Röntgenanalyse des Chrom—Stickstoffsystems nebst einer orientierenden Konstitutionsuntersuchung des stickstoffhaltigen Ferrochroms

Blix, Ragnar

doi:10.1515/zpch-1929-0317

Cited by 40 publications

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“…The high intensity peaks at the angle of 2θ represents good crystalline quality on Bio-MOF Cr-CA since the amorphous material will not produce sharp consistent peaks. Several sharp peaks were observed at the angles of 19 o ,29 o , and 34 o having the same spectrum with other chromium nitrate as the metal constituent of the MOFs 24) . The peaks at 24 o and 39 o represent the citric acid ligand in Bio-MOF with the same intensity in several reported MOFs using citric acid bio-ligand 25,26) .…”

Section: Resultsmentioning

confidence: 74%

Preliminary Study of Bio-Metal Organic Frameworks (Bio-MOFs) Based Chromium-Citric Acid for CO_2 Adsorption Application

Pratiwi¹,

Nasruddin²,

Zulys³

et al. 2021

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According to the Intergovernmental Panel on Climate Change (IPCC), carbon dioxide (CO 2 ) gas is one of the significant factors that caused climate change. In the IPCC's special report regarding Carbon Dioxide Capture and Storage, there was discussion about several technologies for CO 2 gas capture. One of the technologies is using solid sorbent such as activated carbon, silica, metal oxides, and zeolite. Recently, there has been a significant increase in the research of Metal Organic Frameworks (MOFs) which are believed to be the most promising adsorbent in CO 2 adsorption application. It is a crystalline type of porous material consisting of the metal ions and the organic ligands. With all the advantages possessed by MOFs, these adsorbents are still difficult to be applied on industrial scale due to high fabrication cost. Composed of non-renewable feedstock raw materials, some MOFs are not environmentally friendly. To quickly response this challenge, we conducted investigation on the use of biologically derived MOF (Bio-MOF) in CO 2 capture application. A novel of Bio-MOF Chromium-Citric Acid (Cr-CA) has been explored. The synthesis process is carried out through the hydrothermal reaction method using eco-friendly solvent potassium hydroxide and Aquabidest. The characterization of MOF was carried out by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD) testing, scanning electron microscope (SEM), thermal gravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR) analysis. We would like to recommend that research about MOF with Chromium-Citric Acid content is conducted and investigated further on the performance of gas adsorption with this porous material.

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Section: Resultsmentioning

confidence: 74%

Preliminary Study of Bio-Metal Organic Frameworks (Bio-MOFs) Based Chromium-Citric Acid for CO_2 Adsorption Application

Pratiwi¹,

Nasruddin²,

Zulys³

et al. 2021

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“…Especially the results of the CHARDI concept fit very well, with adeviation for the cations of only 0.2 %a nd 0.5 %f or the anions. Furthermore,M APLE calculations (Madelung Part of Lattice Energy) [26] were performed on CrB 4 O 6 N, and compared to the result from the theoretical values of the binary starting materials CrN [27] and the high-pressure modification B 2 O 3 -II. [28] Due to the additive potential of MAPLE values,ahypothetical value for CrB 4 O 6 Nc an be calculated.…”

Section: Resultsmentioning

confidence: 99%

The First High‐Pressure Chromium Oxonitridoborate CrB₄O₆N—an Unexpected Link to Nitridosilicate Chemistry

et al. 2021

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CrB4O6N crystallizes in the non‐centrosymmetric space group P63mc (no. 186) with the lattice parameters a=5.1036(1), c=8.3519(3) Å, and a volume of 188.40(1) Å3. It was synthesized in a high‐pressure/high‐temperature experiment at 7 GPa and 1673 K and represents the first high‐pressure oxonitridoborate. It is built up of starlike‐shaped entities of four BO3N tetrahedra, connected via one common nitrogen atom that resembles the fourfold‐coordinated nitrogen atoms in the homeotypic nitridosilicates MYbSi4N7 (M=Sr, Ba). Building up a network with channels that contain the Cr3+ ions, CrB4O6N contains for the first time a tetrahedral building unit in contrast to trigonal planar B(O/N)3 entities in all other known oxonitridoborates. The structural relations as well as the results of spectroscopic measurements and calculations on the chromium oxonitridoborate are discussed.

