The Experts below are selected from a list of 116817 Experts worldwide ranked by ideXlab platform
Hongjie Zhang - One of the best experts on this subject based on the ideXlab platform.
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room temperature template free synthesis of bioi Hierarchical Structures visible light photocatalytic and electrochemical hydrogen storage properties
Dalton Transactions, 2010Co-Authors: Guanhua Wang, Shuyan Song, Min Pang, Jinkui Tang, Hongjie ZhangAbstract:Three-dimensional (3D) flower-like BiOI Hierarchical Structures have been successfully synthesized by a solution route at room temperature. The obtained sample was systematically studied by powder X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). It is noteworthy that no surfactant or assisted reagent was needed during the formation of this uniform flower-like structure. It was proposed that primary nanoflakes of Bi-EtOH complexes were initially formed in the solution, and then anisotropic growth led to the development of 3D flowerlike Structures. In addition, the photocatalytic property of the sample under visible-light was investigated with three types of dye: heteropolyaromatic (Methylene Blue (MB)), azoic (Methyl Orange (MO)) and phenol (rhodamine B (RhB)). High photocatalytic activity was observed for the phenol dye RhB. The electrochemical hydrogen storage properties were also investigated.
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facile synthesis and assemblies of flowerlike sns2 and in3 doped sns2 Hierarchical Structures and their enhanced photocatalytic property
Journal of Physical Chemistry C, 2009Co-Authors: Yongqian Lei, Shuyan Song, Weiqiang Fan, Yan Xing, Hongjie ZhangAbstract:Novel flowerlike SnS2 and In3+-doped SnS2 Hierarchical Structures have been successfully synthesized by a simple hydrothermal route using biomolecular l-cysteine-assisted methods. The l-cysteine plays an important role both as assistant and as sulfur source. Experiments with various parameters indicate that the pH values have a strong effect on the morphology of the assembly. Based on the experiments, a growth mechanical process was proposed. The synthetic samples were characterized by XRD, SEM, TEM (HRTEM), BET measurement, TGA, and XPS in detail. Further investigation of the photocatalytic degradation of three different dyes, methylene blue, methylene green, and ethyl violet, indicate that both samples have high photocatalytic activity, and the doped In3+ has enhanced the photoactivity of SnS2.
S M Olaizola - One of the best experts on this subject based on the ideXlab platform.
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femtosecond laser fabrication of highly hydrophobic stainless steel surface with Hierarchical Structures fabricated by combining ordered microStructures and lipss
Applied Surface Science, 2016Co-Authors: M Martinezcaldero, A Rodriguez, A Diasponte, Maria Carme Morantminana, M Gomezaranzadi, S M OlaizolaAbstract:Abstract In this work we have developed Hierarchical Structures that consist of micro-patterned surfaces covered by nanoStructures with a femtosecond laser. The first part of this work is a study to determine the microscale modifications produced on a stainless steel alloy (AISI304) surface at high pulse energy, different velocities, and number of overscans in order to obtain microStructures with a selected depth of around 10 μm and line widths of 20 μm. The second part of the work is focused on finding the optimal irradiation parameters to obtain the nanostructure pattern. NanoStructures have been defined by means of Laser Induced Periodical Surface Structures (LIPSS) around 250 nm high and a period of 580 nm, which constitute the nanostructure pattern. Finally, dual scale gratings of 50 mm 2 were fabricated with different geometries and their effect on the measured contact angle. Combining the micro-pattern with the LIPSS nano-pattern, highly hydrophobic surfaces have been developed with measured static contact angles higher than 150° on a stainless steel alloy.
Shuyan Song - One of the best experts on this subject based on the ideXlab platform.
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room temperature template free synthesis of bioi Hierarchical Structures visible light photocatalytic and electrochemical hydrogen storage properties
Dalton Transactions, 2010Co-Authors: Guanhua Wang, Shuyan Song, Min Pang, Jinkui Tang, Hongjie ZhangAbstract:Three-dimensional (3D) flower-like BiOI Hierarchical Structures have been successfully synthesized by a solution route at room temperature. The obtained sample was systematically studied by powder X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). It is noteworthy that no surfactant or assisted reagent was needed during the formation of this uniform flower-like structure. It was proposed that primary nanoflakes of Bi-EtOH complexes were initially formed in the solution, and then anisotropic growth led to the development of 3D flowerlike Structures. In addition, the photocatalytic property of the sample under visible-light was investigated with three types of dye: heteropolyaromatic (Methylene Blue (MB)), azoic (Methyl Orange (MO)) and phenol (rhodamine B (RhB)). High photocatalytic activity was observed for the phenol dye RhB. The electrochemical hydrogen storage properties were also investigated.
