BiOBr–carbon nitride heterojunctions: synthesis, enhanced activity and photocatalytic mechanism

Fu, Jie; Tian, Yue; Chang, Binbin; Xi, Fengna; Dong, Xiaoping

doi:10.1039/c2jm34778d

Cited by 370 publications

(212 citation statements)

References 41 publications

(65 reference statements)

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“…2 shows the XRD patterns of CNs-BiOBr hybrids, pure BiOBr, and CNs. The diffraction peaks of pure BiOBr are in good agreement with the P4/nmm tetragonal phase BiOBr (JCPDS 73-2061) [39]. Sample CNs displays two pronounced peaks in spectrum.…”

Section: Tg Analysissupporting

confidence: 59%

“…Energy levels of bulk g-C 3 N 4 and BiOBr are well-matched, and hence several studies have investigated the optical and catalytic properties of BiOBr hybrids with bulk g-C 3 N 4 , instead of CNs [38][39][40][41]. Whereas, CNs with superior features to bulk g-C 3 N 4 , is more suitable to construct hybrids with other semiconductors of visible-light response.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced photocatalytic performance of g-C3N4 nanosheets–BiOBr hybrids

Chang¹,

Li²,

Chen³

et al. 2014

Superlattices and Microstructures

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a b s t r a c tExfoliated g-C 3 N 4 (CNs)-BiOBr hybrids with heterojunction structure was fabricated through a chemical deposition-precipitation route. The characterization showed the uniform existence of CNs and BiOBr in hybrids. The fabricated CNs-BiOBr was of enlarged specific surface area, unique optical property, and well-matched energy-band structures. The photocatalytic performance on dye Rhodamine B (RhB) and 2,4-diclorophenol (2,4-DCP) were dramatically improved. Under identical conditions, sample 0.5CNs-BiOBr and CNs-BiOBr were identified as the best candidate, respectively, for catalytic degradation of RhB and 2,4-DCP. The former could show a reaction rate over RhB about 2.7 and 6.8 times as high as BiOBr and CNs alone, and the later exhibited a reaction rate over 2,4-DCP nearly 7.5 and 2.5 times as high as individual BiOBr and CNs. Finally, a possible catalytic mechanism was also proposed through active species trapping experiments.

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Section: Tg Analysissupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic performance of g-C3N4 nanosheets–BiOBr hybrids

Chang¹,

Li²,

Chen³

et al. 2014

Superlattices and Microstructures

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show abstract

“…Through theoretical calculation, the CB potentials and VB potentials for BiOCl and g-C3N4 are estimated to be about 0.18 eV and 3.48 eV, and −1.08 eV and 1.52 eV, respectively. Under visible-light irradiation, photogenerated electron-hole pairs in g-C3N4 are obtained due to its narrow As is well known, the p-n heterostructure in a photocatalytic system plays a great role in accelerating the efficient separation of photogenerated electron-hole pairs and enhancing the photocatalytic activity [46][47][48][49]. Theoretically, adequate amounts of p-n heterojunctions between (001) facets of BiOCl and (002) facets of g-C 3 N 4 are formed during the synthetic process, which facilitates electrons from the n-type C 3 N 4 in the heterostructure interfaces transferring to the p-type BiOCl.…”

Section: Catalyst Photostability and Photocatalytic Mechanismmentioning

confidence: 99%

Ultrathin g-C3N4 Nanosheet-Modified BiOCl Hierarchical Flower-Like Plate Heterostructure with Enhanced Photostability and Photocatalytic Performance

