Sensors on low-dimensional silicon structures

Bilenko, D. I.; Belobrovaya, O. Ya.; Jarkova, E. A.; Coldobanova, O.; Mysenko, I. B.; Khasina, E. I.

doi:10.1016/s0924-4247(97)01621-x

Cited by 15 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3] However, some of its unique physicochemical properties have made this element indispensable in numerous elds, namely, electronics, catalysis, medicine, chemical technology, etc. [3][4][5] In recent years, some signicant applications of palladium, such as, hydrogen storage materials, [6][7][8] photovoltaic materials, 9,10 gas sensors, 11,12 metallic glass formations, [13][14][15] catalyst for degradation of toxic organic compounds in aqueous streams, 16,17 etc., have made this even more sought aer element. The numerous applications of palladium have increased the demand for palladium thereby putting the pressure on the scarce natural resources.…”

Section: Introductionmentioning

confidence: 99%

Separation of palladium from high level liquid waste – A review

et al. 2014

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Separation of palladium from high level liquid waste – A review

et al. 2014

View full text Add to dashboard Cite

“…Peroxopolytungstic acid films prepared by the sol3gel technique with Pd additives exhibit a gasochrome effect when treated with hydrogen or H/Ar mixture in air. Also, sensors sensitive to H 2 S are manufactured from Pd-coated porous and amorphous Si [74] and exhibit high sensitivity (10 320 ppb), low working voltage (131.5 V), and low energy consumption (10 !8 310 !6 W). Numerous gas sensors with catalysts from Pd were patented (see, e.g., [75,76]).…”

Section: Possible Use Of Pd: Economic Aspectsmentioning

confidence: 99%

Palladium in Irradiated Fuel. Are There Any Prospects for Recovery and Application?

Pokhitonov

Romanovskii

2005

Radiochemistry

View full text Add to dashboard Cite

Published data on the speciation and behavior of Pd in different stages of reprocessing of irradiated fuel from NPPs were analyzed. Various methods for recovering Pd from solutions and solids of different compositions, arising in reprocessing, were described. The Pd sales volumes in the recent decades were reported, and possible industrial and technical applications of Pd were discussed. An opinion is expressed that it is of interest to recover [reactor-grade] Pd to be used in reprocessing of the waste from radiochemical enterprises (e.g., immobilization of 129 I and/or TPEs), i.e., in processes where the presence of radioactive nuclide 107 Pd does not matter and exhaustive removal of other fission products is not required.The history of science and technology abounds in cases where ideas, set aside many years ago, are revived. This is true of the attempted recovery of platinum group metals (PGMs) from irradiated fuel of NPPs. The first relevant publications [133] appeared about 50 years ago, and their authors considered it very attractive to find the possibilities of recovering Pd and Rh whose yield in uranium fission products is fairly high, namely, kilograms per ton of fuel. But as yet, no country has succeeded in developing an acceptable method for commercial recovery of platinum metals from real radioactive solutions. This is due to a number of reasons.The main purpose of irradiated nuclear fuel reprocessing is to recover U and Pu and to localize fission products, rather than to recover individual radionuclides intended for commercial purposes. On the other hand, the use of any radionuclides, even minimally active, is extremely negatively received by the public. Probably, this is the most significant negative factor that questions the appearance of a demand for [reactor-grade] Pd or Rh in their traditional application spheres, even if they will be cheaper than Pd and Rh extracted from ores.At the same time, depletion of mineral resources of platinum metals will sooner or later cause their prices to rise to the level when irradiated fuel could become a real substitute to their commercial production sources. Since recently, technologies for high-level waste (HLW) partitioning have been developed, which would yield solutions that are less active and simpler in composition than the first extraction cycle raffinates containing all the fission products and, thus, will be suitable for recovery of Pd and Rh.In this work, we analyzed publications on recovery of Pd from irradiated fuel. Since the prospects for commercial recovery of Pd are directly related to technical demands and natural reserves, we considered it necessary to supplement this review with a section devoted to possible applications of Pd and its compounds.

