Au–NiOx nanocomposite for hot electron-assisted plasmonic photocatalysis

2020 ◽  
Vol 8 (29) ◽  
pp. 9885-9897 ◽  
Author(s):  
Diana Fragua ◽  
Jaume Noguera-Gomez ◽  
Pedro J. Rodríguez-Canto ◽  
L. M. Valencia ◽  
M. de la Mata ◽  
...  
Keyword(s):  
Thin Films ◽  
Au Nanoparticles ◽  
Hot Electrons ◽  
Photocatalytic Properties ◽  
Hot Electron ◽  
Highly Efficient

Nanocomposites of NiOx thin films containing Au nanoparticles shows sunlight-driven highly efficient photocatalytic properties by plasmon-induced hot electrons.

Size Effect of Au Nanoparticles on TiO2 Crystalline Phase of Nanocomposite Thin Films and Their Photocatalytic Properties

2011 ◽  
Vol 115 (14) ◽  
pp. 6554-6560 ◽  
Author(s):  
Chihiro Yogi ◽  
Kazuo Kojima ◽  
Takeshi Hashishin ◽  
Noriyuki Wada ◽  
Yasuhiro Inada ◽  
...  
Keyword(s):  
Thin Films ◽  
Size Effect ◽  
Crystalline Phase ◽  
Au Nanoparticles ◽  
Photocatalytic Properties ◽  
Nanocomposite Thin Films

Defect state-induced efficient hot electron transfer in Au nanoparticles/reduced TiO2 mesocrystal photocatalysts

2018 ◽  
Vol 54 (47) ◽  
pp. 6052-6055 ◽  
Author(s):  
Jiawei Xue ◽  
Ossama Elbanna ◽  
Sooyeon Kim ◽  
Mamoru Fujitsuka ◽  
Tetsuro Majima
Keyword(s):  
Electron Transfer ◽  
Schottky Barrier ◽  
Au Nanoparticles ◽  
Hot Electrons ◽  
Defect State ◽  
Hot Electron ◽  
Defect States ◽  
Hot Electron Transfer

Defect states assist hot electrons with energies lower than the Schottky barrier in transferring from Au nanoparticles to TiO2.

Mesoporous TiO2 thin films embedded with Au nanoparticles for the enhancement of the photocatalytic properties

2009 ◽  
Vol 517 (17) ◽  
pp. 4998-5000 ◽  
Author(s):  
Zih-Yu Chen ◽  
Yi Hu ◽  
Tung-Cheng Liu ◽  
Chien-Lung Huang ◽  
Tian-Syuan Jeng
Keyword(s):  
Thin Films ◽  
Au Nanoparticles ◽  
Mesoporous Tio2 ◽  
Photocatalytic Properties ◽  
Tio2 Thin Films

Tuning the pore structures and photocatalytic properties of a 2D covalent organic framework with multi-branched photoactive moieties

Nanoscale ◽  
2020 ◽  
Vol 12 (30) ◽  
pp. 16136-16142
Author(s):  
Xuan Wang ◽  
Ming-Jie Dong ◽  
Chuan-De Wu
Keyword(s):  
Photocatalytic Properties ◽  
Effective Strategy ◽  
Covalent Organic Framework ◽  
Highly Efficient ◽  
Pore Structures ◽  
Local Connection ◽  
Organic Framework

An effective strategy to incorporate accessible metalloporphyrin photoactive sites into 2D COFs by establishing a 3D local connection for highly efficient photocatalysis was developed.

scholarly journals Plasmonic hot-electron photodetection with quasi-bound states in the continuum and guided resonances

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Wenhao Wang ◽  
Lucas V. Besteiro ◽  
Peng Yu ◽  
Feng Lin ◽  
Alexander O. Govorov ◽  
...  
Keyword(s):  
Bound States ◽  
Structural Parameters ◽  
Hybrid Structure ◽  
Fine Tuning ◽  
Hot Electrons ◽  
Hot Electron ◽  
Perfect Absorption ◽  
High Loss ◽  
Guided Mode ◽  
The Continuum

Abstract Hot electrons generated in metallic nanostructures have shown promising perspectives for photodetection. This has prompted efforts to enhance the absorption of photons by metals. However, most strategies require fine-tuning of the geometric parameters to achieve perfect absorption, accompanied by the demanding fabrications. Here, we theoretically propose a Ag grating/TiO2 cladding hybrid structure for hot electron photodetection (HEPD) by combining quasi-bound states in the continuum (BIC) and plasmonic hot electrons. Enabled by quasi-BIC, perfect absorption can be readily achieved and it is robust against the change of several structural parameters due to the topological nature of BIC. Also, we show that the guided mode can be folded into the light cone by introducing a disturbance to become a guided resonance, which then gives rise to a narrow-band HEPD that is difficult to be achieved in the high loss gold plasmonics. Combining the quasi-BIC and the guided resonance, we also realize a multiband HEPD with near-perfect absorption. Our work suggests new routes to enhance the light-harvesting in plasmonic nanosystems.

scholarly journals Universal Fabrication of Highly Efficient Plasmonic Thin‐Films for Label‐Free SERS Detection

Small ◽  
2021 ◽  
pp. 2100755
Author(s):  
Sara Gullace ◽  
Verónica Montes‐García ◽  
Victor Martín ◽  
David Larios ◽  
Valentina Girelli Consolaro ◽  
...  
Keyword(s):  
Thin Films ◽  
Label Free ◽  
Highly Efficient ◽  
Sers Detection

Preparation of TiO2 (Au) Nanotubes by Hydrothermal Method for Photocatalytic Reduction of Cd2+ Ions

2014 ◽  
Vol 609-610 ◽  
pp. 375-381
Author(s):  
Chun Xiao Feng ◽  
Guang Qing Xu ◽  
Jun Lv ◽  
Zhi Xiang Zheng ◽  
Yu Cheng Wu
Keyword(s):  
Hydrothermal Method ◽  
Au Nanoparticles ◽  
Reduction Method ◽  
Photocatalytic Reduction ◽  
Photocatalytic Properties ◽  
Absorption Intensity ◽  
Reducing Ability ◽  
Highly Dispersed ◽  
Naoh Solution ◽  
Hydrothermal Reduction

Highly dispersed TiO2 nanotubes (TiO2-NTs) were synthesized via the reaction of anatase TiO2 powder with NaOH solution. Au nanoparticles of about 5 nm were deposited on the surface of TiO2-NTs with hydrothermal reduction method. The prepared nanocomposites were well characterized with TEM and XRD. Their photocatalytic properties and reducing ability were investigated by UV-Vis absorption and photocatalytic reduction of Cd2+ ions with different amount of TiO2-NTs and TiO2-NTs (Au) varying from 0.1g to 0.001g. The results from absorption patterns and AAS showed that the absorption intensity of TiO2-NTs (Au) was higher compared with that of TiO2-NTs. Moreover, the concentration of remanent Cd2+ (0.48mg/L) using TiO2-NTs (Au) was lower than that of Cd2+ (0.65mg/L) using TiO2-NTs.

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