Room-temperature synthesis of BiOCl and (BiO) 2 CO 3 with predominant {001} facets induced by urea and their photocatalytic performance

Wu, Yao; Han, Qiaofeng; Wang, Li; Jiang, Xiaohong; Wang, Xin; Zhu, Jun

doi:10.1016/j.jece.2017.01.029

Cited by 16 publications

(4 citation statements)

References 28 publications

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“…The synthesis of semiconductor photocatalysts with highly exposed {001} facets has aroused scientific interest owing to special surface-dependent properties . To date, a large number of works reported that the highly exposed {001} facets can effectively improve the photocatalytic performance of photocatalysts, including BiOI, BiVO 4 , (BiO) 2 CO 3 , BiOBr, and TiO 2 . As a novel semiconductor, bismuth oxyiodide (BiOI) has drawn much attention due to its smaller band gap (1.7–1.83 eV) and higher photochemical stability. , BiOI has positive [Bi 2 O 2 ] 2+ layers and two slabs of negative I – .…”

Section: Introductionmentioning

confidence: 99%

Uniform Zn²⁺-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO

et al. 2019

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Highly exposed active facets and surface oxygen vacancies (OVs) are beneficial for the photocatalytic removal of various harmful organic compounds. In this study, uniform Zn2+-doped BiOI microspheres, assembled by ultrathin nanosheets with highly exposed {001} facets, with OVs were successfully synthesized for NO removal under visible light irradiation. The phase structure and chemical states are analyzed by means of X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The transmission electron microscopy observations reveal that replacing Bi3+ with Zn2+ can lead to the increased exposure of the {001} facets. X-ray photoelectron and electron paramagnetic resonance spectroscopy results confirm that low-state Zn2+ increases the number of OVs, indicating that an increased number of OVs and a reduced thickness of the nanosheets can enhance the photocatalytic activity for the removal of NO. The photo-oxidative removal efficiency of NO over 3%Zn-BiOI reaches 53.6% and remains highly stable (52.9%) for up to 210 min under visible light irradiation. The calculation of interface adsorption confirms that OVs and Zn2+ can not only offer a donor energy level to extend the solar response range but also act as adsorption sites for low concentration of NO and O2 to optimize the transmission capacity of surface charge carriers. Moreover, this work systematically explains the function of OVs and Zn2+ in the adsorption process of NO. The in situ Fourier transform infrared spectroscopy supports understanding of the photo-oxidative removal mechanisms of NO over Zn-BiOI: (i) the byproducts were bidentate nitrites (bi-NO2 –), chelate nitrites (ch-NO2 –), and bridging nitrites (br-NO3 –) in the dark condition and (ii) the final products were bridging nitrites and bidentate nitrites (bi-NO3 –) under visible light irradiation. OVs are found to play an important role both in the dark adsorption and photo-oxidative removal of NO by the 3%Zn-BiOI sample.

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Section: Introductionmentioning

confidence: 99%

Uniform Zn²⁺-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO

et al. 2019

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“…Their corresponding XRD patterns and SEM images are displayed in Figure b,c–f, respectively. In brief, the addition of Bi(NO 3 ) 3 ·5H 2 O to a basic aqueous medium leads to its hydrolysis, and the XRD pattern collected on the step-I intermediate shows the formation of BiONO 3 -type phases. , Upon the subsequent addition of Pb(NO 3 ) 2 (step-II) under constant ultrasonication, the former phase has vanished and a new phase, PbBiO 2 NO 3 , is formed. Its crystal structure can be viewed as [PbBiO 2 ] + layers intergrown with single NO 3 – layers along the c -axis (Figure a) .…”

Section: Results and Discussionmentioning

confidence: 99%

Room-Temperature Synthesis and Stable Na-ion Storage Performance of Two-Dimensional Mixed Lead–Bismuth Oxychloride

et al. 2021

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Two-dimensional (2D) mixed-cationic Sillén-type heterostructures have garnered widespread interest in energy conversion and storage applications. However, the current synthesis strategies to prepare them demand a high temperature, longer reaction durations, toxic chemicals, and a complex reaction setup, which hinder their large-scale applications. Herein, we unveil a new rapid room-temperature chemical precipitation route to prepare 2D-PbBiO2Cl within ∼45 min. X-ray diffraction (XRD) and scanning electron microscopy (SEM) mechanistic studies show that its formation proceeds through topotactic ion exchange from an analogous PbBiO2NO3 intermediate. As an anode material in the sodium-ion battery (NIB), this 2D structure displays a stable sodium storage performance (∼240 mAh g–1 for 450 cycles at 100 mA g–1). Most importantly, the combined electrochemical and in operando XRD studies reveal a distinct (de)sodiation process of the 2D-PbBiO2Cl in comparison with the reported Na–(Pb/Bi) phase diagram, which is ascribed to the mixed chemical character of the electrochemically formed nanoscale Bi-rich (Pb/Bi) alloy. This study highlights the feasibility of room-temperature synthesis of 2D mixed-cationic Sillén-type phases and stabilization of their nanoscale alloys, which can potentially exhibit a distinct electrochemical behavior.

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“…The numerous references cited above indicate that research along this direction is popular. However, Bi 2 O 2 CO 3 /Bi 2 MoO 6 photocatalysts have been seldom reported, − although Bi 2 O 2 CO 3 has been combined with other substances (e.g., Cu 2 O, Co 3 O 4 , ZnFe 2 O 4 , Bi, Au–Bi 2 O 3 , