Heterojunction g-C3N4/CeO2/Bi2O3 composite for the photocatalytic purification of exhaust gas

Cui, Shengchao; Ma, Qingna; Chen, Heng; Zhang, Yunqiang; Sun, Feng

doi:10.1016/j.matchemphys.2022.126081

Cited by 8 publications

(5 citation statements)

References 45 publications

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“…The particle size of the CeO2 nanocrystals ranged between 20 and 40 nm. The magnified elected area at a high resolution (Figure 2b) confirmed the face-centered cubic phase of CeO2 owing to the d-spacing measurement of 0.31 nm representing the (111) plane [46]. The Bi2O3loading of CeO2 revealed certain changes to the structure and morphology as seen in Fig- ure 2c-h.…”

Section: Structural Surface and Optical Investigations Of The Produce...mentioning

confidence: 55%

“…The Ce 3d spectrum (Figure 4b) was deconvoluted into the coexisting minority Ce 3+ and the majority of Ce 4+ [44]. The Ce 3+ is located at 902.1 and 886.5 for 3d 3/2 and 3d 5/2 orbitals [46]. On the other hand, the major peaks located at 917.2, 908.2, and 898.7 eV are attributed to the 3d 3/2 binding of Ce 4+ while the binding energies positioned at 890.2 and 883.1 eV correspond to the 3d 5/2 of Ce 4+ in CeO 2 .…”

Section: Structural Surface and Optical Investigations Of The Produce...mentioning

confidence: 99%

“…Moreover, CeO 2 has narrower E g (2.8~3.1 eV) than TiO 2 and ZnO, exhibiting an n-type character and representing a more stable ceramic oxide with potential applications in various photocatalytic reactions, including water splitting [42], organic transformation reactions [43], and pollutant degradation [44]. Moreover, the coupling with p-type oxides such as bismuth oxides (Bi 2 O 3 ) showed a significant photocatalytic performance in dye degradation [37,45], self-cleaning coatings [46], and NO oxidation [47]. In a recent study performed by Yang et al, the β-Bi 2 O 3 -loaded CeO 2 heterostructure photocatalyst exhibited a significant redox for the oxidation of stable antibiotic molecules due to the enhanced charge separation of the added β-Bi 2 O 3 in the heterojunction system [48].…”

Section: Introductionmentioning

confidence: 99%

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Visible-Light-Driven CO2 Reduction into Methanol Utilizing Sol-Gel-Prepared CeO2-Coupled Bi2O3 Nanocomposite Heterojunctions

et al. 2022

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Carbon dioxide (CO2) photoreduction into renewable fuels over semiconductor photocatalysts has emerged as a green and sustainable alternative for energy production. Consequently, tremendous efforts are being performed to develop robust and sustainable photocatalysts. Therefore, visible-light active nanocomposite photocatalysts composed of 5.0–20.0 wt.% bismuth oxide (Bi2O3) and cerium oxide (CeO2) were synthesized by a sol-gel-based process. The prepared nanocomposites were evaluated for the promoted photocatalytic reduction of CO2 into methanol (CH3OH). Various characterizations of the obtained photocatalysts exposed an outstanding development of crystalline structure, morphology, and surface texture due to the presence of Bi2O3. Moreover, the absorbance of light in the visible regime was improved with enhanced charge separation, as revealed by the exploration of optical response, photoluminescence, and photocurrent measurements. The overall bandgap calculations revealed a reduction to 2.75 eV for 15% Bi2O3/CeO2 compared to 2.93 eV for pure CeO2. Moreover, the adjusted 2.8 g L−1 dose of 15% Bi2O3/CeO2 selectively produced 1300 μmol g−1 CH3OH after 9 h of visible light irradiation. This photocatalyst also exhibits bearable reusability five times. The improved progression of 15% Bi2O3/CeO2 is denoted by significant charge separation as well as enhanced mobility. This study suggests the application of metal oxide-based heterojunctions for renewable fuel production under visible light.

