Fabrication of plasma-reduced silver coupled with titanium dioxide nanoparticles for visible light-driven photocatalysis

Author:

Montallana Arantxa Danielle S.1ORCID,Angeles Joven Paolo D.2ORCID,Chu Jinn P.3ORCID,Sherburne Matthew P.4ORCID,Vasquez Magdaleno R.5ORCID,Wada Motoi1ORCID

Affiliation:

1. Graduate School of Science and Engineering, Doshisha University 1 , Kyotanabe, Kyoto 610-0321, Japan

2. Materials Science and Engineering Program, College of Science, University of the Philippines 2 , Diliman, Quezon City 1101, Philippines

3. Department of Materials Science and Engineering, National Taiwan University of Science and Technology 3 , Taipei 10607, Taiwan

4. Department of Materials Science and Engineering, University of California 4 , Berkeley, California 94720

5. Department of Mining, Metallurgical, and Materials Engineering, College of Engineering, University of the Philippines 5 , Diliman, Quezon City 1101, Philippines

Abstract

The photocatalytic activity of titanium dioxide (TiO2) was improved by forming a matrix containing silver (Ag) nanoparticles (NPs) prepared by a plasma process. The plasma-assisted reduction process successfully formed metallic Ag on the surface of the TiO2 NP matrix to create the Ag-TiO2 Janus heterostructure. The synthesized NPs were characterized using Brunauer, Emmett, and Teller surface analysis, transmission electron microscopy, x-ray diffraction spectroscopy, x-ray photoelectron spectroscopy, Raman spectroscopy, and UV-vis spectroscopy. Photocatalytic dye decomposition experiments revealed up to 96% methylene blue removal after 4 h of visible light irradiation, a fivefold increase in removal efficiency compared to using TiO2 NPs only.

Funder

Department of Science and Technology, Philippines

University of the Philippines

Ministry of Science and Technology, Taiwan

Publisher

American Vacuum Society

Subject

Materials Chemistry,Electrical and Electronic Engineering,Surfaces, Coatings and Films,Process Chemistry and Technology,Instrumentation,Electronic, Optical and Magnetic Materials

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