scholarly journals Self-assembly modification of polyamide membrane by coating titanium dioxide nanoparticles for water treatment applications

2019 ◽  
Vol 14 (3) ◽  
pp. 1
Author(s):  
Rosangela Bergamasco ◽  
Priscila Ferri Coldebella ◽  
Franciele Pereira Camacho ◽  
Driano Rezende ◽  
Natalia Ueda Yamaguchi ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Self Assembly ◽  
Photocatalytic Performance ◽  
Titanium Dioxide Nanoparticles ◽  
Photocatalytic Decomposition ◽  
High Permeability ◽  
Physical Separation ◽  
Assembly Method ◽  
Wastewater Systems ◽  
Polyamide Membrane

This study modified the surface of a commercial polyamide membrane with the deposition of TiO2 nanoparticles by the self-assembly method under pressure with high permeability and photocatalytic activity. Changes in membrane characteristics and its performance for photocatalytic properties were evaluated. The results indicated that both membrane hydrophilicity and photocatalytic performance were significantly improved by the presence of TiO2 nanoparticles applied under a pressure of 1 bar. The deposition of the TiO2 particles under pressure was able to maintain the particles on the surface of the membranes and their photocatalytic capacity for three cycles of use. The prepared TiO2 photocatalytic membrane presented a great potential for wastewater treatment and for reuse wastewater systems due its ability to remove methylene blue (MB) dye solution by photocatalytic decomposition and physical separation.

The effect of ultrasonic waves on the fabrication of TiO2 nanoparticles on a substrate using a self-assembly method

2004 ◽  
Vol 21 (5) ◽  
pp. 1062-1065 ◽  
Author(s):  
Chang Yeon Yun ◽  
Soonwoo Chah ◽  
Sung Koo Kang ◽  
Jongheop Yi
Keyword(s):  
Tio2 Nanoparticles ◽  
Self Assembly ◽  
Ultrasonic Waves ◽  
Assembly Method

Preparation, Characterization, and Photocatalytic Performance of Bismuth and Boron Co-Doped Mesporous TiO2 by EISA Method

2014 ◽  
Vol 953-954 ◽  
pp. 1003-1007
Author(s):  
Yu Xiu Zhang ◽  
Li Yang ◽  
Dai Mei Chen ◽  
Shuang Deng ◽  
Ying Jie Shi
Keyword(s):  
Visible Light ◽  
Self Assembly ◽  
Photocatalytic Performance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Assembly Method ◽  
Transmission Electron ◽  
Evaporation Induced Self Assembly ◽  
Crystallite Sizes ◽  
Mesoporous Structures

Abstract. The large-pore mesoporous Bi-B-TiO2 nanoparticles with the different Bi/Ti rations were prepared by EISA(evaporation-induced self-assembly) method. The prepared catalysts were characterized by X-ray diffraction, transmission electron microscopy, N2 absorption-desorption, ultraviolet visible light spectroscopy and photoluminescence spectroscopy technologies. The results revealed that all the samples are large aperture mesoporous structures. The crystallite sizes were in the range7-11nm, as confirmed by the results obtained from TEM images. The photodecomposition experiments showed that the photodegradation activity of Bi-B-doped TiO2 was higher than that of undoped TiO2 in degradation of 2, 4–dichlorophenol under visible light irradiation.

scholarly journals Effective Electrons Transfer Pathway of the Ternary TiO2/RGO/Ag Nanocomposite with Enhanced Photocatalytic Activity under Visible Light

2017 ◽  
Author(s):  
Hongwei Tian ◽  
Chenxing Wan ◽  
Xin Xue ◽  
Xiaoying Hu ◽  
Xiaoyi Wang
Keyword(s):  
Visible Light ◽  
Self Assembly ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Mesoporous Tio2 ◽  
Local Surface ◽  
Local Surface Plasmon Resonance ◽  
Assembly Method ◽  
Ternary Nanocomposite ◽  
Reduced Graphene

Mesoporous TiO2/reduced graphene oxide/Ag (TiO2/RGO/Ag) ternary nanocomposite with effective electrons transfer pathway is obtained by an electrostatic self-assembly method and photo-assisted treatment. Compared with bare mesoporous TiO2 (MT) and mesoporous TiO2/RGO (MTG), the ternary mesoporous TiO2/RGO/Ag (MTGA) nanocomposite exhibited superior photocatalytic performance for the degradation of MB under visible light, and the degradation rate reached 0.017 min-1, which was 3.4 times higher than that of MTG. It is proposed that Ag nanoparticles can form the local surface plasmon resonance (LSPR) to absorb the visible light and distract the electrons into MT, and RGO can accept the electrons from MT to accelerate the separation efficiency of carriers. The establishment of MTGA ternary nanocomposite make the three components act synergistic effect to enhance the photocatalytic performance.

scholarly journals CO2 separation membranes with high permeability and CO2/N2 selectivity prepared by electrostatic self-assembly of polyethylenimine on reverse osmosis membranes

RSC Advances ◽  
2017 ◽  
Vol 7 (24) ◽  
pp. 14678-14687 ◽  
Author(s):  
Jing Sun ◽  
Zhuan Yi ◽  
Xueting Zhao ◽  
Yong Zhou ◽  
Congjie Gao
Keyword(s):  
Reverse Osmosis ◽  
Self Assembly ◽  
Facilitated Transport ◽  
Co2 Separation ◽  
High Permeability ◽  
Separation Membranes ◽  
Assembly Method ◽  
Reverse Osmosis Membranes

A facilitated transport membrane with high CO2 permeance and CO2/N2 selectivity was prepared by an aqueous self-assembly method using commercially available PEI and RO membranes as the assembled molecule and substrate, respectively.

Self-assembly method assisted synthesis of g-C3N4/ZnO heterostructure nanocomposites with enhanced photocatalytic performance

2019 ◽  
Vol 96 ◽  
pp. 109266 ◽  
Author(s):  
Xu Tan ◽  
Xing Wang ◽  
He Hang ◽  
Dongyang Zhang ◽  
Ning Zhang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Photocatalytic Performance ◽  
Assembly Method
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