Scholarlink

<p>The treatment of dye-containing oil-in-water emulsions remains challenging due to membrane fouling and limited operational stability. In this study, amino-functionalized metal-organic framework (MOF) NH<sub>2</sub>-MIL-125 was incorporated into polysulfone (PSF) membranes via phase inversion to fabricate mixed matrix membranes (MMMs) for oil-in-water emulsion separation and light-assisted self-cleaning. The separation test was conducted at 0.2&#xa0;MPa using an as-prepared sodium dodecyl sulfate (SDS)-stabilized n-hexane-in-water emulsion containing 1.0 vol% oil. Compared with pristine PSF, the optimized PN0.5 membrane showed a decrease in water contact angle (WCA) from 67.5 ± 2.0° to 22.7 ± 2.4° and an increase in underwater oil contact angle (UWOCA) from 73.0 ± 2.3° to 140.0 ± 2.6°, confirming enhanced hydrophilicity and underwater oleophobicity. PN0.5 achieved a permeate flux of approximately 245&#xa0;L·m⁻<sup>2</sup>·h⁻<sup>1</sup> and a separation efficiency close to 99%. Moreover, PN0.5 maintained approximately 98% separation efficiency during a seven-day cyclic filtration test. In a separate antifouling test, the membrane exhibited a low irreversible fouling ratio of 3.79%. Under irradiation with a 300&#xa0;W xenon lamp for 60&#xa0;min, the NH<sub>2</sub>-MIL-125-containing membrane promoted methylene blue (MB) decolorization and dye-foulant removal, while the irreversible fouling ratio remained low at 3.98% for the MB-containing emulsion after light-assisted self-cleaning. These results demonstrate the potential of NH<sub>2</sub>-MIL-125/PSF mixed-matrix membranes for treating dye-containing oily wastewater.</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

NH2-MIL-125-functionalized mixed-matrix membranes for efficient oil-in-water emulsion separation and light-assisted self-cleaning

  • 期刊论文

  • 发表日期：

    2026年7月27日

查看全文
  • Shouwu Yu,
  • Tingting Yue,
  • Yifu Chen,
  • Yuxia Tong,
  • Shujuan Xiao

摘要

The treatment of dye-containing oil-in-water emulsions remains challenging due to membrane fouling and limited operational stability. In this study, amino-functionalized metal-organic framework (MOF) NH2-MIL-125 was incorporated into polysulfone (PSF) membranes via phase inversion to fabricate mixed matrix membranes (MMMs) for oil-in-water emulsion separation and light-assisted self-cleaning. The separation test was conducted at 0.2 MPa using an as-prepared sodium dodecyl sulfate (SDS)-stabilized n-hexane-in-water emulsion containing 1.0 vol% oil. Compared with pristine PSF, the optimized PN0.5 membrane showed a decrease in water contact angle (WCA) from 67.5 ± 2.0° to 22.7 ± 2.4° and an increase in underwater oil contact angle (UWOCA) from 73.0 ± 2.3° to 140.0 ± 2.6°, confirming enhanced hydrophilicity and underwater oleophobicity. PN0.5 achieved a permeate flux of approximately 245 L·m⁻2·h⁻1 and a separation efficiency close to 99%. Moreover, PN0.5 maintained approximately 98% separation efficiency during a seven-day cyclic filtration test. In a separate antifouling test, the membrane exhibited a low irreversible fouling ratio of 3.79%. Under irradiation with a 300 W xenon lamp for 60 min, the NH2-MIL-125-containing membrane promoted methylene blue (MB) decolorization and dye-foulant removal, while the irreversible fouling ratio remained low at 3.98% for the MB-containing emulsion after light-assisted self-cleaning. These results demonstrate the potential of NH2-MIL-125/PSF mixed-matrix membranes for treating dye-containing oily wastewater.