Mechanical ball-milling preparation and superior photocatalytic NO elimination of Z-scheme Bi12SiO20-based heterojunctions with surface oxygen vacancies

Chang, Fei; Yang, Cheng; Zhao, Shanshan; Wang, Jielin; Yang, Weiping; Dong, Fan; Zhu, Gangqiang; Kong, Yuan

doi:10.1016/j.jclepro.2022.135167

Cited by 27 publications

(10 citation statements)

References 54 publications

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“…Ball milling has been proven to be an efficient approach to increase the surface oxygen vacancy content of metal oxides . Due to friction, shear, collision force, and high interface temperature through solid–solid contact, ball milling can generate small particles with surface oxygen vacancies . Therefore, we attempted a facile pretreatment approach of ball milling to produce more oxygen vacancies on the surface of CeO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…38 Due to friction, shear, collision force, and high interface temperature through solid−solid contact, ball milling can generate small particles with surface oxygen vacancies. 39 Therefore, we attempted a facile pretreatment approach of ball milling to produce more oxygen vacancies on the surface of CeO 2 . As shown in Figure 2a, the original CeO 2 could degrade TBP with a phosphorus immobilization efficiency (I P ) of 95.6%, which was already a good result compared with MnO 2 -catalyzed TBP degradation.…”

Section: Effects Of Typical Reaction Parameters On the Degradation An...mentioning

confidence: 99%

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Treatment of Organophosphorus Esters Waste by CeO₂: Efficient Degradation with Simultaneous Phosphorus Immobilization

Wang,

Zheng,

Tong

et al. 2023

Ind. Eng. Chem. Res.

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Organophosphorus esters (OPEs) are important chemicals functioning as extractants, plasticizers, flame retardants, solvents, additives, etc., and are also recognized as hazardous organic liquids generated from industrial processes. Herein, we developed a CeO2-catalyzed degradation with simultaneous phosphorus immobilization technology to treat typical OPE solvents. Under the investigated reaction conditions of a temperature of 180 °C, a reaction time of 3 h, and a dosage of ball-milled CeO2 of 19.8 g mL–1 of the OPE, the model pollutant of tributyl phosphate (TBP) was efficiently degraded with phosphorus immobilization efficiency near 100%. Meanwhile, the mineralization efficiency of TBP was also as high as 98%, which was reflected by the chemical oxygen demand change of liquid products. Gaseous products generated from CeO2-catalyzed TBP degradation could also fulfill the requirements of an environmental standard. Further mechanism studies indicated that the surface oxygen vacancy in CeO2 induced the in situ formation of superoxide radicals, which dominated TBP degradation. During catalytic degradation, the P-containing species were mainly immobilized as cerium phosphate, while the hydrocarbon chains of TBP were degraded into small molecules and finally mineralized into inorganic species. The developed CeO2-catalyzed OPE degradation approach was also applicable to aromatic and halogenated OPEs, i.e., tricresyl phosphate and tris(2-chloroethyl) phosphate. This study provided a possible alternative for waste treatment of the waste of OPEs with low environmental risks.

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Section: Resultsmentioning

confidence: 99%

Section: Effects Of Typical Reaction Parameters On the Degradation An...mentioning

confidence: 99%

Treatment of Organophosphorus Esters Waste by CeO₂: Efficient Degradation with Simultaneous Phosphorus Immobilization

Wang,

Zheng,

Tong

et al. 2023

Ind. Eng. Chem. Res.

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“…A mechanism was proposed for the water splitting reaction according to the formation of the Z -scheme heterojunction between gold with NC and CoPc (Scheme ). , CoPc and NC generate electron/hole pairs with the irradiation, where the produced electrons were transferred onto the gold NPs, and holes were consumed in the evolution of the O 2 evolution. Creation of a Z -scheme type heterojunction elevates the reaction rate since the moving electrons onto gold NPs prevent them from charge recombination.…”

Section: Resultsmentioning

confidence: 99%

Chitosan-Derived Nitrogen-Doped Carbon as a Support of Cobalt(II)-Phthalocyanine/Gold Nanoparticles for Photocatalytic Water Splitting

