Photocatalytic performance of mesoporous composites of TiO2–ZrO2 and phosphotungstic acid

Li, Qinlong; Feng, Caiting; Wu, Panfeng; Yuan, Xiyue; Hu, Huai‐Ming; Xue, Gi

doi:10.1007/s10853-019-04144-w

Cited by 10 publications

(2 citation statements)

References 62 publications

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“…To verify if PW additives can be completely removed after etching, SEL20 and eSEL20 were examined by XPS. As shown in Figures S9a and S9b, W 4f peaks of as-cast SEL20 can be observed at 38.47 and 36.36 eV, suggesting that W is mainly in the form of the +6 oxidation state . These peaks are shifted about 0.6 eV to higher energy compared with pure PW (37.9 and 35.8 eV).…”

Section: Resultsmentioning

confidence: 87%

Morphology-Controlled Mesopores with Hydrophilic Pore Walls from Triblock Copolymers

et al. 2022

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We report a facile approach that can simultaneously control the morphology and surface chemistry of mesoporous materials from triblock copolymers. By doping phosphotungstic acid (PW), the self-assembled structures of polystyrene–poly(ethylene oxide)–polylactide (PS–PEO–PLA, SEL) triblock copolymer can be tuned. Besides core–shell cylinders and lamellae, disordered bicontinuous structures can be achieved in SEL/PW composites. After etching with NaOH, PLA domains and PW additive are removed simultaneously, giving mesoporous PS monoliths with controlled morphologies and PEO-coated pores. Also, we demonstrated that the prepared porous PS monoliths can be used as templates to fabricate inorganic nanostructures. This work provides new insight into the fabrication of functional mesoporous materials.

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Section: Resultsmentioning

confidence: 87%

Morphology-Controlled Mesopores with Hydrophilic Pore Walls from Triblock Copolymers

et al. 2022

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“…In this sense, Thejaswini et al [25] prepared mesoporous worm-like ZrO 2 -doped (1, 2, 3, 4 and 5 molar % ratios) TiO 2 monolith materials for Naphthol Green B photodegradation, achieving ≥99% dye dissipation under optimized experimental conditions, where the highest molar ratio did not show any other crystallinity phase. Recently, Q. Li et al [26] studied the photocatalytic degradation of MO using mesoporous composite materials m-TiO 2 -ZrO 2 with 1, 3 and 5 molar ratios of Zr. In their XRD, it was possible to observe that at the 5 molar ratios of Zr, diffraction signals belonging to ZrO 2 were present.…”

Section: X-ray Diffractionmentioning

confidence: 99%

Photocatalytic Degradation of Rhodamine B and Methylene Orange Using TiO2-ZrO2 as Nanocomposite

et al. 2021

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The present research reports the synthesis of ZrO2-doped TiO2 photocatalysts at different ZrO2 contents (1, 3 and 5% wt.) synthesized by the sol–gel method. The samples were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction, attenuated total reflectance-Fourier transform infrared, ultraviolet–visible, X-ray photoelectron spectroscopy and N2 adsorption–desorption analysis. The photocatalytic activity of the ZrO2-doped TiO2 was investigated against the dyes methyl orange and rhodamine B through mineralization studies. The ZrO2-doped TiO2 samples presented a semiglobular-ovoid agglomerate shape around 500–800 nm. The samples presented high crystallinity of the TiO2 anatase phase, XPS suggested the formation of Zr–O–Ti bonds and the samples were classified as mesoporous materials with slight changes in the optical features in comparison with pure TiO2. Our study shows that the ZrO2-doped TiO2 composites exhibited a higher photocatalytic activity than just utilizing the synthetized TiO2 and a commercial P25. The different degradation behaviors are attributed to differences in the textural properties, and to the different optical absorptions of the samples due to structural defects created by the level of doping of Zr4+ ions into the TiO2 lattice. Reaction kinetics parameters were calculated by the Langmuir–Hinshelwood model, and a third run cycle of the ZrO2-doped TiO2 at 1% wt. achieved a photocatalytic degradation of 78.1 and 75.5% for RhB and MO, respectively.

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Construction of the Core–Shell Tourmaline@ZnO Micro-nano Structure Towards the Highly Efficient Degradation of Organic Pollutants

Sun

Guo

et al. 2021

Journal of Elec Materi

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Photocatalytic performance of mesoporous composites of TiO2–ZrO2 and phosphotungstic acid

Cited by 10 publications

References 62 publications

Morphology-Controlled Mesopores with Hydrophilic Pore Walls from Triblock Copolymers

Morphology-Controlled Mesopores with Hydrophilic Pore Walls from Triblock Copolymers

Photocatalytic Degradation of Rhodamine B and Methylene Orange Using TiO2-ZrO2 as Nanocomposite

Construction of the Core–Shell Tourmaline@ZnO Micro-nano Structure Towards the Highly Efficient Degradation of Organic Pollutants

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