Enhanced photocatalytic activity with metal ion doping and co-doping in CeO2 nanoparticles

Sharma, Punit; Pandey, O.P.

doi:10.1016/j.solidstatesciences.2022.106846

Cited by 33 publications

(10 citation statements)

References 59 publications

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“…However, Ce 3+ on the abrasive surface did not linearly increase with the increase in La 3+ doping in our research, which is consistent with reported work. , The phenomenon indicates that the Ce 3+ concentration on the abrasive surface is gradually saturated. In general, the surface of the sample has a relatively low defect formation energy, which is conducive to the formation of defects.…”

Section: Resultssupporting

confidence: 91%

“…Table shows the unit cell parameters of the Ce 1– x La x O 2 samples calculated using the Debye–Scherrer equation. This result indicates that the crystal size slightly decreases with the increase in La 3+ doping, which may be due to the La 3+ doping hindering the growth of the CeO 2 crystal . Furthermore, the lattice parameter is positively related to the La 3+ doping, which is caused by the difference in the ionic radius.…”

Section: Resultsmentioning

confidence: 87%

“…As shown in Figure b–d, octahedral particles appear after La 3+ doping, which is consistent with our previous work. The size of La 3+ -doped particles is reduced compared with that of pure CeO 2 particles, which is due to the lattice expansion caused by ion doping. As seen from the HRTEM images shown in Figure , the spacing of lattice stripes of R1 is measured as 0.306, 0.312, 0.319, and 0.322 nm, which represents the expansion of the corresponding (111) plane with La 3+ doping.…”

Section: Resultsmentioning

confidence: 98%

“…However, the explanation for enhancing the CMP performance of CeO 2 abrasives by doping remains ambiguous. Also, in some cases, , researchers have reported the negative effects of excessive doping on their performance. Therefore, it is also necessary to systematically study the influence of the amount of doping on abrasive properties and polishing performance.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the Polishing Efficiency of CeO₂ Abrasives on the SiO₂ Substrates by Improving the Ce³⁺ Concentration on Their Surface

Luo

et al. 2022

ACS Appl. Electron. Mater.

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The polishing activity of CeO 2 abrasives is enhanced by improving the Ce 3+ concentration on their surface. In this study, a series of Ce 1−x La x O 2 abrasives with different La 3+ doping were prepared. The abrasives were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The effects of La 3+ doping on the morphology, size, and Ce 3+ concentration of the abrasives were studied. The morphology of the particles changes from sphere to octahedron with the La 3+ doping. The lattice expansion of the CeO 2 crystal after La 3+ doping also significantly improves the Ce 3+ concentration on the abrasive surface. However, the Ce 3+ concentration on the surface gradually became saturated when the x was 0.2 or more. The polishing performance proved that the material removal rate (MRR) is closely related to the Ce 3+ concentration generated by La 3+ doping. The MRR of pure CeO 2 abrasives with a Ce 3+ concentration of 20.53% on a SiO 2 substrate is 59.31 nm/min, while the Ce 0.7 La 0.3 O 2 abrasives with the Ce 3+ concentration increased to 34.41% achieved 101.12 nm/min. The polished surface quality was characterized by atomic force microscopy, which shows improved roughness of all samples. Furthermore, the differences in the removal rate of Ce 3+ and Ce 4+ in CeO 2 -based abrasives on the SiO 2 substrate were also discussed.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Enhancing the Polishing Efficiency of CeO₂ Abrasives on the SiO₂ Substrates by Improving the Ce³⁺ Concentration on Their Surface

Luo

et al. 2022

ACS Appl. Electron. Mater.

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“…Besides, nanocrystals of co-substituted semiconductors have a better ability to impart new technological applications and are beneficial for diverse properties compared to the pure nanocrystal material. It was explicitly corroborated that co-substituting is a more effective tool than single metal/nonmetal/metalloids doping into host nanocrystals which are used to improve the properties of the photocatalyst 7 . In principle, the morphology, structural defects, and surface defects of metal sulfides and graphene metal sulfide nanocomposites play a vital role in controlling transport properties, chemical and thermal stability, and excitonic movements.…”

Section: Introductionmentioning

confidence: 88%

Intriguing physicochemical properties of N-doped Graphene oxide based ZnS nanowires for photocatalytic and biomedical applications

