scholarly journals Review of one-dimensional and two-dimensional nanostructured materials for hydrogen generation

2015 ◽  
Vol 17 (5) ◽  
pp. 2960-2986 ◽  
Author(s):  
Veluru Jagadeesh Babu ◽  
Sesha Vempati ◽  
Tamer Uyar ◽  
Seeram Ramakrishna
Keyword(s):  
Nanostructured Materials ◽  
Fossil Fuels ◽  
Hydrogen Generation ◽  
Attractive Alternative ◽  
Two Dimensional ◽  
One Dimensional

Hydrogen is an attractive alternative to fossil fuels in terms of environmental and other advantages.

scholarly journals One-Dimensional (1D) Nanostructured Materials for Energy Applications

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2609
Author(s):  
Abniel Machín ◽  
Kenneth Fontánez ◽  
Juan C. Arango ◽  
Dayna Ortiz ◽  
Jimmy De León ◽  
...  
Keyword(s):  
Nanostructured Materials ◽  
Fossil Fuels ◽  
High Surface ◽  
High Surface Area ◽  
Future Research ◽  
One Dimensional ◽  
Progressive Movement ◽  
1D Nanostructures ◽  
Energy Applications ◽  
Energy Processes

At present, the world is at the peak of production of traditional fossil fuels. Much of the resources that humanity has been consuming (oil, coal, and natural gas) are coming to an end. The human being faces a future that must necessarily go through a paradigm shift, which includes a progressive movement towards increasingly less polluting and energetically viable resources. In this sense, nanotechnology has a transcendental role in this change. For decades, new materials capable of being used in energy processes have been synthesized, which undoubtedly will be the cornerstone of the future development of the planet. In this review, we report on the current progress in the synthesis and use of one-dimensional (1D) nanostructured materials (specifically nanowires, nanofibers, nanotubes, and nanorods), with compositions based on oxides, nitrides, or metals, for applications related to energy. Due to its extraordinary surface–volume relationship, tunable thermal and transport properties, and its high surface area, these 1D nanostructures have become fundamental elements for the development of energy processes. The most relevant 1D nanomaterials, their different synthesis procedures, and useful methods for assembling 1D nanostructures in functional devices will be presented. Applications in relevant topics such as optoelectronic and photochemical devices, hydrogen production, or energy storage, among others, will be discussed. The present review concludes with a forecast on the directions towards which future research could be directed on this class of nanostructured materials.

Small-Scale, Green-Powered Hydrogen Generation System

2008 ◽  
Author(s):  
David Arruda ◽  
David Browne ◽  
Chris Thongkham ◽  
Mansour Zenouzi
Keyword(s):  
Fossil Fuels ◽  
Hydrogen Generation ◽  
Low Cost ◽  
Hydrogen Gas ◽  
Thermal Design ◽  
Small Scale ◽  
Attractive Alternative ◽  
Hydrogen Fuel ◽  
Generation System ◽  
Average Consumer

One of the major road blocks in the transition from the current oil economy to the future hydrogen fuel economy is the availability of low cost hydrogen fuel for the average consumer. Currently, the price per kilogram of hydrogen fuel is higher than the cost of an equivalent measure of gasoline and its availability is limited to large metropolitan areas. Both of these factors prevent hydrogen from being an attractive alternative to gasoline for most consumers. The goal of this project, in a senior thermal design course, is to design and construct a low-cost hydrogen generation system for residential hydrogen fuel production and storage. The system will be powered by renewable sources of energy; namely a micro-scale wind turbine and a solar panel. The power generated will be used to power a small-scale PEM electrolyzer to produce hydrogen gas that will then be stored at low pressure in a safe, metal hydride storage tank. This relatively low cost system will provide the average consumer with the ability to safely produce hydrogen fuel for use in residential fuel cells or fuel cell-powered vehicles, making hydrogen fuel an attractive alternative to fossil fuels.

scholarly journals Recent Advances of Nanostructured Materials for Photoelectrochemical Bioanalysis

Chemosensors ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 14
Author(s):  
Ling Zhang ◽  
Yuan-Cheng Zhu ◽  
Wei-Wei Zhao
Keyword(s):  
Chemical Composition ◽  
Nanostructured Materials ◽  
Crucial Role ◽  
Three Dimensional ◽  
Morphology Control ◽  
Analytical Performance ◽  
Two Dimensional ◽  
Future Perspectives ◽  
One Dimensional ◽  
Core Elements

