Cotton-based porous activated carbon with a large specific surface area as an electrode material for high-performance supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (79) ◽  
pp. 64704-64710 ◽  
Author(s):  
Guofu Ma ◽  
Dongyang Guo ◽  
Kanjun Sun ◽  
Hui Peng ◽  
Qian Yang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Source ◽  
Electrode Material ◽  
High Performance ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Large Specific Surface Area ◽  
Simple Chemical ◽  
Activating Agent ◽  
Porous Activated Carbon

Cotton-based porous activated carbons (CACs) are prepared through a simple chemical activation method using cotton fiber as carbon source and ZnCl2 as activating agent.

scholarly journals High Potential of Averrhoa bilimbi Leaf Waste as Porous Activated Carbon Source for Sustainable Electrode Material Supercapacitor

2021 ◽  
Vol 2049 (1) ◽  
pp. 012051
Author(s):  
E Taer ◽  
Nursyafni ◽  
Apriwandi ◽  
R Taslim
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
Carbon Source ◽  
Electrode Material ◽  
Activated Carbons ◽  
Sodium Hydroxide Solution ◽  
Chemical Activation ◽  
Constant Density ◽  
Adhesive Properties ◽  
Porous Activated Carbon

Abstract The energy cost-effective/free-environmental pollution concerns have an interest in bio-waste materials for the production of porous activated carbon, especially as electrode material for electrochemical energy storage devices such as li-ion batteries and supercapacitors. In this study, Averrhoa bilimbi leaf wastes were selected as a porous activated carbon source for sustainable electrode material supercapacitor. Porous activated carbons were prepared by chemical activation of 0.5 ml−1 sodium hydroxide solution at an optimum temperature of 800 °C pyrolyze in an environment of N2 and CO2 gases. The monolith coin shape of activated carbon is maintained by optimizing the self-adhesive properties of the precursor without the addition of adhesive materials. All coin monoliths feature a turbostratic to highly amorphous carbon structure. Furthermore, the relatively high monolith dimensional shrinkage of 42.00% initiated the development of a better pore framework carbon. In symmetric supercapacitors, electrochemical behavior confirmed a high specific capacitance of 149.04 F/g at a constant density of 1.0 A/g. Moreover, the maximum energy density was found of 10.50 Whkg−1 at an optimum power density of 116.35 W/kg in an aqueous electrolyte of 1 ml−1 Na2SO4. With bio-recycled waste, relatively easy preparation, and high electrochemical properties, porous activated carbon based on Averrhoa bilimbi leaf has great potential as a sustainable electrode material for supercapacitor energy storage applications.

scholarly journals Removal of Various Contaminants by Highly Porous Activated Carbon Sorbent Derived from Agricultural Waste Produced in Malaysia - A Review

2021 ◽  
Vol 20 (3) ◽  
Author(s):  
N.Z. Zabi ◽  
W.N. Wan Ibrahim ◽  
N.S. Mohammad Hanapi ◽  
N. Mat Hadzir
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Agricultural Waste ◽  
Chemical Activation ◽  
Carbon Sorbent ◽  
Wide Range ◽  
Different Types ◽  
Activating Agent ◽  
Highly Porous ◽  
Porous Activated Carbon

This paper aims to review recent studies in preparing activated carbons from different types of agricultural wastes in Malaysia and how it can help Malaysia manage agricultural waste. It can be seen that most biomasses can be used as precursors to produce activated carbon for a wide range of pollutants and this adsorbent can be modified to optimally function depending on the types of pollutants. Under optimum dosages, modification through chemical activation using acidic, basic, or drying agents has significant effects on the selectivity of the analyte adsorption. The acidic activating agent causes the activated carbon to have negatively charged acid groups which enable it to adsorb cationic adsorbate while the basic activating agent causes the adsorbent to have a positive surface charge and enable it to adsorb anionic adsorbate.

scholarly journals Optimization of the Activated Carbon Preparation from Avocado Seeds, using the Response Surface Methodology

