Mesoporous activated carbon prepared from NaOH activation of rattan (Lacosperma secundiflorum) hydrochar for methylene blue removal

Islam, Md. Azharul; Ahmed, Muthanna J.; Khanday, Waheed Ahmad; Asif, Mohammad; Hameed, B.H.

doi:10.1016/j.ecoenv.2017.01.010

Cited by 301 publications

(99 citation statements)

References 43 publications

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“…Type IV isotherms are an indication of the existence of well-developed mesopores in the structure, whereas a type IV hysteresis loop indicates the formation of asymmetric, slit-shaped mesopores, attributable to rapid gas evolution and open channels [31]. It has been observed that increasing the ratio of activating agent to biochar increases the textural properties (surface area and pore volume) significantly, attributed to increasing the etching effect of the activating reagent on the biochar surface, thus creating mesopores from micropores [32]. The unique mesoporous structure of HAC contributes to the high specific surface area and uniform pore size distribution.…”

Section: Resultsmentioning

confidence: 99%

High-Surface-Area Mesoporous Activated Carbon from Hemp Bast Fiber Using Hydrothermal Processing

Hossain

et al. 2018

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Synthesis of activated carbon from waste biomass is of current interest towards sustainability. The properties of biomass-derived activated carbon largely depend on the carbonization process. This study reports the preparation of mesoporous activated carbon with extremely high surface area from hemp bast fiber using hydrothermal processing. Hot water processing (390-500 • C) followed by activation using KOH and NaOH was investigated at different mass ratios. The described approach was found to enhance the mesoporosity (centered at 3.0 to 4.5 nm) of the hemp-derived activated carbon (HAC) from activation [confirmed by BJH (Barrett-Joyner-Halenda) pore size distribution and TEM (transmission electron microscopy) imaging]. BET (Brunauer-Emmett-Teller) results showed that the product has an extremely high surface area (2425 m 2 /g) while the surface functional groups (-OH, -COOH, C=C/C-C) were confirmed by FTIR (Fourier transform infrared spectroscopy) and further quantified by XPS (X-ray photoelectron spectroscopy). Increasing KOH concentration was found to enhance the surface area with a maximum biochar-to-KOH (g/g) ratio of 1:3. The crystallite domain size of HAC was determined using Raman spectroscopy of different wavelengths. The procedure described in this study is an environmentally friendly scalable route for the mass production of activated carbon using hemp fiber.

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Section: Resultsmentioning

confidence: 99%

High-Surface-Area Mesoporous Activated Carbon from Hemp Bast Fiber Using Hydrothermal Processing

Hossain

et al. 2018

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“…It has been observed that increasing the ratio of activating agent to biochar increases the textural properties (surface area and pore volume) significantly, attributed to increasing the etching effect of the activating reagent on the biochar surface, thus creating mesopores from micropores [29]. The unique mesoporous structure of hemp based HAC contributes to the high specific surface area and uniform pore size distribution.…”

Section: Resultsmentioning

confidence: 98%

High Surface Area Mesoporous Activated Carbon from Hemp Bast Fibre Using Hydrothermal Processing

Hossain¹,

Wu²,

Xu³

et al. 2018

Preprint

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Synthesis of activated carbon from waste biomass is of current interest towards sustainability.The properties of biomass derived activated carbon largely depends on the carbonization process. This study reports preparing extremel high surface area mesoporous activated carbon from hemp bast fibre using hydrothermal processing. Processing in hot water (390-500 o C), then activation using KOH and NaOH was investigated at different loading ratios. The described approach was found to enhance the mesoporosity (centered at 3.0 to 4.5 nm) of the hemp derived activated carbon (HAC) from activation (confirmed by BJH pore size distribution and TEM imaging). BET results showed that the product has an extremely high surface area (2425 m 2 /g) while the surface functional groups (-OH, COOH, C=C/C-C) were confirmed and quantified by XPS and FTIR results. Increasing KOH concentration was found to enhance the surface area with an optimum biochar to KOH ratio of 1:3. The crystallite domain size of HAC was determined using Raman spectroscopy of different wavelengths. The procedure described in this study is an environmentally friendly scalable route for the mass production of activated carbon using hemp fiber.

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“…Considering the production process and costs, adsorption is considered to be a more convenient and efficient method than some of those treatment technologies mentioned above [9]. Islam et al [16] prepared a kind of mesoporous activated carbon to adsorb Methylene Blue (MB) dye. Islam et al [16] prepared a kind of mesoporous activated carbon to adsorb Methylene Blue (MB) dye.…”

Section: Introductionmentioning

confidence: 99%

Efficient adsorption of dyes from aqueous solution by poly(vinyl alcohol‐co‐ethylene) nanofibre membranes modified with β‐cyclodextrin

Wen

Fan

Zhu

et al. 2019

Coloration Technology

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In this paper, highly absorbent poly(vinyl alcohol-co-ethylene) nanofibre membranes modified by b-cyclodextrin were prepared to adsorb dyestuff from water, and 1,2,3,4-butanetetra carboxylic acid was used as a crosslinking agent, which greatly enhanced the adsorption capacity of the modified membranes. Field emission scanning electron microscopy and Fourier Transform-infrared spectroscopy were used to characterise the surface morphology and chemical structures of the membranes. Methylene Blue (MB) was used as the main adsorbed dye. The effect of pH value and concentration of the MB solution were also investigated, and equilibrium adsorption reached 139.2 mg/g when the pH value was 10.0. The adsorption process fitted well with the Langmuir adsorption isotherm model and was in accord with the pseudo-secondorder kinetic model. Moreover, the modified membranes proved to have selective adsorption, especially for some cationic dyes other than MB, and had the potential to be recycled multiple times.

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Mesoporous activated carbon prepared from NaOH activation of rattan (Lacosperma secundiflorum) hydrochar for methylene blue removal

Cited by 301 publications

References 43 publications

High-Surface-Area Mesoporous Activated Carbon from Hemp Bast Fiber Using Hydrothermal Processing

High-Surface-Area Mesoporous Activated Carbon from Hemp Bast Fiber Using Hydrothermal Processing

High Surface Area Mesoporous Activated Carbon from Hemp Bast Fibre Using Hydrothermal Processing

Efficient adsorption of dyes from aqueous solution by poly(vinyl alcohol‐co‐ethylene) nanofibre membranes modified with β‐cyclodextrin

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