High yield activated carbon from corn husk-sucrose prepared by chemical and physicochemical activation processes: Adsorption study of methylene blue dye

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-03-21 DOI:10.1016/j.molliq.2025.127435

Aline A.R. Andrade , Marcela C. Silva , Lucas H.S. Crespo , Tais L. Silva , André L. Cazetta , Lucas Spessato , Vitor C. Almeida

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引用次数: 0

Abstract

Activated carbons (ACs) are porous material used in adsorption processes and can be prepared from the several renewable sources. The mass yield values of ACs consist of an important parameter for their applicability and which is often neglected in the works. In this study, ACs with high yield were prepared from the mixture of renewable sources, corn husk and sucrose, as carbon precursor, using the physicochemical (H₂SO₄ and CO₂) and chemical (H₂SO₄) activation methods. ACs were prepared from a mixture of corn husk and sucrose in ratio 1:1 (m:m) and characterized from the various analysis techniques and methodologies. The results showed that AC prepared in the ratio of 1:1 (corn husk:sucrose, m:m) and chemical activation (AC_1:1-C) presented the highest yield and highest index S_BET and yield (I_SBET-Y = 18,864). This I_SBET-Y was firstly proposed herein. Additionally, the ACs prepared with sucrose showed characteristics of higher thermal stability and surface chemical characteristics close to the neutrality (pH ≈ 7.0). AC_1:1-C was applied in the adsorption study of methylene blue (MB) dye showing the monolayer adsorption maximum capacity of 199.4 mg g⁻¹, and adsorption process considered exothermic, spontaneous and governed mainly by physisorption. The results showed the possibility to increase the yield of ACs from the use the mixture of precursor containing sucrose, and which presented high adsorption capacity to MB dye.

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.