Investigation of factors affecting the BET specific surface area of hopcalite prepared via the co-precipitation method
DOI:
https://doi.org/10.62239/jca.2026.046Keywords:
Catalysis, hopcalite, CuMnOx, carbon monoxide, adsorption, BET specific surface area, SEM, XRDAbstract
Hopcalite (CuMnOx) is a catalytic material capable of oxidizing CO at low temperatures, in which the specific surface area is one of the important parameters affecting catalytic activity. This study investigates the effects of the Cu:Mn molar ratio, pH value, precipitating agent combined with PEG and ultrasonication, as well as calcination temperature on the BET specific surface area of hopcalite prepared by the co-precipitation method. The materials were characterized by BET, SEM, and XRD. The results show that the specific surface area increased with increasing Mn content and reached a maximum value of 108 m²/g at a Cu:Mn molar ratio of 1:8. A pH of 8.5, the use of Na₂CO₃ combined with PEG and ultrasonication, drying at 110 °C for 24 h, and calcination at 350 °C for 3 h were the optimal conditions for obtaining the material with the highest specific surface area. SEM results showed that the optimized sample possessed a well-developed porous nanostructure, while XRD analysis confirmed that the material consisted of two main crystalline phases, CuO and MnO₂.
Downloads
References
K. Narasimharao, A. Al-Shehri, S. Al-Thabaiti, Appl. Catal. A Gen., 505 (2015) 431-440. https://doi.org/10.1016/j.apcata.2015.05.017
K. Qian, Z. Qian, Q. Hua, Z. Jiang, W. Huang, Appl. Surf. Sci., 273 (2013) 357-363. https://doi.org/10.1016/j.apsusc.2013.02.043
G.J. Hutchings, A.A. Mirzaei, R.W. Joyner, M.R.H. Siddiqui, S.H. Taylor, Appl. Catal. A Gen., 166(1) (1998) 143-152. https://doi.org/10.1016/S0926-860X(97)00248-2
G. Rattan, R. Prasad, R.C. Katyal, Bull. Chem. React. Eng. Catal., 7(2) (2012) 112-123. https://doi.org/10.9767/bcrec.7.2.3646.112-123
C. Liang, Y. Sun, P. Li, Y. Jiang, X. Sun, Z. Yang, Catalysts, 15(4) (2025) 0353. https://doi.org/10.3390/catal15040353
E.C. Njagi, C.H. Chen, H. Genuino, H. Galindo, H. Huang, S.L. Suib, Appl. Catal. B Environ., 99(1-2) (2010) 103-110. https://doi.org/10.1016/j.apcatb.2010.06.006
S. Dey, G.C. Dhal, Aerosol Sci. Eng., 3(4) (2019) 97-131. https://doi.org/10.1007/s41810-019-00046-1
L.N. Cai, Y. Guo, A.H. Lu, P. Branton, W.C. Li, J. Mol. Catal. A Chem., 360 (2012) 35-41. https://doi.org/10.1016/j.molcata.2012.04.003
M. Wojciechowska, W. Przystajko, M. Zieliński, Catal. Today, 119(1-4) (2007) 338-341. https://doi.org/10.1016/j.cattod.2006.08.035
T.J. Clarke, T.E. Davies, S.A. Kondrat, S.H. Taylor, Appl. Catal. B Environ., 165 (2015) 222-231. https://doi.org/10.1016/j.apcatb.2014.09.070
J.P. Ngorot Kembo, J. Wang, N. Luo, F. Gao, H. Yi, S. Zhao, Y. Zhou, X. Tang, New J. Chem., 47(44) (2023) 20222-20247. https://doi.org/10.1039/d3nj03074a
S. Dey, N.S. Mehta, Appl. Energy Combust. Sci., 6 (2021) 100031. https://doi.org/10.1016/j.jaecs.2021.100031
S. Dey, G.C. Dhal, D. Mohan, R. Prasad, Adv. Compos. Hybrid Mater., 3(1) (2020) 84-97. https://doi.org/10.1007/s42114-020-00139-3
M.D. Donohue, G.L. Aranovich, J. Colloid Interface Sci., 205(1) (1998) 121-130. https://doi.org/10.1006/jcis.1998.5639
X. Fan, S. Ma, M. Gan, Z. Ji, Z. Sun, L. Liu, Chem. Eng. J., 484 (2024) 149636. https://doi.org/10.1016/j.cej.2024.149636
S. Dey, N.S. Mehta, Resour. Environ. Sustain., 4 (2021) 100025. https://doi.org/10.1016/j.resenv.2021.100025
M. Sadeghinia, M. Rezaei, E. Amini, Korean J. Chem. Eng., 30(11) (2013) 2012-2016. https://doi.org/10.1007/S11814-013-0141-5
Downloads
Published
Data Availability Statement
The authors conducted the research at the Institute of Military Environmental Chemistry and the College of Chemical Defense Officers. The research results presented in this manuscript were obtained by the authors and have been published exclusively in the Vietnam Journal of Adsorption and Catalysis. The authors declare that there are no disputes regarding authorship or ownership of the research work
Issue
Section
License
Copyright (c) 2026 Nguyen Thanh Binh, Nguyen Xuan Toan, Phung Khac Huy Chu, Nguyen Minh Duc
This work is licensed under a Creative Commons Attribution 4.0 International License.
How to Cite
