Photocatalytic and Antimicrobial Properties of Ag2O/TiO2 Heterojunction

被引：38

作者：

Endo-Kimura, Maya ^{[1
]}

Janczarek, Marcin ^{[1
,2
]}

Bielan, Zuzanna ^{[1
,3
]}

Zhang, Dong ^{[1
]}

Wang, Kunlei ^{[1
]}

Markowska-Szczupak, Agata ^{[1
,4
]}

Kowalska, Ewa ^{[1
]}

机构：

[1] Hokkaido Univ, Inst Catalysis, Sapporo, Hokkaido 0010021, Japan

[2] Poznan Univ Tech, Inst Chem Technol & Engn, Fac Chem Technol, PL-60965 Poznan, Poland

[3] Gdansk Univ Technol, Dept Proc Engn & Chem Technol, PL-80233 Gdansk, Poland

[4] West Pomeranian Univ Technol, Inst Chem & Environm Engn, Pulaskiego 10, PL-70322 Szczecin, Poland

来源：

CHEMENGINEERING | 2019年 / 3卷 / 01期

关键词：

heterogeneous photocatalysis; nanocomposites; heterojunction; Ag2O; TiO2; antimicrobial properties; VISIBLE-LIGHT PHOTOCATALYST; P-N HETEROJUNCTION; TITANIUM-DIOXIDE; AG2O NANOPARTICLES; METHYLENE-BLUE; SILVER-OXIDE; IN-VITRO; TIO2; SURFACE; ANATASE;

D O I：

10.3390/chemengineering3010003

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Ag2O/TiO2 heterojunctions were prepared by a simple method, i.e., the grinding of argentous oxide with six different titania photocatalysts. The physicochemical properties of the obtained photocatalysts were characterized by diffuse-reflectance spectroscopy (DRS), X-ray powder diffraction (XRD) and scanning transmission electron microscopy (STEM) with an energy dispersive X-ray spectroscopy (EDS). The photocatalytic activity was investigated for the oxidative decomposition of acetic acid and methanol dehydrogenation under UV/vis irradiation and for the oxidative decomposition of phenol and 2-propanol under vis irradiation. Antimicrobial properties were tested for bacteria (Escherichia coli) and fungi (Candida albicans and Penicillium chrysogenum) under UV and vis irradiation and in the dark. Enhanced activity was observed under UV/vis (with synergism for fine anatase-containing samples) and vis irradiation for almost all samples. This suggests a hindered recombination of charge carriers by p-n heterojunction or Z-scheme mechanisms under UV irradiation and photo-excited electron transfer from Ag2O to TiO2 under vis irradiation. Improved antimicrobial properties were achieved, especially under vis irradiation, probably due to electrostatic attractions between the negative surface of microorganisms and the positively charged Ag2O.

引用

页码：1 / 18

页数：18

共 74 条

[1] Overall Water Splitting under Visible Light through a Two-Step Photoexcitation between TaON and WO3 in the Presence of an Iodate-Iodide Shuttle Redox Mediator [J].

Abe, Ryu ;

Higashi, Masanobu ;

Domen, Kazunari .

CHEMSUSCHEM, 2011, 4 (02) :228-237

[2]

Allahverdiyev AM, 2011, FUTURE MICROBIOL, V6, P933, DOI [10.2217/FMB.11.78, 10.2217/fmb.11.78]

[3] Electronic structures of silver oxides [J].

Allen, Jeremy P. ;

Scanlon, David O. ;

Watson, Graeme W. .

PHYSICAL REVIEW B, 2011, 84 (11)

[4] Chitosan-PVP-nano silver oxide wound dressing: In vitro and in vivo evaluation [J].

Archana, D. ;

Singh, Brijesh K. ;

Dutta, Joydeep ;

Dutta, P. K. .

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 2015, 73 :49-57

[5] On Oxygen Activation at Rutile- and Anatase-TiO2 [J].

Buchalska, Marta ;

Kobielusz, Marcin ;

Matuszek, Anna ;

Pacia, Michal ;

Wojtyla, Szymon ;

Macyk, Wojciech .

ACS CATALYSIS, 2015, 5 (12) :7424-7431

[6] A Review of Heterogeneous Photocatalysis for Water and Surface Disinfection [J].

Byrne, John Anthony ;

Dunlop, Patrick Stuart Morris ;

Hamilton, Jeremy William John ;

Fernandez-Ibanez, Pilar ;

Polo-Lopez, Inmaculada ;

Sharma, Preetam Kumar ;

Vennard, Ashlene Sarah Margaret .

MOLECULES, 2015, 20 (04) :5574-5615

[7] PHOTOBIOLOGY OF FUNGI [J].

CARLILE, MJ .

ANNUAL REVIEW OF PLANT PHYSIOLOGY, 1965, 16 :175-+

[8] Enhanced adsorption and photocatalytic degradation of high-concentration methylene blue on Ag2O-modified TiO2-based nanosheet [J].

Chen, Feitai ;

Liu, Zhi ;

Liu, Yang ;

Fang, Pengfei ;

Dai, Yiqun .

CHEMICAL ENGINEERING JOURNAL, 2013, 221 :283-291

[9] Synthesis of Diverse Ag2O Crystals and Their Facet-Dependent Photocatalytic Activity Examination [J].

Chen, Ying-Jui ;

Chiang, Yun-Wei ;

Huang, Michael H. .

ACS APPLIED MATERIALS & INTERFACES, 2016, 8 (30) :19672-19679

[10] Fabrication of Ag-Ag2O/reduced TiO2 nanophotocatalyst and its enhanced visible light driven photocatalytic performance for degradation of diclofenac solution [J].

Cui, Yuqi ;

Ma, Qiuling ;

Deng, Xiaoyong ;

Meng, Qi ;

Cheng, Xiuwen ;

Xie, Mingzheng ;

Li, Xiaoli ;

Cheng, Qingfeng ;

Liu, Huiling .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2017, 206 :136-145

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