Efficient removal of phosphate with La modified rGO/silica large-mesoporous films

Xuan Jing, Li Chen, Yaxin Wang, Yunyun Wang, Xinyan Yang, Jiangdong Dai, Xiaohui Dai, Yinhua Jiang, Yan Liu, Zhanchao Liu, Yongsheng Yan

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Efficient incorporation of large-mesoporous silica materials with the film structure to fabricate hybrid film materials has been promising for water treatment. The modified large-mesoporous silica films possessed superior adsorbability, but the poor mechanical behavior hampered the application of adsorbents. We proposed the fabrication of La modified rGO/silica mesoporous films for efficient phosphate removal to deal with this problem. Consider the problem of plugging of mesopores, La/Si molar ratio of 1/10 was a conventionally reported loading ratio in the literatures. In this paper, the film materials also retained pore size (19.97 nm) comparable with that of the pristine large-mesoporous silica films (20.53 nm) when the La/Si molar ratio was 1/5. In the adsorption experiments, the maximum phosphate capacities achieved 55.045 mg g−1. And multi-adsorption mechanisms were confirmed by the results of analysis. The formation of rod-like crystal LaPO4 was the main pathway in the adsorption process. The film material might create a new way for phosphate removal.

Original languageEnglish
Pages (from-to)170-180
Number of pages11
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume111
DOIs
StatePublished - Jun 2020
Externally publishedYes

Keywords

  • Lanthanum modification
  • Large-mesoporous silica film
  • Phosphate adsorption
  • rGO

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