scholarly journals Room temperature sintering of polar ZnO nanosheets: I-evidence

2017 ◽  
Vol 19 (25) ◽  
pp. 16406-16412 ◽  
Author(s):  
Amparo Fernández-Pérez ◽  
Verónica Rodríguez-Casado ◽  
Teresa Valdés-Solís ◽  
Gregorio Marbán
Keyword(s):  
Surface Area ◽  
Room Temperature ◽  
Zno Nanosheets

Unambiguous evidence of the spontaneous loss of surface area at room temperature in polar ZnO.

The Reactivity of Different Active Forms of Sodium Carbonate with Respect to Sulfur Dioxide

1992 ◽  
Vol 57 (11) ◽  
pp. 2302-2308
Author(s):  
Karel Mocek ◽  
Erich Lippert ◽  
Emerich Erdös
Keyword(s):  
Thermal Decomposition ◽  
Liquid Phase ◽  
Sulfur Dioxide ◽  
Specific Surface ◽  
Surface Area ◽  
Sodium Carbonate ◽  
Room Temperature ◽  
Active Form ◽  
The Other ◽  
Kinetics Of

The kinetics of the reaction of solid sodium carbonate with sulfur dioxide depends on the microstructure of the solid, which in turn is affected by the way and conditions of its preparation. The active form, analogous to that obtained by thermal decomposition of NaHCO3, emerges from the dehydration of Na2CO3 . 10 H2O in a vacuum or its weathering in air at room temperature. The two active forms are porous and have approximately the same specific surface area. Partial hydration of the active Na2CO3 in air at room temperature followed by thermal dehydration does not bring about a significant decrease in reactivity. On the other hand, if the preparation of anhydrous Na2CO3 involves, partly or completely, the liquid phase, the reactivity of the product is substantially lower.

Facile room-temperature solution-phase synthesis of a spherical covalent organic framework for high-resolution chromatographic separation

2015 ◽  
Vol 51 (61) ◽  
pp. 12254-12257 ◽  
Author(s):  
Cheng-Xiong Yang ◽  
Chang Liu ◽  
Yi-Meng Cao ◽  
Xiu-Ping Yan
Keyword(s):  
High Resolution ◽  
Surface Area ◽  
Chromatographic Separation ◽  
Room Temperature ◽  
Solution Phase ◽  
Phase Synthesis ◽  
Covalent Organic Framework ◽  
Solution Phase Synthesis ◽  
Temperature Solution ◽  
Organic Framework

Facile room-temperature solution-phase synthesis of a spherical covalent organic framework with large surface area and good stability for high-resolution chromatographic separation.

Hydrogen Redistribution in Technically Pure Titanium Alloy under X-Ray Exposure at Room Temperature

2014 ◽  
Vol 880 ◽  
pp. 74-79 ◽  
Author(s):  
Viktor N. Kudiiarov ◽  
Andrey M. Lider ◽  
Natalya S. Pushilina
Keyword(s):  
Titanium Alloy ◽  
Surface Area ◽  
Exposure Time ◽  
Room Temperature ◽  
Hydrogen Diffusion ◽  
Pure Titanium ◽  
Hydrogen Desorption ◽  
X Rays ◽  
X Ray ◽  
State Increase

This paper presents experimental results in study of hydrogen redistribution in technically pure titanium alloy under X-ray exposure at room temperature. It is demonstrated that X-ray exposure to titanium with hydrogen affects hydrogen diffusion and redistribution from the surface area to the depth of the samples irrespective of hydrogen condition in titanium: in hydride form or dissolved state. Increase of the exposure time increases the amount of hydrogen redistributed. Hydrogen desorption during irradiation by X-rays at room temperature does not happen.

Ferromagnetism in High-Surface-Area ZnO Nanosheets Prepared by a Template-Assisted Hydrothermal Method

2018 ◽  
Vol 35 (6) ◽  
pp. 067501
Author(s):  
Hui-Fang Yang ◽  
Ling-Zhi Tang ◽  
Qiang Sun ◽  
Lei Sun ◽  
Zhen-Hua Li ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Zno Nanosheets

scholarly journals The synthesis of a BiOClxBr1−x nanostructure photocatalyst with high surface area for the enhanced visible-light photocatalytic reduction of Cr(vi)

RSC Advances ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 4763-4771 ◽  
Author(s):  
Muhammad Bilal Hussain ◽  
Malik Saddam Khan ◽  
Herman Maloko Loussala ◽  
Muhammad Sohail Bashir
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
Room Temperature ◽  
High Surface ◽  
High Surface Area ◽  
Photocatalytic Reduction ◽  
Synthetic Process ◽  
Visible Light Photocatalytic

Cr(vi) reduction is performed by BiOCl0.8Br0.2 composite produced via a facile in situ synthetic process at room temperature while making use of PVP (Mw = 10 000).

scholarly journals A superhydrophobic hyper-cross-linked polymer synthesized at room temperature used as an efficient adsorbent for volatile organic compounds

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 97048-97054 ◽  
Author(s):  
Junhui Wang ◽  
Wan-Qiu Wang ◽  
Zhengping Hao ◽  
Gang Wang ◽  
Yang Li ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Surface Area ◽  
Organic Compounds ◽  
Room Temperature ◽  
Large Surface Area ◽  
High Adsorption ◽  
Volatile Organic ◽  
Efficient Adsorbent

The hyper-cross-linked polymers CLBE-xwere prepared at room temperature and exhibit a large surface area, super-hydrophobicity and high adsorption for benzene.

scholarly journals Photoconductivity of activated carbon fibers

1991 ◽  
Vol 6 (5) ◽  
pp. 1040-1047 ◽  
Author(s):  
K. Kuriyama ◽  
M.S. Dresselhaus
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Carbon Fibers ◽  
Low Temperatures ◽  
Room Temperature ◽  
High Surface ◽  
Localized States ◽  
Activated Carbon Fibers ◽  
Disordered Carbon ◽  
Increasing Temperature

The conductivity and photoconductivity are measured on a high-surface-area disordered carbon material, i.e., activated carbon fibers, to investigate their electronic properties. This material is a highly disordered carbon derived from a phenolic precursor, having a huge specific surface area of 1000–2000 m2/g. Our preliminary thermopower measurements show that the dominant carriers are holes at room temperature. The x-ray diffraction pattern reveals that the microstructure is amorphous-like with Lc ≃ 10 Å. The intrinsic electrical conductivity, on the order of 20 S/cm at room temperature, increases by a factor of several with increasing temperature in the range 30–290 K. In contrast, the photoconductivity in vacuum decreases with increasing temperature. The magnitude of the photoconductive signal was reduced by a factor of ten when the sample was exposed to air. The recombination kinetics changes from a monomolecular process at room temperature to a bimolecular process at low temperatures, indicative of an increase in the photocarrier density at low temperatures. The high density of localized states, which limits the motion of carriers and results in a slow recombination process, is responsible for the observed photoconductivity.

Selective Hydrogenation of Phenol Catalyzed by Palladium on High-Surface-Area Ceria at Room Temperature and Ambient Pressure

ACS Catalysis ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 2051-2061 ◽  
Author(s):  
Nicholas C. Nelson ◽  
J. Sebastián Manzano ◽  
Aaron D. Sadow ◽  
Steven H. Overbury ◽  
Igor I. Slowing
Keyword(s):  
Surface Area ◽  
Selective Hydrogenation ◽  
Room Temperature ◽  
Ambient Pressure ◽  
High Surface ◽  
High Surface Area
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