Visible-light-driven TiO2/Ag3PO4 heterostructures with enhanced antifungal activity against agricultural pathogenic fungi Fusarium graminearum and mechanism insight

Bingkun Liu; Yongfei Xue; Jingtao Zhang; Bing Han; Jie Zhang; Xinying Suo; Lilong Mu; Hengzhen Shi

doi:10.1039/C6EN00415F

Visible-light-driven TiO₂/Ag₃PO₄ heterostructures with enhanced antifungal activity against agricultural pathogenic fungi Fusarium graminearum and mechanism insight

Bingkun Liu,*^a Yongfei Xue,^a Jingtao Zhang,^b Bing Han,^a Jie Zhang,^a Xinying Suo,^b Lilong Mu^a and Hengzhen Shi*^a

Author affiliations

* Corresponding authors

^a School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People's Republic of China
E-mail: liubk2015@zzuli.edu.cn, shihz@zzuli.edu.cn

^b School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People's Republic of China

Abstract

A series of TiO₂/Ag₃PO₄ heterostructures were fabricated via a facile in situ precipitation process. The as-synthesized composites were found to exhibit markedly enhanced photocatalytic inactivation of E. coli under visible light irradiation compared with bare TiO₂ and Ag₃PO₄ owing to the improved light absorption and the efficient separation of photo-induced electron–hole pairs. Moreover, the antifungal activity of the composite materials was studied against the phytopathogen Fusarium graminearum (one of the main pathogens of wheat). With 100 min of visible light illumination, the TiO₂/Ag₃PO₄ composite reduced the survival ratio of the F. graminearum macroconidia to about 2%. The photocatalytic disinfection mechanism of the macroconidia was attributed to the damage to their cell wall/membrane caused by the attack of reactive oxygen species as demonstrated by fluorescence staining. In addition, ESR measurement revealed that hydroxyl radicals were the predominant active species in the photocatalytic disinfection system. Our results suggest that this hybrid photocatalyst has great potential as an environmentally-friendly alternative method to disinfect plant pathogens for agricultural areas.

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Publication details

The article was received on 20 Sep 2016, accepted on 18 Nov 2016 and first published on 21 Nov 2016

Article type: Paper

DOI: 10.1039/C6EN00415F

Citation: Environ. Sci.: Nano, 2017,4, 255-264

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Visible-light-driven TiO₂/Ag₃PO₄ heterostructures with enhanced antifungal activity against agricultural pathogenic fungi Fusarium graminearum and mechanism insight

B. Liu, Y. Xue, J. Zhang, B. Han, J. Zhang, X. Suo, L. Mu and H. Shi, Environ. Sci.: Nano, 2017, 4, 255
DOI: 10.1039/C6EN00415F
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Environmental Science: Nano

Visible-light-driven TiO₂/Ag₃PO₄ heterostructures with enhanced antifungal activity against agricultural pathogenic fungi Fusarium graminearum and mechanism insight

Abstract

Supplementary files

Publication details

Visible-light-driven TiO₂/Ag₃PO₄ heterostructures with enhanced antifungal activity against agricultural pathogenic fungi Fusarium graminearum and mechanism insight

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