Template-free synthesis of hierarchical constructed flower-like δ-Bi
            <sub>2</sub>
            O
            <sub>3</sub>
            microspheres with photocatalytic performance

Xie, Jinsong; Li, Liangsong; Tian, Changlin; Cui, Han; Zhao, Dan

doi:10.1049/mnl.2012.0201

Cited by 15 publications

(9 citation statements)

References 14 publications

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“…It can be seen that the photocatalytic activity of the β/α‐Bi 2 O 3 (A) sample shows a slight decrease after 5 cycles of degradation reaction. The phase transformation of small amount Bi 2 O 3 towards Bi 2 O 2 CO 3 was noticed in the XRD patterns of β/α‐Bi 2 O 3 (A) after photocatalytic reaction (Figure S4), probably accounting for the slight decrease of activity, which is similar as the previous results …”

Section: Resultssupporting

confidence: 90%

“…The phase transformation of small amount Bi 2 O 3 towards Bi 2 O 2 CO 3 was noticed in the XRD patterns of β/α-Bi 2 O 3 (A) after photocatalytic reaction ( Figure S4), probably accounting for the slight decrease of activity, which is similar as the previous results. [47] Furthermore, in order to investigate the mechanism of photocatalytic reaction on β/α-Bi 2 O 3 junction sample, the determination of reactive species of hydroxyl radicals ( * OH) and superoxide radicals ( * O 2 À ) were carried out by ESR measurements ( Figure 6). DMPO/H 2 O and DMPO/CH 3 OH was prepared in the same method as the previous work.…”

Section: Resultsmentioning

confidence: 99%

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Self‐templated Constructing of Heterophase Junction into Hierarchical Porous Structure of Semiconductors for Promoting Photogenerated Charge Separation

Zhang

Liang

et al. 2020

ChemCatChem

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It is well‐known that photogenerated charge separation is the key and bottleneck step to determine the solar energy efficiency in photocatalysis. Although strategies for facilitating spatial charge separation of semiconductor‐based photocatalysts like heterojunctions, especially for heterophase junctions have been recognized as useful and adequate approaches, the original morphology‐tailored structures are always challenging to be maintained during the thermal‐induced phase transformation process. Herein, using a facile self‐templated method, we successfully fabricate heterophase junction into the well‐defined hierarchical porous structure of visible‐light‐responsive semiconductor, bismuth oxide (Bi2O3), without destroying the its unique hierarchical porous morphology. Such organic integration of heterophase junction and hierarchical porous structure are demonstrated to enable highly efficient separation of photogenerated electrons and holes, resulting in a remarkable enhancement in photocatalytic activities. Our work showcases a general concept for developing artificial photocatalyst systems via integrating efficient charge separation path into the unique morphology‐tailoring of semiconductors for highly efficient solar energy conversion.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Self‐templated Constructing of Heterophase Junction into Hierarchical Porous Structure of Semiconductors for Promoting Photogenerated Charge Separation

Zhang

Liang

et al. 2020

ChemCatChem

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“…Although Ag 2 O-based adsorbents displayed high adsorption capacity and selectivity for radioactive I – anions, the high costs of silver limits its practical application . Herein, microrosette-like δ-Bi 2 O 3 (hereafter, microrosette-like δ-Bi 2 O 3 is referred to as MR-δ-Bi 2 O 3 ) was fabricated via a simple hydrothermal process in the presence of glycine and bismuth nitrate pentahydrate as the raw materials . It was found that the MR-δ-Bi 2 O 3 could quickly react with I – anions by forming Bi 4 I 2 O 5 microcrystals and its sorption capacity is as high as ∼1.44 mmol g –1 .…”

