Diethylenetriamine-mediated self-assembly of three-dimensional hierarchical nanoporous CoP nanoflowers/pristine graphene interconnected networks as efficient electrocatalysts toward hydrogen evolution

2017 ◽  
Vol 1 (10) ◽  
pp. 2172-2180 ◽  
Author(s):  
Xiuling Fan ◽  
Xiaoyan Wang ◽  
Weiyong Yuan ◽  
Chang Ming Li
Keyword(s):  
Hydrogen Evolution ◽  
Self Assembly ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Pristine Graphene ◽  
Interconnected Network ◽  
Interconnected Networks

A 3D hierarchical nanoporous CoP nanoflowers/graphene interconnected network was synthesized via DETA-mediated self-assembly, showing superior HER catalytic performance.

Facile Synthesis of Graphene-Based Aerogels and Their Applications for Adsorption of Heavy Metal Ions

2019 ◽  
Vol 18 (02) ◽  
pp. 1850019
Author(s):  
Huiyuan Yu ◽  
Jiayi Zhu ◽  
Hongbo Ren ◽  
Shuxin Liu
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Self Assembly ◽  
Heavy Metal Ions ◽  
Three Dimensional ◽  
Annealing Process ◽  
Interconnected Network ◽  
Facile Synthesis ◽  
Thermal Annealing Process ◽  
Highly Porous

Graphene-based aerogels with a three-dimensional interconnected network were fabricated via the hydrothermal self-assembly and thermal-annealing process. The aerogels were characterized by means of scanning electron microscopy and atomic absorption spectroscopy. The graphene-based aerogels showed highly porous structure and adsorption capacity for heavy metal ions. Thus, they would be the promising materials for removal of heavy metal ions from water.

Self-assembly of three-dimensional CdS nanosphere/graphene networks for efficient photocatalytic hydrogen evolution

2019 ◽  
Vol 31 ◽  
pp. 34-38 ◽  
Author(s):  
Zhijian Wang ◽  
Zhi Liu ◽  
Jiazang Chen ◽  
Hongbin Yang ◽  
Jianqiang Luo ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Self Assembly ◽  
Three Dimensional ◽  
Photocatalytic Hydrogen Evolution

scholarly journals Direct Self-Assembly of Hierarchically Grown Rhodium Thin Films for Electrocatalytic Hydrogen Evolution Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 338
Author(s):  
Muhammad Ali Ehsan ◽  
Alaaldin Adam ◽  
Abdul Rehman ◽  
Mohammad Qamar
Keyword(s):  
Thin Films ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Self Assembly ◽  
Nickel Foam ◽  
Chemical Vapor ◽  
Catalytic Performance ◽  
Structural Features ◽  
Growth Time ◽  
Vapor Deposition Technique

Thin films of metallic rhodium (Rh) are developed on two different supports, nickel foam (NF) and titanium foil (Ti), and evaluated for electrochemical hydrogen evolution reaction (HER). The electrodes are prepared by aerosol-assisted chemical vapor deposition technique using a Rh diethyldithiocarabamte precursor for three distinct time periods of 40, 80, and 120 min at 500 °C. The film consists of phase pure metallic Rh with hierarchical flower-like morphology. The structural features of such nanostructures can be modulated by adjusting the growth time. The HER catalytic performance data for the optimized films (i.e., with the deposition time of 80 min) suggest that the Rh deposited on Ti foil (Rh/Ti) catalyze the reaction substantially faster than Rh deposited on Ni foam (Rh/NF). To produce current density of 100 mA cm−2, the Rh/NF needed over potential of 263 mV, while the Rh/Ti electrode required only 175 mV. In spite of lower electrical conductivity, caused by the bare Ti foil, the Rh/Ti electrode exhibits superior HER performance. The Tafel slopes of Rh/NF and Rh/Ti electrodes are determined to be 52 and 42 mV dec−1, while the turnover frequencies are estimated to be 1.1 and 37.3 s−1 at over potential of 260 mV.