Nowadays, the emerging photoelectrochemical (PEC) bioanalysis has drawn intensive interest due to its numerous merits. As one of its core elements, functional nanostructured materials play a crucial role during the construction of PEC biosensors, which can not only be employed as transducers but also act as signal probes. Although both chemical composition and morphology control of nanostructured materials contribute to the excellent analytical performance of PEC bioassay, surveys addressing nanostructures with different dimensionality have rarely been reported. In this review, according to classification based on dimensionality, zero-dimensional, one-dimensional, two-dimensional, and three-dimensional nanostructures used in PEC bioanalysis are evaluated, with an emphasis on the effect of morphology on the detection performances. Furthermore, using the illustration of recent works, related novel PEC biosensing patterns with promising applications are also discussed. Finally, the current challenges and some future perspectives in this field are addressed based on our opinions.

scholarly journals One-dimensional (1D) Nanostructured Materials for Energy Applications

2021 ◽  
Author(s):  
Abniel Machín ◽  
Kenneth Fontánez ◽  
Juan C Arango ◽  
Dayna M Ortiz ◽  
Jimmy De León ◽  
...  
Keyword(s):  
Nanostructured Materials ◽  
Fossil Fuels ◽  
High Surface ◽  
High Surface Area ◽  
Future Research ◽  
One Dimensional ◽  
Progressive Movement ◽  
1D Nanostructures ◽  
Energy Applications ◽  
Energy Processes

At present, the world is at the peak of production of traditional fossil fuels. Much of the resources that humanity has been consuming (oil, coal and natural gas) are coming to an end. The human being faces a future that must necessarily go through a paradigm shift, which includes a progressive movement towards increasingly less polluting and energetically viable resources. In this sense, nanotechnology has a transcendental role in this change. For decades, new materials capable of being used in energy processes have been synthesized that undoubtedly will be the cornerstone of the future development of the planet. In this review, we report on the current progress in the synthesis and use of one-dimensional (1D) nanostructured materials (specifically nanowires, nanofibers, nanotubes and nanorods), with compositions based on oxides, nitrides, or metals, for applications related to energy. Due to its extraordinary surface-volume relationship, tunable thermal and transport properties, and its high surface area, these 1D nanostructures have become fundamental elements for the development of energy processes. The most relevant 1D nanomaterials, their different synthesis procedures, and useful methods for assembling 1D nanostructures in functional devices will be presented. Applications in relevant topics such as optoelectronic and photochemical devices, hydrogen production or energy storage, among others, will be discussed. The present review concludes with a forecast on the directions towards which future research could be directed on this class of nanostructured materials.

A one-dimensional self-gravitating stellar gas

1966 ◽  
Vol 25 ◽  
pp. 46-48 ◽  
Author(s):  
M. Lecar
Keyword(s):  
Gravitational Field ◽  
Phase Space ◽  
Motion Picture ◽  
Space Distribution ◽  
Two Dimensional ◽  
One Dimensional ◽  
Phase Space Distribution ◽  
Dimensional Phase Space ◽  
The Mean

“Dynamical mixing”, i.e. relaxation of a stellar phase space distribution through interaction with the mean gravitational field, is numerically investigated for a one-dimensional self-gravitating stellar gas. Qualitative results are presented in the form of a motion picture of the flow of phase points (representing homogeneous slabs of stars) in two-dimensional phase space.

State-of-the-Art of Modeling Surface Water Impoundments

1982 ◽  
Vol 14 (1-2) ◽  
pp. 241-261 ◽  
Author(s):  
P A Krenkel ◽  
R H French
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
State Of The Art ◽  
Rate Coefficients ◽  
Two Dimensional ◽  
One Dimensional ◽  
Integral Energy ◽  
Range Of Values ◽  
Dimensional Integral ◽  
Water Impoundment

The state-of-the-art of surface water impoundment modeling is examined from the viewpoints of both hydrodynamics and water quality. In the area of hydrodynamics current one dimensional integral energy and two dimensional models are discussed. In the area of water quality, the formulations used for various parameters are presented with a range of values for the associated rate coefficients.

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