Chemical Engineering Journal
Chemical Engineering Journal
5 years ago

Fabrication of organic-inorganic nanofiltration membrane using ordered stacking SiO2 thin film as rejection layer assisted with layer-by-layer method

Fabrication of organic-inorganic nanofiltration membrane using ordered stacking SiO2 thin film as rejection layer assisted with layer-by-layer method
In the past decades, application of nanomaterials in fabrication of organic-inorganic composite nanofiltration (NF) membrane for membrane performance improvement has been intensively studied. Herein, novel SiO2 organic-inorganic NF membrane was achieved using an ultrathin and ordered stacking SiO2 thin film as rejection layer assisted with layer-by-layer method. The resultant membrane showed a great enhancement in hydrophilicity with a membrane surface charge of −44mV. It exhibited typical characteristics of negatively charged NF membranes because of the rejection against negatively charged methyl blue and methyl orange was 99.5% and 97.6%, while the rejection for positively charged methylene blue decreased to 90.1%. Correspondingly, the water flux declined from 20L/m2·h to 9.1L/m2·h using 20ppm dye solutions as feed solution at 4bar. In addition, the salt rejection of the produced membrane followed the sequence of MgSO4 (88.7%)>Na2SO4 (82.1%)>MgCl2 (64.5%)>NaCl (43.1%), which was in accordance with the size exclusion and Donnan effect. The SiO2 organic-inorganic membrane presented a remarkable stability under high operating pressure as well as long-term NF test. To conclude, this work paves a new avenue to fabricate highly permeable and selective NF membrane by using inorganic thin film as rejection layer.

Publisher URL: www.sciencedirect.com/science

DOI: S1385894717313062

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.