Section: Introductionmentioning

confidence: 99%

Selective Capture of Iodide from Solutions by Microrosette-like δ-Bi₂O₃

Liu

Zhao³

et al. 2014

ACS Appl. Mater. Interfaces

115

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Radioactive iodine isotopes that are produced in nuclear power plants and used in medical research institutes could be a serious threat to the health of many people if accidentally released to the environment because the thyroid gland can absorb and concentrate them from a liquid. For this reason, uptake of iodide anions was investigated on microrosette-like δ-Bi2O3 (MR-δ-Bi2O3). The MR-δ-Bi2O3 adsorbent showed a very high uptake capacity of 1.44 mmol g(-1) by forming insoluble Bi4I2O5 phase. The MR-δ-Bi2O3 also displayed fast uptake kinetics and could be easily separated from a liquid after use because of its novel morphology. In addition, the adsorbent showed excellent selectivity for I(-) anions in the presence of large concentrations of competitive anions such as Cl(-) and CO3(2-), and could work in a wide pH range of 4-11. This study led to a new and highly efficient Bi-based adsorbent for iodide capture from solutions.

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“…[10][11][12] Recently, extensive investigations have concentrated on optimizing the microstructures of photocatalyst materials, especially 3D hierarchical structures. The synthesis of one-dimensional, [13][14][15][16][17][18][19][20][21][22][23][24][25] two-dimensional, 26 and three-dimensional Bi 2 O 3 nanostructures, [27][28][29][30] has been widely investigated by various synthetic methods. For example, alpha-and beta-Bi 2 O 3 nanowires were synthesized selectively by In et al via adjusting the heating temperature of a Bi precursor in a vapor transport process, and the growth direction of the nanowires was revealed by polarized Raman single nanowire spectra also.…”

Section: Introductionmentioning

confidence: 99%

The roles of density-tunable surface oxygen vacancy over bouquet-like Bi2O3 in enhancing photocatalytic activity

Lü

2014

Phys. Chem. Chem. Phys.

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Bouquet-like hierarchical Bi2O3 photocatalyst materials with high-density surface oxygen vacancy are synthesized via a hydrothermal method by the synergetic control of NaOH and a polyvinyl alcohol (PVA) stabilizer. The OH(-) ion addition led to the formation of more relaxed PVA macromolecular clusters, as a result, a thinner PVA film was formed, the species adsorbed on the surface of the produced Bi2O3 crystal nucleus could tune both the surface microstructure size and oxygen vacancy density via controlling the velocity, transfer and reaction of the OH(-) ions. The significant enhancement of photocatalytic performances could be attributed to the high density of the surface oxygen vacancy which was propitious to the charge separation efficiencies, distribution characteristic, and its role in a photo-redox reaction. A turnable-bending self-assembly mechanism was proposed to clarify the formation process of the bouquet-like hierarchical structure.

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Template-free synthesis of hierarchical constructed flower-like δ-Bi ₂ O ₃ microspheres with photocatalytic performance

Cited by 15 publications

References 14 publications

Self‐templated Constructing of Heterophase Junction into Hierarchical Porous Structure of Semiconductors for Promoting Photogenerated Charge Separation

Self‐templated Constructing of Heterophase Junction into Hierarchical Porous Structure of Semiconductors for Promoting Photogenerated Charge Separation

Selective Capture of Iodide from Solutions by Microrosette-like δ-Bi₂O₃

The roles of density-tunable surface oxygen vacancy over bouquet-like Bi2O3 in enhancing photocatalytic activity

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Template-free synthesis of hierarchical constructed flower-like δ-Bi 2 O 3 microspheres with photocatalytic performance

Cited by 15 publications

References 14 publications

Self‐templated Constructing of Heterophase Junction into Hierarchical Porous Structure of Semiconductors for Promoting Photogenerated Charge Separation

Self‐templated Constructing of Heterophase Junction into Hierarchical Porous Structure of Semiconductors for Promoting Photogenerated Charge Separation

Selective Capture of Iodide from Solutions by Microrosette-like δ-Bi2O3

The roles of density-tunable surface oxygen vacancy over bouquet-like Bi2O3 in enhancing photocatalytic activity

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Product

Resources

About

Template-free synthesis of hierarchical constructed flower-like δ-Bi ₂ O ₃ microspheres with photocatalytic performance

Selective Capture of Iodide from Solutions by Microrosette-like δ-Bi₂O₃