Transition metal-doped mesoporous TiO2 films fabricated through cellulose nanocrystal template synthesis: studies of physicochemical, spectrophotometric properties, and photocatalytic degradation activity

Yoon, Yong Han; Lee, S. Y.; Gwon, Jaegyoung; Vijayakumar, E.; Lee, H. G.; Lee, W. H.

doi:10.1007/s10570-022-04830-0

Cited by 8 publications

(5 citation statements)

References 89 publications

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“…It can be seen from Figure 3c and As shown in Figure 4, the FTIR spectra of RC, RCB, RCPB and RCPB/PAN/RCPB indicated that the introduction of nanoparticles did not change the structure of RC. Previous study has shown that the CH 2 infrared absorption peak at 1429 cm -1 is cellulose I, and at 1420 cm -1 is cellulose II (Yoon et al 2022;Nelson and O'Connor 1964). It can be seen from Figure 4a that the CH 2 absorption peak of the RC appeared at 1420 cm −1 , indicating that the NaOH/CO(NH 2 ) 2 system destroyed the intermolecular hydrogen bond of cotton short fiber and made the cellulose transformation from type I to type II completely.…”

Section: 1characterization Analysesmentioning

confidence: 79%

Fabrication of sandwich structure membrane and its performance for photocatalytic reduction of Cr(VI)

Ren

Jing

et al. 2023

Cellulose

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The regenerated cellulose membrane (RC) was synthesized by dissolving cotton cellulose in NaOH/CO(NH2)2 system. The Polydopamine/Bismuth Tungstate/RC composite membrane (RCPB) with visible light catalytic activity was synthesized via loading polydopamine-modified bismuth tungstate (PDA/BWO) composite on the RC by blending method. The RCPB/PAN/RCPB sandwich structure membrane was synthesized through combining the polyacrylonitrile (PAN) nanofiber membrane and RCPB by scraping method, which could reduce aqueous Cr(VI) under visible light. Characterization analysis showed that the tensile strength, elongation at break, roughness and initial water contact angle of RCPB/PAN/RCPB were 32.1 MPa, 5.34%, 0.658 μm and 69.0°, respectively. The photoreduction percent of Cr(VI) by RCPB/PAN/RCPB could reach 99.7% within 120 min with a rate constant of 0.0869 min -1 , and the photoreduction percent remained above 84.6% after four cycles. The introduction of PAN further improved the mechanical properties and recycling ability of RCPB. Meanwhile, the capture experiment revealed that the main active substance for photocatalytic reduction of Cr(VI) by RCPB/PAN/RCPB was photogenerated e -. This work provides a new idea for the treatment of Cr(VI)-containing wastewater.

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Section: 1characterization Analysesmentioning

confidence: 79%

Fabrication of sandwich structure membrane and its performance for photocatalytic reduction of Cr(VI)

Ren

Jing

et al. 2023

Cellulose

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“…P-type dopants, such as cobalt (Co 2+ ), chromium (Cr 3+ ), aluminum (Al 3+ ), or gallium (Ga 3+ ), in doped TiO 2 can perform as acceptor centers. 75 These cations can trap the photoelectrons and encourage the recombination of the photoelectrons and holes. In contrast, n-type dopants, known as the donor centers, including molybdenum (Mo 5+ ), antimony (Sb 5+ ), niobium (Nb 5+ ), tantalum (Ta 5+ ), and tungsten (W 6+ ), can trap the holes and hence enhance the recombination.…”

Section: Metal Ion-doped Tio 2 (M-doped Tio 2 )mentioning

confidence: 99%

“…In contrast, n-type dopants, known as the donor centers, including molybdenum (Mo 5+ ), antimony (Sb 5+ ), niobium (Nb 5+ ), tantalum (Ta 5+ ), and tungsten (W 6+ ), can trap the holes and hence enhance the recombination. 75,76 When doped with noble metal ions, TiO 2 is involved in the electron−hole pair separation event because Fermi levels are at different positions for TiO 2 and noble metal ions. 77 Furthermore, for higher loading of dopants (greater than 5%), the metal ion centers can become negatively charged and, consequently, attract positively charged holes to enhance the recombination potential.…”

Section: Metal Ion-doped Tio 2 (M-doped Tio 2 )mentioning

confidence: 99%

“…Localization of cationic dopant (such as Cu) in the deep d-level of the bandgap of TiO 2 can even serve as charge carriers recombination centers, , resulting in a reduction in photocatalytic activity. P-type dopants, such as cobalt (Co 2+ ), chromium (Cr 3+ ), aluminum (Al 3+ ), or gallium (Ga 3+ ), in doped TiO 2 can perform as acceptor centers . These cations can trap the photoelectrons and encourage the recombination of the photoelectrons and holes.…”

