Correlation between adsorption and x-ray diffraction studies on viscose rayon based activated carbon cloth

Kumar, K. Vasanth; Saxena, R. K.; Kothari, Ravi; Suri, Dhavala; Kaushik, N. K.; Bohra, J.N.

doi:10.1016/s0008-6223(97)87258-2

Cited by 68 publications

(23 citation statements)

References 4 publications

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“…This turbostratic model assumes that the sample is made of graphite-like microcrystallites, bounded by cross linking network, consisting of several graphite-like layers, stacked nearly parallel and equidistant, with each layer having a random orientation. The value of 002 is comparable with those reported by Kumar et al on activated carbon cloth [27].…”

Section: Resultssupporting

confidence: 90%

Removal of Azo Dyes (Violet B and Violet 5R) from Aqueous Solution Using New Activated Carbon Developed from Orange Peel

Hashemian

Salari

Salehifar

et al. 2013

Journal of Chemistry

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Activated carbon developed from agricultural waste orange peel (COP) was prepared. COP was characterized using Fourier infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and BET. COP has surface area and mean pore diameter of 225.6 m2 g−1and 22.40 nm, respectively. The removal of violet B (VB) and violet 5R (V5R) from aqueous solutions by COP was investigated. The effect of operational parameters such as contact time, pH, initial dye concentration, and adsorbent dosage on the adsorption of dyes was investigated. Maximum dye was removed within 30 min of contact time at pH > 7. Two common models, the Langmuir and Freundlich isotherms, were used to investigate the interaction of dye and COPs. The isotherm evaluations revealed that the Langmuir model provides better fit to the experimental data than the Freundlich model. The adsorption of VB and V5R onto COP was followed by pseudo-second-order kinetic model with a good correlation (R2>0.99). Activation energies 5.47 and 29.7 KJ mol−1were determined for violet B and violet 5R, respectively. The rate of adsorption of violet 5R was faster than that of violet B (kV5R>kVB). The prepared COP could thus be used as promising adsorbent for removal of organic dyes, especially azo dye, from polluted water. The solid COP could be conveniently regenerated after adsorption.

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Section: Resultssupporting

confidence: 90%

Removal of Azo Dyes (Violet B and Violet 5R) from Aqueous Solution Using New Activated Carbon Developed from Orange Peel

Hashemian

Salari

Salehifar

et al. 2013

Journal of Chemistry

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“…The activated carbon derived from GSC exhibit the highest average crystallite thickness ( L c ), and the average number of graphitic layers ( N ), alongside low average graphene sheet diameter ( L a ). In addition, the low ratio of L c / L a predicts elevation in porosity, which was due to the effect of L c on the specific surface area in the inverse correlation of Kumar empirical formula ( S = 2/( ρL c )), where S is the predicted surface area and ρ is the graphite density 61 …”

Section: Resultsmentioning

confidence: 99%

“…In addition, the low ratio of L c /L a predicts elevation in porosity, which was due to the effect of L c on the specific surface area in the inverse correlation of Kumar empirical formula (S = 2/(ρL c )), where S is the predicted surface area and ρ is the graphite density. 61…”

Section: X-ray Diffractogrammentioning

confidence: 99%

Porous activated carbon monolith with nanosheet/nanofiber structure derived from the green stem of cassava for supercapacitor application

et al. 2020

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Carbonization and activation have been exploited as an economic and efficient approach toward the production of porous activated carbon monolith derived from green stem of cassava (GSC). In addition, ZnCl 2 was used as a chemical activator agent at various concentrations, therefore serving as a key factor in the development of porous carbon. The carbonization process (N 2) was integrated with physical activation (CO 2), and then N 2 sorption, scanning electron microscopy, X-ray diffraction, energy dispersive X-ray were examined to evaluate the specific surface area, pore structure characteristic, morphology structure, crystallinity, and the surface element, respectively. Furthermore, cyclic voltammetry was used to measure the electrochemical performance, through a two-electrode system in 1M H 2 SO 4. Therefore, the synthesized porous activated carbon exhibits a micropores-mesopores combination, and the optimized sample demonstrated nanosheet and nanofiber structures. The results show a high electrochemical behavior in 1M H 2 SO 4 electrolytes, by the electrodes, with specific capacitance, energy, and power densities of 164.58 F g −1 , 22.86 Wh kg −1 , and 82.38 W kg −1 , respectively. This route confirms the opportunity of using novel GSC in the production of porous carbon monolith with nanosheet/nanofiber structure for supercapacitor applications. K E Y W O R D S activated carbon, carbon porous, green stem of cassava, monolith, supercapacitor 1 | INTRODUCTION Green, renewable, and sustainable sources of energy systems are obtainable through the conversion of wind, water, and solar energy, 1 hence proper capture and storage is required for environmental friendly and economic application. 2 Meanwhile, supercapacitors possessing high power density, high charge-discharge rate, long cycle life, have the ability to store energy in the form of electric charges, 3 by providing a performance between capacitors and batteries. Conversely, the difference between both is that capacitors store and deliver energy incredibly quickly, while batteries have an ability to store high energy densities and also high voltages. 4 However, the main challenge of supercapacitor is related to the energy density entry through the narrow gap of batteries. Several electrode materials have been developed and suggested to improve energy density, power density, and cycle life of supercapacitor, 5 and three types were identified. These were then classified into carbonaceous

