Efficient adsorption and removal mechanism of 2,4-dichlorophenol by MoS2@C6H12O6 floral activated carbon with intercalated structure

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2024-01, Vol.299, p.116807, Article 116807
• Main Authors: Li, Zhaoyang, Mao, Yanli, Liu, Zuwen, Song, Zhongxian, Qu, Songzhao, Wang, Zhaodong, Kang, Haiyan, Yan, Xu, Gu, Deming, Yan, Xiaole, Huang, Zhenzhen
• Format: Article
• Language: English
• Subjects: Composite Biochar; Flower-like particles; Intercalation structure; Multi-location; Recyclable adsorbent
• ISSN: 0921-5107; 1873-4944
• DOI: 10.1016/j.mseb.2023.116807

Glucose was used as the carbon source, ammonium molybdate and thiourea were usde as the precursors of MoS2 nanosheets, and urea was usde as the nitrogen source. Sulfur and nitrogen doped particles with flower-like surfaces were produced by hydrothermal reaction. In the oxygen-limited carbonisation stage, the MOS2-carbon layer was activated by KOH. Flower-like sulphur and nitrogen doped biomass carbon was obtained. [Display omitted] •Flower-like adsorbents with MoS2-C-MoS2 nanosheet was prepared.•The adsorbent exhibited an excellent adsorption performance of 354 mg·g−1.•Adsorption was a spontaneous exothermic process.•Adsorbent maintained more than 80% of the effective active sites after five cycles. Activated carbon particles are obtained through hydrotherm, alkali activation, and oxygen-limited carbonization stages. Flower-like carbon spheres with MoS2-C-MoS2 intercalation structure are prepared using glucose as the carbon source and molybdenum disulfide as the substrate. Carbon spheres activated by different masses of the alkali exhibit excellent adsorption properties. The adsorption behavior of the carbon spheres is fitted to the Langmuir and pseudo-second-order kinetic models, and the adsorption process is monolayer chemisorption. Hydrothermal carbon: KOH (m:m) = 1:1, solution pH = 7, T = 25 °C, and a dosage of 0.03 g are the optimum conditions. The adsorption capacity of the adsorbent for 2,4-dichlorophenol is 354.5 mg·g−1. Thermodynamic experiments show that the adsorption behavior can proceed spontaneously. Moreover, after six cycles of adsorption, 80% of the sulfur and nitrogen groups in the carbon layer remained effective. FTIR, XPS and XRD analyses show the presence of hydrogen bonding, π-π bonding, and electrostatic forces on 2,4- dichlorophenol by the adsorbent.