Section: Doping Of Tio2mentioning

confidence: 99%

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Mechanistic Understanding in Manipulating Energetics of TiO₂ for Photocatalysis

2023

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Titanium dioxide (TiO2) is a wide bandgap semiconductor that has a wide range of applications including wastewater treatment, photocatalysis, solar cells, and sensors owing to its excellent electronic and optical properties. However, the wide bandgap of TiO2 (∼3.2 eV) along with the recombination processes of the photoexcited charge carriers reduce its interfacial charge transport properties and respective activities. Energetics, optical response, and corresponding photophysics of excited charge carriers can be altered through doping and codoping of TiO2 and composite formulation. Therefore, it is very crucial to understand the structure–property and property-application relationships of doped, co-doped, and composite TiO2 to maximize the efficiency and extend the fundamental understanding for their applications in different fields. In this Perspective, we summarize the ongoing research on the advancement of undoped, doped, co-doped, and composite TiO2 including their structure and morphology, energetics, and corresponding photophysics relative to their applications in photocatalysis, wastewater treatment, and water-splitting reactions. We then propose our perspectives on the future potential of energetic manipulation of photocatalytic TiO2 to develop advanced and highly efficacious catalytic materials.

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“…The energy αhv = B(hv − E g ) n differences are due to doping different metal ferrite and the size of particle (Bilal et al, 2022). The reason for these different energies has been attributed to the interactions between metal ferrite nanoparticles and AHB, also the difference in interaction strength (Yoon et al, 2022). These differences showed that the oscillation times, which determine the energy band gap, change.…”

mentioning

confidence: 99%

Novel eco-friendly bio-nanocomposite including metal ferrites nanoparticles from hemp biomass: Its thermal, optical, magnetic, electrolytic conductivity and catalytic properties

Coşkun

Delibaş

Karanfil

2022

Preprint

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It has become increasingly popular in recent years to create improved functionalized nanomaterials in an effort to enhance their physicochemical, catalytic, and biological capabilities. In this study, eco-friendly, especially water dispersible bio-nanocomposites containing metal ferrite, MFe2O4 (M: Cu, Ni, Cd, Mn and Co) nanoparticle were synthesized low-cost method from hemp biomass and characterized by ATR-FTIR, XRD, SEM, TEM (STEM), EDX, VSM, Uv-Vis and TG/DTG analyses. The variation of their ionic conductivity with temperature and concentration and also their catalytic effects against cationic dyes such as methylene blue (MB), crystal violet (CrV) and malachite green oxalate (MGO) were investigated. XRD patterns and FTIR spectra of the AHB-MFe2O4, especially the stretching of Fe-O and M-O, showed the formation of metal ferrite bio-nanocomposites. Also, interaction between the biomass and metal ferrite nanoparticles was obviously seen from XRD patterns and FTIR spectra of the AHB-MFe2O4. It was determined that AHB-MFe2O4 bio-nanocomposites have high thermal stability, high ionic conductivity and negative surface charge. Moreover, they exhibited high catalytic performance against cationic dyes such as MB, CrV and MGO.

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Transition metal-doped mesoporous TiO2 films fabricated through cellulose nanocrystal template synthesis: studies of physicochemical, spectrophotometric properties, and photocatalytic degradation activity

Cited by 8 publications

References 89 publications

Fabrication of sandwich structure membrane and its performance for photocatalytic reduction of Cr(VI)

Fabrication of sandwich structure membrane and its performance for photocatalytic reduction of Cr(VI)

Mechanistic Understanding in Manipulating Energetics of TiO₂ for Photocatalysis

Novel eco-friendly bio-nanocomposite including metal ferrites nanoparticles from hemp biomass: Its thermal, optical, magnetic, electrolytic conductivity and catalytic properties

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Transition metal-doped mesoporous TiO2 films fabricated through cellulose nanocrystal template synthesis: studies of physicochemical, spectrophotometric properties, and photocatalytic degradation activity

Cited by 8 publications

References 89 publications

Fabrication of sandwich structure membrane and its performance for photocatalytic reduction of Cr(VI)

Fabrication of sandwich structure membrane and its performance for photocatalytic reduction of Cr(VI)

Mechanistic Understanding in Manipulating Energetics of TiO2 for Photocatalysis

Novel eco-friendly bio-nanocomposite including metal ferrites nanoparticles from hemp biomass: Its thermal, optical, magnetic, electrolytic conductivity and catalytic properties

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Product

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Mechanistic Understanding in Manipulating Energetics of TiO₂ for Photocatalysis