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“…Nilai La yang diperoleh pada elektroda SC lebih besar dari pada nilai La pada elektroda SA dan SB, sedangkan nilai Lc pada elektroda SC lebih kecil dari pada nilai Lc pada elektroda SA dan SB, ini menunjukkan bahwa Lc berbanding terbalik dengan La. Penurunan nilai Lc dipengaruhi oleh ukuran partikel yang digunakan, seiring meningkatnya ukuran partikel maka lebar timbunan mikrokristalin semakin besar sedangkan untuk tinggi timbunan mikrokristalin berkurang sehingga luas permukaan yang dihasilkan akan semakin besar hal ini didukung dengan teori yang menyatakan S= 2/ρLc artinya nilai Lc yang kecil menghasilkan luas permukaan yang besar [8].…”

Section: Tabel 1 Data Parameter Kisi Karbon Aktif Bunga Rumput Gajahunclassified

Pembuatan Dan Karakterisasi Sifat Fisis Elektroda Karbon Dari Bunga Rumput Gajah Ditinjau Dari Perbedaan Ukuran Partikel

Taer

Nurjanah

Sugianto

et al. 2016

Prosiding Seminar Nasional Fisika (E-Journal) Snf2016 Unj

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AbstrakPembuatan dan karakterisasi sifat fisis elektroda karbon dari bunga rumput gajah telah dianalisis dengan memvariasikan ukuran partikel. Pembuatan elektroda karbon dimulai dengan pra-karbonisasi, penggilingan dengan hard grinder, penggilingan dengan ball milling dan diikuti dengan proses pengayakan. Variasi ukuran partikel yang dipilih <38 µm dilanjutkan penggilingan selama 20 jam (SA), <38 µm (SB), dan 39-52 µm (SC). Semua sampel diaktivasi kimia dengan aktivator NaOH pada konsentrasi 0,4 M. Proses karbonisasi dilakukan pada suhu 600˚C dalam lingkungan gas N2 dan dilanjutkan dengan proses aktivasi fisika dengan menggunakan gas CO2 pada suhu 850˚C. Parameter fisis seperti massa, diameter dan ketebalan elektroda karbon aktif dikumpulkan pada suatu kondisi (i) sebelum karbonisasi, (ii) setelah karbonisasi dan (iii) setelah aktivasi fisika yang bertujuan untuk mendapatkan besaran densitas. Hasil data densitas masing-masing menunjukkan bahwa sampel SA (i) memiliki nilai densitas sebesar 1,103 g/cm 3 , (ii) 0,869 g/cm 3 , (iii) 0,800 g/cm 3 , SB (i) 1,083 g/cm 3 , (ii) 0,816 g/cm 3 , (iii) 0,728 g/cm 3 dan SC (i) 1,072 g/ cm 3 , (ii) 0,777 g/ cm 3 dan (iii) 0,599 g/cm 3 . Sehingga dapat disimpulkan, ukuran partikel berbanding terbalik dengan densitas. Sebagai tambahan, analisis kristalografi menunjukkan bahwa ukuran partikel berbanding terbalik dengan nilai Lc. Kata kunci : ukuran partikel, sifat fisis, karbon aktif, bunga rumput gajah AbstractPreparation and characterization of physical properties of carbon electrode from flower of elephant grass has been analyzed with variations in particle size. Production of carbon electrodes was begun with precarbonization, grinding with hard grinder, grinding with ball milling and followed by sieving process. Variations in particle size selected of <38 µm milling continued during 20 hours, <38 µm (SB), and 39-52 µm (SC). All of the sample have been activated by chemical activating agent with NaOH at a concentration of 0,4 M. Carbonization process was performed at temperatures of 600˚C in the gas environment N2 and followed by physical activation process by using a CO2 gas at a temperature of 850˚C. Physical parameters such as mass, diameter and thickness of activated carbon electrodes was collected at a condition (i) before carbonization, (ii) after carbonization and (iii) after physical activation to found the density characteristic. The results of density data showed that the sample SA of <38 µm has a density value of 1,103 g/ cm 3 , (ii) 0,869 g/cm 3 , (iii) 0,800 g/cm 3 , SB (i) 1,083 g/ cm 3 , (ii) 0,816 g/cm 3 , (iii) 0,728 g/cm 3 and SC (i) 1,072 g/ cm 3 , (ii) 0,777 g/ cm 3 and (iii) 0,599 g/ cm 3 , respectively. As a conclution, the particle size was varies inversely with the density. As an addition, the crystallographic analysis showed that the particle size is inversely proportional to the Lc value.

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Correlation between adsorption and x-ray diffraction studies on viscose rayon based activated carbon cloth

Cited by 68 publications

References 4 publications

Removal of Azo Dyes (Violet B and Violet 5R) from Aqueous Solution Using New Activated Carbon Developed from Orange Peel

Removal of Azo Dyes (Violet B and Violet 5R) from Aqueous Solution Using New Activated Carbon Developed from Orange Peel

Porous activated carbon monolith with nanosheet/nanofiber structure derived from the green stem of cassava for supercapacitor application

Pembuatan Dan Karakterisasi Sifat Fisis Elektroda Karbon Dari Bunga Rumput Gajah Ditinjau Dari Perbedaan Ukuran Partikel

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