2019 ◽  
Vol 70 (2) ◽  
pp. 410-416 ◽  
Author(s):  
Tagne Tiegam Rufis Fregue ◽  
Ioana Ionel ◽  
Anagho Solomon Gabche ◽  
Alin-Cristian Mihaiuti
Keyword(s):  
Response Surface Methodology ◽  
Activated Carbon ◽  
Response Surface ◽  
Calcination Temperature ◽  
Potassium Hydroxide ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Activating Agent ◽  
Electronic Microscope ◽  
Significant Factors

Avocado seeds based activated carbon was prepared using chemical activation method which consisted of potassium hydroxide treatment. The main factors influencing the preparation of activated carbons at the calcination temperature, the concentration of the activating agent and the duration of calcination were investigated. One used as a mathematical model the response surface methodology to correlate the response. The significant factors identified by the analysis of variance (ANOVA) through the t-test, the Pareto diagram and the diagrams of surfaces. The optimum avocado seeds based activated carbon was obtained by using calcination temperature of 450 oC, concentration of activating agent of 0.3 mol/L and time of calcination of 3.0 h, which resulted to an avocado seed based activated carbon iodine number remove of 1142.1 mg/g and yield of 75.09 %, by mass. The best activated carbon obtained under the previous conditions and the raw biomass was characterized by Fourier transform infrared and Scanning Electronic Microscope.

Nitrogen-enriched activated carbons from waste particleboard used as electrode materials for supercapacitors: effects of activating agent on surface characteristics

RSC Advances ◽  
2015 ◽  
Vol 5 (63) ◽  
pp. 50843-50850 ◽  
Author(s):  
T. X. Shang ◽  
J. Zhang ◽  
F. L. Fan ◽  
X. J. Jin
Keyword(s):  
Activated Carbon ◽  
Electrode Material ◽  
Electrode Materials ◽  
Activated Carbons ◽  
Rate Capability ◽  
Surface Characteristics ◽  
Carbon Electrodes ◽  
Promising Candidate ◽  
Activating Agent ◽  
Good Rate Capability

The nitrogen-enriched activated carbon electrodes prepared from waste particleboard exhibits high gravimetric specific capacitances, good rate capability, and excellent lone-term stability, making such electrode material a promising candidate for supercapacitors.

Sugar-derived disordered carbon nano-sheets as high-performance electrodes in sodium-ion batteries

2017 ◽  
Vol 41 (11) ◽  
pp. 4286-4290 ◽  
Author(s):  
Vadahanambi Sridhar ◽  
Hyun Park
Keyword(s):  
Activated Carbon ◽  
Carbon Source ◽  
Sulphuric Acid ◽  
Potassium Hydroxide ◽  
High Performance ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Disordered Carbon ◽  
Activating Agent ◽  
White Sugar

Inspired by the simple and spectacular experiment of dehydrogenation of sugar by sulphuric acid, we developed a microwave based solvothermal technique for the synthesis of activated carbon nano-sheets (aCNS) using white sugar as the carbon source and potassium hydroxide as the activating agent.

scholarly journals Porous Activated Carbon Binder-free Scleria sumatrensis Stem-Based for Supercapacitor Application

2021 ◽  
Vol 2049 (1) ◽  
pp. 012008
Author(s):  
Erman Taer ◽  
Muhammad Ali Akbar Tsalis ◽  
Apriwandi ◽  
Novi Yanti ◽  
Awitdrus ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Electrode Material ◽  
High Performance ◽  
Electrode System ◽  
Energy Storage Devices ◽  
Supercapacitor Application ◽  
Carbon Biomass ◽  
Symmetric Supercapacitor ◽  
Binder Free ◽  
Porous Activated Carbon

