Thermal stability study of Pd-composite membrane fabricated by surfactant induced electroless plating (SIEP)

Islam, Syed Z.; Deshmane, Vishwanath G.; Ilias, Shamsuddin

doi:10.1080/01496395.2015.1109661

Cited by 7 publications

(4 citation statements)

References 44 publications

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“…Membrane-based technologies are extensively used for energy-efficient separations, which have shown immense potential in a wide variety of separations in aqueous and gas phase systems rejecting solutes with size ranging from few micrometers to nanometers [2–7]. Recently, membranes incorporated with some catalytic element have gained attention for decomposition of organic impurities owing to advantages, such as continuous mode of operation, along with their capability to separate solutes [8–10]. In this study, we explored the application of Fe x O y functionalized membranes and commercial nanofiltration (NF) membranes for remediation of the naphthenic acids (NA) from water containing high concentrations of total dissolved solids (TDS).…”

Section: Introductionmentioning

confidence: 99%

Naphthenic acids removal from high TDS produced water by persulfate mediated iron oxide functionalized catalytic membrane, and by nanofiltration

Aher

Papp

Colburn

et al. 2017

Chemical Engineering Journal

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Oil industries generate large amounts of produced water containing organic contaminants, such as naphthenic acids (NA) and very high concentrations of inorganic salts. Recovery of potable water from produced water can be highly energy intensive is some cases due to its high salt concentration, and safe discharge is more suitable. Here, we explored catalytic properties of iron oxide (FexOy nanoparticles) functionalized membranes in oxidizing NA from water containing high concentrations of total dissolved solids (TDS) using persulfate as an oxidizing agent. Catalytic decomposition of persulfate by FexOy functionalized membranes followed pseudo-first order kinetics with an apparent activation energy of 18 Kcal/mol. FexOy functionalized membranes were capable of lowering the NA concentrations to less than discharge limits of 10 ppm at 40 °C. Oxidation state of iron during reaction was quantified. Membrane performance was investigated for extended period of time. A coupled process of advanced oxidation catalyzed by membrane and nanofiltration was also evaluated. Commercially available nanofiltration membranes were found capable of retaining NA from water containing high concentrations of dissolved salts. Commercial NF membranes, Dow NF270 (Dow), and NF8 (Nanostone) had NA rejection of 79% and 82%, respectively. Retentate for the nanofiltration was further treated with advanced oxidation catalyzed by FexOy functionalized membrane for removal of NA.

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Section: Introductionmentioning

confidence: 99%

Naphthenic acids removal from high TDS produced water by persulfate mediated iron oxide functionalized catalytic membrane, and by nanofiltration

Aher

Papp

Colburn

et al. 2017

Chemical Engineering Journal

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“…Molecular hydrogen is considered to be one of the best alternative green energy sources to renewably fulfill increasing global energy demands [228]. Hydrogen can be produced with solar energy by water splitting using a semiconductor photocatalyst.…”

Section: Water Splittingmentioning

confidence: 99%

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

et al. 2017

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Mesoporous titania (mp-TiO 2 ) has drawn tremendous attention for a diverse set of applications due to its high surface area, interfacial structure, and tunable combination of pore size, pore orientation, wall thickness, and pore connectivity. Its pore structure facilitates rapid diffusion of reactants and charge carriers to the photocatalytically active interface of TiO 2 . However, because the large band gap of TiO 2 limits its ability to utilize visible light, non-metal doping has been extensively studied to tune the energy levels of TiO 2 . While first-principles calculations support the efficacy of this approach, it is challenging to efficiently introduce active non-metal dopants into the lattice of TiO 2 . This review surveys recent advances in the preparation of mp-TiO 2 and their doping with non-metal atoms. Different doping strategies and dopant sources are discussed. Further, co-doping with combinations of non-metal dopants are discussed as strategies to reduce the band gap, improve photogenerated charge separation, and enhance visible light absorption. The improvements resulting from each doping strategy are discussed in light of potential changes in mesoporous architecture, dopant composition and chemical state, extent of band gap reduction, and improvement in photocatalytic activities. Finally, potential applications of non-metal-doped mp-TiO 2 are explored in water splitting, CO 2 reduction, and environmental remediation with visible light.

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“…Therefore, a complete understanding and control of the fabrication process is crucial in tailoring and tuning the properties of thin films. Palladium (Pd) thin films have been synthesized by various deposition techniques including evaporation, 9,10 chemical/physical vapor deposition (PVD/CVD), sputtering, [11][12][13][14][15][16][17][18][19][20] sol-gel method, electrodeposition and electroless deposition. [21][22][23][24][25][26][27][28] Among other deposition techniques electroless deposition is an attractive thin film coating technique due to its flexibility, low cost, simplicity, ability to coat complex shapes and ease of control.…”

mentioning

confidence: 99%

Effects of Palladium Chloride Concentration on the Nanoscale Surface Morphology of Electroless Deposited Palladium Thin Film

Mpofu

Tapiwanashe

Tatenda

et al. 2021

J. Electrochem. Soc.

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Understanding the effects of thin film electroless deposition parameters at nanoscale is crucial for complete understanding and control of the thin film deposition process. In this study, we investigated and optimized the effect of PdCl 2 precursor concentration on the nanoscale surface morphology of electroless deposited Pd thin film. The FESEM characterization of plain substrates showed that the dominant features of plain alumina substrates were terraces, steps and bumpy microstructures and the final surface morphologies of the deposited Pd thin film was strongly dependant on the surface morphologies of the substrate. FESEM characterization results of seeding technique displayed a thin film of Pd nanoparticles on the surface of the alumina substrate. The number of times that the seeding process was carried out was optimized at five seeding times using hydrazine as a reducing agent. FESEM characterization revealed that the nanoscale surface morphology of the Pd thin film was strongly dependent on PdCl 2 precursor concentration. Three types of secondary nanoscale surface morphologies formed were nanorods, nanoflakes and flower-like Pd nanostructures at various concentrations. The nanoflake surface density was strongly dependent on PdCl 2 precursor concentration. Results of this research provided a foundation and method to tailor the nanoscale surface morphology to the specific requirement of surface dependent processes or reactions.

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Thermal stability study of Pd-composite membrane fabricated by surfactant induced electroless plating (SIEP)

Cited by 7 publications

References 44 publications

Naphthenic acids removal from high TDS produced water by persulfate mediated iron oxide functionalized catalytic membrane, and by nanofiltration

Naphthenic acids removal from high TDS produced water by persulfate mediated iron oxide functionalized catalytic membrane, and by nanofiltration

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

Effects of Palladium Chloride Concentration on the Nanoscale Surface Morphology of Electroless Deposited Palladium Thin Film

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