SPR effect of Au nanoparticles on the visible photocatalytic RhB degradation and NO oxidation over TiO2 hollow nanoboxes

Chen, Lianqing; Tian, Lijun; Zhao, Xuan; Zhao, Huahua; Fan, Jiajie; Lv, Kangle

doi:10.1016/j.arabjc.2019.08.011

Cited by 42 publications

(11 citation statements)

References 61 publications

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“…In recent years, the degradation of toxic organic pollutants using heterogeneous photocatalysts has been intensively studied [18][19][20][21][22]. TiO 2 has been considered one of the best photocatalysts [23].…”

Section: Introductionmentioning

confidence: 99%

Diatom Biosilica Doped with Palladium(II) Chloride Nanoparticles as New Efficient Photocatalysts for Methyl Orange Degradation

Sprynskyy

Szczyglewska

Wojtczak

et al. 2021

IJMS

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A new catalyst based on biosilica doped with palladium(II) chloride nanoparticles was prepared and tested for efficient degradation of methyl orange (MO) in water solution under UV light excitation. The obtained photocatalyst was characterized by X-ray diffraction, TEM and N2 adsorption/desorption isotherms. The photocatalytic degradation process was studied as a function of pH of the solution, temperature, UV irradiation time, and MO initial concentration. The possibilities of recycling and durability of the prepared photocatalysts were also tested. Products of photocatalytic degradation were identified by liquid chromatography–mass spectrometry analyses. The photocatalyst exhibited excellent photodegradation activity toward MO degradation under UV light irradiation. Rapid photocatalytic degradation was found to take place within one minute with an efficiency of 85% reaching over 98% after 75 min. The proposed mechanism of photodegradation is based on the assumption that both HO• and O2•− radicals, as strongly oxidizing species that can participate in the dye degradation reaction, are generated by the attacks of photons emitted from diatom biosilica (photonic scattering effect) under the influence of UV light excitation. The degradation efficiency significantly increases as the intensity of photons emitted from biosilica is enhanced by palladium(II) chloride nanoparticles immobilized on biosilica (synergetic photonic scattering effect).

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Section: Introductionmentioning

confidence: 99%

Diatom Biosilica Doped with Palladium(II) Chloride Nanoparticles as New Efficient Photocatalysts for Methyl Orange Degradation

Sprynskyy

Szczyglewska

Wojtczak

et al. 2021

IJMS

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“…To improve the photocatalytic behavior of TiO2, the following strategies have been developed: (1) Textural and crystal design, such as the fabrication of mesoporous TiO2 to improve the adsorption of organic pollutants [13], hollow-structure TiO2 to extend the photo-absorption range [12,14,15], and high-energy TiO2 nanocrystals [16,17] to impede the recombination of the photo-generated carriers by stimulating the separation of the photo-induced eand h + to opposite facets; (2) doping TiO2 with metal or nonmetal elements to reduce the band gap by modifying its band structure [18]; (3) surface modification, such as modification of TiO2 with carbon materials [19] and deposition of noble metals on TiO2 [20][21][22] to improve its light harvesting properties and drive interfacial charge separation; and (4) the formation of homojunctions [23] or heterojunctions [24] to achieve spatial segregation of the carriers.…”

Section: Introductionmentioning

confidence: 99%

Effects of fluorine on photocatalysis

Liu

et al. 2020

Chinese Journal of Catalysis

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108

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“…Photocatalysis technology is widely used to solve environmental pollution problems [3][4][5] . For example, the reduction of hexavalent chromium 6 , the degradation of benzene 7 , phenol, p-nitrophenol 8 , organic dye [9][10][11][12] , antibiotic 13,14 , and the photocatalytic antibacterial are typical representatives 15,16 . In addition, in the production of pollution-free new energy, photocatalysis is used to produce hydrogen [17][18][19][20][21][22] , oxygen, hydrogen peroxide 23,24 , CO2 photoreduction [25][26][27][28][29] , photocatalytic nitrogen fixation 30 , etc.…”

