Magnetomicropore filling of supercritical nitric oxide onto activated carbon fibers: role of porosity and surface functional groups

Langmuir ◽  
1992 ◽  
Vol 8 (2) ◽  
pp. 624-629 ◽  
Author(s):  
Hiroyuki Uchiyama ◽  
Katsumi Kaneko ◽  
Sumio Ozeki
Keyword(s):  
Nitric Oxide ◽  
Activated Carbon ◽  
Functional Groups ◽  
Carbon Fibers ◽  
Activated Carbon Fibers ◽  
Surface Functional Groups

Preparation and characterization of activated carbon fibers from liquefied wood by KOH activation

Holzforschung ◽  
2016 ◽  
Vol 70 (3) ◽  
pp. 195-202 ◽  
Author(s):  
Yuxiang Huang ◽  
Guangjie Zhao
Keyword(s):  
Activated Carbon ◽  
Functional Groups ◽  
Carbon Fibers ◽  
Chemical Activation ◽  
Bet Surface Area ◽  
Koh Activation ◽  
Activated Carbon Fibers ◽  
Surface Functional Groups ◽  
X Ray ◽  
Liquefied Wood

Abstract Activated carbon fibers (ACFs) have been prepared from liquefied wood (Wliq) by chemical activation with KOH, with a particular focus on the effect of KOH/fiber ratio in term of porous texture and surface chemistry. ACFs based on steam activation served as a blank for comparison. The properties of the ACFs were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), nitrogen adsorption/desorption, Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results show that the KOH-activated ACFs have rougher surfaces and more amorphous structure compared with the blank. The pore development was significant when the KOH/fiber ratio reached 3, and achieved a maximum Brunauer-Emmett-Teller (BET) surface area of 1371 m2 g-1 and total pore volume (Vtot) of 0.777 cm3 g-1, of which 45.3% belong to mesopores with diameters of 2–4 nm, while the blank activated at the same temperature had a BET surface of 1250 m2 g-1 and Vtot of 0.644 cm3 g-1, which are mainly micropores. The surface functional groups are closely associated with the KOH/fiber ratios. KOH-activated ACFs with KOH/fiber ratio of 3 have more oxygenated surface functional groups (C-O, C=O, -COOH) than the blank.

Enhancement of nitric oxide dimerization by micropore fields of activated carbon fibers

Langmuir ◽  
1989 ◽  
Vol 5 (4) ◽  
pp. 960-965 ◽  
Author(s):  
Katsumi Kaneko ◽  
Naomi Fukuzaki ◽  
Kazunori Kakei ◽  
Takaomi Suzuki ◽  
Sumio Ozeki
Keyword(s):  
Nitric Oxide ◽  
Activated Carbon ◽  
Carbon Fibers ◽  
Activated Carbon Fibers

Role of Carboxylic Sites in the Adsorption of Nickel (II) and Zinc (II) onto Plain and Oxidized Activated Carbon Fibers

2013 ◽  
Vol 224 (7) ◽  
Author(s):  
M. S. Berber-Mendoza ◽  
R. Leyva-Ramos ◽  
F. J. Cerino-Cordoba ◽  
J. Mendoza-Barron ◽  
H. J. Amezquita Garcia ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Activated Carbon Fibers ◽  
Oxidized Activated Carbon

Microstructure and Oxygen Functional Groups on Modified Liquefied Wooden Activated Carbon Fibers with Hydrogen Peroxide

2013 ◽  
Vol 433-435 ◽  
pp. 2003-2007 ◽  
Author(s):  
Wei Gao ◽  
Gaungjie Zhao
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Surface Area ◽  
Functional Groups ◽  
Carbon Fibers ◽  
Photoelectron Spectroscopy ◽  
Density Functional ◽  
Activated Carbon Fibers ◽  
Average Pore ◽  
Oxygen Functional Groups

The aim of this study is to investigate changes in microstructure and oxygen functional groups of liquefied wood activated carbon fibers using density functional theory, FTIR, X-ray photoelectron spectroscopy. Samples were immersed with hydrogen peroxide (H2O2) at three concentrations (15, 20, and 25 wt%), three temperatures (90, 70, and 50 °C) for three periods of time (1, 2, and 3 h). The results reveals that the pores average radius narrow, and micropores turn into mesopores or macropores with the increasing process, which brings about the surface area of treated samples decrease. Numerous oxygen functional groups are observed in the treated samples, and the ratios of oxygen and carbon increase from 3.2% before treated to 14.7% with H2O2 modification. The results confirm that the average pore radius and surface area decrease during treatment due to concentration and temperature. What is more, oxygen functional groups increase significantly with increasing treatment concentration.

Key role of activated carbon fibers in enhanced decomposition of pollutants using heterogeneous cobalt/peroxymonosulfate system

2015 ◽  
Vol 91 (5) ◽  
pp. 1257-1265 ◽  
Author(s):  
Zhenfu Huang ◽  
Haiwei Bao ◽  
Yuyuan Yao ◽  
Jiateng Lu ◽  
Wangyang Lu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Activated Carbon Fibers

A high-performance supercapacitor based on activated carbon fibers with an optimized pore structure and oxygen-containing functional groups

2017 ◽  
Vol 1 (5) ◽  
pp. 958-966 ◽  
Author(s):  
Kai Zhu ◽  
Yu Wang ◽  
Joel A. Tang ◽  
Shaohua Guo ◽  
Zhongmin Gao ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Pore Structure ◽  
Functional Groups ◽  
Carbon Fibers ◽  
High Performance ◽  
Cycling Performance ◽  
Activated Carbon Fibers ◽  
Pore Structures

Activated carbon fibers with optimized pore structures and oxygen-containing functional groups display a remarkable capacitance and an excellent cycling performance.

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