show abstract

“…Palladium is a precious metal exploited in various industrial applications, including corrosion-resistant materials, gas sensors, catalysis, electronics, refining, jewelry, pharmaceuticals, etc., due to its versatile physical and chemical properties. − In addition, it plays an important role in the automobile industry as a catalytic converter to lower the releasing harmful pollutants. , However, excessive palladium is highly toxic and carcinogenic to humans, and it may cause skin, eye, or respiratory tract irritation and also skin sensitization . The availability of palladium in the earth’s crust is very small (∼10 –6 %) in the form of alloy with gold and other platinoides, while high level liquid generated in the nuclear industry during reprocessing of spent nuclear fuel contains significant amounts of palladium metal .…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Chemically Stable Silica-Embedded UiO-66-SO₃H MOF for the Efficient Recovery of Pd(II) from an Acidic Medium: Experimental and DFT Study

Vaddanam,

Sengupta,

Sreenivasulu

et al. 2024

Crystal Growth & Design

View full text Add to dashboard Cite

A highly stable acid-resistant Si@-UiO–SO3H MOF was synthesized and utilized for the rapid and efficient extraction of Pd from an acidic medium (nitric acid). FTIR, powder XRD, TGA, NMR, UV–vis absorption spectroscopy, SEM, and EDX were employed for the characterization of synthesized UiO-66-SO3H and Si@-UiO-66-SO3H MOFs. Chemical stability studies were performed to both the MOFs in nitric acid and aqueous medium (pH 1–9). Chemical studies demonstrated that Si@-UiO-66-SO3H is stable up to 8 M acid (HNO3), while UiO-66-SO3H is stable only up to 0.01 M acid (HNO3). However, two MOFs exhibited good stability in the whole range of pH from 2 to 9. Both UiO-66-SO3H and Si@-UiO-66-SO3H MOFs had been investigated for Pd(II) sorption from aqueous (pH) as well as acidic medium via the batch method. Sorption studies revealed that Si@-UiO-66-SO3H showed rapid (∼5 min) and high sorption efficiency (∼84%) toward Pd(II) with a sorption capacity (C s ; mg/g) of ∼248 mg/g (Co;1000 mg/L) from an acidic medium at 1 M, whereas in the pH medium, it exhibited a saturation sorption of only about 35% at pH = 5 within 15 min. The bonding between Pd(II) species and the MOF sample along with the chemical environment before and after the adsorption of Pd(II) onto MOF was confirmed by FTIR and X-ray photoelectron spectroscopy. In addition, the inherent bonding mechanism between Pd(II) and the functional moiety (OSO) of MOF was studied by applying DFT calculations. The bonding mechanism between Pd(II) and Si@-UiO-66-SO3H is facilitated by complex formation via the monodentate coordination of the S = O group with Pd(II); in addition, hydrogen bonding also plays an important role. To get back the sorbed Pd(II) onto the surface of MOFs, it was analyzed by desorption studies. Desorption studies revealed that 1 M Na2CO3 has high recovery efficiency (∼70%) toward Pd(II) sorbed onto MOFs. This work provided the facile method for the extraction and removal of Pd(II) by a highly stable MOF for practical applications as well as environmental concerns.

show abstract

Sensors on low-dimensional silicon structures

Cited by 15 publications

References 4 publications

Separation of palladium from high level liquid waste – A review

Separation of palladium from high level liquid waste – A review

Palladium in Irradiated Fuel. Are There Any Prospects for Recovery and Application?

Ultrahigh Chemically Stable Silica-Embedded UiO-66-SO₃H MOF for the Efficient Recovery of Pd(II) from an Acidic Medium: Experimental and DFT Study

Contact Info

Product

Resources

About

Sensors on low-dimensional silicon structures

Cited by 15 publications

References 4 publications

Separation of palladium from high level liquid waste – A review

Separation of palladium from high level liquid waste – A review

Palladium in Irradiated Fuel. Are There Any Prospects for Recovery and Application?

Ultrahigh Chemically Stable Silica-Embedded UiO-66-SO3H MOF for the Efficient Recovery of Pd(II) from an Acidic Medium: Experimental and DFT Study

Contact Info

Product

Resources

About

Ultrahigh Chemically Stable Silica-Embedded UiO-66-SO₃H MOF for the Efficient Recovery of Pd(II) from an Acidic Medium: Experimental and DFT Study