Facile surface modification of a polyamide reverse osmosis membrane using a TiO2 sol-gel derived spray coating method to enhance

2018 ◽  
Vol 102 ◽  
pp. 9-15 ◽  
Author(s):  
Jungchan Kim ◽  
Choonsoo Kim ◽  
Youngbin Baek ◽  
Sung Pil Hong ◽  
Hee Joong Kim ◽  
...  
Keyword(s):  
Surface Modification ◽  
Reverse Osmosis ◽  
Sol Gel ◽  
Spray Coating ◽  
Reverse Osmosis Membrane ◽  
Tio2 Sol ◽  
Coating Method

Deposition of Ag 2~6 mol%-Doped ZnO Photocatalyst Thin Films by Thermal Spray Coating Method for E.coli Bacteria Degradation

2015 ◽  
Vol 827 ◽  
pp. 3-6 ◽  
Author(s):  
Heri Sutanto ◽  
Iis Nurhasanah ◽  
Eko Hidayanto
Keyword(s):  
Thin Films ◽  
Thermal Spray ◽  
Sol Gel ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Alcoholic Solution ◽  
Sem Images ◽  
E Coli ◽  
Coating Method ◽  
Temperature Deposition

ZnO doped with 2~6 mol% Silver (Ag) photocatalyst thin films has been deposited on glass substrate by thermal spray coating with temperature deposition of 250°C. A gel of ZnO:Ag precursor has been synthesized by sol-gel route from aqueous/alcoholic solution of zinc acetate dehydrate and silver nitrate mixture at room temperature. The morphology of ZnO:Ag films were investigated scanning electron microscopy (SEM). 3D SEM images of ZnO:Ag thin films show the rough morphology with roughness mean square (rms) of 150 to 195 nm. The grain size of ZnO:Ag films were found in the range 76,5 to 304,8 nm. The photoactivity examination of ZnO:Ag photocatalyst films show the E. Coli bacteria degraded up to 99.99% under sunlight irradiation for 4 hours.

SiO2 and TiO2 Sol-Gel Blends with Tunable Optical and Electronic Properties

MRS Advances ◽  
2019 ◽  
Vol 4 (11-12) ◽  
pp. 689-695
Author(s):  
Stephanie Arouh ◽  
Roland Himmelhuber ◽  
Robert A. Norwood
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
Initial Mixture ◽  
High Refractive Index ◽  
Dielectric Constants ◽  
Glass Substrates ◽  
Optical And Electronic Properties ◽  
Tio2 Sol ◽  
Coating Method ◽  
Lower Refractive Index

Sol-gel blends are created using a combination of a high refractive index (n∼2.4) TiO2 based sol-gel and a low refractive index (n∼1.5) SiO2 based sol-gel. The blends are prepared with different ratios of sol-gels and films are created using the spin coating method on silicon and ITO-on-glass substrates. The film thickness, refractive index, and dielectric constants of the resulting films are measured using profilometry, prism coupling, and LCR measurements, respectively. Results show that including more SiO2 based sol-gel in the initial mixture creates thicker films ranging from 1-7 μm, but results in lower refractive index and lower dielectric constants. This is consistent with expectations due to SiO2 having a lower refractive index and dielectric constant than titania over a range of wavelengths andfrequencies. The ability to fine tune the properties is explored.

scholarly journals Raman Spectroscopy and XRD investigation on TiO2 sol-gel dip coating thin films synthesizes with and without solvents

2018 ◽  
Vol 150 ◽  
pp. 04007 ◽  
Author(s):  
Shuhadah A. Yazid ◽  
Zulkifli Mohd. Rosli ◽  
Jariah Mohamad Juoi ◽  
Nur Dalilah Johari
Keyword(s):  
Thin Films ◽  
Raman Spectroscopy ◽  
Crystallite Size ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Coating Films ◽  
Tio2 Sol ◽  
Coating Method ◽  
Dip Coating Method

TiO2 coating films were prepared by sol-gel dip coating method using TTiP precursors with and without ethanol as a medium to hydrolyze the HCl catalyst. The prepared samples of titanium dioxide (TiO2) coating were dried at 110°C for 30 minutes then heated at 500°C and 600°C for 1h and 3h respectively to study effect of annealing temperature and soaking time. The crystallinity of the TiO2 coating were identified by using X-ray Diffraction technique and crystallite size was calculated. Raman Spectroscopy also used as the confirmation of phases formation of TiO2 coating films. Crystallite size of TiO2 films were obtained at 12.35 nm, 17.29 nm for anatase, 21.71 nm, 28.95 nm for rutile and 2.19 nm for brookite. Thus, the establishment of the desired phases, crystallinity and grain size of TiO2 thin films sol-gel can be controlled and encouraging to explore as an effort toward producing a sustainable photocatalytic.

Fabrication of Reverse Osmosis Membrane with Enhanced Boron Rejection Using Surface Modification

2018 ◽  
Vol 28 (2) ◽  
pp. 96-104
Author(s):  
Deok-Ro Lee ◽  
◽  
Jong Hak Kim ◽  
Sei Kwon ◽  
Hye-Jin Lee ◽  
...  
Keyword(s):  
Surface Modification ◽  
Reverse Osmosis ◽  
Reverse Osmosis Membrane
Sign in / Sign up

Export Citation Format

Share Document