Section: Introductionmentioning

confidence: 99%

All Organic S-Scheme Heterojunction PDI-Ala/S-C<sub>3</sub>N<sub>4</sub> Photocatalyst with Enhanced Photocatalytic Performance

李喜宝¹,

刘积有²,

黄军同³

et al. 2020

Acta Physico Chimica Sinica

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Organic photocatalysts have attracted attention owing to their suitable redox band positions, low cost, high chemical stability, and good tunability of their framework and electronic structure. As a novel organic photocatalyst, PDI-Ala (N,N'-bis(propionic acid)-perylene-3,4,9,10tetracarboxylic diimide) has strong visible-light response, low valence band position, and strong oxidation ability. However, the low photogenerated charge transfer rate and high carrier recombination rate limit its application. Due to the aromatic heterocyclic structure of g-C3N4 and large delocalized π bond in the planar structure of PDI-Ala, g-C3N4 and PDI-Ala can be tightly combined through π-π interactions and N-C bond. The band structure of sulfur-doped g-C3N4 (S-C3N4) matched well with PDI-Ala than that with g-C3N4. The electron delocalization effect, internal electric field, and newly formed chemical bond jointly promote the separation and migration of photogenerated carriers between PDI-Ala and S-C3N4. To this end, a novel step-scheme (Sscheme) heterojunction photocatalyst comprising organic semiconductor PDI-Ala and S-C3N4 was prepared by an in situ self-assembly strategy. Meanwhile, PDI-Ala was self-assembled by transverse hydrogen bonding and longitudinal π-π stacking. The crystal structure, morphology, valency, optical properties, stability, and energy band structure of the PDI-Ala/S-C3N4 photocatalysts were systematically analyzed and studied by various characterization methods such as X-ray diffraction, transmission electron microscopy, energy dispersive X-ray spectrometry, X-ray photoelectron spectroscopy, ultraviolet visible diffuse reflectance spectroscopy, electrochemical impedance spectroscopy, and Mott-Schottky curve. The work functions and interface coupling characteristics were determined using density functional theory. The photocatalytic activities of the synthesized photocatalyst for H2O2 production and the degradation of tetracycline (TC) and p-nitrophenol (PNP) under visible-light irradiation are discussed. The PDI-Ala/S-C3N4 S-scheme heterojunction with band matching and tight interface bonding accelerates the intermolecular electron transfer and broadens the visible-light response range of the heterojunction. In addition, in the processes of the PDI-Ala/S-C3N4 photocatalytic degradation reaction, a variety of active species (h + , •O2 − , and H2O2) were produced and accumulated. Therefore, the PDI-Ala/S-C3N4 heterojunction exhibited enhanced photocatalytic performance in the degradation of TC, PNP, and H2O2 production. Under visible-light irradiation, the optimum 30%PDI-Ala/S-C3N4 removed 90% of TC within 90 min. In addition, 30%PDI-Ala/S-C3N4 displayed the highest H2O2 evolution rate of 28.3 μmol•h −1 •g −1 , which was 2.9 and 1.6 times higher than those of PDI-Ala and S-C3N4,

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SPR effect of Au nanoparticles on the visible photocatalytic RhB degradation and NO oxidation over TiO2 hollow nanoboxes

Cited by 42 publications

References 61 publications

Diatom Biosilica Doped with Palladium(II) Chloride Nanoparticles as New Efficient Photocatalysts for Methyl Orange Degradation

Diatom Biosilica Doped with Palladium(II) Chloride Nanoparticles as New Efficient Photocatalysts for Methyl Orange Degradation

Effects of fluorine on photocatalysis

All Organic S-Scheme Heterojunction PDI-Ala/S-C<sub>3</sub>N<sub>4</sub> Photocatalyst with Enhanced Photocatalytic Performance

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