Synthesis of multi-application activated carbon from oak seeds by KOH activation for methylene blue adsorption and electrochemical supercapacitor electrode

Arabian Journal of Chemistry

卷:14

Mahdi Ghadiri¹  Saeed Shirazian²  Azam Marjani³  Seyed Abbas Borghei⁴  Mojtaba Ahmadi⁴  Masoud Habibi Zare⁵  Mohammad Hasan Sadeghi⁵ 

[1] Corresponding author at: Ton Duc Thang University, Ho Chi Minh City, Viet Nam.;

[2] Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;

[3] Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;

[4] Department of Chemical Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran;

[5] Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran;

关键词: Activated carbon;    Adsorbent;    Supercapacitor;    Methylene blue;   

DOI  :  

来源: DOAJ

【 摘 要 】

In the current study, an oak as a non-expensive, renewable, and a biomass resource was used to generate a nano-porous activated carbon applicable in methylene blue adsorption from wastewater and energy storage equipment. Furnace activation in the temperature range of 450, 550, 650 and 750 °C was used for activated carbon synthesis after infusion with potassium hydroxide. The synthesized activated carbon was characterized using different techniques including nitrogen adsorption/desorption, scanning electron microscopy, and fourier-transform infrared spectroscopy. The results showed that temperature has significant effect on activated carbon efficiency. Specific surface and pore volumes increased with the enhancement of temperature until 650 °C, but then it was decreased. Pores volume was consisting of mesoporous and microporous structure. The highest surface area (2896 m2/g) and pores volume (1.554 cm3/g) was obtained for the sample prepared at 650 °C. Freundlich isotherm model is appropriate for methylene blue adsorption isotherm by the synthesized activated carbon. The maximum adsorption capacity of MB was obtained as 24 mg/g. Moreover, the synthesized activated carbon exhibited the highest specific capacitance when it was used as electrode (551 F/g at current density of 1 A/g) in 1 M sulphuric acid electrolyte and 96% specific capacitance was remained after 5000 charge-discharge cycles at a current density of 10 A/g.

【 授权许可】

Unknown