Green synthesis of ultrapure La(OH)3 nanoparticles by one-step method through spark ablation and electrospinning and its application to phosphate removal

Shiyang Li, Xiangfeng Huang*, Zhengyu Wan, Jia Liu, Lijun Lu, Kaiming Peng, Andreas Schmidt-Ott, Rabin Bhattarai

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)


La(OH)3 metal engineered nanoparticles (MENPs) are efficient phosphate binders; however, complex synthesis procedures and purity as well as agglomeration issues impede their development and practical applications. Herein, a green and a one-step method in combination with the spark ablation aerosol technology and electrospinning is proposed for the synthesis of La(OH)3 MENPs; further, their application as phosphate binders are elucidated as a proof the concept. Material characterization results confirm the successful synthesis of ultrapure La(OH)3 MENPs, which has not been achieved before via an environmentally friendly one-step procedure. Small angle X-ray scattering and X-ray photoelectron spectroscopy etching results show that La(OH)3 MENPs loading on the electrospun nanofibers are uniform in both two and three dimensions. The comparative tests revealed a high phosphate adsorption capacity (110.8 mg P/g La) and indicted that the La(OH)3 MENPs perform well; this was observed even under the interference of coexisting ions (Cl, SO4 2−, NO3 , and F) at different pH values. After three cycles of solution-shaking treatment, the release of La(OH)3 was less than 1 wt% (0.5 wt%), which was acceptable for an adsorbent. These results indicate that the La(OH)3 MENP-loaded nanofibers are practical phosphate binders due to the simple production methods, low manufacturing cost, and impressive capacity. The proposed method significantly shortens the loading process and is a promising alternative for not only the synthesis of the adsorbent, but also for other engineering materials where loading is needed.

Original languageEnglish
Article number124373
JournalChemical Engineering Journal
Publication statusPublished - 2020


  • Controllable particle sizes
  • Eutrophication
  • Gas-phase coalescence
  • Industrialization potential
  • La(OH) nanoparticles
  • Phosphorus removal


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