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Compositional gradients in sputtered Ti-Au alloys: Site-selective Au-decoration of anodic TiO nanotubes towards enhanced photocatalytic H evolution
Seyedsina Hejazi, Marco Altomare, Shiva Mohajernia +1
Au nanoparticles at the TiO surface can enhance the photocatalytic H generation performances owing to their electron transfer co-catalytic ability. Key to maximize the co-c…
Double-Side Cocatalytic Activation of Anodic TiO Nanotube Membranes with Sputter-Coated Pt for Photocatalytic H Generation from Water-Ethanol Mixtures
Gihoon Cha, Marco Altomare, Nhat Truong Nguyen +3
Self-standing TiO nanotube layers in the form of membranes are fabricated by self-organizing anodization of Ti metal and a potential shock technique. The membranes were then de…
Dewetted Au nanoparticles on TiO surfaces -- Evidence of a size-independent plasmonic photo-electrochemical response
Markus Licklederer, Nhat Truong Nguyen, Reza Mohammadi +6
Flat TiO layers are deposited by magnetron sputtering on Ti/Si wafers. The TiO surfaces are then sputter-coated with thin Au films of a nominal thickness of 0.5-10 nm that…
Large diameter TiO nanotubes enable integration of conformed hierarchical and blocking layers for enhanced dye-sensitized solar cell efficiency
Abdelhamid Elzarka, Ning Liu, Imgon Hwang +2
In the present work we grow anodic TiO nanotube layer with tube diameter ~ 500 nm and an open tube mouth. We use this morphology in dye-sensitized solar cells (DSSCs) and show…
Enhanced Solar Water Splitting by Swift Charge Separation in Au/FeOOH Sandwiched Single Crystalline FeO Nanoflake Photoelectrodes
Lei Wang, Nhat Truong Nguyen, Yajun Zhang +2
In this work, single crystalline -FeO nanoflakes (NFs) are formed in a highly dense array by Au seeding of a Fe substrate by a thermal oxidation technique. The NFs are c…
Highly Conducting Spaced TiO Nanotubes Enable Defined Conformal Coating with Nanocrystalline NbO and High Performance Supercapacitor Applications
Selda Ozkan, Nhat Truong Nguyen, Imgon Hwang +2
In this work, we report on the electrochemical behavior of nitrided spaced TiO nanotubes conformally coated with a nanocrystalline NbO layer and find for these hierarch…
Nanoporous AuPt and AuPtAg alloy co-catalysts formed by dewetting-dealloying on ordered TiO2 nanotube surface lead to significantly enhanced photocatalytic H2 generation
Nhat Truong Nguyen, Selda Ozkan, Ondrej Tomanec +3
Effective co-catalysts are of key importance for photocatalytic H2 generation from aqueous environments. An attractive co-catalyst candidate are AuPt (metastable) alloys due to the…
Magneli phases doped with Pt for photocatalytic hydrogen evolution
Ewa Wierzbicka, Maximilian Domaschke, Nikita Denisov +8
Defined substoichiometric titanium oxides (TiO with ) called Magneli phases have been investigated mostly for their unusual high conductivity and metal-lik…
Amorphous Mo-Ta oxide nanotubes for long-term stable Mo oxide based supercapacitors
Bowen Jin, Seyedsina Hejazi, Florian Pyczak +8
With a large-scale usage of portable electric appliances, a high demand for increasingly high density energy storage devices has emerged. MoO3 has, in principle, a large potential…
TiO nanotubes with different spacing, FeO decoration and their evaluation for Li-ion battery application
Selda Ozkan, Gihoon Cha, Anca Mazare +1
In present work, we report on the use of organized TiO nanotube layers with a regular intertube spacing for the growth of highly defined -FeO nano-needles in the int…
Noble metal free photocatalytic H generation on black TiO: On the influence of crystal facets vs. crystal damage
Ning Liu, Hans-Georg Steinrueck, Andres Osvet +2
In this study, we investigate noble metal free photocatalytic water splitting on natural anatase single crystal facets and on wafer slices of the [001] plane before and after these…
Photoanodes Based on TiO and -FeO for Solar Water Splitting Superior Role of 1D Nanoarchitectures and of Combined Heterostructures
Stepan Kment, Francesca Riboni, Sarka Pausova +7
Solar driven photoelectrochemical water splitting (PEC-WS) using semiconductor photoelectrodes represents a promising approach for a sustainable and environmentally friendly produc…
Forming a highly active, homogeneously alloyed AuPt co-catalyst decoration on O2 nanotubes directly during anodic growth
Haidong Bian, Nhat Truong Nguyen, JeongEun Yoo +10
Au and Pt do not form homogeneous bulk alloys as they are thermodynamically not miscible. However, we show that anodic TiO nanotubes (NTs) can in-situ be uniformly decorated wi…
Photocatalysis with TiO2 Nanotubes: Colorful Reactivity and Designing Site-Specific Photocatalytic Centers into TiO2 Nanotubes
Xuemei Zhou, Ning Liu, Patrik Schmuki
Photocatalytic reactions on TiO2 have recently gained an enormous resurgence because of various new strategies and findings that promise to drastically increase efficiency and spec…