Assessment of the Synergetic Performance of Nanostructured CeO2-SnO2/Al2O3 Mixed Oxides on Automobile Exhaust Control

• Published in: Materials Vol. 15; no. 23; p. 8460
• Main Authors: Jayachandran, Varuna, Dhandapani, Vishnu Shankar, Muniappan, Elango, Park, Dongkyou, Kim, Byungki, Arun, A. P., Ayyappan, P. R.
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 28-11-2022; MDPI
• Subjects: Air pollution; Aluminum oxide; Catalytic converters; Cerium oxides; Composite materials; Compression ratio; Emission analysis; Emissions control; Ethanol; Exhaust emission; High resolution electron microscopy; Mixed oxides; Nanoparticles; Nitrates; Photoelectrons; Raman spectroscopy; Sintering; Stainless steels; Tin dioxide; X ray photoelectron spectroscopy; India
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma15238460

In order to control diesel exhaust emission, CeO2-SnO2/Al2O3 (CTA) mixed oxides were prepared and coated on perforated stainless steel (SS) filter plates, and the catalytic activities were analyzed in this work. The CeO2-SnO2 (different compositions of Ce/Sn—2:8; 1:1; 8:2) composites and Al2O3 were prepared separately via a co-precipitation approach, and CeO2-SnO2/Al2O3 (CTA) mixed oxides were attained by mechanical mixing of 75 wt% CeO2-SnO2 composites with 25 wt% Al2O3. X-ray diffraction (XRD) and Raman spectroscopy were performed for all three CeO2-SnO2/Al2O3 (CTA) mixed oxides; the CeO2-SnO2/Al2O3 (Ce/Sn-1:1) sample confirmed the presence of cubic and tetragonal mixed faces, which enhances the redox nature (catalytic activities). Various characterizations such as high-resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller (BET) analysis, X-ray photoelectron spectroscopy (XPS), and a scanning electron microscope (SEM) were employed on CeO2-SnO2/Al2O3 (Ce/Sn-1:1) sample to investigate the structural, textural, compositional, and morphological properties. The CeO2-SnO2/Al2O3 (Ce/Sn-1:1) sample was coated on a perforated stainless steel (SS) filter plate via a simple, cost-effective, and novel method, and an exhaust emission test for various compression ratios (CR), injection pressure (IP), and load (L) was completed using an AVL Digas analyzer. The CeO2-SnO2/Al2O3 (Ce/Sn-1:1) sample, with a size of 10.22 nm and a high surface area of about 73 m2 g−1, exhibit appreciable catalytic properties.