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“…Als weitere Bestätigung der Kristallstruktur und der Oxidationszahlen wurden BL/BS (bond-length/bondstrength; AEV) [24] und CHARDI (Charge distribution; AEQ) [25] Berechnungen durchgeführt. Die Ergebnisse sind in Tabelle 2 gelistet und stimmen gut mit den erwarteten Werten von + 3 fürC hrom und Bor, À2f ürS auerstoff und À3f ürS tickstoff [26] fürC rB 4 O 6 Nb erechnet und mit dem theoretischen Ergebnis ausgehend von den binären Edukten CrN [27] und der Hochdruckmodifikation B 2 O 3 -II verglichen. [28] Dies ist aufgrund der additiven Potenziale von MAPLE-Werten mçglich.…”

Section: Ergebnisse Und Diskussionunclassified

Das erste Hochdruck‐Chromoxonitridoborat CrB₄O₆N – ein unerwartetes Bindeglied zur Chemie der Nitridosilikate

et al. 2021

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CrB4O6N kristallisiert in der nicht‐zentrosymmetrischen Raumgruppe P63mc (Nr. 186) mit den Gitterparametern a=5.1036(1), c=8.3519(3) Å und einem Volumen von 188,40(1) Å3. Synthetisiert durch ein Hochdruck‐/Hochtemperaturexperiment bei 7 GPa und 1673 K, repräsentiert die Phase das erste Hochdruck‐Oxonitridoborat. Strukturell zeigen sich sternförmige Einheiten bestehend aus vier BO3N‐Tetraedern, die in Analogie zu den homeotypen Nitridosilikaten MYbSi4N7 (M=Sr, Ba, Eu) durch ein gemeinsames vierfach koordiniertes Stickstoffatom miteinander verknüpft sind. Diese Einheiten bilden ein Netzwerk aus, in dessen Kanälen die Cr3+‐Ionen liegen. Im Gegensatz zu den trigonal‐planaren B(O/N)3‐Einheiten in allen anderen bekannten Oxonitridoboraten zeigt CrB4O6N erstmals tetraedrische Baueinheiten. Die strukturellen Zusammenhänge sowie die Ergebnisse der spektroskopischen Messungen und theoretischen Rechnungen am Chromoxonitridoborat werden im Folgenden erörtert.

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Röntgenanalyse des Chrom—Stickstoffsystems nebst einer orientierenden Konstitutionsuntersuchung des stickstoffhaltigen Ferrochroms

Cited by 40 publications

References 0 publications

Preliminary Study of Bio-Metal Organic Frameworks (Bio-MOFs) Based Chromium-Citric Acid for CO_2 Adsorption Application

Preliminary Study of Bio-Metal Organic Frameworks (Bio-MOFs) Based Chromium-Citric Acid for CO_2 Adsorption Application

The First High‐Pressure Chromium Oxonitridoborate CrB₄O₆N—an Unexpected Link to Nitridosilicate Chemistry

Das erste Hochdruck‐Chromoxonitridoborat CrB₄O₆N – ein unerwartetes Bindeglied zur Chemie der Nitridosilikate

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Röntgenanalyse des Chrom—Stickstoffsystems nebst einer orientierenden Konstitutionsuntersuchung des stickstoffhaltigen Ferrochroms

Cited by 40 publications

References 0 publications

Preliminary Study of Bio-Metal Organic Frameworks (Bio-MOFs) Based Chromium-Citric Acid for CO_2 Adsorption Application

Preliminary Study of Bio-Metal Organic Frameworks (Bio-MOFs) Based Chromium-Citric Acid for CO_2 Adsorption Application

The First High‐Pressure Chromium Oxonitridoborate CrB4O6N—an Unexpected Link to Nitridosilicate Chemistry

Das erste Hochdruck‐Chromoxonitridoborat CrB4O6N – ein unerwartetes Bindeglied zur Chemie der Nitridosilikate

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The First High‐Pressure Chromium Oxonitridoborate CrB₄O₆N—an Unexpected Link to Nitridosilicate Chemistry

Das erste Hochdruck‐Chromoxonitridoborat CrB₄O₆N – ein unerwartetes Bindeglied zur Chemie der Nitridosilikate