TY - JOUR

T1 - Formation of admixed phase during microwave assisted Cu ion exchange in mordenite

AU - Bogdanov, Dmitrii S.

AU - Novikov, Roman G.

AU - Pestsov, Oleg S.

AU - Baranov, Denis A.

AU - Shelyapina, Marina G.

AU - Tsyganenko, Alexey A.

AU - Kasatkin, Igor A.

AU - Kalganov, Vladimir D.

AU - Silyukov, Oleg I.

AU - Petranovskii, Vitalii

N1 - Funding Information: The studies were carried out at the Research Park of Saint Petersburg State University: Centre for X-ray Diffraction Studies, Centre of Thermal Analysis and Calorimetry, Interdisciplinary Resource Centre for Nanotechnology, Centre for Diagnostics of Functional Materials for Medicine, Pharmacology and Nanoelectronics. This work was supported by RFBR and CITMA according to the research project No. 18-53-34004 . Publisher Copyright: © 2021 Elsevier B.V. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/3/1

Y1 - 2021/3/1

N2 - Emerging technologies aimed to tune properties of microporous materials, including zeolitic catalysts, involve microwave processing that accelerates chemical reactions and often increases efficiency of target materials. Here we report on the results of our comprehensive study of copper-exchanged mordenites obtained from sodium mordenite with Si/Al = 6.5 and CuSO4 solution using both conventional and microwave assisted ion-exchange procedures. The current study confirms that microwave irradiation not only enhance the ion exchange but also is accompanied by a chemical reaction resulting in formation of an antlerite admixed phase, which explains the over-exchange of copper ions. Fourier transform infrared studies evidence epitaxial growth of antlerite on the surface of mordenite particles. Annealing at 450 °C leads to the transformation of antlerite into mesoporous CuO. Altogether it suggests that the resulting composite material obtained by the microwave assisted ion-exchange procedure can be considered as a promising catalyst with several different types of active sites.

AB - Emerging technologies aimed to tune properties of microporous materials, including zeolitic catalysts, involve microwave processing that accelerates chemical reactions and often increases efficiency of target materials. Here we report on the results of our comprehensive study of copper-exchanged mordenites obtained from sodium mordenite with Si/Al = 6.5 and CuSO4 solution using both conventional and microwave assisted ion-exchange procedures. The current study confirms that microwave irradiation not only enhance the ion exchange but also is accompanied by a chemical reaction resulting in formation of an antlerite admixed phase, which explains the over-exchange of copper ions. Fourier transform infrared studies evidence epitaxial growth of antlerite on the surface of mordenite particles. Annealing at 450 °C leads to the transformation of antlerite into mesoporous CuO. Altogether it suggests that the resulting composite material obtained by the microwave assisted ion-exchange procedure can be considered as a promising catalyst with several different types of active sites.

KW - медь-обменные мордениты

KW - микроволновой ионообмен

KW - мезопористый CuO

KW - Copper-exchange mordenite

KW - FTIR

KW - Mesoporous CuO

KW - Microwave treatment

KW - XRD

UR - http://www.scopus.com/inward/record.url?scp=85099257753&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/eaaa2076-784e-3a36-a88f-2350a43689c9/

U2 - 10.1016/j.matchemphys.2021.124235

DO - 10.1016/j.matchemphys.2021.124235

M3 - Article

AN - SCOPUS:85099257753

VL - 261

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

SN - 0254-0584

M1 - 124235

ER -