Ag NPs coated PVDF@TiO2 nanofiber membrane prepared by epitaxial growth on TiO2 inter-layer for 4-NP reduction application
TL;DR: In this article, a novel catalytic membrane was prepared by growing Ag NPs on the porous PVDF@TiO2 nanofiber (NF) based on the epitaxial growth principle.
About: This article is published in Separation and Purification Technology.The article was published on 2019-11-15. It has received 33 citations till now. The article focuses on the topics: Membrane & Nanofiber.
Citations
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TL;DR: A facile and green method was employed to fabricate highly efficient catalyst to turn toxic nitrophenols to more safe aminophenols and the comparison rate kinetics study showed that the FALS-BNC has higher potential in the case of the para derivative.
63 citations
TL;DR: In this paper, a convenient and environment-friendly grafting and reduction strategy was used to anchor bimetallic Ag-Cu nanoparticles on polypropylene (PP) fabrics.
51 citations
TL;DR: In this paper, a novel in situ biomineralization method was developed to fabricate superhydrophilic and underwater superoleophobic PVDF-TiO2 membranes with conformal TiO2 coatings on both the top and internal surfaces.
48 citations
TL;DR: In this paper , an [email protected] catalytic nanofiber composite membrane has been fabricated by combining electrospinning PAN seeding with 2-MI and flowing synthesis, where ZIF-8 can be immobilized on the surface of the nanofibers with Zn(NO3)2 solution flowing through the 2MI/PAN membrane and Ag nanoparticles can be exchanged by Ag+ followed with reduction reaction.
22 citations
TL;DR: In this paper, an Ag@PAN catalytic nanofiber composite membrane has been fabricated by combining electrospinning PAN seeding with 2-MI and flowing synthesis, where Zn 2+ in ZIF-8 exchanged by Ag+ followed with reduction reaction.
22 citations
References
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TL;DR: In this article, the surfaces of hydrophilic and hydrophobic TiO2 particles were characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectrography (FTIR) to gain a better understanding of the adsorption mechanism of OLOA 370 (polybutene-succinimide pentamine) on TiO 2 particles dispersed in styrene monomer prior to miniemulsion encapsulation polymerizations.
Abstract: The surfaces of hydrophilic (P25) and hydrophobic (T805) TiO2 particles were characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) to gain a better understanding of the adsorption mechanism of OLOA 370 (polybutene-succinimide pentamine) on TiO2 particles dispersed in styrene monomer prior to miniemulsion encapsulation polymerizations. XPS analysis revealed that both the P25 and T805 TiO2 particles had significant amounts of hydroxyl groups on their surfaces. The XPS results showed that the surface hydroxyl concentration on the hydrophilic (P25) particles was 3.3 OH/nm2, whereas the trimethoxy octyl silane (TMOS)-surface-modified hydrophobic (T805) particles unexpectedly contained 6.6 OH/nm2. This apparent increase in the hydroxyls was attributed to hydrolysis of −OCH3 on the TMOS. The majority of these groups, however, were apparently either not acidic or not accessible to the OLOA 370 in adsorption studies, where the concentration of reactive hydroxyls...
808 citations
TL;DR: In this paper, the state-of-the-art progress on fabrication and modification of electrospun polymeric membranes with a particular emphasis on their advances, challenges and future improvement in water treatment applications is summarized.
534 citations
TL;DR: In this paper, a comparative X-ray photoelectron spectroscopy (XPS) analysis of Ag 3d, Ni 2p and O1s core levels was performed in combination with Xray diffraction and optical absorption spectrographs in the visible range.
445 citations
TL;DR: In this paper, the TiO2 nanoparticles were directly anchored on the surface of poly(vinylidene fluoride) (PVDF) membrane, making the intrinsic hydrophobic polymer membrane become hydrophilic, what's more, the mussel inspired method was modified by introducing a silane coupling agent KH550, the ability to bind nanoparticles was retained and the as-prepared membrane turn from a common hydrophic state to superhydrophilic state.
400 citations
TL;DR: In this paper, the surface composition and electronic structure of Au/TiO2 catalysts in comparison with TiO2 (anatase) and to reveal time-dependent X-ray irradiation damage of the samples.
Abstract: X-ray photoelectron spectroscopy (XPS) was employed to study the surface composition and electronic structure of Au/TiO2 catalysts in comparison with TiO2 (anatase) and to reveal time-dependent X-ray irradiation damage of the samples. The occurrence of Au nano-sized particles on a TiO2 support was found to result in a slight shift of Ti 2p core-level spectrum and in changes of the valence band and X-ray induced Auger spectra, compared to TiO2-only. It was shown that for different means of energy referencing the charge-corrected Au 4f7/2 binding energy in Au/TiO2 catalysts was 0.15–0.45 eV lower than that in pure bulk Au. Exposure to X-rays of Au/TiO2 catalysts and pure TiO2 caused a reduction of Ti 4+ oxidation state and desorption of oxygen from the surface. As a result, the surface chemical composition and electronic structure of the samples changed with time. The X-ray irradiation affected charge transfer processes in Au/TiO2 so that the pattern of X-ray induced damage in the Au-based catalyst turned out to be quite different from that in TiO2, with some characteristics displaying the very opposite features. Decreasing of the Au 4f7/2 binding energy and concurrent increasing of the fraction of Ti3+ species observed in the beginning of X-ray irradiation of Au/TiO2 may be taken as direct evidence for charge transfer from oxygen vacancies created by irradiation to Au particles.
369 citations