Multi-layer and open three-dimensionally ordered macroporous TiO2–ZrO2 composite: diversified design and the comparison of multiple mode photocatalytic performance

Zhang, Jianqi; Li, Li; Liu, Di; Zhang, Jingjing; Hao, Yuting; Zhang, Wenzhi

doi:10.1016/j.matdes.2015.07.166

Cited by 46 publications

(21 citation statements)

References 54 publications

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“…6a,g ) indicates that it is possible for meso-TiO 2 in PVDF to oxidize organic pollutants into non-toxic materials after the adsorption of MO onto the surface of meso-TiO 2 ( Fig. 8c ), which should be induced by the photogenerated holes and some radicals 37 39 41 42 43 44 45 46 , especially very reactive hydroxyl radicals (·OH) formed by the reactions of the holes left in the valence band (VB) of TiO 2 with the adsorbed water or surface hydroxyl and considered as the major active species responsible for the photocatalytic oxidation 42 43 44 45 46 . As a comparison, the low efficiency of PVDF/meso-TiO 2 /P123 membrane for the photodegradation of MO ( Fig.…”

Section: Discussionmentioning

confidence: 99%

Highly hydrophilic poly(vinylidene fluoride)/meso-titania hybrid mesoporous membrane for photocatalytic membrane reactor in water

Wang

Yang

Jin

et al. 2016

Sci Rep

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The high hydrophobicity of poly(vinylidene fluoride) (PVDF) membrane remains an obstacle to be applied in some purification processes of water or wastewater. Herein, a highly hydrophilic hybrid mesoporous titania membrane composed of mesoporous anatase titania (meso-TiO2) materials inside the three-dimensional (3D) macropores of PVDF membrane was successfully prepared by using the dual-templated synthesis method combined with solvent extraction and applied as the photocatalytic membrane reactor for the photodegredation of organic dye in water. The structure and the properties of as-prepared hybrid membranes were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), X-ray diffraction (XRD), nitrogen adsorption–desorption and contact angle measurements. It was found that the hydrophilicity of PVDF membrane can be significantly improved by filling mesoporous TiO2 inside the 3D macropores of PVDF membrane. Moreover, such a PVDF/meso-TiO2 hybrid membrane exhibits promising photocatalytic degradation of dye in water due to the existence of mesoporous anatase TiO2 materials inside PVDF membrane. This study provides a new strategy to simultaneously introduce hydrophilicity and some desirable properties into PVDF and other hydrophobic membranes.

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Section: Discussionmentioning

confidence: 99%

Highly hydrophilic poly(vinylidene fluoride)/meso-titania hybrid mesoporous membrane for photocatalytic membrane reactor in water

Wang

Yang

Jin

et al. 2016

Sci Rep

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“…It was also reported that the trapping of abundant OH groups on the surface of binary oxide catalyst by holes promotes the suppression of the recombination process which, in turn, improves the quantum efficiency. It is also demonstrated that incorporation of ZrO 2 in TiO 2 can promote the thermal stability of the catalyst by preventing the phase transformation from anatase to rutile [19][20][21].…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Effect of duty cycle and electrolyte additive on photocatalytic performance of TiO2-ZrO2 composite layers prepared on CP Ti by micro arc oxidation method

Babaei

Dehghanian

Taheri

et al. 2016

Surface and Coatings Technology

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The aim of this work is to discuss the photocatalytic performance of the titania-zirconia porous photocatalyst layers synthesized via micro arc oxidation technique. An attempt was also made to put forward the basic formation mechanism of the layers. Impedance and optical properties of the photocatalyst layers were studied by electrochemical impedance spectroscopy (EIS), Photoluminescence spectroscopy and UV-vis absorption spectroscopy, in order to assess their intrinsic catalytic properties.The results of the EIS were correlated with the microstructural characteristics along with measurements of Methylene Blue (MB) photocatalytic degradation. The results show enhanced photocatalytic activity of TiO 2 -ZrO 2 composite layers compared to pure TiO 2 layer. It was revealed that the photocatalytic activity of the layers prepared at different duty cycles is influenced by characteristics of microdischarge regime imposed by working electrolytes with varying additive concentration. The results of photocatalytic degradation of methylene blue were in good agreement with those obtained from electrochemical analysis.

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“…31,32 Such a type of isotherm pattern was also reported by previous studies for various mesoporous silica-based materials. 19,33,34 The up-steps at relative pressures of P/P o = 0.3-0.4 and P/P o = 0.9-1.0 showed N 2 capillary condensed in the intra-and interparticle mesopores, respectively. 35,36 The BET surface area, pore volume, and pore size of the catalysts are listed in Table S1.…”

Section: Catalyst Characterization Morphological and Structural Analysesmentioning

confidence: 99%

Visible‐light driven photodegradation of phenol over niobium oxide‐loaded fibrous silica titania composite catalyst

Zakaria

Hassan

Ibrahim

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND Heterogeneous photocatalysis has been demonstrated to be a promising alternative to treating emerging pollutants in wastewater. Phenol, an extremely toxic substance among existing pollutants, can cause long‐term unintended effects when improperly disposed. An effective measure to address this problem is to develop suitable heterojunctions. Among various photocatalyst, titanium dioxide (TiO2) appears to be an excellent photocatalyst in the degradation of organic pollutants. RESULTS Synthetization of well‐constructed heterojunction composite of niobium oxide (Nb2O5) and fibrous silica titania (FST) for enhanced photocatalytic degradation of phenol has been investigated. The photocatalytic performance demonstrated that 5 wt% Nb2O5 loaded on FST (5 Nb/FST) gave the maximum phenol degradation rate (1.70 × 10−2 mM min−1) of 10 mg L−1 phenol at pH 5 using 1000 mg L−1 catalyst within 180 min. Meanwhile, under the same conditions, 1 Nb/FST, FST, 10 Nb/FST and Nb2O5 only delivered 1.51 × 10−2, 1.30 × 10−2, 1.01 × 10−2 and 0.07 × 10−2 mM min−1, respectively. Further phenol photocatalytic degradation routes by 5 Nb/FST reveal that the main intermediates detected are hydroquinone, catechol, maleic, fumaric, and malonic acid. CONCLUSION In this work, 5 Nb2O5/FST composite, as an effective‐performance photocatalyst for phenol degradation, was well‐constructed. The advanced activity can primarily be attributed to the regulated Nb2O5 loading with FST and the effect of Nb/FST microsphere heterojunctions, synergistically. Besides, larger crystallite size, high impurity levels and Si‐O‐Nb and Nb–O–Ti bonds, offers excellent phenol degradation. © 2020 Society of Chemical Industry (SCI)

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Multi-layer and open three-dimensionally ordered macroporous TiO2–ZrO2 composite: diversified design and the comparison of multiple mode photocatalytic performance

Cited by 46 publications

References 54 publications

Highly hydrophilic poly(vinylidene fluoride)/meso-titania hybrid mesoporous membrane for photocatalytic membrane reactor in water

Highly hydrophilic poly(vinylidene fluoride)/meso-titania hybrid mesoporous membrane for photocatalytic membrane reactor in water

Effect of duty cycle and electrolyte additive on photocatalytic performance of TiO2-ZrO2 composite layers prepared on CP Ti by micro arc oxidation method

Visible‐light driven photodegradation of phenol over niobium oxide‐loaded fibrous silica titania composite catalyst

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