Jia

Long

et al. 2017

Crystals

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Abstract:A novel ultrathin g-C 3 N 4 nanosheet-modified BiOCl hierarchical flower-like plate heterostructure (abbreviated as BC/CN) was constructed via a thermal polymerization of urea precursor followed with hydrolysis route. The as-prepared samples were well characterized by various analytical techniques. The morphological observation showed that hierarchical flower-like BiOCl nanoplates were discretely anchored on the surface of ultra-thin C 3 N 4 nanosheets. The photocatalytic performance of the as-prepared photocatalysts was evaluated by degradation of methylene blue (MB) under visible-light irradiation. The results showed that BC/CN photocatalyst exhibited enhanced photostability and photocatalytic performance in the degradation process. On the basis of experimental results and the analysis of band energy structure, it could be inferred that the enhanced photocatalytic performance of BC/CN photocatalyst was intimately related with the hybridization of hierarchical flower-like BiOCl nanoplates with ultrathin g-C 3 N 4 nanosheets, which provided good adsorptive capacity, extended light absorption, suppressed the recombination of photo-generated electron-hole pairs, and facilitated charge transfer efficiently.

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“…• free radicals [29][30][31]. These free radicals are responsible for the degradation of RhB dye into less harmful byproduct such as water as shown in (1)-(3).…”

Section: Photodegradation Mechanism Of Rhb Solution By Vmentioning

confidence: 99%

Synthesis of V₂O₅ Nanoflakes on PET Fiber as Visible-Light-Driven Photocatalysts for Degradation of RhB Dye

Chan

Pung

Sreekantan

2014

Journal of Catalysts

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The visible-light-driven semiconductor photocatalysts are the current research focus techniques used to decompose organic pollutants/compounds. The photodegradation efficiency of organic compounds by photocatalyst is expected to be better compared to UV-light-driven semiconductor photocatalysts technique since the major components of our solar energy are visible light (∼44%). However, as most of the previous research work has been carried out using semiconductor photocatalysts in the form of powder, extra steps and costs are needed to remove this powder from the slurry to prevent secondary pollution. In this research work, we will explain our fabrication technique of V 2 O 5 nanoflakes by growing radially on PET fibers. By utilizing the flexibility and high surface area of polymeric fibers as novel substrate for the growth of V 2 O 5 nanoflakes, the Rhodamine B (RhB) could be degraded under visible light irradiation. The photodegradation of RhB solution by V 2 O 5 nanoflakes followed the 1st order kinetic with a constant rate of 0.0065 min −1 . The success of this research work indicates that V 2 O 5 nanoflakes grown on PET fibre could be possibly used as organic waste water purifier under continuous flow condition. A photodegradation mechanism of V 2 O 5 nanostructures to degrade RhB dye is proposed based on the energy diagram.

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BiOBr–carbon nitride heterojunctions: synthesis, enhanced activity and photocatalytic mechanism

Cited by 370 publications

References 41 publications

Enhanced photocatalytic performance of g-C3N4 nanosheets–BiOBr hybrids

Enhanced photocatalytic performance of g-C3N4 nanosheets–BiOBr hybrids

Ultrathin g-C3N4 Nanosheet-Modified BiOCl Hierarchical Flower-Like Plate Heterostructure with Enhanced Photostability and Photocatalytic Performance

Synthesis of V₂O₅ Nanoflakes on PET Fiber as Visible-Light-Driven Photocatalysts for Degradation of RhB Dye

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BiOBr–carbon nitride heterojunctions: synthesis, enhanced activity and photocatalytic mechanism

Cited by 370 publications

References 41 publications

Enhanced photocatalytic performance of g-C3N4 nanosheets–BiOBr hybrids

Enhanced photocatalytic performance of g-C3N4 nanosheets–BiOBr hybrids

Ultrathin g-C3N4 Nanosheet-Modified BiOCl Hierarchical Flower-Like Plate Heterostructure with Enhanced Photostability and Photocatalytic Performance

Synthesis of V2O5 Nanoflakes on PET Fiber as Visible-Light-Driven Photocatalysts for Degradation of RhB Dye

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Synthesis of V₂O₅ Nanoflakes on PET Fiber as Visible-Light-Driven Photocatalysts for Degradation of RhB Dye