Efficient removal of bismuth with supersoluble amorphous antimony acids: An insight into synthesis mechanism and Sb(V)-Bi(III) interaction behaviors

Yu, Tanna; Shen, Yukun; Zhang, Huibin; Xu, Shenghang

doi:10.1016/j.cej.2020.127617

Cited by 8 publications

(3 citation statements)

References 39 publications

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“…Polyantimonic acid was synthesized using the technique adopted from [48,49], including the oxidation of Sb(III) to Sb (IV) as the first step and hydrolysis of an obtained Sb (V) solution as the second step. Antimony (III) chloride (SbCl 3, Alfa Aesar, 99.0%, Kandel, GmbH, Germany) was used as a precursor.…”

Section: Crystalline Paa Powder Preparationmentioning

confidence: 99%

Enhancing Polyantimonic-Based Materials’ Moisture Response with Binder Content Tuning

Mendes,

Kurapova,

Faia

2023

Chemosensors

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Humidity sensors are of huge importance in diverse domains. Several types of materials present a moisture-sensing capacity; however, frequently, their electrical response does not display time stability. Due to its high thermal stability, high ionic conductivity, and different conduction mechanism contributing to its overall conductivity, polyantimonic acid (PAA) is seen as a promising material for humidity-sensing devices. In the present work, crystalline PAA was obtained via a simple and safe hydrolysis technique using SbCl3 as a precursor. Bulky sensor samples were produced using different amounts of polyvinyl alcohol (10–20 wt.% PVA) as a binder. The obtained PAA solid sensors were tested at room temperature (RT) in order to evaluate their moisture detection/measuring ability in the relative humidity range 0–100%; the evaluation was carried out with electrical impedance spectroscopy. The sample’s structure and morphology were studied using diverse experimental techniques (porosimetry, scanning electron microscopy, X-ray diffraction analysis, and thermogravimetry analysis, etc.). The sensors’ electrical response was in line with the found structural and morphological features. The slope of the resistance variation with an RH percentage concentration between 1 kΩ and 1.5 kΩ was noted for all sensors (showing no changes with time) in the interval between 30 and 100% RH. A good repeatability and reproducibility of the evaluated sensors’ electrical response was observed: the ones that displayed a higher sensitivity were the ones with a high PVA binder content, higher than previously published results for PAA, as well as a very good time stability along the time and low hysteresis.

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Section: Crystalline Paa Powder Preparationmentioning

confidence: 99%

Enhancing Polyantimonic-Based Materials’ Moisture Response with Binder Content Tuning

Mendes,

Kurapova,

Faia

2023

Chemosensors

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“…Here, protons are displaced along the hydrogen bonds from one water molecule (oxonium ion) to another, in certain crystallographic positions in the PAA structure. The ion exchange and electrical properties of PAA significantly depend on the synthesis approach used [22][23][24]. For instance, Yu et al [23,24] obtained super soluble amorphous antimonic acid via controlled hydrolysis of SbCl 3 that was previously oxidized to SbCl 5 ; then, using 30% of hydrogen peroxide, they performed an efficient removal of Bi(III) from the solution.…”

Section: Introductionmentioning

confidence: 99%

“…The ion exchange and electrical properties of PAA significantly depend on the synthesis approach used [22][23][24]. For instance, Yu et al [23,24] obtained super soluble amorphous antimonic acid via controlled hydrolysis of SbCl 3 that was previously oxidized to SbCl 5 ; then, using 30% of hydrogen peroxide, they performed an efficient removal of Bi(III) from the solution. Hydrated antimony pentoxide was obtained also by the research group of Klestchov et al [25,26], using the same hydrolysis technique approach.…”

Section: Introductionmentioning

confidence: 99%

Polyantimonic acid-based materials evaluated as moisture sensors at ambient temperature

Mendes

Kurapova

Faia

et al. 2022

J Solid State Electrochem

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Humidity sensors are in high demand for many applications, such as environmental monitoring and air and food quality control. Despite many inorganic and organic materials exhibit moisture sensing properties, the electrical response of many existing sensors is not stable along the time. Polyantimonic acid (PAA) is characterized by elevated proton conductivity and by high thermal stability: consequently, it is seen as promising proton conductor for usage in humidity sensing devices. In this work, for the first time, PAA-based bulk solid membranes were produced and tested as potential materials for relative humidity (RH) detection and their moisture sensitivity was evaluated. Two different amounts of binder were used for moulding the solid sensors: the ones with 10% of binder were designated as 90PAA, while the ones with 20% were named 80PAA. The structures of the solid samples were investigated by X-ray diffraction (XRD) technique, adsorption–desorption curves via Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) techniques. The electrical behaviour was examined at ambient temperature by electrical impedance spectroscopy in the entire relative humidity (RH) interval (0–100%) and in the frequency range of 40 Hz up to 60 MHz. Electrical response of the materials was correlated with the structural features of the membranes. Both 90PAA and 80PAA sensors showed total resistance 3 × 105 and 3.5 × 105 Ω at 10% RH, respectively. A linear decrease of the resistance on RH was observed in the range 30–90% RH for both sensors. The electrical response of the evaluated PAA-based sensors displays good repeatability and reproducibility: the ones with lower binder content showed higher moisture sensitivity as well as very good time stability over 1 year.

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The Hydrolysis Behavior of Antimony Trichloride and Phase Transformation Mechanism of Hydrolysates with the Effect of Arsenic

Feng,

Kong,

Liu

et al. 2024

JOM

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Efficient removal of bismuth with supersoluble amorphous antimony acids: An insight into synthesis mechanism and Sb(V)-Bi(III) interaction behaviors

Cited by 8 publications

References 39 publications

Enhancing Polyantimonic-Based Materials’ Moisture Response with Binder Content Tuning

Enhancing Polyantimonic-Based Materials’ Moisture Response with Binder Content Tuning

Polyantimonic acid-based materials evaluated as moisture sensors at ambient temperature

The Hydrolysis Behavior of Antimony Trichloride and Phase Transformation Mechanism of Hydrolysates with the Effect of Arsenic

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