Grafitik karbon nitrür ve bor nitrür içeren kompozit yapıların hazırlanması; çevre ve enerji uygulamaları
Yükleniyor...
Dosyalar
Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Yarı iletken nanokompozit malzemeler son yıllarda çevresel iyile?tirme ve enerji uygulamaları için yoğun ilgi görmektedir. Bu tez çalı?ması kapsamında nanamalzeme katkılı membranlar ve süperkapasitörler üretilmi?tir. Yüksek termal stabilitesi ve iyi dağılabilirlik, kimyasal kararlılık, elektriksel yalıtım özellikleri ve toksik olmamaları sebebiyle grafitik karbon nitrür (g-C3N4) ve bor nitrür kuantum noktalar (BNKN) bu uygulamalarda nanokompozit malzemelerin esas bile?enleri olarak kullanılmı?tır. g-C3N4 ve BNKN üretimi sırasıyla sinterleme ve hidrotermal i?lem ile gerçekle?tirilmi?tir. Nanomalzemelerin çevresel uygulamalarında, ağırlıkça % 0.5, % 1.0 ve % 2.0 g-C3N4 veya BNKN içeren polietersülfon (PES) membranlar (gC3N4@PES, BNKN@PES) bir döküm ünitesinde üretilmi?tir. Membranların saf su akı geçirgenlik performansı ile birlikte membran tıkanıklığını önleme ve kirlilik çalı?maları da ara?tırılmı?tır. Hibrit membranların, saf PES membrandan daha iyi temizleme özelliği sergilediği görülmü?tür. Enerji uygulamalarında kullanılmak üzere, g-C3N4 veya BNKN içeren grafen elektrotlar hazırlanmı?tır. Bu kapsamda, farklı miktarlarda alınan g-C3N4 veya BNKN (15 mg / 30 mg / 60 mg), indirgenmi? grafen oksit (rGO) (30 mg) ile hidrotermal i?leme tabii tutularak, süperkapasitör uygulamalarında kullanılabilecek elektrotlar (gC3N4@rGOH ve BNKN@rGOH) hazırlanmı? ve uygun tekniklerle (XRD, SEM, CV, BET, ZETA) karakterize edilmi?tir. Bu hibrit yapılardan üretilen elektrotların spesifik kapasitans değerleri, empedans eğrileri ve ?arj/de?arj performansları elektrokimyasal teknikler ile analiz edilmi?tir. g-C3N4@rGOH (30 mg/15 mg oranlarında) hazırlanan elektrotun 157.4 F g -1 spesifik kapasitans değeri ile en yüksek performansa sahip olduğu bulunmu?tur. E?it oranlarda hazırlanan BNKN@rGOH (30 mg/30 mg oranlarında) ii hibrit yapısından ise 207.25 F g-1 spesifik kapasitans değeri ile en yüksek performansa sahip olduğu bulunmu?tur. Bu tez çalı?masından elde edilen sonuçlara göre; üretilen hibrit yapıların, çevre ve enerji uygulamalarında gelecek vaad ettiği görülmektedir.
Semiconductor nanocomposite materials have attracted intense interest for environmental remediation and energy applications in recent years. In this thesis, nanomaterial doped membranes and supercapacitors were produced. Graphitic carbon nitride (g-C3N4) and boron nitride quantum dots (BNKN) have been used as the main components of nanocomposite materials in these applications due to their high thermal stability and good dispersibility, chemical stability, electrical insulating properties and non-toxicity. The production of g-C3N4 and BNKN was carried out by heating process and hydrothermal treatment, respectively. In environmental applications of nanomaterials, polyethersulfone (PES) membranes (g-C3N4 @PES, BNKN@PES) containing 0.5 %, 1.0 % and 2.0 % by weight g-C3N4 or BNKN were produced in a casting unit. Along with the pure water flux permeability performance of the membranes, membrane fouling prevention and pollution studies were also investigated. It has been observed that hybrid membranes to display better cleaning properties than pure PES membranes. Graphene-based electrodes containing g-C3N4 or BNKN have been prepared for use in energy applications. In this context, electrodes (g-C3N4@rGOH ve BNKN@rGOH) that can be used in supercapacitor applications were prepared by hydrothermal treatment with reduced graphene oxide (rGO) (30 mg) of g-C3N4 or BNKN (15 mg / 30 mg / 60 mg), taken in different amounts, and with appropriate techniques (XRD, SEM, CV. BET, ZETA) were characterized. The specific capacitance values, impedance curves and charge/discharge performances of the electrodes produced from these hybrid structures were analyzed by electrochemical techniques. It was found that the electrode prepared g-C3N4@rGOH (at the ratio of 30 mg/15 mg) had iv the highest performance with a specific capacitance value of 157.4 F g-1. It was found that the hybrid structure of BNKN@rGOH (at the ratio of 30 mg/30 mg), prepared in equal proportions, had the highest performance with a specific capacitance value of 207.25 F g-1 . According to the results obtained from this thesis study; It is seen that the hybrid structures produced are promising in environmental and energy applications.
Semiconductor nanocomposite materials have attracted intense interest for environmental remediation and energy applications in recent years. In this thesis, nanomaterial doped membranes and supercapacitors were produced. Graphitic carbon nitride (g-C3N4) and boron nitride quantum dots (BNKN) have been used as the main components of nanocomposite materials in these applications due to their high thermal stability and good dispersibility, chemical stability, electrical insulating properties and non-toxicity. The production of g-C3N4 and BNKN was carried out by heating process and hydrothermal treatment, respectively. In environmental applications of nanomaterials, polyethersulfone (PES) membranes (g-C3N4 @PES, BNKN@PES) containing 0.5 %, 1.0 % and 2.0 % by weight g-C3N4 or BNKN were produced in a casting unit. Along with the pure water flux permeability performance of the membranes, membrane fouling prevention and pollution studies were also investigated. It has been observed that hybrid membranes to display better cleaning properties than pure PES membranes. Graphene-based electrodes containing g-C3N4 or BNKN have been prepared for use in energy applications. In this context, electrodes (g-C3N4@rGOH ve BNKN@rGOH) that can be used in supercapacitor applications were prepared by hydrothermal treatment with reduced graphene oxide (rGO) (30 mg) of g-C3N4 or BNKN (15 mg / 30 mg / 60 mg), taken in different amounts, and with appropriate techniques (XRD, SEM, CV. BET, ZETA) were characterized. The specific capacitance values, impedance curves and charge/discharge performances of the electrodes produced from these hybrid structures were analyzed by electrochemical techniques. It was found that the electrode prepared g-C3N4@rGOH (at the ratio of 30 mg/15 mg) had iv the highest performance with a specific capacitance value of 157.4 F g-1. It was found that the hybrid structure of BNKN@rGOH (at the ratio of 30 mg/30 mg), prepared in equal proportions, had the highest performance with a specific capacitance value of 207.25 F g-1 . According to the results obtained from this thesis study; It is seen that the hybrid structures produced are promising in environmental and energy applications.
Açıklama
Anahtar Kelimeler
Nanokompozit Malzemeler, Nanomalzeme Katkılı Membran Sentezi, Atık Su Arıtımı, Enerji Depolama, Süperkapasitör, Nanocomposite Materials, Nanomaterial Doped Membrane Synthesis, Waste Water Treatment, Energy Storage, Supercapacitor
