A new bismuth potassium nitrate oxide, Bi 1.7K 0.9O 2(NO 3) 2: Synthesis, structure, thermal behavior, and photocatalytic properties

S. Shenawi-Khalil; V. Uvarov; D. O. Charkin; A. Goaz; I. Popov; V. A. Dolgikh; Y. Sasson

doi:10.1016/j.solidstatesciences.2011.11.017

A new bismuth potassium nitrate oxide, Bi _1.7K _0.9O ₂(NO ₃) ₂: Synthesis, structure, thermal behavior, and photocatalytic properties

S. Shenawi-Khalil
, V. Uvarov
, D. O. Charkin^*
, A. Goaz
, I. Popov
, V. A. Dolgikh
, Y. Sasson

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

We report here the first observation of a bismuth potassium nitrate Bi _1.7K _0.9O ₂(NO ₃) ₂, obtained via thermal decomposition of bismuth and potassium nitrate mixtures. The new compound is orthorhombic, space group Immm (71), Z = 2, with a = 3.8698(7) Å, b = 3.8703(7) , and c = 24.1271(4) . Its crystal structure was refined from powder X-ray diffraction data by analogy with the mineral beyerite, Bi ₂O ₂Ca(CO ₃) ₂. The morphology and elemental composition of Bi _1.7K _0.9O ₂(NO ₃) ₂ were characterized using scanning electron microscopy (SEM) with energy dispersive X-Ray spectroscopy (EDS). Its phase transformations upon heating and products of its thermal decomposition were studied using XRD, TGA and FTIR. At 440 °C, Bi _1.7K _0.9O ₂(NO ₃) ₂ transforms to another basic bismuth potassium nitrate with demonstrates a very similar XRD pattern but slightly larger cell parameters. At 520 °C, the intermediate oxide nitrate decomposes into a mixture of crystalline α-Bi ₂O ₃ and KNO ₃. The as prepared Bi _1.7K _0.9O ₂(NO ₃) ₂ showed lower than TiO ₂ (Degussa P25) photocatalytic activity upon decomposition of a widely used model pollutant, Rhodamine B (RhB) and photooxidation of potassium iodide under UV-vis light irradiation. Interaction with potassium iodide in alkaline media resulted in formation of Bi ₅O ₇I.

Original language	English
Pages (from-to)	159-165
Number of pages	7
Journal	Solid State Sciences
Volume	14
Issue number	1
DOIs	https://doi.org/10.1016/j.solidstatesciences.2011.11.017
State	Published - Jan 2012

Keywords

Bismuth potassium oxide nitrate
Crystal structure
Photocatalysis
Rietveld refinement
Sillén phases
Thermal decomposition

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10.1016/j.solidstatesciences.2011.11.017

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@article{e5d35b2288d64502801b1e0369a978fc,

title = "A new bismuth potassium nitrate oxide, Bi 1.7K 0.9O 2(NO 3) 2: Synthesis, structure, thermal behavior, and photocatalytic properties",

abstract = "We report here the first observation of a bismuth potassium nitrate Bi 1.7K 0.9O 2(NO 3) 2, obtained via thermal decomposition of bismuth and potassium nitrate mixtures. The new compound is orthorhombic, space group Immm (71), Z = 2, with a = 3.8698(7) {\AA}, b = 3.8703(7) , and c = 24.1271(4) . Its crystal structure was refined from powder X-ray diffraction data by analogy with the mineral beyerite, Bi 2O 2Ca(CO 3) 2. The morphology and elemental composition of Bi 1.7K 0.9O 2(NO 3) 2 were characterized using scanning electron microscopy (SEM) with energy dispersive X-Ray spectroscopy (EDS). Its phase transformations upon heating and products of its thermal decomposition were studied using XRD, TGA and FTIR. At 440 °C, Bi 1.7K 0.9O 2(NO 3) 2 transforms to another basic bismuth potassium nitrate with demonstrates a very similar XRD pattern but slightly larger cell parameters. At 520 °C, the intermediate oxide nitrate decomposes into a mixture of crystalline α-Bi 2O 3 and KNO 3. The as prepared Bi 1.7K 0.9O 2(NO 3) 2 showed lower than TiO 2 (Degussa P25) photocatalytic activity upon decomposition of a widely used model pollutant, Rhodamine B (RhB) and photooxidation of potassium iodide under UV-vis light irradiation. Interaction with potassium iodide in alkaline media resulted in formation of Bi 5O 7I.",

keywords = "Bismuth potassium oxide nitrate, Crystal structure, Photocatalysis, Rietveld refinement, Sill{\'e}n phases, Thermal decomposition",

author = "S. Shenawi-Khalil and V. Uvarov and Charkin, \{D. O.\} and A. Goaz and I. Popov and Dolgikh, \{V. A.\} and Y. Sasson",

year = "2012",

month = jan,

doi = "10.1016/j.solidstatesciences.2011.11.017",

language = "אנגלית",

volume = "14",

pages = "159--165",

journal = "Solid State Sciences",

issn = "1293-2558",

publisher = "Elsevier Masson s.r.l.",

number = "1",

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T1 - A new bismuth potassium nitrate oxide, Bi 1.7K 0.9O 2(NO 3) 2

