Antifungal properties of high efficient W/WO3 electrodes acting under UV-Vis and visible light and chloride medium

Barbara C.A. Souza; Thais Tasso Guaraldo; Michelle F. Brugnera; Regina H. Pires; Maria J.S.M. Giannini; Maria V.B. Zanoni

doi:10.21577/0103-5053.20170053

Antifungal properties of high efficient W/WO3 electrodes acting under UV-Vis and visible light and chloride medium

Barbara C.A. Souza, Thais Tasso Guaraldo, Michelle F. Brugnera, Regina H. Pires, Maria J.S.M. Giannini, Maria V.B. Zanoni

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The present work investigates the use of W/WO₃ electrodes prepared by electrochemical anodization applied in the photoelectrocatalytic disinfection of Candida parapsilosis using ultraviolet-visible (UV-Vis) and visible irradiation. The core objective of this work lies in describing a novel approach involving the use of chloride as supporting electrolyte, aiming at achieving a faster inactivation and towards understanding its behavior in water containing high chloride content. The best experimental conditions were found to be at pH 7.0 and 0.1 mol L^-1 NaCl when the photoelectrode was biased at 1.5 V (vs. Ag/AgCl) illuminated by both UV-Vis and visible light. It is suggested that charges photogenerated on the electrode surface give rise preferably to HO•, known to be powerful oxidant that causes the total inactivation of the microorganism (1 min of treatment) while engendering around 84% of mineralization of organic matter released from the cell damage following 120 min of treatment.

Original language	English
Pages (from-to)	2084-2093
Number of pages	10
Journal	Journal of the Brazilian Chemical Society
Volume	28
Issue number	11
DOIs	https://doi.org/10.21577/0103-5053.20170053
Publication status	Published - 30 Nov 2017
Externally published	Yes

Bibliographical note

This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Funder

The authors would like to express their deepest gratitude
and indebtedness to the Brazilian Research Assistance
Agencies FAPESP and CAPES for the financial support
granted during the course of this research.

Keywords

photoelectrocatalysis
W/WO3 semicondutor
C. Parapsilosis disinfection
photoelectrocatalysis in chloride medium

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10.21577/0103-5053.20170053Licence: CC BY

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title = "Antifungal properties of high efficient W/WO3 electrodes acting under UV-Vis and visible light and chloride medium",

abstract = "The present work investigates the use of W/WO3 electrodes prepared by electrochemical anodization applied in the photoelectrocatalytic disinfection of Candida parapsilosis using ultraviolet-visible (UV-Vis) and visible irradiation. The core objective of this work lies in describing a novel approach involving the use of chloride as supporting electrolyte, aiming at achieving a faster inactivation and towards understanding its behavior in water containing high chloride content. The best experimental conditions were found to be at pH 7.0 and 0.1 mol L-1 NaCl when the photoelectrode was biased at 1.5 V (vs. Ag/AgCl) illuminated by both UV-Vis and visible light. It is suggested that charges photogenerated on the electrode surface give rise preferably to HO•, known to be powerful oxidant that causes the total inactivation of the microorganism (1 min of treatment) while engendering around 84% of mineralization of organic matter released from the cell damage following 120 min of treatment.",

keywords = "photoelectrocatalysis, W/WO3 semicondutor, C. Parapsilosis disinfection, photoelectrocatalysis in chloride medium",

author = "Souza, {Barbara C.A.} and Guaraldo, {Thais Tasso} and Brugnera, {Michelle F.} and Pires, {Regina H.} and Giannini, {Maria J.S.M.} and Zanoni, {Maria V.B.}",

note = "This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.",

year = "2017",

month = nov,

day = "30",

doi = "10.21577/0103-5053.20170053",

language = "English",

volume = "28",

pages = "2084--2093",

journal = "Journal of the Brazilian Chemical Society",

issn = "1678-4790",

publisher = "Sociedade Brasileira de Quimica",

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TY - JOUR

T1 - Antifungal properties of high efficient W/WO3 electrodes acting under UV-Vis and visible light and chloride medium

AU - Souza, Barbara C.A.

AU - Guaraldo, Thais Tasso

AU - Brugnera, Michelle F.

AU - Pires, Regina H.

AU - Giannini, Maria J.S.M.

AU - Zanoni, Maria V.B.

N1 - This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

PY - 2017/11/30

Y1 - 2017/11/30

N2 - The present work investigates the use of W/WO3 electrodes prepared by electrochemical anodization applied in the photoelectrocatalytic disinfection of Candida parapsilosis using ultraviolet-visible (UV-Vis) and visible irradiation. The core objective of this work lies in describing a novel approach involving the use of chloride as supporting electrolyte, aiming at achieving a faster inactivation and towards understanding its behavior in water containing high chloride content. The best experimental conditions were found to be at pH 7.0 and 0.1 mol L-1 NaCl when the photoelectrode was biased at 1.5 V (vs. Ag/AgCl) illuminated by both UV-Vis and visible light. It is suggested that charges photogenerated on the electrode surface give rise preferably to HO•, known to be powerful oxidant that causes the total inactivation of the microorganism (1 min of treatment) while engendering around 84% of mineralization of organic matter released from the cell damage following 120 min of treatment.

AB - The present work investigates the use of W/WO3 electrodes prepared by electrochemical anodization applied in the photoelectrocatalytic disinfection of Candida parapsilosis using ultraviolet-visible (UV-Vis) and visible irradiation. The core objective of this work lies in describing a novel approach involving the use of chloride as supporting electrolyte, aiming at achieving a faster inactivation and towards understanding its behavior in water containing high chloride content. The best experimental conditions were found to be at pH 7.0 and 0.1 mol L-1 NaCl when the photoelectrode was biased at 1.5 V (vs. Ag/AgCl) illuminated by both UV-Vis and visible light. It is suggested that charges photogenerated on the electrode surface give rise preferably to HO•, known to be powerful oxidant that causes the total inactivation of the microorganism (1 min of treatment) while engendering around 84% of mineralization of organic matter released from the cell damage following 120 min of treatment.

KW - photoelectrocatalysis

KW - W/WO3 semicondutor

KW - C. Parapsilosis disinfection

KW - photoelectrocatalysis in chloride medium

UR - http://jbcs.sbq.org.br/imagebank/pdf/2016-0743AR.pdf

U2 - 10.21577/0103-5053.20170053

DO - 10.21577/0103-5053.20170053

M3 - Article

SN - 1678-4790

VL - 28

SP - 2084

EP - 2093

JO - Journal of the Brazilian Chemical Society

JF - Journal of the Brazilian Chemical Society

IS - 11

ER -

Antifungal properties of high efficient W/WO3 electrodes acting under UV-Vis and visible light and chloride medium

Abstract

Bibliographical note

Funder

Keywords

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