Reaction Spinning Titanium Dioxide Particle-Coated Carbon Fiber for Photoelectric Energy Conversion

Yuan, Leonardo; Wei, Xupeng; Martinez, Jenny P.; Yu, Christina; Panahi, Niousha; Gan, Jeremy B.; Zhang, Yongping; Gan, Yong X.

doi:10.3390/fib7050049

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…In order to improve the adsorption efficiency of CMF, it is necessary to determine which physicochemical properties are the most important to achieve this goal, and how the heat treatments in the synthesis influence them. Usually, carbon fibers are synthesized by electrospinning because of its simplicity, low-cost, and industrially scalability [20][21][22][23][24]. The electrospinning process consists of the use of polymer solutions subjected to a high voltage difference to force the generation of polymer fibers [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Improve in CO2 and CH4 Adsorption Capacity on Carbon Microfibers Synthesized by Electrospinning of PAN

Ojeda-López

Esparza-Schulz

Pérez-Hermosillo

et al. 2019

Fibers

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Carbon microfibers (CMF) has been used as an adsorbent material for CO2 and CH4 capture. The gas adsorption capacity depends on the chemical and morphological structure of CMF. The CMF physicochemical properties change according to the applied stabilization and carbonization temperatures. With the aim of studying the effect of stabilization temperature on the structural properties of the carbon microfibers and their CO2 and CH4 adsorption capacity, four different stabilization temperatures (250, 270, 280, and 300 °C) were explored, maintaining a constant carbonization temperature (900 °C). In materials stabilized at 250 and 270 °C, the cyclization was incomplete, in that, the nitrile groups (triple-bond structure, e.g., C≡N) were not converted to a double-bond structure (e.g., C=N), to form a six-membered cyclic pyridine ring, as a consequence the material stabilized at 300 °C resulting in fragile microfibers; therefore, the most appropriate stabilization temperature was 280 °C. Finally, to corroborate that the specific surface area (microporosity) is not the determining factor that influences the adsorption capacity of the materials, carbonization of polyacrylonitrile microfibers (PANMFs) at five different temperatures (600, 700, 800, 900, and 1000 °C) is carried, maintaining a constant temperature of 280 °C for the stabilization process. As a result, the CMF chemical composition directly affects the CO2 and CH4 adsorption capacity, even more directly than the specific surface area. Thus, the chemical variety can be useful to develop carbon microfibers with a high adsorption capacity and selectivity in materials with a low specific surface area. The amount adsorbed at 25 °C and 1.0 bar oscillate between 2.0 and 2.9 mmol/g adsorbent for CO2 and between 0.8 and 2.0 mmol/g adsorbent for CH4, depending on the calcination treatment applicated; these values are comparable with other material adsorbents of greenhouse gases.

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Section: Introductionmentioning

confidence: 99%

Improve in CO2 and CH4 Adsorption Capacity on Carbon Microfibers Synthesized by Electrospinning of PAN

Ojeda-López

Esparza-Schulz

Pérez-Hermosillo

et al. 2019

Fibers

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“…Therefore, it is necessary to make very fine nanoparticles because the finer the nanoparticles, the bigger the interface area, the longer the scattering time in addition to a larger absolute value of E ν . By changing the diameters of the particles and the carbon nanofibers ranging from several nm to hundreds of nm using the approaches as previously shown in [79][80][81], the conductivity σ, the scattering time τ, and the ν-th energy level E ν was calculated and compared with experimental measurement results. Based on the comparative studies, necessary modification on the model were made.…”

Section: Thermoelectric Property Measurement and Transport Behavior C...mentioning

confidence: 99%

Advances in Manufacturing Composite Carbon Nanofiber-Based Aerogels

Gan

2020

J. Compos. Sci.

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This article provides an overview on manufacturing composite carbon nanofiber-based aerogels through freeze casting technology. As known, freeze casting is a relatively new manufacturing technique for generating highly porous structures. During the process, deep cooling is used first to rapidly solidify a well-dispersed slurry. Then, vacuum drying is conducted to sublimate the solvent. This allows the creation of highly porous materials. Although the freeze casting technique was initially developed for porous ceramics processing, it has found various applications, especially for making aerogels. Aerogels are highly porous materials with extremely high volume of free spaces, which contributes to the characteristics of high porosity, ultralight, large specific surface area, huge interface area, and in addition, super low thermal conductivity. Recently, carbon nanofiber aerogels have been studied to achieve exceptional properties of high stiffness, flame-retardant and thermal-insulating. The freeze casting technology has been reported for preparing carbon nanofiber composite aerogels for energy storage, energy conversion, water purification, catalysis, fire prevention etc. This review deals with freeze casting carbon nanofiber composite materials consisting of functional nanoparticles with exceptional properties. The content of this review article is organized as follows. The first part will introduce the general freeze casting manufacturing technology of aerogels with the emphasis on how to use the technology to make nanoparticle-containing composite carbon nanofiber aerogels. Then, modeling and characterization of the freeze cast particle-containing carbon nanofibers will be presented with an emphasis on modeling the thermal conductivity and electrical conductivity of the carbon nanofiber network aerogels. After that, the applications of the carbon nanofiber aerogels will be described. Examples of energy converters, supercapacitors, secondary battery electrodes, dye absorbents, sensors, and catalysts made from composite carbon nanofiber aerogels will be shown. Finally, the perspectives to future work will be presented.

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“…Hydrophobic oil is hard to attach to it, which hinders the adsorption of spilled oil onto the surface of TiO 2 nanostructures. To tackle these problems, a partially carbonized nanofiber was made as the continuous phase to hold TiO 2 nanoparticles using the reaction electrospinning technique, as shown in an earlier work [23]. TiO 2 nanoparticles are incorporated into spun nanofibers through in situ chemical reactions.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Photosensitive Composite Carbon Fiber for Spilled Oil Cleaning

Gan¹,

Arjan²,

Yik³

2022

J. Compos. Sci.

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This paper deals with preparing a functional composite carbon fiber with a large surface area for spilled oil cleaning. The composite fiber consisted of photosensitive oxide particles and polymer-derived carbon. It was made by co-spinning the polymer and metallic compounds. After heat treatment at high temperatures, an activated carbon fiber containing oxide particles was obtained. The particles were found distributed in the fiber and at the surface of the fiber. The composite fiber was found sensitive to sunlight. Fiber mats made of the composite fiber possessed a high surface area for oil absorption and removal. Cobalt(II) titanate particles were obtained from the reaction of titanium dioxide and cobalt oxide. The reaction happened in situ through the hydrolysis of metallic compounds in the spun fiber. The titanium dioxide and cobalt(II) titanate particle-containing fibers demonstrated the photoactivity in the visible light spectrum. It was concluded that particle-containing composite carbon fiber mats can be prepared successfully by co-electrospinning. Due to the oleophilic property and the high active surface area, the composites are suitable for spilled oil cleaning through fast absorption.

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Reaction Spinning Titanium Dioxide Particle-Coated Carbon Fiber for Photoelectric Energy Conversion

Cited by 6 publications

References 18 publications

Improve in CO2 and CH4 Adsorption Capacity on Carbon Microfibers Synthesized by Electrospinning of PAN

Improve in CO2 and CH4 Adsorption Capacity on Carbon Microfibers Synthesized by Electrospinning of PAN

Advances in Manufacturing Composite Carbon Nanofiber-Based Aerogels

Preparation of a Photosensitive Composite Carbon Fiber for Spilled Oil Cleaning

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