An ultrathin carbon layer activated CeO2 heterojunction nanorods for photocatalytic degradation of organic pollutants

Ye, Kai‐Hang; Li, Ya; Yang, Hao; Li, Mingyang; Huang, Yongchao; Zhang, Shanqing; Ji, Hongbing

doi:10.1016/j.apcatb.2019.118085

Cited by 189 publications

(58 citation statements)

References 57 publications

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“…The electrons react with oxygen to form O 2 − , which reacts with water or protons to form O 2 • and HO 2 , and then continues to form OH − and •OH . These free radicals have a strong oxidizing power and can oxidize and decompose organic matter until they are completely mineralized into CO 2 and H 2 O …”

Section: Resultsmentioning

confidence: 99%

Preparation Of ZnO/Co₃O₄ Hollow Microsphere By Pollen‐biological Template And Its Application In Photocatalytic Degradation

Liu

Zhang

et al. 2019

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ZnO/Co3O4 hollow microsphere was prepared by an impregnation method using lotus pollen as biotemplate for photocatalytic degradation of methylene blue (MB) and tetracycline (TC). This material was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), UV‐Vis diffuse reflectance spectroscopy (UV‐Vis DRS), N2 physical adsorption and X‐ray photoelectron (XPS). The results show that it can replicate the spherical morphology of pollen and form a hollow microsphere after the calcination in air with the diameter of about 25 μm and the wall thickness of about 2 μm. Under the irradiation using a xenon lamp, the degradation rate of MB was 95% in 90 minutes, and the degradation rate of TC was 90% in 60 minutes. Compared with pure ZnO or Co3O4 microspheres prepared by the same method, the photocatalytic performance of ZnO/Co3O4 hollow microsphere is superior, because of synergistic effect between Co and Zn and enhanced electron transfer. In addition, ZnO/Co3O4 hollow microsphere exhibits high reusability without significant decrease of the degradation activities of MB and TC after four cycles.

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Section: Resultsmentioning

confidence: 99%

Preparation Of ZnO/Co₃O₄ Hollow Microsphere By Pollen‐biological Template And Its Application In Photocatalytic Degradation

Liu

Zhang

et al. 2019

ChemistrySelect

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“…Combination of titania with carbon containing semiconductors such as carbon nitride [ 91 , 92 , 93 , 94 , 95 ] and graphene [ 96 , 97 , 98 , 99 ] or graphyne-type materials [ 100 , 101 , 102 ] can also be highlighted in the context of the UV-visible combination. Many oxides, for example, CeO 2 were also tested in combination with carbon layers [ 103 ] or carbon nitride [ 104 ]. Considering pure anatase, the interaction with carbon nitride has been analyzed but conflicting results are present in the literature.…”

Section: Composite Photocatalystsmentioning

confidence: 99%

Sunlight-Operated TiO2-Based Photocatalysts

et al. 2020

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Photo-catalysis is a research field with broad applications in terms of potential technological applications related to energy production and managing, environmental protection, and chemical synthesis fields. A global goal, common to all of these fields, is to generate photo-catalytic materials able to use a renewable energy source such as the sun. As most active photocatalysts such as titanium oxides are essentially UV absorbers, they need to be upgraded in order to achieve the fruitful use of the whole solar spectrum, from UV to infrared wavelengths. A lot of different strategies have been pursued to reach this goal. Here, we selected representative examples of the most successful ones. We mainly highlighted doping and composite systems as those with higher potential in this quest. For each of these two approaches, we highlight the different possibilities explored in the literature. For doping of the main photocatalysts, we consider the use of metal and non-metals oriented to modify the band gap energy as well as to create specific localized electronic states. We also described selected cases of using up-conversion doping cations. For composite systems, we described the use of binary and ternary systems. In addition to a main photo-catalyst, these systems contain low band gap, up-conversion or plasmonic semiconductors, plasmonic and non-plasmonic metals and polymers.

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“…Density functional theory (DFT) calculations were carried out to research electronic band structure and DOS of ZnFe O 4 with the Cambridge Sequential Total Energy Package (CASTEP). [60,61] ZnFe 2 O 4 belongs to Fd 3m (No.227) space group, and each unit cell contains eight ZnFe 2 O 4 molecules, which forms the tetrahedral and octahedral interstices. Zn 2 + or Fe 3 + occupies the center of tetrahedral or octahedral clearance, and owns four or six oxygen atoms, respectively (Figure 11a-c).…”

Section: Photocatalytic Mechanismsmentioning

confidence: 99%

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe₂O₄ Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

et al. 2020

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Photocatalysis is a promising solar energy conversion technology due to its potential applications in water treatment, searching for highly efficient photocatalytic materials is highly desirable. Herein, we have prepared a series of biochar(BC)/ZnFe2O4 magnetic nanocomposites by the calcination‐hydrothermal two‐step method. BC/ZnFe2O4 owns improved photoabsorption from 400 to 1300 nm. PL spectra of BC/ZnFe2O4 shows a weaker intensity compared with BC and ZnFe2O4, and BC/ZnFe2O4 generates a stronger photocurrent density (∼0.08 μA cm−2) than that of BC (0) or ZnFe2O4 (0.03 μA cm−2) under the visible light irradiation, implying efficient separation efficiency of photogeneration carriers. The investigation of pH (3, 5, 7, 9, 11) sensitivity of BC/ZnFe2O4 demonstrates that removal efficiency of Cr(VI) achieves the highest rate at pH=3. Under visible light irradiation, BC/ZnFe2O4 as photocatalyst can remove 80 % Cr(VI), higher than that of BC (0) or ZnFe2O4 (44 %). In addition, BC/ZnFe2O4 composites exhibit excellent cycling stability and can be easily separated for recycling due to its stability and unique magnetic properties. This work has presented a promising strategy in adsorption‐photocatalytic treatment of acidic wastewater containing heavy metals.

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An ultrathin carbon layer activated CeO2 heterojunction nanorods for photocatalytic degradation of organic pollutants

Cited by 189 publications

References 57 publications

Preparation Of ZnO/Co₃O₄ Hollow Microsphere By Pollen‐biological Template And Its Application In Photocatalytic Degradation

Preparation Of ZnO/Co₃O₄ Hollow Microsphere By Pollen‐biological Template And Its Application In Photocatalytic Degradation

Sunlight-Operated TiO2-Based Photocatalysts

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe₂O₄ Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

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An ultrathin carbon layer activated CeO2 heterojunction nanorods for photocatalytic degradation of organic pollutants

Cited by 189 publications

References 57 publications

Preparation Of ZnO/Co3O4 Hollow Microsphere By Pollen‐biological Template And Its Application In Photocatalytic Degradation

Preparation Of ZnO/Co3O4 Hollow Microsphere By Pollen‐biological Template And Its Application In Photocatalytic Degradation

Sunlight-Operated TiO2-Based Photocatalysts

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe2O4 Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis

Contact Info

Product

Resources

About

Preparation Of ZnO/Co₃O₄ Hollow Microsphere By Pollen‐biological Template And Its Application In Photocatalytic Degradation

Preparation Of ZnO/Co₃O₄ Hollow Microsphere By Pollen‐biological Template And Its Application In Photocatalytic Degradation

Removal of Cr(VI) from Acid Wastewater by BC/ZnFe₂O₄ Magnetic Nanocomposite via the Synergy of Absorption‐Photocatalysis