Ag size-dependent visible-light-responsive photoactivity of Ag–TiO2 nanostructure based on surface plasmon resonance

2014 ◽  
Vol 2 (46) ◽  
pp. 19861-19866 ◽  
Author(s):  
Zhuo Jiang ◽  
Qin Ouyang ◽  
Bosi Peng ◽  
Youxiang Zhang ◽  
Ling Zan
Keyword(s):  
Surface Plasmon Resonance ◽  
Visible Light ◽  
Surface Plasmon ◽  
Growth Mechanism ◽  
Plasmon Resonance ◽  
Ag Nps ◽  
Size Dependent ◽  
Tio2 Nanostructure

The proposed growth mechanism of Ag NPs during PAg–TiO2 (A) and SAg–TiO2 (B) preparation processes.

Plasmon-Induced Photodegradation of Toxic Pollutants with Ag/AgI/Bi2WO6 under Visible-Light Irradiation

2013 ◽  
Vol 807-809 ◽  
pp. 1534-1542 ◽  
Author(s):  
Ming Sheng Gui ◽  
Peng Fei Wang ◽  
Miao Miao Tang ◽  
Dong Yuan
Keyword(s):  
Surface Plasmon Resonance ◽  
Visible Light ◽  
Surface Plasmon ◽  
Visible Light Irradiation ◽  
Plasmon Resonance ◽  
Photogenerated Electron ◽  
Light Irradiation ◽  
Ag Nps ◽  
Electron Hole ◽  
Band Position

The Ag/AgI/Bi2WO6photocatalysts were successfully synthesized by deposition-precipitation and photoreduction methods. The catalyst showed high and stable photocatalytic activity for the degradation of the RhB under visible light irradiation (λ>400 nm). On the basis of a new plasmonic photocatalytic mechanism, the photogenerated electron-hole pairs are formed in Ag nanoparticles (NPs) due to surface plasmon resonance under visible-light irradiation. Then, the photoexcited electrons at the Ag NPs are injected into AgI. On the other hand, the band position shows that AgI and Bi2WO6have the matching band potentials in the AgI/Bi2WO6heterostructure composites. So the photoexcited electrons is ultimately transfer to the Bi2WO6conduction band (CB), photo-induced holes (hVB+) is transfer to the AgI valence band (VB) and the simultaneous transfer to compensative electrons from I-to the Ag NPS. This the result indicates that the high photosensitivity of noble metal Ag NPs due to surface plasmon resonance, which is not only improve the photocatalytic performance, but also offer a new idea for preparation of new photocatalysts .

scholarly journals The production of an efficient visible light photocatalyst for CO oxidation through the surface plasmonic effect of Ag nanoparticles on SiO2@α-Fe2O3 nanocomposites

RSC Advances ◽  
2018 ◽  
Vol 8 (23) ◽  
pp. 12547-12555 ◽  
Author(s):  
Kasimayan Uma ◽  
Shih-Wen Chen ◽  
Nadarajan Arjun ◽  
Guan-Ting Pan ◽  
Thomas C.-K. Yang
Keyword(s):  
Surface Plasmon Resonance ◽  
Visible Light ◽  
Co Oxidation ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Ag Nanoparticles ◽  
Systematic Investigation ◽  
Plasmonic Effect ◽  
Visible Light Photocatalyst

We present a systematic investigation of CO oxidation and surface plasmon resonance on SiO2@α-Fe2O3 nanocomposite spheres with different weight percentages of Ag nanoparticles.

Influence of dimensionality and crystallization on visible-light hydrogen production of Au@TiO2 core–shell photocatalysts based on localized surface plasmon resonance

2018 ◽  
Vol 8 (4) ◽  
pp. 1094-1103 ◽  
Author(s):  
Bing Liu ◽  
Yan Jiang ◽  
Yin Wang ◽  
Shuxia Shang ◽  
Yuanman Ni ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Surface Plasmon Resonance ◽  
Hydrogen Production ◽  
Visible Light ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Core Shell

We synthesized four Au@TiO2 nanostructures, which exhibit dimensionality- and crystallinity-dependent photocatalytic activity towards H2 generation.

scholarly journals Palladium nanoparticles anchored to anatase TiO2 for enhanced surface plasmon resonance-stimulated, visible-light-driven photocatalytic activity

2015 ◽  
Vol 6 ◽  
pp. 428-437 ◽  
Author(s):  
Kah Hon Leong ◽  
Hong Ye Chu ◽  
Shaliza Ibrahim ◽  
Pichiah Saravanan
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Surface Plasmon Resonance ◽  
Visible Light ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Palladium Nanoparticles ◽  
Noble Metals ◽  
Visible Region ◽  
Bet Surface Area

Freely assembled palladium nanoparticles (Pd NPs) on titania (TiO2) nano photocatalysts were successfully synthesized through a photodeposition method using natural sunlight. This synthesized heterogeneous photocatalyst (Pd/TiO2) was characterized through field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), BET surface area, UV–vis diffuse reflectance spectra (UV-DRS), Raman and photoluminescence (PL) analyses. The simple and smart synthesis anchored well the deposition with controlled Pd NPs size ranging between 17 and 29 nm onto the surface of TiO2. Thus, it gives the characteristic for Pd NPs to absorb light in the visible region obtained through localized surface plasmon resonance (LSPRs). Apparently, the photocatalytic activity of the prepared photocatalysts was evaluated by degrading the endocrine disrupting compound (EDC) amoxicillin (AMX) excited under an artificial visible light source. In the preliminary run, almost complete degradation (97.5%) was achieved in 5 h with 0.5 wt % Pd loading and the degradation followed pseudo-first-order kinetics. The reusability trend proved the photostability of the prepared photocatalysts. Hence, the study provides a new insight about the modification of TiO2 with noble metals in order to enhance the absorption in the visible-light region for superior photocatalytic performance.

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