Hydrothermal synthesis of a graphene/magnetite/montmorillonite nanocomposite and its ultrasonically assisted methylene blue adsorption

  • Bo Zhang
  • Tailiang ZhangEmail author
  • Zhidong Zhang
  • Mingyuan Xie
Chemical routes to materials


A graphene/magnetite/montmorillonite nanocomposite (GQDs/Fe3O4/MMT) was synthesized via a simple green hydrothermal method. The effects of pH, temperature, contact time, adsorbent quality, dye concentration and ultrasonication on the adsorption performance of methylene blue (MB) were investigated. For ultrasonic-assisted adsorption, the adsorption rate of GQDs/Fe3O4/MMT can reach 10 s. Ultrasound strongly affected the adsorption equilibrium time but did not affect the maximum adsorption capacity. The main reason for ultrasonic-assisted dyes ultrafast adsorption is cavitation that graphene quantum dots (GQDs) promote nucleation. By adjusting the amount of surface charge, the adsorbent has excellent selective ultrasonic-assisted ultrafast adsorption properties of mixed dyes. The adsorption performance of the GQDs/Fe3O4/MMT was weakly affected by temperature. The theoretical and experimental maximum adsorption capacities were 429.4 mg/g and 225.0 mg/g, respectively. The adsorption kinetics and adsorption isotherms agree well with the pseudo-second-order equation and the Langmuir equation, respectively. After six adsorption/desorption cycles, the adsorption and desorption efficiency of the dye decreased slightly. The results indicated that the GQDs/Fe3O4/MMT nanosorbent has strong potential for removing the cationic dye MB from wastewater.



The research was supported by the Southwest Petroleum University in China.

Supplementary material

10853_2019_3659_MOESM1_ESM.doc (1.1 mb)
Supplementary material 1 (DOC 1163 kb)


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Chemistry and Chemical EngineeringSouthwest Petroleum UniversityChengduPeople’s Republic of China
  2. 2.Safety Environment Quality Supervision and Testing Research InstituteCNPC Chuanqing Drilling Engineering Co., LtdGuanghanPeople’s Republic of China

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