Details

Autor(en) / Beteiligte

• Zhang, Yuqing
• Liu, Pingli

Titel

Polysulfone(PSF) composite membrane with micro-reaction locations (MRLs) made by doping sulfated TiO2 deposited on SiO2 nanotubes (STSNs) for cleaning wastewater

Ist Teil von

• Journal of membrane science, 2015-11, Vol.493, p.275-284

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In order to further enhance the properties of polysulfone (PSF) membrane, such as hydrophilicity, anti-fouling and anti-compaction performance, sulfated TiO2 deposited on SiO2 nanotubes (STSNs) with super strong acid, tubular structure and high ratio of length to diameter were firstly prepared and then added to PSF to prepare STSNs/PSF composite membranes with micro-reaction locations (MRLs) inside channels and surface of membranes. STSNs and STSNs/PSF composite membranes were studied by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and contact angle of water, anti-compaction, respectively. The results show that the length of STSNs is 8µm and the inner diameter is 300nm, the ratio of length to diameter of SiO2 nanotubes is approximately 27; SiO42−/TiO2–SiO2 nanotube solid superacid is formed through depositing TiO2 nanoparticles on SiO2 nanotubes due to a stretching vibration peak of S=O double bond at 1300cm−1 in FT-IR spectra; the contact angle of STSNs/PSF composite membranes is declined from 76.5° to 36.5°. Compared with PSF membranes, SiO2/PSF membranes and phosphorylated Zr-doped hybrid silica (SZP)/PSF membranes, STSNs/PSF composite membranes show stronger anti-fouling and anti-compaction performance. Therefore, STSN/PSF composite membranes are desirable for treating wastewater containing oil. •STSNs (sulfated TiO2 deposited on SiO2 nanotubes) are successfully prepared.•STSNs/PSF composite membranes are successfully prepared.•Micro-reaction locations inside channels and surface of PSF membranes are formed.•STSNs/PSF composite membranes perform good anti-fouling, anti-compaction properties.