Fabrication of large-surface-area graphitized carbons by potassium hydroxide-promoted catalytic graphitization

Pan, Feng; Chen, Tao; Cai, Minjuan; Wu, Feng; You, Zhixiong; Li, Jinjun

doi:10.1016/j.materresbull.2021.111333

Cited by 18 publications

(4 citation statements)

References 34 publications

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“…The two peaks at 163.8 and 162.6 eV can be attributed to S 2− of MoS 2 ( Figure 2 e) [ 51 ]. The characteristic peaks of C=O, C-O, and C-C located at 289.7, 287.2, and 285.2 eV can be seen in the C 1s spectrum shown in Figure 2 f, which is consistent with the results for graphite [ 52 , 53 ].…”

Section: Resultssupporting

confidence: 88%

A 3D Multilevel Heterostructure Containing 2D Vertically Aligned MoS2 Nanosheets and 1D Sandwich C-MoS2-C Nanotubes to Enhance the Storage of Li+ Ions

Zhao

Luo

et al. 2023

Nanomaterials

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To overcome the disadvantages of the MoS2 anode for LIBs in terms of low intrinsic conductivity, poor mechanical stability, and adverse reaction with electrolytes, a 3D multilevel heterostructure (VANS-MoS2-CNTs) has been successfully prepared by a simple hydrothermal method followed by thermal treatment. VANS-MoS2-CNTs are made up of 2D vertically aligned MoS2 nanosheets (VANS) and 1D sandwich C-MoS2-C nanotubes (CNTs). The sandwich-like nanotube is the core part, which is made up of the MoS2 nanotube covered by carbon layers on both side surfaces. Due to the special heterostructure, VANS-MoS2-CNTs have good conductivity, high structured stability, and excellent Li+/electron transport, resulting in high discharge capacity (1587 mAh/g at a current density of 0.1 A/g), excellent rate capacity (1330 and 730 mAh/g at current densities of 0.1 and 2 A/g, respectively), and good cyclic stability (1270 mAh/g at 0.1 A/g after 100 cycles).

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Section: Resultssupporting

confidence: 88%

A 3D Multilevel Heterostructure Containing 2D Vertically Aligned MoS2 Nanosheets and 1D Sandwich C-MoS2-C Nanotubes to Enhance the Storage of Li+ Ions

Zhao

Luo

et al. 2023

Nanomaterials

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“…The polymer/DE-coated samples exhibit mass loss regions at 300–400 °C, which is related to the decomposition of the PDMS/DE layer [ 21 ]. The TGA curve of BCA performs the mass loss at a temperature range of approximately 400–750 °C, attributing to the oxidation reaction of carbon [ 58 , 59 ]. Moreover, the ACA shows the fastest mass loss rate at this phase, which can be assigned to the catalytic combustion of carbon materials by potassium salts [ 58 , 59 , 60 ].…”

Section: Resultsmentioning

confidence: 99%

“…The TGA curve of BCA performs the mass loss at a temperature range of approximately 400–750 °C, attributing to the oxidation reaction of carbon [ 58 , 59 ]. Moreover, the ACA shows the fastest mass loss rate at this phase, which can be assigned to the catalytic combustion of carbon materials by potassium salts [ 58 , 59 , 60 ]. The presence of potassium metals results in the deteriorated thermal stability of ACA [ 60 ].…”

Section: Resultsmentioning

confidence: 99%

Bio-Based Porous Aerogel with Bionic Structure and Hydrophobic Polymer Coating for Efficient Absorption of Oil/Organic Liquids

Huang

Hao

et al. 2022

Polymers

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Increasing contamination risk from oil/organic liquid leakage creates strong demand for the development of absorbents with excellent hydrophobicity and absorption capacity. Herein, bagasse was carbonized to form porous char with a special structure of array-style and vertically perforated channels, and then the activation process enlarged the pore volume of the char. With the cooperation of low-surface-energy polydimethylsiloxane and diatomaceous earth particles, the modified activated carbon aerogel (MACA) was fabricated by modifying the surface coating and mastoid structure on the bagasse char. Moreover, the MACA demonstrates high porosity oil-water separation, hydrophobicity, and considerable absorption capacity (4.06–12.31 g/g) for gasoline and various organic solvents. This work converts agricultural waste into an efficient porous adsorbent, offering a scalable and commercially feasible solution to solving the leakages of oil/organic solvents.

