Core–Shell Structured Phenolic Polymer@TiO2 Nanosphere with Enhanced Visible-Light Photocatalytic Efficiency

Xu, Xiankui; Zhang, Lei; Zhang, Shihua; Wang, Yanpeng; Liu, Baoying; Ren, Yanrong

doi:10.3390/nano10030467

Cited by 5 publications

(3 citation statements)

References 46 publications

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“…The chemical structures of the TiNPs/PSF-0.40, PSF and TiO 2 were characterized by FTIR spectroscopy. As shown in Figure 2 d, the broad absorption band from 3400 to 3200 cm −1 and the weak peak at 1616.3 cm −1 in the spectrum of the P25 TiO 2 are attributed to the stretching vibration of hydroxyl groups (OH) and absorbed water on the surface [ 20 ]. The FTIR spectra of the peaks situated at 1150 cm −1 , 1242 cm −1 , and 2967 cm −1 can be assigned to the −SO 2 stretch, C−O−C linkage, and aliphatic C−H stretch, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Neghi et al prepared polyvinyl alcohol/chitosan-TiO 2 composite applied for photocatalytic removal of metronidazole under UV-light [ 19 ]. Xu et al prepared the Phenolic Polymer@TiO 2 composite to degrade rhodamine B [ 20 ]. Mahmoud et al compared the use of suspended and attached catalysts for degradation of 2, 4-dichlorophenol (2, 4-DCP), and found that suspended catalyst showed faster degradation rate than attached catalyst due to better interaction between catalyst particles and pollutant molecules [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

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Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

et al. 2021

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Nanosized titanium oxide (TiO2) material is a promising photocatalyst for the degradation of organic pollutants, whereas the difficulty of its recycling hinders its practical application. Herein, we reported the preparation of a novel titanium oxide/polysulfone (TiNPs/PSF) composite hollow microspheres by the combination of Pickering emulsification and the solvent evaporation technique and their application for the photodegradation of methyl blue (MB). P25 TiO2 nanoparticles dispersed on the surface of PSF microspheres. The porosity, density and photoactivity of the TiNPs/PSF composite microsphere are influenced by the TiO2 loading amount. The composite microsphere showed good methyl blue (MB) removal ability. Compared with TiO2 P25, and PSF, a much higher MB adsorption speed was observed for TiNPs/PSF microspheres benefited from their porous structure and the electrostatic attractions between the MB+ and the negatively charged PSF materials, and showed good degradation efficiency. For TiNPs/PSF composite microsphere with density close to 1, a 100% MB removal (10 mg L−1) within 120 min at a catalyst loading of 2.5 g L−1 can be obtained under both stirring and static condition, due to well dispersing of TiO2 particles on the microsphere surface and its stable suspending in water. For the non-suspended TiNPs/PSF composite microsphere with density bigger than 1, the 100% MB removal can be only obtained under stirring condition. The removal efficiency of MB for the composite microspheres retained 96.5%, even after 20 cycles. Moreover, this composite microsphere also showed high MB removal ability at acidic condition. The high catalysis efficiency, excellent reusability and good stability make this kind of TiNPs/PSF composite microsphere a promising photocatalyst for the water organic pollution treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

et al. 2021

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“…Along with this major challenge, the morphology of the resulting material is usually core-shell: the outer shell is an organic polymer, whereas the inner core is an inorganic semiconductor (TiO 2 ). In this core-shell form, [31][32][33][34] the photo-excited electrons from organic polymers are not effectively harvested because generated excitons are confined to the inorganic semiconductor core. [35,36] An outer polymer shell makes the photocatalyst more hydrophobic, leading to a decrease in the HER performance because of the difficult access to water.…”

Section: Introductionmentioning

confidence: 99%

Unveiling a Three Phase Mixed Heterojunction via Phase‐Selective Anchoring of Polymer for Efficient Photocatalysis

Jadhav

Bui

Cho

et al. 2022

Advanced Energy Materials

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because solar energy is freely available and hydrogen fuel is clean with high gravimetric energy density. For practical applications, it is very important to develop a low-cost water-splitting photocatalyst with an ≈10% solar-to-hydrogen energy conversion. [4] Nearly half of the energy in the sunlight that reaches Earth's surface comes from visible light photons (400-700 nm); therefore, it is important to develop a visible light active photocatalyst for efficient solar-to-fuel conversion. [5] Most of the research on photocatalysts has focused on wide bandgap semiconductors, such as TiO 2 , [6][7][8] SrTiO 3 , [9,10] and carbon nitride (CN). [11][12][13] Some of these photocatalysts have achieved very good operation stabilities that surpass 1000 h, along with more than 50% maximum external quantum efficiency for watersplitting reactions. [14][15][16] However, the wide and difficult-to-tune bandgaps of such photocatalysts restrict light absorption to only the ultraviolet (UV) region and thus fundamentally limit the practical applications for solar light harvesting to fuel. [16,17] Therefore, novel photocatalyst semiconductor materials with narrower bandgaps that can absorb a greater proportion of solar spectrum are needed to achieve the maximum theoretical solar energy conversion efficiency for practical applications.The ligand-to-metal charge transfer (LMCT) facilitated activation of TiO 2 has noteworthy potential for solar energy harvesting. However, the fast back electron transfer from TiO 2 to an oxidized sensitizer is a key limiting factor causing low photocatalyst efficiency. Herein, a new catalyst design to both increase LMCT efficiency and minimize the back electron transfer is presented. A phase-selective modification of mixed-phase TiO 2 (anatase: rutile interface) with poly-salophen organic polymer is developed. The salophen and salen family organic monomers are selectively bound and polymerized on the anatase phase but not the rutile phase, which results in the formation of a three-phase system. Such a three-phase system converts an unfavorable polymer TiO 2 core-shell structure to an intimately mixed blend morphology, consisting of interfaced crystalline rutile TiO 2 and an amorphous polymer-covered anatase-phase TiO 2 . The developed mixed-blend morphology poly-S@P25 can produce H 2 of 37 410 µmol h -1 g -1 of polymer, which is ≈3.4 times higher than core-shell poly-S@anatase TiO 2 . This approach overcomes the drawback of the traditional core-shell structured system for efficient electron harvesting from the LMCT process.

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Multidimensional TiO2 photocatalysts for the degradation of organic dyes in wastewater treatment

Xie,

Liu,

Liu

et al. 2024

J Porous Mater

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Core–Shell Structured Phenolic Polymer@TiO2 Nanosphere with Enhanced Visible-Light Photocatalytic Efficiency

Cited by 5 publications

References 46 publications

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

Novel TiO2 Nanoparticles/Polysulfone Composite Hollow Microspheres for Photocatalytic Degradation

Unveiling a Three Phase Mixed Heterojunction via Phase‐Selective Anchoring of Polymer for Efficient Photocatalysis

Multidimensional TiO2 photocatalysts for the degradation of organic dyes in wastewater treatment

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