Synthesis of three-dimensionally ordered macroporous composite Ag/Bi2O3–TiO2by dual templates and its photocatalytic activities for degradation of organic pollutants under multiple modes

Li, Li; Huang, Xiandan; Hu, Tianyu; Wang, Jianxin; Zhang, Wenzhi; Zhang, Jianqi

doi:10.1039/c4nj01002g

Cited by 47 publications

(25 citation statements)

References 46 publications

(45 reference statements)

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“…The Bi 4f, O 1s and Ag 3d core level lines were deconvoluted after background subtraction. The Bi 2 O 3 –Ag raw materials and Bi 2 O 3 –Ag composites had similar line locations which are in agreement with those observed for the Ag/Bi 2 O 3 ‐TiO 2 composite …”

Section: Resultssupporting

confidence: 86%

Characterization of raw materials and self‐organized Bi₂O₃–Ag eutectic by X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy

Szubka

Talik

Sadecka

et al. 2017

Crystal Research and Technology

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Bi2O3–Ag raw materials were prepared using different synthetic routes: mortar and pestle and ball‐milling. They were later used as starting materials for the micro‐pulling down method. After the micro‐pulling down, the Bi2O3–Ag composites were annealed under vacuum, H2 and air atmospheres. All samples were characterized by the following methods: X‐ray diffraction (XRD), scanning electron microscopy (SEM/EDX) and X‐ray photoelectron spectroscopy (XPS). The SEM/EDS and XPS analyses showed that the raw materials prepared by ball‐milling had a much more homogenous distribution of silver. XPS investigations of all Bi2O3–Ag composites showed that Bi ions are mainly in the 3+ oxidation state but additionally some may exist in the Bi0 (metallic) and defected Bi(3‐x)+ valence states. In the case of Bi2O3–Ag composites grown from ball‐milled raw materials and annealed in H2, XPS studies clearly showed the presence of metallic silver nanoparticles, Ag0. Besides the nanoparticles, bulk metallic silver Ag0 and two oxidation states for silver Ag2O and AgO for all examined eutectic were found. The estimated band gap, based on XPS was about 2.8 eV. In the case of samples obtained from ball‐milled raw materials, additional states near the Fermi level were found which could be related to partial transformation of Bi2O3 into Bi0.

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Section: Resultssupporting

confidence: 86%

Characterization of raw materials and self‐organized Bi₂O₃–Ag eutectic by X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy

Szubka

Talik

Sadecka

et al. 2017

Crystal Research and Technology

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“…The high-resolution XPS spectra of the Ag 3d (Figure 3a) shows peaks at about3 73.7 and 367.7 eV correspondingt oA g 0 3d 3/2 and Ag 0 3d 5/2 ,r espectively. [18] The curve fitting for the W4f 5/2 andW4f 7/2 peaks (Figure 3b) are at ab inding energy of 37.8 and 35.7 eV,a ttributed to W VI 4f 5/2 and W VI 4f 7/2 ,r espectively. [19] And the peak at 41.7 eV can be assigned to W VI 5p 3/2 .…”

Section: Characterization Of Ag/ctab-pw 12mentioning

confidence: 95%

A Surfactant‐Encapsulating Polyoxometalate Nanowire Assembly as a New Carrier for Nanoscale Noble‐Metal Catalysts

Zhou

Feng

Tan

et al. 2016

Chemistry An Asian Journal

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The loading of noble-metal nanoparticles (NMNPs) onto various carriers to obtain stable and highly efficient catalysts is currently an important strategy in the development of noble metal (NM)-based catalytic reactions and their applications. We herein report a nanowire supramolecular assembly constructed from the surfactant-encapsulating polyoxometalates (SEPs) CTAB-PW , which can act as new carriers for NMNPs. In this case, the Ag NPs are loaded onto the SEP nanowire assembly with a narrow size distribution from 5 to 20 nm in diameter; the average size is approximately 10 nm. The Ag NPs on the nanowire assemblies are well stabilized and the over agglomeration of Ag NPs is avoided owing to the existence of well-arranged polyoxometalate (POM) units in the SEP assembly and the hydrophobic surfactant on the surface of the nanowire assembly. Furthermore, the loading amount of the Ag NPs can be adjusted by controlling the concentration of the AgNO aqueous solution. The resultant Ag/CTAB-PW composite materials exhibit high activity and good stability for the catalytic reduction of 4-nitrophenol (4-NP) with NaBH in isopropanol/H O solution. The NMNPs-loaded SEP nanoassembly may represent a new composite catalyst system for application in NM-based catalysis.

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“…The photocatalytic activity of the catalysts can be further improved due to the increase of active sites of the macroporous composites. In addition, compared with the sample without PS template treatment, the as-synthesized 3DOM TiO 2 -ZrO 2 composites possess an open, transparent and orderly macroporous structure; this is one of the reasons that the composite has high activity under microwave radiation [25,31,32,46,47]. Fig.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

“…PS spheres were synthesized by an emulsifier-free emulsion polymerization method [32]. Under the action of the PS template, 3DOM TiO 2 -ZrO 2 composites were synthesized by (1) a decompression filling method (S), and (2) a vacuum impregnation method (M), as described below.…”

Section: Synthesis Of 3dom Tio 2 -Zromentioning

confidence: 99%

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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

Zhang

Liu

et al. 2015

Materials & Design

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Synthesis of three-dimensionally ordered macroporous composite Ag/Bi₂O₃–TiO₂by dual templates and its photocatalytic activities for degradation of organic pollutants under multiple modes

Cited by 47 publications

References 46 publications

Characterization of raw materials and self‐organized Bi₂O₃–Ag eutectic by X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy

Characterization of raw materials and self‐organized Bi₂O₃–Ag eutectic by X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy

A Surfactant‐Encapsulating Polyoxometalate Nanowire Assembly as a New Carrier for Nanoscale Noble‐Metal Catalysts

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

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Synthesis of three-dimensionally ordered macroporous composite Ag/Bi2O3–TiO2by dual templates and its photocatalytic activities for degradation of organic pollutants under multiple modes

Cited by 47 publications

References 46 publications

Characterization of raw materials and self‐organized Bi2O3–Ag eutectic by X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy

Characterization of raw materials and self‐organized Bi2O3–Ag eutectic by X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy

A Surfactant‐Encapsulating Polyoxometalate Nanowire Assembly as a New Carrier for Nanoscale Noble‐Metal Catalysts

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

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Synthesis of three-dimensionally ordered macroporous composite Ag/Bi₂O₃–TiO₂by dual templates and its photocatalytic activities for degradation of organic pollutants under multiple modes

Characterization of raw materials and self‐organized Bi₂O₃–Ag eutectic by X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy

Characterization of raw materials and self‐organized Bi₂O₃–Ag eutectic by X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy