreas Kafizas
Leader - Solar Coatings Group
e-mail: a.kafizas@imperial.ac.uk
tel: +44(0)20 7594 6752
twitter: @CoatingsSolar