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Fabrication of TiO2 nanotubes-assembled hierarchical microspheres with enhanced photocatalytic degradation activity

28-Apr-2015 | Liangpeng Wu; Yong Qiu; Min Xi; Xinjun Li; Chaoping Cen, New Journal of Chemistry, 2015

TiO2 nanotubes-assembled hierarchical microspheres were fabricated by a one step hydrothermal route using P25 in NaOH aqueous solution with the assistance of H2O2, followed by temperature-programmed calcinations treatment at 400 °C. The photocatalytic activity of the sample was investigated by ...


Transverse migration of polyelectrolytes in microfluidic channels induced by combined shear and electric fields

28-Apr-2015 | Mert Arca; Jason E. Butler; Anthony J. C. Ladd, Soft Matter, 2015

If a dilute solution of a polyelectrolyte such as DNA is forced through a microcapillary by an electric field, while simultaneously driven by a pressure gradient, then the polymer will migrate in directions transverse to the field lines. Here we investigate the sharp increase in concentration in ...


Pulsed laser ablation synthesis of magnesiowüstite based phases with special defect clusters, interfaces and internal stress: implications for natural occurrence and engineering applications

28-Apr-2015 | Tsung-Yi Lin; Shih-Siang Lin; Shuei-Yuan Chen; Pouyan Shen, CrystEngComm, 2015

Nanocondensates of rocksalt-type (R) magnesiowüstite and minor spinel-type (S) magnesioferrite with paracrystalline distribution of defect clusters were fabricated by pulsed laser ablation of MgO–Fe2O3 solid solution (9 [ ] : [ ] 1 molar ratio) under specified power densities in air and ...


Molecular material based on electropolymerized cobalt macrocycle for electrocatalytic hydrogen evolution

23-Apr-2015 | Stephane Rioual; Benoit Lescop; François Quentel; Frederic Gloaguen, Physical Chemistry Chemical Physics, 2015

Electrocatalytic material for the H2 evolution reaction (HER) in acidic aqueous solution has been prepared by electropolymerization of Co(II) dibenzotetraaza[14] annulene (CoTAA). Chemical analysis by X-ray photoelectron spectroscopy (XPS) confirms that the structural integrity of the [CoII-N4] ...


Self-assembling corroles

23-Apr-2015 | Rafał Orłowski; Olena Vakuliuk; Maria Pia Gullo; Oksana Danylyuk; Barbara Ventura; Beata Koszarna; Anna Tarnowska; N ..., Chemical Communication, 2015

trans-A2B-corroles bearing –OCH2CONHR groups at the ortho position of the meso-phenyl substituent undergo self-organization both in the solid state as well as in solution. The lack of additional donor atoms induces sheet formation, but if the pyridine unit is present in the structure, more ...


Perovskite Microdisk Microlasers Self‐Assembled from Solution

22-Apr-2015 | Qing Liao, Ke Hu, Haihua Zhang, Xuedong Wang, Jiannian Yao, Hongbing Fu, Advanced Materials, 2015

Single‐crystalline square microdisks of CH3NH3PbBr3 are prepared by using a one‐step solution self‐assembly method. Single mode lasing at 557 nm is achieved based on a built‐in whispering gallery mode microresonator at room temperature. By partial replacement of Br with Cl, lasing wavelengths ...


Model of vesicle tubulation and pearling induced by adsorbing particles

22-Apr-2015 | Yu-Cheng Su; Jeff Z Y Chen, Soft Matter, 2015

We study a basic theoretical model for a deformable vesicle immersed in a solution of particles that can adsorb to one of the two surfaces of a membrane. The model consists of an adsorption energy gain for the adsorbing particles and the Canham-Helfrich membrane bending energy, in which the ...


Singlet oxygen generation from Li+@C60 nano-aggregates dispersed by laser irradiation in aqueous solution

22-Apr-2015 | Kei Ohkubo; Naoki Kohno; Yusuke Yamada; Shunichi Fukuzumi, Chemical Communication, 2015

Laser pulse irradiation of a deaerated aqueous solution containing the solid state lithium ion-encapsulated fullerene resulted in the formation of highly dispersed nano-aggregates (Li+@C60)n. Photoirradiation of an O2-saturated D2O solution containing (Li+@C60)n gave singlet oxygen with 55% ...


Mechanistic Studies of Hydrogen Evolution in Aqueous Solution Catalyzed by a Tertpyridine–Amine Cobalt Complex

22-Apr-2015 | Anna Lewandowska-Andralojc; Teera Baine; Xuan Zhao; James T. Muckerman; Etsuko Fujita; Dmitry E. Polyansky, Inorganic Chemistry, 2015

The ability of cobalt-based transition metal complexes to catalyze electrochemical proton reduction to produce molecular hydrogen has resulted in a large number of mechanistic studies involving various cobalt complexes. While the basic mechanism of proton reduction promoted by cobalt species is ...


Electrolyte ion adsorption and charge blocking effect at the hematite/aqueous solution interface: an electrochemical impedance study using multivariate data analysis

22-Apr-2015 | K. Shimizu; J. Nyström; P. Geladi; B. Lindholm-Sethson; J.-F. Boily, Physical Chemistry Chemical Physics, 2015

A model-free multivariate analysis using singular value decomposition is employed to refine an equivalent electrical circuit model in order to probe the electrochemical properties of the hematite/water interface in dilute NaCl and NH4Cl solutions using electrochemical impedance spectroscopy. The ...


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