Keshipour,

Eyvari-Ashnak

2023

ACS Omega

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Water splitting is considered one of the worthy approaches to generate hydrogen as a green fuel with diverse applications. Promoting this reaction with the photocatalytic strategy enjoys a free source of solar energy, without the use of expensive instruments. In this research, gold nanoparticles and cobalt(II)-phthalocyanine were deposited on nitrogen-doped carbon, obtained from chitosan, to afford a photocatalytic water splitting at the rate of 792 mol mol Au −1 h −1 . Gold as the catalyst in contact with cobalt(II)phthalocyanine as the sensitizer and nitrogen-doped carbon as the support/ semiconductor provided a desired heterojunction for the photocatalytic purpose. The nanocomposite showed remarkable light harvesting in the region of visible light with a band gap of 2.01 eV. While a facile protocol to the synthesis of the mentioned photocatalyst by a simple thermal treatment of cobalt(II)-phthalocyanine and chitosan could be invaluable, this research pointed out the significance of cobalt(II)-phthalocyanine as the sensitizer in the gold photocatalytic transformations.

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“…As shown in Figure S5 , the PL intensity of the radiative recombination through deep defect states in samples ZNP 2 and ZNP 4 reached a minimum value, indicating a reduced concentration of defects in the volume and surface of these ZnO samples. Accordingly, the lifetime of the photogenerated free carriers was longer in such samples, which could be the main reason for their higher photocatalytic activity [ 47 , 48 ]. It is worth noting that the ZNP 2 and ZNP 4 were in line with the best ZnO photocatalysts for similar functions, as shown in Table S3 .…”

Section: Resultsmentioning

confidence: 99%

Morphology Effects on Electro- and Photo-Catalytic Properties of Zinc Oxide Nanostructures

Kedruk,

Contestabile,

Zeng

et al. 2023

Nanomaterials

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Environmental problems are among the most pressing issues in the modern world, including the shortage of clean drinking water partially caused by contamination from various industries and the excessive emission of CO2 primarily from the massive use of fossil fuels. Consequently, it is crucial to develop inexpensive, effective, and environmentally friendly methods for wastewater treatment and CO2 reduction, turning them into useful feedstocks. This study explores a unique method that addresses both challenges by utilizing ZnO, which is recognized as one of the most active semiconductors for photocatalysis, as well as a cost-effective electrocatalyst for the CO2 reduction reaction (CO2RR). Specifically, we investigate the influence of the morphology of various ZnO nanostructures synthesized via different low-cost routes on their photocatalytic properties for degrading the rhodamine-B dye (RhB) and on their electrocatalytic performance for the CO2RR. Our results show that the ZnO lamella morphology achieves the best performance compared to the nanorod and nanoparticle structures. This outcome is likely attributed to the lamella’s higher aspect ratio, which plays a critical role in determining the structural, optical, and electrical properties of ZnO.

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Mechanical ball-milling preparation and superior photocatalytic NO elimination of Z-scheme Bi12SiO20-based heterojunctions with surface oxygen vacancies

Cited by 27 publications

References 54 publications

Treatment of Organophosphorus Esters Waste by CeO₂: Efficient Degradation with Simultaneous Phosphorus Immobilization

Treatment of Organophosphorus Esters Waste by CeO₂: Efficient Degradation with Simultaneous Phosphorus Immobilization

Chitosan-Derived Nitrogen-Doped Carbon as a Support of Cobalt(II)-Phthalocyanine/Gold Nanoparticles for Photocatalytic Water Splitting

Morphology Effects on Electro- and Photo-Catalytic Properties of Zinc Oxide Nanostructures

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Mechanical ball-milling preparation and superior photocatalytic NO elimination of Z-scheme Bi12SiO20-based heterojunctions with surface oxygen vacancies

Cited by 27 publications

References 54 publications

Treatment of Organophosphorus Esters Waste by CeO2: Efficient Degradation with Simultaneous Phosphorus Immobilization

Treatment of Organophosphorus Esters Waste by CeO2: Efficient Degradation with Simultaneous Phosphorus Immobilization

Chitosan-Derived Nitrogen-Doped Carbon as a Support of Cobalt(II)-Phthalocyanine/Gold Nanoparticles for Photocatalytic Water Splitting

Morphology Effects on Electro- and Photo-Catalytic Properties of Zinc Oxide Nanostructures

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Treatment of Organophosphorus Esters Waste by CeO₂: Efficient Degradation with Simultaneous Phosphorus Immobilization

Treatment of Organophosphorus Esters Waste by CeO₂: Efficient Degradation with Simultaneous Phosphorus Immobilization