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“…Polimer bazlı küresel aktif karbonlar (PAK) şimdiye kadar esas olarak sorpsiyon proseslerinde kullanılmıştır [6][7][8][9]. Ayrıca nano karbon fiberler, farklı gözenek yapılarda PAK'lar ve karbon siyahlarının, katalitik ya da mikrodalga grafitizasyonu ve vakumlu indüksiyon fırınlarında grafitizasyon çalışmaları yapılmasına karşın [10][11][12][13][14], PAK'ın yüksek sıcaklık vakum fırınıyla grafitizasyon çalışması şu ana kadar bildirilmemiştir.…”

Section: Introductionunclassified

Synthesis of Spherical Structure Graphitic Carbon and Its Characterization

ATEŞ¹,

Tahtasakal²,

SEVGİLİ³

2023

JCHAR

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Sanayi tesisleri, araçlardaki egzoz emisyonu, temizlik malzemeleri gibi alanlardan kaynaklanan sıvı veya gaz, su, hava ve doğal ürünleri kirleten organik veya inorganik kirleticilerin giderilmesine yönelik adsorban geliştirme çalışmaları son yıllarda önemini sürdürerek devam etmektedir. Bu çalışmada, küresel polimerik aktif karbon (PAK) sentezi ve PAK'ın grafitizayonu ile elde edilen küresel grafitik karbon (GPAK) üretim çalışmaları yapılmıştır. Başlangıçta süspansiyon polimerizasyonu yöntemiyle polimerik kürecikler sentezlenmiş, sonra 700 °C'ye kadar karbonize edilmiş ve son olarak 830 °C'de su buharı ile aktive edilerek küresel PAK üretimi yapılmıştır. Bu yöntemle üretilen PAK'ın BET cihazı ile yüzey alanı ve ortalama gözenek çapı ölçüldüğünde sırasıyla 1929,6565 m 2 /g ve 34,054 Å olduğu tespit edilmiştir. PAK'ın SEM ve RAMAN spektroskopisi ile analizleri yapılmıştır. Tüm bu karakterizasyon çalışmaları sonucunda, PAK'ın küresel yapılı ve homojen mikromezo gözenek dağılımına sahip olduğu tespit edilmiştir. PAK'tan 1750°C'de 6 saatte ve 10 L/dk Argon akış hızında, inert atmosferik basınç ve inert 20 mbar vakum altında grafitizasyon çalışmaları yapılmıştır. Buna göre vakum altında üretilen GPAK2'nin yüzey alanının (1237,2094 m 2 /g), atmosferik ortamda yapılan GPAK1'in yüzey alanına (1787,1851 m 2 /g) göre daha düşük olduğu görülmüştür. 1750 °C'de inert 20 mbar vakum atmosferinde ve 6 saat grafitizasyon süresinin 10 saate çıkarılması ile beraber yüzey alanının 1231,2380 m 2 /g'a düştüğü tespit edilmiştir. Ayrıca aynı ürünlerin SEM ve Raman karakterizasyon sonuçlarına göre de GPAK3 ürününün morfolojik olarak homojen dağılıma sahip olduğu ve G bandı genişliği ve yüksekliğine göre daha yüksek grafitizasyona uğradığı tespit edilmiştir.

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Fabrication of large-surface-area graphitized carbons by potassium hydroxide-promoted catalytic graphitization

Cited by 18 publications

References 34 publications

A 3D Multilevel Heterostructure Containing 2D Vertically Aligned MoS2 Nanosheets and 1D Sandwich C-MoS2-C Nanotubes to Enhance the Storage of Li+ Ions

A 3D Multilevel Heterostructure Containing 2D Vertically Aligned MoS2 Nanosheets and 1D Sandwich C-MoS2-C Nanotubes to Enhance the Storage of Li+ Ions

Bio-Based Porous Aerogel with Bionic Structure and Hydrophobic Polymer Coating for Efficient Absorption of Oil/Organic Liquids

Synthesis of Spherical Structure Graphitic Carbon and Its Characterization

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