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An Investigation on Renewable Carbons as Natural Sources of Fluorescent and Conductive Materials for Smart Device Applications.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	An Investigation on Renewable Carbons as Natural Sources of Fluorescent and Conductive Materials for Smart Device Applications./
作者:	Semeniuk, Maria Natalia.
面頁冊數:	1 online resource (162 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
Contained By:	Dissertations Abstracts International85-01B.
標題:	Nanoscience. -
電子資源:	click for full text (PQDT)
ISBN:	9798379771829

An Investigation on Renewable Carbons as Natural Sources of Fluorescent and Conductive Materials for Smart Device Applications.
Semeniuk, Maria Natalia.

An Investigation on Renewable Carbons as Natural Sources of Fluorescent and Conductive Materials for Smart Device Applications. - 1 online resource (162 pages)

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

Thesis (Ph.D.)--University of Toronto (Canada), 2023.

Includes bibliographical references

Controlled carbonization of biomass leads to nano-layered graphitic structures with characteristic crystalline sp2 hybridization with conductive and optical properties. The starting material and processing parameters influence the final chemical and morphological structure of the renewable carbon, which determine its practical applications. Biomasses investigated include various wood, xylem sap and peanut shells. Controlled pyrolysis of several wood species to 800 ˚C yielded photoluminescent graphene clusters with a notable electrical conductivity of 600 S/m and electromagnetic interference shielding effectiveness of 47.7 dB at 12 GHz. This is due to the renewable graphitic carbon's material graphene-graphite composite, since graphene is known to be highly conductive due to its high carrier mobility. Catalytic graphitization with iron nitrate nanoparticles successfully showed the formation of single crystal graphitic carbon structures in black spruce (Picea mariana) at temperatures between 300-800 ˚C and conductivity of 850 S/m. This P. mariana renewable carbon was applied as the cathode of a coin cell battery. To reduce processing temperature further, hydrothermal pyrolysis was performed at 180 ˚C on xylem sap. A characteristic crystalline sp2 carbon was observed in hydrochar xylem syrup. When UV light is shone on the carbon, by the "naked eye" it can selectively detect Fe3+ ions and pH. A chemo sensor was designed based on logic gates, which can displace traditional metal-oxide-semiconductor field-effect transistor (MOSFET) based circuits. Additionally, multiple thermogravimetric comparisons were performed using several model-free and model-based kinetic analyses, where activation energy and pre-exponential factors were determined during the decomposition process. Peanut shell graphitic carbon was applied as an electrode in a Li-ion coin cell battery, yielding a specific capacity of 220 mAh/g and 100 % columbic efficiency for 800 cycles. Thus, these findings on renewable carbon will open a new frontier in sustainable bio-electronics and energy materials manufacturing.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798379771829Subjects--Topical Terms:

632473
Nanoscience.
Subjects--Index Terms:

Graphitic structuresIndex Terms--Genre/Form:

554714
Electronic books.

An Investigation on Renewable Carbons as Natural Sources of Fluorescent and Conductive Materials for Smart Device Applications.
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520 $a Controlled carbonization of biomass leads to nano-layered graphitic structures with characteristic crystalline sp2 hybridization with conductive and optical properties. The starting material and processing parameters influence the final chemical and morphological structure of the renewable carbon, which determine its practical applications. Biomasses investigated include various wood, xylem sap and peanut shells. Controlled pyrolysis of several wood species to 800 ˚C yielded photoluminescent graphene clusters with a notable electrical conductivity of 600 S/m and electromagnetic interference shielding effectiveness of 47.7 dB at 12 GHz. This is due to the renewable graphitic carbon's material graphene-graphite composite, since graphene is known to be highly conductive due to its high carrier mobility. Catalytic graphitization with iron nitrate nanoparticles successfully showed the formation of single crystal graphitic carbon structures in black spruce (Picea mariana) at temperatures between 300-800 ˚C and conductivity of 850 S/m. This P. mariana renewable carbon was applied as the cathode of a coin cell battery. To reduce processing temperature further, hydrothermal pyrolysis was performed at 180 ˚C on xylem sap. A characteristic crystalline sp2 carbon was observed in hydrochar xylem syrup. When UV light is shone on the carbon, by the "naked eye" it can selectively detect Fe3+ ions and pH. A chemo sensor was designed based on logic gates, which can displace traditional metal-oxide-semiconductor field-effect transistor (MOSFET) based circuits. Additionally, multiple thermogravimetric comparisons were performed using several model-free and model-based kinetic analyses, where activation energy and pre-exponential factors were determined during the decomposition process. Peanut shell graphitic carbon was applied as an electrode in a Li-ion coin cell battery, yielding a specific capacity of 220 mAh/g and 100 % columbic efficiency for 800 cycles. Thus, these findings on renewable carbon will open a new frontier in sustainable bio-electronics and energy materials manufacturing.
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