A New Bi-Based Oxychloride Bi4Ti0.5W0.5O8Cl as a Photocatalyst

Zhen, Siqi; Zhu, Lei; Dong, Zhengchao; Fan, Lele; Wang, Baolin; Zhang, Qinfang

doi:10.1007/s10562-018-2436-y

Cited by 10 publications

(2 citation statements)

References 24 publications

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“…Therefore, the doping of W in Bi4NbO8Cl leads to the decrease of photocatalytic activity. The above mechanism can be also used to understand the photocatalytic activity in Bi4Ti0.5W0.5O8Cl system, which is almost the same with Bi4NbO8Cl [38].…”

Section: Possible Photocatalysis Mechanismmentioning

confidence: 86%

Hole Doping to Enhance the Photocatalytic Activity of Bi4NbO8Cl

Sun

Han

et al. 2020

Catalysts

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An increase of carrier concentration is one of the most important routes for enhancing the catalytic performance of semiconductor photocatalysts. In this study, the Sillén–Aurivillius oxychloride Bi4NbO8Cl with hole doping was successfully prepared by a solid-state reaction method. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible diffuse reflectance spectra (UV–vis DRS), X-ray photoelectron spectrometry (XPS) and photoluminescence spectra (PL) were used to characterize and analyze the prepared samples. The experimental results and density functional theory calculations demonstrate that hole doping can be formed in Bi4NbO8Cl by inserting zinc into the niobium site, and the photocatalytic activity can be improved by introducing additional holes into Bi4NbO8Cl. The photogenerated hole (h+) is considered to be the main active species to degrade trypan blue (TB) through trapping experiments. The optimal photocatalyst of Bi4Nb0.8Zn0.2O8Cl exhibits excellent photocatalytic activity in degradation of trypan blue under visible light irritation. Moreover, a possible photocatalytic degradation mechanism is discussed according the experimental and analytical results.

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Section: Possible Photocatalysis Mechanismmentioning

confidence: 86%

Hole Doping to Enhance the Photocatalytic Activity of Bi4NbO8Cl

Sun

Han

et al. 2020

Catalysts

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“…However, the wide band gap of semiconductors and the slow rate of photogeneration of electron-hole pairs causes low quantum efficiency restricting the photocatalytic efficiency under visible light [17][18][19]. Bi-based photocatalysts including Sillén structures BiOX (X = Cl, Br, I) [20], Aurivillius structure Bi 2 WO 6 [21], Bi 2 MoO 6 [22], Bi 3 TiNbO 9 [23], and Sillén-Aurivillius structure Bi 4 NbO 8 Cl [24], Bi 4 Ti 0.5 W 0.5 O 8 Cl [25] have a unique valence band formed by hybridization of Bi-6s and O-2p orbitals [26] resulting in remarkable photocatalytic activity. Among the conventional Bi-based photocatalysts, Sillén-Aurivillius structure of photocatalysts consist of halide, fluorite and perovskite slabs [27].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Sillén-Aurivillius Layered Oxide Bi7Fe2Ti2O17Cl with Efficient Photocatalytic Performance for Degradation of Tetracycline

Fang

Chen

et al. 2022

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The development of an efficient and environment-friendly photocatalyst for antibiotics degradation is of great significance and still remains a major challenge. Herein, a novel Sillén-Aurivillius layered oxide Bi7Fe2Ti2O17Cl is successfully synthesized via a one-step flux route (noted as F-BFTOC) and solid-state reaction (noted as S-BFTOC). The as-prepared F-BFTOC manifests the enhanced visible-light photocatalytic performance towards tetracycline (TC) degradation compared with Bi4NbO8Cl and its degradation efficiency reaches 90% within 90 min. Additionally, the proposed degradation pathway and photocatalytic mechanism are systematically investigated by liquid chromatography tandem-mass spectrometry (HPLC-MS), active species trapping test, electron spin resonance (ESR) and first-principles calculations. The superior degradation of antibiotics is primarily derived from the photo-generated h+, and radical ·O2− as the dominant active species. More importantly, the F-BFTOC exhibits excellent cycle stability and TC is ultimately transformed into non-toxic open-loop products. Simultaneously, Rhodamine B (RhB) as a typical organic pollutant is further employed to evaluate the photocatalytic activity of F-BFTOC, and 98% of the degradation efficiency is achieved. BFTOC as a multifunctional photocatalyst for pollutant degradation offers a new insight for Sillén-Aurivillius photocatalytic in the field of water purification.

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Flux synthesis of Bi2MO4Cl (M = Gd and Nd) nanosheets for high-efficiency photocatalytic oxygen evolution under visible light

Han

Zhang

2022

J Mater Sci

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A New Bi-Based Oxychloride Bi4Ti0.5W0.5O8Cl as a Photocatalyst

Cited by 10 publications

References 24 publications

Hole Doping to Enhance the Photocatalytic Activity of Bi4NbO8Cl

Hole Doping to Enhance the Photocatalytic Activity of Bi4NbO8Cl

Facile Synthesis of Sillén-Aurivillius Layered Oxide Bi7Fe2Ti2O17Cl with Efficient Photocatalytic Performance for Degradation of Tetracycline

Flux synthesis of Bi2MO4Cl (M = Gd and Nd) nanosheets for high-efficiency photocatalytic oxygen evolution under visible light

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