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facile synthesis and assemblies of flowerlike sns2 and in3 doped sns2 Hierarchical Structures and their enhanced photocatalytic property
Journal of Physical Chemistry C, 2009Co-Authors: Yongqian Lei, Shuyan Song, Weiqiang Fan, Yan Xing, Hongjie ZhangAbstract:Novel flowerlike SnS2 and In3+-doped SnS2 Hierarchical Structures have been successfully synthesized by a simple hydrothermal route using biomolecular l-cysteine-assisted methods. The l-cysteine plays an important role both as assistant and as sulfur source. Experiments with various parameters indicate that the pH values have a strong effect on the morphology of the assembly. Based on the experiments, a growth mechanical process was proposed. The synthetic samples were characterized by XRD, SEM, TEM (HRTEM), BET measurement, TGA, and XPS in detail. Further investigation of the photocatalytic degradation of three different dyes, methylene blue, methylene green, and ethyl violet, indicate that both samples have high photocatalytic activity, and the doped In3+ has enhanced the photoactivity of SnS2.
Shuangfeng Yin - One of the best experts on this subject based on the ideXlab platform.
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room temperature synthesis of flower like biox x cl br i Hierarchical Structures and their visible light photocatalytic activity
Inorganic Chemistry, 2013Co-Authors: Lang Chen, Rui Huang, Miao Xiong, Qing Yuan, Jing Jia, Mengyuan Yao, Shenglian Luo, Shuangfeng YinAbstract:A simple method for facile synthesis of three-dimensional (3D) bismuth oxyhalide (BiOX, X═Cl, Br, I) Hierarchical Structures at room temperature has been developed. Under the influence of l-lysine surfactant, the bismuth and halogen (Cl, Br, I) sources hydrolyze and self-assemble into flower-like Hierarchical architectures within 10 min. The resulted materials were characterized by XRD, FESEM, TEM, UV–vis DRS, and N2 adsorption–desorption techniques. We found that l-lysine is indispensable for their formation and the amount of HX has great effect on the final morphology. The BiOX (X═Cl, Br, I) Hierarchical architectures are composed of single-crystalline nanoplates. We propose an amino-and-carboxyl structure-directing mechanism for the formation of the Hierarchical Structures. To evaluate the photocatalytic activity of the as-prepared materials, rhodamine-B was employed as a probe dye for degradation under visible light. All of the BiOX (X═Cl, Br, I) with 3D architectures show higher photocatalytic activi...
Patrik Schmuki - One of the best experts on this subject based on the ideXlab platform.
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tio2 nanotubes with laterally spaced ordering enable optimized Hierarchical Structures with significantly enhanced photocatalytic h2 generation
Nanoscale, 2016Co-Authors: Nhat Truong Nguyen, Selda Ozkan, Imgon Hwang, Anca Mazare, Patrik SchmukiAbstract:In the present work we grow self-organized TiO2 nanotube arrays with a defined and controlled regular spacing between individual nanotubes. These defined intertube gaps allow one to build up Hierarchical 1D-branched Structures, conformally coated on the nanotube walls using a layer by layer nanoparticle TiO2 decoration of the individual tubes, i.e. having not only a high control over the TiO2 nanotube host structure but also on the harvesting layers. After optimizing the intertube spacing, we build host–guest arrays that show a drastically enhanced performance in photocatalytic H2 generation, compared to any arrangement of conventional TiO2 nanotubes or conventional TiO2 nanoparticle layers. We show this beneficial effect to be due to a combination of an increased large surface area (mainly provided by the nanoparticle layers) with a fast transport of the harvested charge within the passivated 1D nanotubes. We anticipate that this type of Hierarchical Structures based on TiO2 nanotubes with adjustable spacing will find even wider application, as they provide an unprecedented controllable combination of surface area and carrier transport.