Open AccessPreparation of MoS2 nano-corals by hydrothermal method for adsorption of tartrazine in the aqueous medium
Author(s) -
Hung Mac Van,
AnhTuan Vu
Publication year - 2020
Publication title -
xúc tác và hấp phụ
Language(s) - English
Resource type - Journals
ISSN - 0866-7411
DOI - 10.51316/jca.2020.076
Subject(s) - tartrazine , adsorption , aqueous solution , molybdenum disulfide , chemistry , diffusion , kinetics , chemical engineering , chromatography , inorganic chemistry , nuclear chemistry , organic chemistry , physics , quantum mechanics , engineering , thermodynamics
Corals-like molybdenum disulfide (MoS2) have been successfully synthesized via the hydrothermal method. The as-prepared MoS2 material with a high surface area of 83.9 m2.g-1 was used for the removal of tartrazine from an aqueous solution. The effects of parameters including contact time, MoS2 dosage, and solution pH on adsorption capacity were studied. The optimal dosage of MoS2 for removing tartrazine was 0.08 g and the removal efficiency of tartrazine reached 81.5 % for 100 min of adsorption. The adsorption kinetics studies were carried out using pseudo-first-order, pseudo-second-order, and intra-particle diffusion models. The results showed that the pseudo-second-kinetic model better described the adsorption kinetics of tartrazine on MoS2 and film diffusion was the rate-limiting step. In addition, the adsorption capacity of MoS2 was also performed with various organic dyes such as nile blue, janus green B, and congo red.