Photoelectrodeposition effect of lanthanum oxide-modified ceria particles on the removal of lead (II) ions from water

Ayawanna, Jiratchaya; Sato, Kazunori

doi:10.1016/j.cattod.2017.11.010

Cited by 9 publications

(4 citation statements)

References 47 publications

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“…It is noteworthy that the coexistence of anions such as H 2 PO 4 − , SO 4 2− , and HCO 3 − would bring down the adsorption capacity. Moreover, CeO 2 has also been reported to cooperate with other metal oxides to treat heavy metals [211,212]. Different morphologies of CeO 2 nanopowder were prepared and the removal effect of samaria-doped ceria nanopowder (SDC) towards Pb (II), Cu (II), and Zn (II) was investigated [213].…”

Section: Nanomaterials For Removing Heavy Metalsmentioning

confidence: 99%

Nanomaterials for the Removal of Heavy Metals from Wastewater

et al. 2019

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Removal of contaminants in wastewater, such as heavy metals, has become a severe problem in the world. Numerous technologies have been developed to deal with this problem. As an emerging technology, nanotechnology has been gaining increasing interest and many nanomaterials have been developed to remove heavy metals from polluted water, due to their excellent features resulting from the nanometer effect. In this work, novel nanomaterials, including carbon-based nanomaterials, zero-valent metal, metal-oxide based nanomaterials, and nanocomposites, and their applications for the removal of heavy metal ions from wastewater were systematically reviewed. Their efficiency, limitations, and advantages were compared and discussed. Furthermore, the promising perspective of nanomaterials in environmental applications was also discussed and potential directions for future work were suggested.

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Section: Nanomaterials For Removing Heavy Metalsmentioning

confidence: 99%

Nanomaterials for the Removal of Heavy Metals from Wastewater

et al. 2019

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“…La-doped CeO 2 materials are of great interest because of their numerous applications in different fields, including catalysis, − photoluminescence, , thermal barrier coatings, and electrochemistry. − In particular, these materials are widely used in high-temperature electrochemical devices for energy production and storage and as membranes for hydrogen production and solid oxide fuel cells because of their remarkable mixed ionic–electronic conductivity. − …”

Section: Introductionmentioning

confidence: 99%

Relationship between the Structure and Transport Properties in the Ce_1–xLa_xO_2–x/2 System

et al. 2019

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La-doped CeO 2 materials have been widely investigated for potential applications in different high-temperature electrochemical devices, such as fuel cells and ceramic membranes for hydrogen production. However, the crystal structure is still controversial, and different models based on fluorite, pyrochlore, and/or type-C structures have been considered, depending on the lanthanum content and synthesis method used. In this work, an exhaustive structural analysis of the Ce 1−x La x O 2−x/2 system (0.2 < x ≤ 0.7) is performed with different techniques. The average crystal structure, studied by conventional X-ray diffraction, could be considered to be a disordered fluorite; however, the local structure, examined by electron diffraction and Raman spectroscopy, reveals a biphasic mixture of fluorite and C-type phases. The thermal and electrical properties demonstrate that the materials with x ≥ 0.4 are oxide ion proton conductors in an oxidizing atmosphere and mixed ionic electronic conductors in a reducing atmosphere. The water uptake and proton conductivity increase gradually with the increase in La content, suggesting that the formation of the C-type phase is responsible for the proton conduction in these materials.

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“…The CB position indicates that Cr +6 can be reduced (redox potential of Cr +6 /Cr +3 : 1.35 eV), whereas Pb 0 cannot be easily reduced (redox potential of Pb +2 /Pb 0 is 0.1262 eV). Similarly, conversion of Pb +2 to Pb 0 reported by Bi 2 O 3 −TiO 2 (visible light), La 2 O 3 ‐modified CeO 2 , Ce 0.9 La 0.1 O 1.95 −CeO 2 hetero‐junctions (UV‐light), Histidine and imidazole modified TiO 2 [97–98] . Furthermore, photoluminescence investigations revealed that connecting SnO 2 with the CaO generated rapid electron trapping and minimised charge recombination (PL results).…”

Section: Resultsmentioning

confidence: 87%

“…Similarly, conversion of Pb + 2 to Pb 0 reported by Bi 2 O 3 À TiO 2 (visible light), La 2 O 3 -modified CeO 2 , Ce 0.9 La 0.1 O 1.95 À CeO 2 hetero-junctions (UVlight), Histidine and imidazole modified TiO 2 . [97][98] Furthermore, photoluminescence investigations revealed that connecting SnO 2 with the CaO generated rapid electron trapping and minimised charge recombination (PL results). The PL spectra were recorded as Figure 6S because charge carrier life time plays a significant role in photocatalytic reduction of metal ions.…”

Section: Investigation Of Photocatalytic Removal Mechanism Of Crmentioning

confidence: 99%

Chicken Egg Shell Waste Derived Calcium Oxide Based Nanohybrid For Rapid Removal of Heavy Metal Ions from Water: Green Synthesis, Kinetics and Reusability

et al. 2023

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The carcinogenic metal ions chromium (Cr + 6 ) and lead (Pb + 2 ) are prominent water pollutants. To substantiate this, green synthesized SnO 2 nanoparticle (using S. mukorossi extract) was coupled with egg shell derived CaO nanocrystals. Crystalline nature of synthesized catalyst confirmed by PXRD and microscopic study revealed spherical SnO 2 decorated on the irregular surface of CaO. Synthesized nanohybrid followed adsorption and photocatalytic reduction (Cr + 6 to Cr + 3 ; Pb + 2 to Pb 0 ) (Cr + 6 : 94 %; Pb + 2 : 88 %) phenomenon. Synergism of CaO (51.9 m 2 g À 1 ;2.9 eV) and SnO 2 (13.3 m 2 g À 1 ; 3.15 eV) was resulted into plenty of surface area (91.9 m 2 g À 1 ), low band gap (2.4 eV), and semiconducting nature of nanohybrid. As compared to Pb + 2 removal of Cr + 6 was faster due to higher value of reduction potential [Cr + 6 /Cr + 3 (1.35 eV); Pb + 2 /Pb 0 (À 0.1262 eV)]. Photocatalyst proved to be effective upto 10 th cycle. SnO 2 @CaO nanohybrid might be considered a potential photocatalyst in industries with sustainable approach.

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Photoelectrodeposition effect of lanthanum oxide-modified ceria particles on the removal of lead (II) ions from water

Cited by 9 publications

References 47 publications

Nanomaterials for the Removal of Heavy Metals from Wastewater

Nanomaterials for the Removal of Heavy Metals from Wastewater

Relationship between the Structure and Transport Properties in the Ce_1–xLa_xO_2–x/2 System

Chicken Egg Shell Waste Derived Calcium Oxide Based Nanohybrid For Rapid Removal of Heavy Metal Ions from Water: Green Synthesis, Kinetics and Reusability

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Photoelectrodeposition effect of lanthanum oxide-modified ceria particles on the removal of lead (II) ions from water

Cited by 9 publications

References 47 publications

Nanomaterials for the Removal of Heavy Metals from Wastewater

Nanomaterials for the Removal of Heavy Metals from Wastewater

Relationship between the Structure and Transport Properties in the Ce1–xLaxO2–x/2 System

Chicken Egg Shell Waste Derived Calcium Oxide Based Nanohybrid For Rapid Removal of Heavy Metal Ions from Water: Green Synthesis, Kinetics and Reusability

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Relationship between the Structure and Transport Properties in the Ce_1–xLa_xO_2–x/2 System