| Title: | Effects of gas phase composition on competitive adsorption properties of formaldehyde on titanium dioxide-supported platinum in single and mixture compositions |
| Author(s): | Hua Y; Verma S; Younis SA; Heynderickx PM; Kim KH; |
| Address: | "Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, Republic of Korea. Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, Republic of Korea; Analysis and Evaluation Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo 11727, Egypt. Center for Environmental and Energy Research (CEER) - Engineering of Materials via Catalysis and Characterization, Ghent University Global Campus, 119-5 Songdomunhwa-Ro, Yeonsu-Gu, Incheon 406-840, South Korea; Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent B-9000, Belgium. Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, Republic of Korea. Electronic address: kkim61@hanyang.ac.kr" |
| DOI: | 10.1016/j.scitotenv.2023.163924 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Titanium dioxide-supported platinum (Pt@TiO(2)) is regarded as a highly efficient photothermal catalyst to degrade various volatile organic compounds (VOCs). To learn more about the hybrid adsorption/catalysis process of VOCs on Pt@TiO(2), their dynamic adsorption behavior on the catalyst surface was studied using the single and multicomponent gas phase of FA (i.e., the latter with four aromatic compounds of benzene, toluene, m-xylene, and styrene (BTXS)) through the control of key operating variables (e.g., VOCs concentration, relative humidity (RH) levels, and dosage). According to the performance evaluation, the doping of TiO(2) with Pt metal ions significantly enhanced the FA adsorption capacity (e.g., by 50 % higher than the pristine TiO(2)) with increased OH (O(II)) surface active sites (reactivity) and surface porosity. However, in the co-presence of BTXS and water vapor, the adsorption affinity for FA vapor declined by 2 to 3 folds of magnitude with a competitive inhibition of the adsorption interaction on the Pt@TiO(2) surface. According to the kinetic and isotherms analysis, a complex, multilayered physicochemical process appears to govern the adsorption of FA molecules onto Pt@TiO(2) surface. Overall, the outcomes of this work are helpful to verify the enhanced removal potential of Pt@TiO(2) against FA through sequential adsorption and catalytic reaction mechanisms" |
| Keywords: | *Platinum Adsorption Toluene Titanium/chemistry Catalysis Formaldehyde *Volatile Organic Compounds Competitive adsorption mechanism Gaseous formaldehyde Platinum metal catalyst Titanium oxide (TiO(2)) Volatile organic compounds (VOCs); |
| Notes: | "PubMed-not-MEDLINEHua, Yongbiao Verma, Swati Younis, Sherif A Heynderickx, Philippe M Kim, Ki-Hyun eng Netherlands 2023/06/03 Sci Total Environ. 2023 Sep 20; 892:163924. doi: 10.1016/j.scitotenv.2023.163924. Epub 2023 Jun 1" |
