A Study of Factors Affecting the Hydrogen Uptake Efficiency of Titanium in Sodium Hydroxide Solutions

2009 ◽  
pp. 222-222-14 ◽  
Author(s):  
LC Covington ◽  
NG Feige
Keyword(s):  
Sodium Hydroxide ◽  
Hydrogen Uptake ◽  
Factors Affecting ◽  
Uptake Efficiency

scholarly journals Factors Affecting Hydrogen Adsorption in Metal–Organic Frameworks: A Short Review

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1638
Author(s):  
Vladimír Zeleňák ◽  
Ivan Saldan
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Adsorption ◽  
Metal Organic Frameworks ◽  
Hydrogen Uptake ◽  
Short Review ◽  
High Rate ◽  
New Approach ◽  
Factors Affecting ◽  
Metal Organic ◽  
Near Future

Metal–organic frameworks (MOFs) have significant potential for hydrogen storage. The main benefit of MOFs is their reversible and high-rate hydrogen adsorption process, whereas their biggest disadvantage is related to their operation at very low temperatures. In this study, we describe selected examples of MOF structures studied for hydrogen adsorption and different factors affecting hydrogen adsorption in MOFs. Approaches to improving hydrogen uptake are reviewed, including surface area and pore volume, in addition to the value of isosteric enthalpy of hydrogen adsorption. Nanoconfinement of metal hydrides inside MOFs is proposed as a new approach to hydrogen storage. Conclusions regarding MOFs with incorporated metal nanoparticles, which may be used as nanoscaffolds and/or H2 sorbents, are summarized as prospects for the near future.

Factors Affecting the Compressive Strength of Class C Fly Ash Geopolymer

2011 ◽  
Vol 99-100 ◽  
pp. 960-964 ◽  
Author(s):  
Xue Ying Li ◽  
En Zu Zheng ◽  
Chun Long Ma
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Sodium Hydroxide ◽  
Delay Time ◽  
Curing Temperature ◽  
Mixed Solution ◽  
Mass Ratio ◽  
Curing Conditions ◽  
Factors Affecting ◽  
Class C

The compressive strength of geopolymer prepared from a class C fly ash (CFA) at different curing conditions and mass ratio of water to fly ash were investigated. The geopolymer was activated with a mixed solution of sodium hydroxide (NaOH) and sodium silicate. The results revealed that the obtained compressive strength was in the range of 11.7~61.9MPa and the compressive strength decreased with the increment of the mass ratio of water to CFA (W/F). The geopolymer samples with the highest strength were obtained when W/F was 0.30 with proper delay time 1d before being demoulded and then followed by curing at 60°C for 24h. For geopolymer with lower W/F (0.30), its optimum curing temperature was better not higher than 60°C, however, for the higher W/F, the curing temperature was suit to more than 70°C.

Hydrogen uptake efficiency of mesoporous carbon nanofiber and its structural factors to determine the uptake efficiency

2010 ◽  
Vol 205 ◽  
pp. S99-S103 ◽  
Author(s):  
Ji-Eun Im ◽  
Seung-Lim Oh ◽  
Kyong-Hoon Choi ◽  
Kang-Kyun Wang ◽  
Soyoung Jung ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Carbon Nanofiber ◽  
Hydrogen Uptake ◽  
Structural Factors ◽  
Uptake Efficiency

scholarly journals Making Biodegradable Seedling Pots from Textile and Paper Waste—Part A: Factors Affecting Tensile Strength

2021 ◽  
Vol 18 (13) ◽  
pp. 6964
Author(s):  
Jeanger P. Juanga-Labayen ◽  
Qiuyan Yuan
Keyword(s):  
Tensile Strength ◽  
Sodium Bicarbonate ◽  
Sodium Hydroxide ◽  
Alkali Treatment ◽  
Compressive Load ◽  
Factors Affecting ◽  
Paper Waste ◽  
Binding Agents ◽  
Compressive Loads ◽  
Corrugated Cardboard

This study investigates the efficacy of using discarded textile (cotton and polycotton) and paper waste (newspaper and corrugated cardboard) as substrates to form sheets with optimum tensile strength. The effect of alkali treatment (sodium hydroxide (NaOH) and sodium bicarbonate (NaHCO3)), compressive loads (200 N and 500 N), and the use of binding agents (blackstrap molasses, sodium alginate, and cornstarch) were studied to optimize the tensile strength of homogeneous sheets. The alkali treatment using 5% NaOH for 5 h of soaking demonstrated the highest increase in tensile strength of 21% and 19% for cotton and newspaper, respectively. Increasing compressive load from 200 N to 500 N showed the highest increase in tensile strength of 37% and 42% for cotton and newspaper, respectively. Remarkably, among the binders, cornstarch at 20% concentration obtained an increase in tensile strength of 395%, 320%, 310%, and 185% for cotton, polycotton, corrugated cardboard, and newspaper sheets, respectively. The optimum results obtained from this study will be utilized to develop biodegradable seedling pots using discarded textile and paper waste.

Epitaxial Chemical Deposition of ZnO Nanocolumns from NaOH Solutions

2004 ◽  
Vol 822 ◽  
Author(s):  
Renee B. Peterson ◽  
Clark L. Fields ◽  
Brian A. Gregg
Keyword(s):  
Crystal Growth ◽  
Sodium Hydroxide ◽  
Chemical Deposition ◽  
New Method ◽  
Growth Theory ◽  
Complexing Agents ◽  
Factors Affecting ◽  
Coated Glass ◽  
Bare Glass ◽  
Substrate Cleaning

AbstractA new method of depositing epitaxial ZnO nanocolumns on sputter-coated ZnO substrates is described that utilizes supersaturated zincate species in sodium hydroxide solutions and requires no complexing agents. Uniform arrays of columns are grown reproducibly over entire substrates in 10 to 50 min. Columns are 50 to 2000 nm long and 50 to 100 nm wide. Strict substrate cleaning and/or preparations are not necessary with this method, in contrast to many other techniques. Films grow only on substrates pre-coated with ZnO, not on bare glass or ITOor SnO2-coated glass. Factors affecting the column growth are elucidated and experimental observations are correlated with crystal growth theory.

Sign in / Sign up

Export Citation Format

Share Document