Scholarlink

<p>The separation of the isotopologues of water is critically important for purification and practical applications; however, effective separation methods for this purpose are currently lacking. The similar physical and chemical properties of deuterium oxide (D<sub>2</sub>O) and water (H<sub>2</sub>O) cause challenges to existing techniques, which are both complex and energy-intensive, especially for large-scale separation of D<sub>2</sub>O from H<sub>2</sub>O/D<sub>2</sub>O mixtures. Herein, we discovered that D<sub>2</sub>O can be removed from H<sub>2</sub>O/D<sub>2</sub>O mixture through a three-phase interface in sessile microdroplets. This process converts D<sub>2</sub>O/H<sub>2</sub>O mixed microdroplets, ranging from 0.5 to 1.5 µL with D<sub>2</sub>O concentrations from 3% to 90%, into natural water within 5 to 20 min. Theoretical simulations, including the evaporation and H-D exchange on various substrates, indicate that the removal is attributed to the H-D exchange. This result is reinforced by the experimental results, where platinum, a known catalyst for H-D exchange, can exceptionally enhance the separation of H<sub>2</sub>O/D<sub>2</sub>O. The microdroplet-based removal of D<sub>2</sub>O occurs efficiently under ambient conditions, offering a cost-effective approach for separating water isotopologues.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Removal of deuterium oxide from sessile microdroplets under ambient conditions

  • 期刊论文

  • 发表日期：

    2025年3月21日

查看全文
  • Yuchun Xu,
  • Li Yang,
  • Rui Tu,
  • Xu Fang,
  • Zhen Li,
  • Xin Xu,
  • Weiqiao Deng

摘要

The separation of the isotopologues of water is critically important for purification and practical applications; however, effective separation methods for this purpose are currently lacking. The similar physical and chemical properties of deuterium oxide (D2O) and water (H2O) cause challenges to existing techniques, which are both complex and energy-intensive, especially for large-scale separation of D2O from H2O/D2O mixtures. Herein, we discovered that D2O can be removed from H2O/D2O mixture through a three-phase interface in sessile microdroplets. This process converts D2O/H2O mixed microdroplets, ranging from 0.5 to 1.5 µL with D2O concentrations from 3% to 90%, into natural water within 5 to 20 min. Theoretical simulations, including the evaporation and H-D exchange on various substrates, indicate that the removal is attributed to the H-D exchange. This result is reinforced by the experimental results, where platinum, a known catalyst for H-D exchange, can exceptionally enhance the separation of H2O/D2O. The microdroplet-based removal of D2O occurs efficiently under ambient conditions, offering a cost-effective approach for separating water isotopologues.