scholarly journals Boosting visible light harvesting and charge separation in surface modified TiO2 photonic crystal catalysts with CoOx nanoclusters

2020 ◽  
Vol 1 (7) ◽  
pp. 2310-2322 ◽  
Author(s):  
Alexia Toumazatou ◽  
Maria Antoniadou ◽  
Elias Sakellis ◽  
Dimitra Tsoutsou ◽  
Spyros Gardelis ◽  
...  
Keyword(s):  
Surface Modification ◽  
Photonic Crystal ◽  
Photonic Crystals ◽  
Visible Light ◽  
Charge Separation ◽  
Light Harvesting ◽  
Catalytic Applications ◽  
Surface Modified

Surface modification of co-assembled TiO2 photonic crystals by nanoscale Co-oxides boosts visible light harvesting and charge separation for catalytic applications.

scholarly journals Carbonized polymer dots/TiO2 photonic crystal heterostructures with enhanced light harvesting and charge separation for efficient and stable photocatalysis

2019 ◽  
Vol 3 (12) ◽  
pp. 2659-2667 ◽  
Author(s):  
Yue Zhao ◽  
Qingsen Zeng ◽  
Tanglue Feng ◽  
Chunlei Xia ◽  
Chongming Liu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
Light Harvesting ◽  
Polymer Dots ◽  
Photonic Crystal Heterostructures

Carbonized polymer dots (CPDs) are introduced into TiO2 photonic crystals (PCs) to form CPD/PC heterostructures, which show enhanced light harvesting and charge separation and thus promoted photocatalytic performance.

scholarly journals Visible Light Trapping against Charge Recombination in FeOx–TiO2 Photonic Crystal Photocatalysts

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7117
Author(s):  
Martha Pylarinou ◽  
Alexia Toumazatou ◽  
Elias Sakellis ◽  
Evangelia Xenogiannopoulou ◽  
Spiros Gardelis ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Visible Light ◽  
Charge Separation ◽  
Periodic Structures ◽  
Light Trapping ◽  
Surface Recombination ◽  
Photocurrent Density ◽  
Inverse Opals ◽  
Assembly Method ◽  
Surface Modified

Tailoring metal oxide photocatalysts in the form of heterostructured photonic crystals has spurred particular interest as an advanced route to simultaneously improve harnessing of solar light and charge separation relying on the combined effect of light trapping by macroporous periodic structures and compositional materials’ modifications. In this work, surface deposition of FeOx nanoclusters on TiO2 photonic crystals is investigated to explore the interplay of slow-photon amplification, visible light absorption, and charge separation in FeOx–TiO2 photocatalytic films. Photonic bandgap engineered TiO2 inverse opals deposited by the convective evaporation-induced co-assembly method were surface modified by successive chemisorption-calcination cycles using Fe(III) acetylacetonate, which allowed the controlled variation of FeOx loading on the photonic films. Low amounts of FeOx nanoclusters on the TiO2 inverse opals resulted in diameter-selective improvements of photocatalytic performance on salicylic acid degradation and photocurrent density under visible light, surpassing similarly modified P25 films. The observed enhancement was related to the combination of optimal light trapping and charge separation induced by the FeOx–TiO2 interfacial coupling. However, an increase of the FeOx loading resulted in severe performance deterioration, particularly prominent under UV-Vis light, attributed to persistent surface recombination via diverse defect d-states.

scholarly journals Synergetic Enhancement of Light Harvesting and Charge Separation over Surface-Disorder-Engineered TiO 2 Photonic Crystals

Chem ◽  
2017 ◽  
Vol 2 (6) ◽  
pp. 877-892 ◽  
Author(s):  
Jinmeng Cai ◽  
Moqing Wu ◽  
Yating Wang ◽  
Hao Zhang ◽  
Ming Meng ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Charge Separation ◽  
Light Harvesting ◽  
Surface Disorder

scholarly journals Facile Preparation of Efficient WO3Photocatalysts Based on Surface Modification

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Min Liu ◽  
Hongmei Li ◽  
Yangsu Zeng
Keyword(s):  
Photocatalytic Activity ◽  
Surface Modification ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Impregnation Method ◽  
Light Spectra ◽  
Simple Strategy ◽  
Visible Light Active ◽  
Efficient Charge ◽  
Surface Modified

Tungsten trioxide (WO3) was surface modified with Cu(II) nanoclusters and titanium dioxide (TiO2) nanopowders by using a simple impregnation method followed by a physical combining method. The obtained nanocomposites were studied by scanning electron microscope, X-ray photoelectron spectroscopy spectra, UV-visible light spectra, and photoluminescence, respectively. Although the photocatalytic activity of WO3was negligible under visible light irradiation, the visible light photocatalytic activity of WO3was drastically enhanced by surface modification of Cu(II) nanoclusters and TiO2nanopowders. The enhanced photocatalytic activity is due to the efficient charge separation by TiO2and Cu(II) nanoclusters functioning as cocatalysts on the surface. Thus, this simple strategy provides a facile route to prepare efficient visible-light-active photocatalysts for practical application.

Efficient light harvesting over a CdS/In2O3 photonic crystal photocatalyst for hydrogenation of 4-nitroaniline to p-phenylenediamine

2016 ◽  
Vol 18 (40) ◽  
pp. 27848-27857 ◽  
Author(s):  
Xiaofang Li ◽  
Changqian Wang ◽  
Bo Li ◽  
Yu Shao ◽  
Danzhen Li
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Light Harvesting

Efficient light harvesting was observed over CdS photodeposited on In2O3 photonic crystals during the photocatalytic hydrogenation of 4-nitroaniline to p-phenylenediamine.

Visible Light Harvesting and Spatial Charge Separation over the Creative Ni/CdS/Co3O4 Photocatalyst

2018 ◽  
Vol 122 (19) ◽  
pp. 10430-10441 ◽  
Author(s):  
Hao Yang ◽  
Zhiliang Jin ◽  
Duanduan Liu ◽  
Kai Fan ◽  
Guorong Wang
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Light Harvesting ◽  
Spatial Charge

Designed synthesis of unique ZnS@[email protected] hollow nanospheres for efficient visible-light-driven H2 evolution

CrystEngComm ◽  
2020 ◽  
Vol 22 (16) ◽  
pp. 2743-2755 ◽  
Author(s):  
Bowen Sun ◽  
Hui Wang ◽  
Jiakun Wu ◽  
Yanling Geng ◽  
Jixiang Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Charge Separation ◽  
Active Sites ◽  
Light Harvesting ◽  
H2 Evolution ◽  
Hollow Nanospheres ◽  
Visible Light Driven ◽  
Designed Synthesis

Unique ZnS@[email protected] hollow nanospheres with abundant active sites and enhanced light-harvesting and charge separation demonstrate efficient H2 evolution from visible-light-driven water-splitting.

High-efficiency water oxidation and energy storage utilizing various reversible redox mediators under visible light over surface-modified WO3

RSC Advances ◽  
2014 ◽  
Vol 4 (16) ◽  
pp. 8308-8316 ◽  
Author(s):  
Yugo Miseki ◽  
Kazuhiro Sayama
Keyword(s):  
Surface Modification ◽  
Energy Storage ◽  
Solar Energy ◽  
Visible Light ◽  
Water Oxidation ◽  
High Efficiency ◽  
Redox Mediators ◽  
Solar Energy Storage ◽  
Reversible Redox ◽  
Surface Modified

Water oxidation and solar energy storage utilizing a reversible redox mediator were enhanced by the surface modification of the WO3 photocatalyst.

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