Abstract
Photocatalysts are environmentally friendly materials that can be used to degrade vehicle exhaust. CeO2–Bi2O3 loaded on white carbon and tourmaline, as the favorable absorption materials, was prepared respectively for vehicle exhaust photocatalytic purification. Brunauer-Emmett-Teller (BET) adsorption isotherm, scanning electron microscope (SEM), Fourier transform infrared (FTIR), X-ray diffraction (XRD), transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS) were applied to characterize the composite materials. The optimum contents of the loading materials were obtained from the comparison of purification efficiency of vehicle exhaust components after a 60-min photocatalytic reaction under visible and ultraviolet (UV) irradiation, including hydrocarbons (HC), carbon monoxide (CO), carbon dioxide (CO2), and nitrogen oxides (NOx). The results show that the proposed preparation method could improve particle dispersion and distribution uniformity, reduce particle agglomeration, and increase specific surface area. The optical response range of the CeO2–Bi2O3 with loading materials can be extended from UV light to visible light. CeO2–Bi2O3 loaded on tourmaline show excellent photocatalytic purification effect under visible light. The purification efficiency of CeO2–Bi2O3 loaded on tourmaline for HC, CO, CO2, and NOx were 30.8%, 30.6%, 35.3%, and 47.6%, respectively. Moreover, the concentrations of vehicle exhaust components decrease with time, which is well fitted by the Langmuir-Hinshelwood pseudo-first-order kinetics model, and the purification rate constant of CeO2–Bi2O3 composites under visible light is greater than that under UV light. The prepared photocatalytic materials also exhibit the excellent reusability.
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Funding
This research was supported by the National Natural Science Foundation of China (51978068), the Department of Science & Technology of Shaanxi Province (2020JM-217), the Special Fund for Basic Scientific Research of Central College of Chang’an University (310821173501), the Qinghai Science and Technology Achievement Transformation Project (2017-SF-134), and the Special Fund for Basic Scientific Research of Central College of Chang’an University (300102217724).
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Yanqiu Bi: methodology, investigation, writing—original draft preparation. Rui Li: supervision. Fucheng Guo: resources, data curation, writing—reviewing and editing. Chundong Zhu: writing—reviewing and editing, visualization. Jianzhong Pei: conceptualization, formal analysis, supervision.
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Bi, Y., Li, R., Guo, F. et al. Photocatalytic purification of vehicle exhaust using CeO2–Bi2O3 loaded on white carbon and tourmaline. Environ Sci Pollut Res 28, 17724–17738 (2021). https://doi.org/10.1007/s11356-020-11899-2
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DOI: https://doi.org/10.1007/s11356-020-11899-2