Polyacrylonitrile-based activated carbon fibers (ACFs), modified using potassium hydroxide (KOH) or tetraethylenepentamine (TEPA), were investigated for dioxide (CO2) adsorption, which is one of the promising alleviation approaches global warming. The CO2 adsorption isotherms measured, and values isosteric heat calculated. results showed that KOH-modified ACFs exhibited a great deal pore volume, specific surface area 1565 m2/g was obtained. KOH activation made nitrogen atoms easily able to...

Microporous activated carbon fibers (ACFs) were developed for CO2 capture based on potassium hydroxide (KOH) activation and tetraethylenepentamine (TEPA) amination. The material properties of the modified ACFs characterized using several techniques. adsorption breakthrough curves measured effect relative humidity in carrier gas was determined. KOH at high temperature generated additional pore networks intercalation metallic K into matrix, leading to production mesopore micropore volumes...

In this paper, multiscale composites formed by grafting N-doped carbon nanotubes (CNs) on the surface of polyamide (PAN)-based activated fibers (ACFs) were investigated and their adsorption performance for CO₂ was determined. The spaghetti-like randomly oriented CNs homogeneously grown onto ACFs. pre-immersion cobalt(II) ions ACFs made grow above with a large pore size distribution, decreased oxidation resistance, exhibited different predominant N-functionalities after chemical vapor...

Surface characteristics of activated carbons can play critical roles on adsorption performance volatile organic compounds (VOCs). Attempts were made to correlate the specific physicochemical various with VOC adsorption. Eight commercial and ten species studied. Detailed properties carbon established in this study. Results indicate that both factor analysis correspondence provide satisfactory information relationship among surface carbon, properties, carbon. also suggest boiling point,...

Due to its special electronic and ballistic transport properties, graphene has attracted much interest from researchers. In this study, platinum (Pt) nanoparticles were deposited on oxidized sheets (cG). The applied overcome the corrosion problems of carbon black at operating conditions proton exchange membrane fuel cells. To enhance interfacial interactions between Pt nanoparticles, oxygen-containing functional groups introduced onto surface sheets. results showed uniformly dispersed with a...

Electrospinning techniques have become an efficient way to produce continuous and porous carbon nanofibers. In view of CO2 capture as one the important works for alleviating global warming, this study intended synthesize polyacrylonitrile (PAN)-based activated nanofibers (ACNFs) using electrospinning processes capture. Different structures PAN-based ACNFs were prepared, including solid, hollow, nanofibers, where poly(methyl methacrylate) (PMMA) was selected sacrificing core or pore...

In this study, polyacrylonitrile (PAN)-based activated nanofiber composites, which were embedded inside zeolitic imidazolate framework-8 (ZIF-8) crystals or ZIF-8-derived carbons (ZDC-850), fabricated using an electrospinning process, to serve as CO2 adsorbents. The adsorbents characterized various techniques. degree of crystallinity ZDC-850 totally changed compared that ZIF-8. For the timing ligand decomposition ZIF-8 significantly affected material properties. Zn metals in ZIF-8/PAN...

Emissions from motor vehicles have been one of the primary pollution sources in metropolitan areas throughout Taiwan for a long time. The government has devoted great deal effort to improving this situation. This study was conducted make survey air inside tunnels understand impact real roadway conditions April and May 1993 period January February 1994. Suspended particulate matter with aerodynamic diameters less than 10 um were collected on Teflon filters, which installed dichotomous...

We propose a classifier based on the support vector machine (SVM) for automatic classification in liver disease. The SVM, stemming from statistical learning theory, involves state-of-the-art learning. is part of computer-aided diagnosis (CADx), which assists radiologists accurately diagnosing formulate discriminating between cysts, hepatoma, cavernous hemangioma, and normal tissue as supervised problem, apply SVM to classifying diseases using gray level co-occurrence matrix features...

The nitrogen-doped carbon nanotubes (N-CNTs) were synthesized by chemical vapor deposition using ethanediamine as a precursor and ferrocene growth catalyst under the reaction temperatures of 800°C, 850°C, 900°C 950°C, respectively. doped nitrogen aggregated within bamboo joints CNTs, temperature influenced amount type into CNTs. best catalytic activity toward oxygen reduction (ORR) in an alkaline medium was obtained with N-CNTs prepared at 800°C due to largest being CNTs mainly form...