Three-dimensional interconnected network of nanoporous CoP nanowires as an efficient hydrogen evolution cathode

2014 ◽  
Vol 16 (32) ◽  
pp. 16909 ◽  
Author(s):  
Shuang Gu ◽  
Hongfang Du ◽  
Abdullah M. Asiri ◽  
Xuping Sun ◽  
Chang Ming Li
Keyword(s):  
Hydrogen Evolution ◽  
Three Dimensional ◽  
Interconnected Network

Controlled self-assembly of Ni foam supported poly(ethyleneimine)/reduced graphene oxide three-dimensional composite electrodes with remarkable synergistic effects for efficient oxygen evolution

2017 ◽  
Vol 5 (3) ◽  
pp. 1201-1210 ◽  
Author(s):  
Ming Zhao ◽  
Weiyong Yuan ◽  
Chang Ming Li
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Self Assembly ◽  
Synergistic Effects ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Composite Electrodes ◽  
Ni Foam ◽  
Synergistic Interactions ◽  
Reduced Graphene

Ni foam supported PEI/RGO 3-D composite electrodes were controllably self-assembled, showing superior OER catalytic performance attributed to remarkable synergistic interactions.

In vitro and in vivo polysaccharides assembly: ultrastructural and cytochemical study of growing plant cell wall components.

1978 ◽  
Vol 36 (2) ◽  
pp. 434-435
Author(s):  
D. Reis ◽  
B. Vian ◽  
J. C. Roland
Keyword(s):  
Cell Wall ◽  
Self Assembly ◽  
Plant Cell Wall ◽  
Higher Plants ◽  
Three Dimensional ◽  
Cytochemical Study ◽  
Wall Components

Wall morphogenesis in higher plants is a problem still open to controversy. Until now the possibility of a transmembrane control and the involvement of microtubules were mostly envisaged. Self-assembly processes have been observed in the case of walls of Chlamydomonas and bacteria. Spontaneous gelling interactions between xanthan and galactomannan from Ceratonia have been analyzed very recently. The present work provides indications that some processes of spontaneous aggregation could occur in higher plants during the formation and expansion of cell wall.Observations were performed on hypocotyl of mung bean (Phaseolus aureus) for which growth characteristics and wall composition have been previously defined.In situ, the walls of actively growing cells (primary walls) show an ordered three-dimensional organization (fig. 1). The wall is typically polylamellate with multifibrillar layers alternately transverse and longitudinal. Between these layers intermediate strata exist in which the orientation of microfibrils progressively rotates. Thus a progressive change in the morphogenetic activity occurs.

Optimizing electron density of nickel sulfide electrocatalysts through sulfur vacancy engineering for alkaline hydrogen evolution

2020 ◽  
Vol 8 (35) ◽  
pp. 18207-18214
Author(s):  
Dongbo Jia ◽  
Lili Han ◽  
Ying Li ◽  
Wenjun He ◽  
Caichi Liu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Electron Density ◽  
Rational Design ◽  
Nickel Sulfide ◽  
Catalytic Performance ◽  
Sulfide Catalysts ◽  
Sulfur Vacancy

A novel, rational design for porous S-vacancy nickel sulfide catalysts with remarkable catalytic performance for alkaline HER.

Nanoscale Self-Assembly Using Ion and Electron Beam Techniques: A Rapid Review

MRS Advances ◽  
2020 ◽  
Vol 5 (64) ◽  
pp. 3507-3520
Author(s):  
Chunhui Dai ◽  
Kriti Agarwal ◽  
Jeong-Hyun Cho
Keyword(s):  
Electron Beam ◽  
Self Assembly ◽  
Ion Beam ◽  
Three Dimensional ◽  
The Self ◽  
Stress Generation ◽  
Rapid Review ◽  
High Yield ◽  
3D Nanostructures ◽  
Self Assembled

AbstractNanoscale self-assembly, as a technique to transform two-dimensional (2D) planar patterns into three-dimensional (3D) nanoscale architectures, has achieved tremendous success in the past decade. However, an assembly process at nanoscale is easily affected by small unavoidable variations in sample conditions and reaction environment, resulting in a low yield. Recently, in-situ monitored self-assembly based on ion and electron irradiation has stood out as a promising candidate to overcome this limitation. The usage of ion and electron beam allows stress generation and real-time observation simultaneously, which significantly enhances the controllability of self-assembly. This enables the realization of various complex 3D nanostructures with a high yield. The additional dimension of the self-assembled 3D nanostructures opens the possibility to explore novel properties that cannot be demonstrated in 2D planar patterns. Here, we present a rapid review on the recent achievements and challenges in nanoscale self-assembly using electron and ion beam techniques, followed by a discussion of the novel optical properties achieved in the self-assembled 3D nanostructures.

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