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Section: Structural Surface and Optical Investigations Of The Produce...mentioning

confidence: 55%

Section: Structural Surface and Optical Investigations Of The Produce...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Visible-Light-Driven CO2 Reduction into Methanol Utilizing Sol-Gel-Prepared CeO2-Coupled Bi2O3 Nanocomposite Heterojunctions

et al. 2022

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“…In recent years, the main purpose of qualitative–quantitative measurements in research on exhaust gas emissions conducted around the world is the testing of driving cycles under real traffic conditions. , In addition, the studies are focused on testing new fuel mixtures , and systems of exhaust gas treatment. , Many publications also describe tests aiming to confirm compliance with emission standards . The researchers less frequently focus on secondary emissions of toxic compounds .…”

Section: Exhaust Emission Test Methodsmentioning

confidence: 99%

“… 23 , 24 In addition, the studies are focused on testing new fuel mixtures 25 , 26 and systems of exhaust gas treatment. 27 , 28 Many publications also describe tests aiming to confirm compliance with emission standards. 29 The researchers less frequently focus on secondary emissions of toxic compounds.…”

Section: Exhaust Emission Test Methodsmentioning

confidence: 99%

The Actual Toxicity of Engine Exhaust Gases Emitted from Vehicles: The Development and Perspectives of Biological and Chemical Measurement Methods

Kęska

2023

ACS Omega

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Most of the current studies on vehicle engine exhaust emissions are focused on qualitative and quantitative measurements. Approval tests for admitting vehicles to traffic and tests performed at vehicle inspection stations are limited to measuring the concentrations of individual compounds or selected groups of compounds. For vehicles with compression-ignition engines, the annual emission control comprises only an exhaust gas opacity test, performed with an opacimeter. This approach does not consider very harmful groups of compounds that determine the toxicity of exhaust gases but are not directly covered by the emission standards, such as polycyclic aromatic hydrocarbons and volatile organic compounds. Also, it does not provide a clear answer to the question of the actual toxicity of exhaust gases, understood as the harmful effect that a given substance causes on living organisms or biological processes. Studies on the actual toxicity of engine exhaust gases present a new area of interest, increasingly more discussed but still not approached in a comprehensive way. The studies include experiments using in vitro biological methods and chemical analyses of gas mixtures. In this Review, I present an overview of current research and a critical comparison of commonly used methods of testing engine exhaust emissions and methods that might supplement them in a significant manner. The development of in vitro biological methods, including methods of microscopic analysis of cells in the assessment of exhaust gas toxicity, provides an innovative approach to the problem of air pollution. This type of research presents the opportunity to indisputably answer the question of the actual toxicity of a given gas mixture and to make a new contribution to science in the field of molecular biology. Current data show that the survival of cells exposed to engine exhaust emissions from older generation vehicles is higher compared to that of newer generation vehicles.

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CuO-coupled CeO2 nanocubes: simple preparation and efficient visible-light mineralization of atrazine with considerable reusability

Alanazi

Alhaddad

Shawky

et al. 2023

J Mater Sci: Mater Electron

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Heterojunction g-C3N4/CeO2/Bi2O3 composite for the photocatalytic purification of exhaust gas

Cited by 8 publications

References 45 publications

Visible-Light-Driven CO2 Reduction into Methanol Utilizing Sol-Gel-Prepared CeO2-Coupled Bi2O3 Nanocomposite Heterojunctions

Visible-Light-Driven CO2 Reduction into Methanol Utilizing Sol-Gel-Prepared CeO2-Coupled Bi2O3 Nanocomposite Heterojunctions

The Actual Toxicity of Engine Exhaust Gases Emitted from Vehicles: The Development and Perspectives of Biological and Chemical Measurement Methods

CuO-coupled CeO2 nanocubes: simple preparation and efficient visible-light mineralization of atrazine with considerable reusability

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