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Supapit Rawisod. Preparation of supercapacitor electrode from biogas wastewater via hydrothermal carbonization and impregnation. Master's Degree(Chemistry). Thammasat University. Thammasat University Library. : Thammasat University, 2024.
Preparation of supercapacitor electrode from biogas wastewater via hydrothermal carbonization and impregnation
การเตรียมตัวเก็บประจุยิ่งยวดจากน้ำเสียจากก๊าซชีวภาพโดยกระบวนการไฮโดรเทอร์มอลคาร์บอไนเซชันและวิธีเอิบชุ่ม
Name: Supapit Rawisod
keyword:
Supercapacitor
;
Melamine
Abstract:
Innovating technological solutions that utilize wastewater as precursors is essential for minimizing the environmental effects of wastewater discharge into natural ecosystems. Additionally, these solutions can promote value creation and creation and advance the principles of zero waste. Bioethanol wastewater is abundant in carbon elements, serves as a primary source for synthesizing solid-state carbon materials. This study focuses on synthesizing activated carbon (AC) from wastewater for use in supercapacitors. The wastewater underwent pretreatment to enhance its carbon content through evaporation. Subsequently, a hydrothermal carbonization reaction was employed to produce hydrochar, a solid-state carbon material. The surface area of the hydrochar was increased via a KOH chemical activation process with a ratio of 1:1.5. The resulting activated carbon (AC) was further functionalized with melamine (MM) and quinone loaded at percentages of 8%wt and 16%wt on the AC substrate. The AC and its composites underwent characterization using Field Emission Scanning Electron Microscopy (FE-SEM), Energy Dispersive X-ray Spectroscopy (EDS), BET Surface Area Analysis, X-ray Photoelectron Spectroscopy (XPS), and X-ray Diffraction (XRD). The electrochemical properties testing of AC composites demonstrates a promising specific capacity in both two and three-electrode systems. Specifically, AC exhibited specific capacity of 192.25 F.g-1 and 278.8 F.g-1 in the three and two-electrode systems, respectively. The nitrogen doped AC with MM with 16%wt, displayed the electric double layer capacitor (EDLC) behavior with the specific capacities of 200.46 F.g-1 and 164.2 F.g-1 in the three and two-electrode systems, respectively. Moreover, AC decorated with AQ and PQ with 16%wt using the wetness impregnation method exhibits the highest specific capacitance, showcasing pseudocapacitive (PC) behavior. AQ/AC-16-WN demonstrates specific capacities of 365.66 F.g-1 and 462.3 F.g-1 in the three- and two-electrode systems, respectively. Similarly, PQ/AC-16-WN exhibits specific capacities of 448.21 F.g-1 and 502.2 F.g-1 in the three- and two-electrode systems, respectively. Furthermore, the AC composites underwent duration of electricity supply tests using LED lights. The results indicate that PQ/AC-16-WN provides the longest lighting duration among the tested materials.
Thammasat University. Thammasat University Library
Address:
BANGKOK
Email:
preserv@tu.ac.th
Name: Suwadee Kongparakul
Role:
advisor
Created:
2024
Modified:
2568-05-13
Issued:
2025-04-08
วิทยานิพนธ์/Thesis
application/pdf
eng
DegreeName: Master of Science
Level: Master's Degree
Descipline: Chemistry
Grantor: Thammasat University
©copyrights Thammasat University
RightsAccess:
ใช้เวลา
0.025763 วินาที
Supapit Rawisod
| Title | Contributor | Type |
|---|
Suwadee Kongparakul