T2 - Synthesis, structure, thermal behavior, and photocatalytic properties

AU - Shenawi-Khalil, S.

AU - Uvarov, V.

AU - Charkin, D. O.

AU - Goaz, A.

AU - Popov, I.

AU - Dolgikh, V. A.

AU - Sasson, Y.

PY - 2012/1

Y1 - 2012/1

N2 - We report here the first observation of a bismuth potassium nitrate Bi 1.7K 0.9O 2(NO 3) 2, obtained via thermal decomposition of bismuth and potassium nitrate mixtures. The new compound is orthorhombic, space group Immm (71), Z = 2, with a = 3.8698(7) Å, b = 3.8703(7) , and c = 24.1271(4) . Its crystal structure was refined from powder X-ray diffraction data by analogy with the mineral beyerite, Bi 2O 2Ca(CO 3) 2. The morphology and elemental composition of Bi 1.7K 0.9O 2(NO 3) 2 were characterized using scanning electron microscopy (SEM) with energy dispersive X-Ray spectroscopy (EDS). Its phase transformations upon heating and products of its thermal decomposition were studied using XRD, TGA and FTIR. At 440 °C, Bi 1.7K 0.9O 2(NO 3) 2 transforms to another basic bismuth potassium nitrate with demonstrates a very similar XRD pattern but slightly larger cell parameters. At 520 °C, the intermediate oxide nitrate decomposes into a mixture of crystalline α-Bi 2O 3 and KNO 3. The as prepared Bi 1.7K 0.9O 2(NO 3) 2 showed lower than TiO 2 (Degussa P25) photocatalytic activity upon decomposition of a widely used model pollutant, Rhodamine B (RhB) and photooxidation of potassium iodide under UV-vis light irradiation. Interaction with potassium iodide in alkaline media resulted in formation of Bi 5O 7I.

AB - We report here the first observation of a bismuth potassium nitrate Bi 1.7K 0.9O 2(NO 3) 2, obtained via thermal decomposition of bismuth and potassium nitrate mixtures. The new compound is orthorhombic, space group Immm (71), Z = 2, with a = 3.8698(7) Å, b = 3.8703(7) , and c = 24.1271(4) . Its crystal structure was refined from powder X-ray diffraction data by analogy with the mineral beyerite, Bi 2O 2Ca(CO 3) 2. The morphology and elemental composition of Bi 1.7K 0.9O 2(NO 3) 2 were characterized using scanning electron microscopy (SEM) with energy dispersive X-Ray spectroscopy (EDS). Its phase transformations upon heating and products of its thermal decomposition were studied using XRD, TGA and FTIR. At 440 °C, Bi 1.7K 0.9O 2(NO 3) 2 transforms to another basic bismuth potassium nitrate with demonstrates a very similar XRD pattern but slightly larger cell parameters. At 520 °C, the intermediate oxide nitrate decomposes into a mixture of crystalline α-Bi 2O 3 and KNO 3. The as prepared Bi 1.7K 0.9O 2(NO 3) 2 showed lower than TiO 2 (Degussa P25) photocatalytic activity upon decomposition of a widely used model pollutant, Rhodamine B (RhB) and photooxidation of potassium iodide under UV-vis light irradiation. Interaction with potassium iodide in alkaline media resulted in formation of Bi 5O 7I.

KW - Bismuth potassium oxide nitrate

KW - Crystal structure

KW - Photocatalysis

KW - Rietveld refinement

KW - Sillén phases

KW - Thermal decomposition

UR - https://www.scopus.com/pages/publications/83555173580

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DO - 10.1016/j.solidstatesciences.2011.11.017

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AN - SCOPUS:83555173580

SN - 1293-2558

VL - 14

SP - 159

EP - 165

JO - Solid State Sciences

JF - Solid State Sciences

IS - 1

ER -

A new bismuth potassium nitrate oxide, Bi _1.7K _0.9O ₂(NO ₃) ₂: Synthesis, structure, thermal behavior, and photocatalytic properties

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