Zirconium and aluminum oxyhydroxides particles formation during sol–gel process

Sorochkina, Kateryna; Smotraiev, Roman; Chepurna, Iryna

doi:10.1016/j.colsurfa.2015.07.038

Cited by 11 publications

(4 citation statements)

References 27 publications

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“…The precipitates were then separated and dried at 120 °C for 12 h. The ground RZr sample appears as a powder, and HZrO@D201 is prepared as follows: 15 g of ZrOCl 2 ·8H 2 O was dissolved in 100 mL of the solution [containing 30% (v/v) ethanol and 5% HCl], where zirconium mainly exists as a tetramer [Zr 4 (OH) 8 (H 2 O) 16 ] 8+ . This conclusion is based on numerous previous studies. , Then, 5 g of D201 was added, and the mixture was stirred for 24 h at 50 °C. After this, Zr(IV)-loaded D201 was separated from the solution and added into a 15 wt % NaOH solution with stirring for 24 h. [Zr(OH) 4 ] n gradually precipitated in the pore of D201 during this process.…”

Section: Methodsmentioning

confidence: 91%

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Efficient Treatment of Phosphorus-Containing Wastewater with Anion-Exchange Resin-Supported Nanohydrated Zirconia: Performance and Zr–P Structure Evolution Mechanism

Sun

Wang

et al. 2023

ACS EST Eng.

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Zirconium (Zr)-based nanomaterials have been considered efficient in removing phosphate (P) from effluent. Compared to rough-wrought Zr(OH)4, Zr-based nanoparticles perform efficient P removal when confined in nanospace. However, the effect of nanoconfinement on the evolution of the Zr–P structure in a long-term wastewater treatment process was unclear. Herein, commercial D201 was used as a host for nanohydrous zirconium oxide (HZrO) to investigate the development of Zr–P structures. The kinetics of HZrO@D201 and the structural evolution of Zr–P in a long-term wastewater treatment process (25 days) were characterized. The competitive effects of co-existing ions (HCO3 –, SO4 2–, Cl–, and NO3 –) on phosphate adsorption were investigated. X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and scanning electron microscopy results illustrate the transformation from Zr–P inner-sphere complexes to zirconium phosphate nanoparticles in HZrO@D201. In short, the nanoconfinement helped HZrO@D201 to capture P quickly in P-containing wastewater treatment and induced the self-desorption behavior of HZrO@D201 in the long-term treatment process. This study provides a new perspective on the dephosphorization by zirconium-based nanomaterials and a scientific basis for applying the nanomaterials for phosphate resource mitigation and recovery from the environment.

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Section: Methodsmentioning

confidence: 91%

“…This conclusion is based on numerous previous studies. 24,25 Then, 5 g of D201 was added, and the mixture was stirred for 24 h at 50 °C. After this, Zr(IV)-loaded D201 was separated from the solution and added into a 15 wt % NaOH solution with stirring for 24 h. [Zr(OH) 4 ] n gradually precipitated in the pore of D201 during this process.…”

Section: Introductionmentioning

confidence: 99%

Efficient Treatment of Phosphorus-Containing Wastewater with Anion-Exchange Resin-Supported Nanohydrated Zirconia: Performance and Zr–P Structure Evolution Mechanism

Sun

Wang

et al. 2023

ACS EST Eng.

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“…Supporting Information for this article can be found under DOI: https://doi.org/10.1002/cite.202300032. This section includes additional references to primary literature relevant for this research [41][42][43][44][45][46][47][48][49][50][51][52]. In the Supporting Information the influence of the applied surface etching process on the molecular surface chemistry of stainless steel is described by XPS.…”

Section: Supporting Informationmentioning

confidence: 99%

Monitoring Polymeric Fouling in a Continuous Reactor by Electrochemical Impedance Spectroscopy

Neßlinger,

Rust,

Atlanov

et al. 2023

Chemie Ingenieur Technik

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Monitoring early stages of polymeric deposit formation and its prevention were studied by in‐situ electrochemical impedance spectroscopy (EIS) in a continuously operating reactor employed for polymer production. An EIS flow cell was designed and employed during the emulsion polymerization of vinyl acetate. The electrochemical analysis of the complex impedance at the solution/reactor interface allows the time‐resolved detection of film formation processes. In comparison to oxide‐covered stainless steel, an anti‐adhesive sol‐gel coated alloy showed a significant inhibition of poly(vinyl acetate) fouling. The EIS‐based approach proved to be a valuable tool for monitoring both thin barrier film performance and fouling processes under harsh process conditions.

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“…Here, we discuss energy demands and the current trends in metal-OxH-based composite materials in various EC applications including the water-splitting reaction [ 5 ], OER [ 6 ], and oxygen reduction reactions (ORR) [ 7 ]. Generally, more efficient OxH-based electrocatalysts have been synthesized using different approaches [ 8 , 9 ], including the sol-gel [ 10 ], template-assisted [ 11 ], microwave-assisted [ 12 ], and hydrothermal (HT) [ 13 ] methods. However, with these methods, controlling the size and shape of the electrocatalysts is challenging.…”

Section: Introductionmentioning

confidence: 99%

Metal-Oxides- and Metal-Oxyhydroxides-Based Nanocomposites for Water Splitting: An Overview

Chen,

Anushya

et al. 2023

Nanomaterials

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Water electrolysis is an important alternative technology for large-scale hydrogen production to facilitate the development of green energy technology. As such, many efforts have been devoted over the past three decades to producing novel electrocatalysis with strong electrochemical (EC) performance using inexpensive electrocatalysts. Transition metal oxyhydroxide (OxH)-based electrocatalysts have received substantial interest, and prominent results have been achieved for the hydrogen evolution reaction (HER) under alkaline conditions. Herein, the extensive research focusing on the discussion of OxH-based electrocatalysts is comprehensively highlighted. The general forms of the water-splitting mechanism are described to provide a profound understanding of the mechanism, and their scaling relation activities for OxH electrode materials are given. This paper summarizes the current developments on the EC performance of transition metal OxHs, rare metal OxHs, polymers, and MXene-supported OxH-based electrocatalysts. Additionally, an outline of the suggested HER, OER, and water-splitting processes on transition metal OxH-based electrocatalysts, their primary applications, existing problems, and their EC performance prospects are discussed. Furthermore, this review article discusses the production of energy sources from the proton and electron transfer processes. The highlighted electrocatalysts have received substantial interest to boost the synergetic electrochemical effects to improve the economy of the use of hydrogen, which is one of best ways to fulfill the global energy requirements and address environmental crises. This article also provides useful information regarding the development of OxH electrodes with a hierarchical nanostructure for the water-splitting reaction. Finally, the challenges with the reaction and perspectives for the future development of OxH are elaborated.

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Zirconium and aluminum oxyhydroxides particles formation during sol–gel process

Cited by 11 publications

References 27 publications

Efficient Treatment of Phosphorus-Containing Wastewater with Anion-Exchange Resin-Supported Nanohydrated Zirconia: Performance and Zr–P Structure Evolution Mechanism

Efficient Treatment of Phosphorus-Containing Wastewater with Anion-Exchange Resin-Supported Nanohydrated Zirconia: Performance and Zr–P Structure Evolution Mechanism

Monitoring Polymeric Fouling in a Continuous Reactor by Electrochemical Impedance Spectroscopy

Metal-Oxides- and Metal-Oxyhydroxides-Based Nanocomposites for Water Splitting: An Overview

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