Abstract Green, sustainable and effective development technique to obtain high porous activated carbon biomass based is important to boosting supercapacitor performance with environmentally friendly effect as conversion system and energy storage devices. We reported porous activated carbon binder-free Scleria sumatrensis stem-based as electrode material high performance of symmetric supercapacitor. Precursor biomass of Scleria sumatrensis stem was converted into porous carbon through simple ZnCl2 impregnated with different concentration of 0.4M, 0.5M, 0.6M, and 0.7M at high-temperature phyrolysis. All samples confirmed good amorphous carbon with small amounts of oxidative compounds. In two-electrode system, the optimum sample of ACSS0.6 significantly boosting the specific capacitance as high as 142.62 F g−1 at scan rate of 1 mV s−1. Furthermore, the optimum energy density was found to be 19.80 Wh kg−1 at a maximum power density of 71.35 W kg−1 in 1 M H2SO4 aqueous electrolyte. These results confirm that the porous activated carbon binder-free Scleria sumatrensis stem-based through simple ZnCl2 impregnated as an electrode material to boosting the electrochemical behavior of supercapacitors.

Use of activated carbon to remove undesirable residual amylase from refinery streams

2017 ◽  
pp. 96-103 ◽  
Author(s):  
Gillian Eggleston ◽  
Isabel Lima ◽  
Emmanuel Sarir ◽  
Jack Thompson ◽  
John Zatlokovicz ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Temperature ◽  
High Performance ◽  
Activated Carbons ◽  
Amylase Activity ◽  
Sugar Industry ◽  
End User ◽  
Customer Complaints ◽  
Carry Over ◽  
Very High

In recent years, there has been increased world-wide concern over residual (carry-over) activity of mostly high temperature (HT) and very high temperature (VHT) stable amylases in white, refined sugars from refineries to various food and end-user industries. HT and VHT stable amylases were developed for much larger markets than the sugar industry with harsher processing conditions. There is an urgent need in the sugar industry to be able to remove or inactivate residual, active amylases either in factory or refinery streams or both. A survey of refineries that used amylase and had activated carbon systems for decolorizing, revealed they did not have any customer complaints for residual amylase. The use of high performance activated carbons to remove residual amylase activity was investigated using a Phadebas® method created for the sugar industry to measure residual amylase in syrups. Ability to remove residual amylase protein was dependent on the surface area of the powdered activated carbons as well as mixing (retention) time. The activated carbon also had the additional benefit of removing color and insoluble starch.

scholarly journals Computer Analysis of the Effect of Activation Temperature on the Microporous Structure Development of Activated Carbon Derived from Common Polypody

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2951
Author(s):  
Mirosław Kwiatkowski ◽  
Jarosław Serafin ◽  
Andy M. Booth ◽  
Beata Michalkiewicz
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Computer Analysis ◽  
Density Functional ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Geometrical Parameters ◽  
Activation Process ◽  
Microporous Structure ◽  
Activation Temperature

This paper presents the results of a computer analysis of the effect of activation process temperature on the development of the microporous structure of activated carbon derived from the leaves of common polypody (Polypodium vulgare) via chemical activation with phosphoric acid (H3PO4) at activation temperatures of 700, 800, and 900 °C. An unconventional approach to porous structure analysis, using the new numerical clustering-based adsorption analysis (LBET) method together with the implemented unique gas state equation, was used in this study. The LBET method is based on unique mathematical models that take into account, in addition to surface heterogeneity, the possibility of molecule clusters branching and the geometric and energy limitations of adsorbate cluster formation. It enabled us to determine a set of parameters comprehensively and reliably describing the porous structure of carbon material on the basis of the determined adsorption isotherm. Porous structure analyses using the LBET method were based on nitrogen (N2), carbon dioxide (CO2), and methane (CH4) adsorption isotherms determined for individual activated carbon. The analyses carried out showed the highest CO2 adsorption capacity for activated carbon obtained was at an activation temperature of 900 °C, a value only slightly higher than that obtained for activated carbon prepared at 700 °C, but the values of geometrical parameters determined for these activated carbons showed significant differences. The results of the analyses obtained with the LBET method were also compared with the results of iodine number analysis and the results obtained with the Brunauer–Emmett–Teller (BET), Dubinin–Radushkevich (DR), and quenched solid density functional theory (QSDFT) methods, demonstrating their complementarity.

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