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Investigation on into the adsorption of Cu(II), Pb(II) and Cr(VI) on hollow mesoporous silica using microcalorimetry

  • Jiao Wang
  • Weiwei Zhao
  • Zongxiao LiEmail author
  • Kaining Ding
  • Zhejunyu Jin
Article
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Abstract

Hollow mesoporous silica (SiO2) was synthesized by the modified self-template method, and the morphology and structural properties of mesoporous silica were characterized by XRD, SEM, TEM, BET. Microcalorimetry was employed to investigate the adsorption behavior of Cu(II), Pb(II) and Cr(VI) from aqueous solution. The results showed that ΔH and ΔS were both less than zero (ΔH < 0, ΔS < 0) during the adsorption process, and van der Waals forces were the driving force for adsorption. The adsorption curves of Cu(II) and Pb(II) by HMSS accord with the Langmuir adsorption isotherm, and the adsorption curve of HMSS to Cr(VI) accords with the Freundlich adsorption isotherm. Monte Carlo simulation showed that Cu(II), Pb(II), Cr(VI) were adsorbed on the surface of this nanomaterial and in the interstitial positions between the atoms. The adsorption energy of molecular simulation is consistent with the experimental results.

Keywords

Hollow mesoporous silica Adsorption Microcalorimetry Monte Carlo simulation 

Notes

Acknowledgements

Financial support from Natural Science Foundation of National Natural Science Foundation of China (51702006), Shaanxi provincial science and technology planning project (2018JQ2056), Shaanxi Education Department Project (17JS009) and Association for Science and Technology Youth Talent Lift Project in Shaanxi Province Colleges and Universities (20170707) is gratefully acknowledged. Financial support from Shaanxi Education Department Project (17JS009) is gratefully acknowledged.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Jiao Wang
    • 1
  • Weiwei Zhao
    • 1
  • Zongxiao Li
    • 1
    • 2
    Email author
  • Kaining Ding
    • 3
  • Zhejunyu Jin
    • 1
  1. 1.College of Chemistry and Chemical EngineeringBaoji University of Arts and SciencesBaojiChina
  2. 2.Xi’an Traffic Engineering InstituteXi’anChina
  3. 3.Department of Chemistry, Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and EnvironmentFuzhou UniversityFuzhouChina

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