Dake

Raskar

Mane

et al. 2023

Preprint

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Superparamagnetic N-doped graphene oxide (GO)- with ZnS nanowires was synthesized by a one-step hydrothermal method by doping dilute amounts of Ga, Cr, In, and Al ions for water treatment and biomedical applications. In these experiments, to enhance their properties, 2% of Ga3+, In3+, and or Al3+ were codoped along with 2% Cr ions in these ZnS nanowires. The nanocomposite with the composition, In0.02Cr0.02Zn0.96S, has better photocatalytic efficiency than other co-doped nanocomposites. The In (metalloids) and Cr (transition metal ion) are the best combinations to increase the magnetic properties which are beneficial for photocatalytic activity. Synthesized nanocomposite materials were characterized by several techniques such as X-ray diffraction, Field emission-scanning electron microscope (FESEM) with EDAX, vibrating sample magnetometer (VSM), UV-Vis, X-ray photoelectron spectroscopy (XPS), and fluorescence spectroscopy. The correlation of intriguing magnetic properties with their photocatalytic properties is also discussed. XPS was employed for the detection of surface defects, phase transformation, and the nature of chemical components present in the nanocomposites. The Frankel and substitutional defects have a direct impact on photocatalytic activity that was determined from the fluorescence (FL) spectroscopy. FL and XPS reveal that the Cr and In codoped composite has a higher percentage of defects hence its photocatalytic efficiency reaches 94.21%.

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BimetallicCoCeO₂oxide nanoparticles: An efficient and reusable heterogeneous catalyst for the preparation of2‐amino‐3‐cyano‐4H‐pyran derivatives

Shaikh

Kamble

Gupta

et al. 2023

Journal of Heterocyclic Chem

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CoCeO2 NPs were successfully synthesized and confirmed using x‐ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and high‐resolution transmission electron microscopy (HRTEM) techniques. The catalytic performance of the synthesized CoCeO2 NPs catalyst was examined during the one‐pot multicomponent synthesis of biologically significant 2‐amino‐3‐cyano‐4H‐pyran derivatives. The reaction was easily accomplished using a one‐pot, three‐component reaction of dimedone, aryl aldehydes, and malononitrile in ethanol under reflux, with excellent yields and a short reaction time. The current catalytic system is more appealing because of its simple reaction conditions, uncomplicated product isolation, economic feasibility, and reusability of the catalyst free from significant loss of activity. This process offers an effective strategy for the synthesis of 2‐amino‐3‐cyano‐4H‐pyran derivatives.

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Enhanced photocatalytic activity with metal ion doping and co-doping in CeO2 nanoparticles

Cited by 33 publications

References 59 publications

Enhancing the Polishing Efficiency of CeO₂ Abrasives on the SiO₂ Substrates by Improving the Ce³⁺ Concentration on Their Surface

Enhancing the Polishing Efficiency of CeO₂ Abrasives on the SiO₂ Substrates by Improving the Ce³⁺ Concentration on Their Surface

Intriguing physicochemical properties of N-doped Graphene oxide based ZnS nanowires for photocatalytic and biomedical applications

BimetallicCoCeO₂oxide nanoparticles: An efficient and reusable heterogeneous catalyst for the preparation of2‐amino‐3‐cyano‐4H‐pyran derivatives

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Enhanced photocatalytic activity with metal ion doping and co-doping in CeO2 nanoparticles

Cited by 33 publications

References 59 publications

Enhancing the Polishing Efficiency of CeO2 Abrasives on the SiO2 Substrates by Improving the Ce3+ Concentration on Their Surface

Enhancing the Polishing Efficiency of CeO2 Abrasives on the SiO2 Substrates by Improving the Ce3+ Concentration on Their Surface

Intriguing physicochemical properties of N-doped Graphene oxide based ZnS nanowires for photocatalytic and biomedical applications

BimetallicCoCeO2oxide nanoparticles: An efficient and reusable heterogeneous catalyst for the preparation of2‐amino‐3‐cyano‐4H‐pyran derivatives

Contact Info

Product

Resources

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Enhancing the Polishing Efficiency of CeO₂ Abrasives on the SiO₂ Substrates by Improving the Ce³⁺ Concentration on Their Surface

Enhancing the Polishing Efficiency of CeO₂ Abrasives on the SiO₂ Substrates by Improving the Ce³⁺ Concentration on Their Surface

BimetallicCoCeO₂oxide nanoparticles: An efficient and reusable heterogeneous catalyst for the preparation of2‐amino‐3‐cyano‐4H‐pyran derivatives