Review on the photocatalytic activity of various composite catalysts

Sudha, D.; Palanisamy, Sivakumar

doi:10.1016/j.cep.2015.08.006

Cited by 241 publications

(86 citation statements)

References 144 publications

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“…It is broadly accepted that hybrid catalysts will enhance photocatalytic properties in comparison to individual semiconductor catalysts [77,78]. For example, Sun et al found that the photo-degradation efficiency of MB over ZnO nanorod arrays (NRs) was significantly enhanced by decoration with Au (ZnO/Au composite) [187].…”

Section: Degradation Of Methylene Blue (Mb)mentioning

confidence: 99%

“…Thus, the high photo-degradation efficiency was probably due to the high defects concentration and the suppression of the recombination of electron-hole pairs. A semiconductor is also applied to modifiy the intrinsic semiconductor in order to improve photocatalytic properties [77,78]. Kayaci et al produced morphologically well defined poly (acrylonitrile) (PAN) nanofibrous via electronspinning, and then coated it with ZnO through an atomic layer deposition method, which served as crystal seed to grow single crystalline ZnO nanoneedles via a hydrothermal process [191].…”

Section: Degradation Of Methylene Blue (Mb)mentioning

confidence: 99%

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The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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Zinc oxide (ZnO), with the unique chemical and physical properties of high chemical stability, broad radiation absorption range, high electrochemical coupling coefficient, and high photo-stability, is an attractive multifunctional material which has promoted great interest in many fields. What is more, its properties can be tuned by controllable synthesized morphologies. Therefore, after the success of the abundant morphology controllable synthesis, both the morphology-dependent ZnO properties and their related applications have been extensively investigated. This review concentrates on the properties of morphology-dependent ZnO and their applications in catalysis, mainly involved reactions on green energy and environmental issues, such as CO 2 hydrogenation to fuels, methanol steam reforming to generate H 2 , bio-diesel production, pollutant photo-degradation, etc. The impressive catalytic properties of ZnO are associated with morphology tuned specific microstructures, defects or abilities of electron transportation, etc. The main morphology-dependent promotion mechanisms are discussed and summarized.

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Section: Degradation Of Methylene Blue (Mb)mentioning

confidence: 99%

Section: Degradation Of Methylene Blue (Mb)mentioning

confidence: 99%

The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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“…The latter one can be roughly divided into three categories, namely, synthesis regulation, 12 element doping, 13,14 and hybridization. 15,16 Herein, the question comes whether certain guidelines exist when we try to develop a new photocatalytic material or modify an existing photocatalyst. The solution to the modification method of element doping seems easy since the element types are limited and one can examine the performance of a photocatalyst doped with all kinds of elements one by one.…”

Section: Introductionmentioning

confidence: 99%

Review on DFT calculation of s‐triazine‐based carbon nitride

et al. 2019

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To improve the photocatalytic performance of pristine photocatalysts, element doping, construction of composites and fabrication of novel nanostructures are recognized as universal modification methods. These methods have been experimentally verified to be effective in manifold photocatalytic application over various photocatalysts. Density functional theory (DFT) calculation is a powerful and fundamental tool to pinpoint the intrinsic mechanism of the enhanced photocatalytic activity. And it holds the degree of precision ranging from atoms, molecules to unit cells. Herein, recent DFT calculation research progress of modified s-triazine-based graphitic carbon nitride (g-C 3 N 4 ) systems as photocatalysts is summarized. To specify, we collected information of doping site, formation energy, geometric, and electronic properties. We also discussed the synergistic effect of work function, Fermi level and band edge position on the built-in electric field, transfer route of photogenerated charge carriers and photocatalytic mechanism (traditional type Ⅱ or direct Z-scheme heterostructure). Moreover, we analyzed the geometric configuration, band structure, and stability of g-C 3 N 4 nanocluster, nanoribbon, and nanotube. Finally, future perspective in the further theoretical revelation of g-C 3 N 4 -based photocatalysts is proposed.

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“…In order to maximize the lifetime of the photogenerated charges, various approaches can be considered: deposition of noble metals [11], doping with transition metals/noble metals [12], creating composites with other semiconductors [13] and using of carbon nanomaterials [14]. It is already known that the first above mentioned approach can enhance the photocatalytic activity because the recombination of the electron-hole pairs is lowered as a result of the transfer of photogenerated electrons from the semiconductor oxide to the noble metal nanoparticle.…”

Section: Introductionmentioning

confidence: 99%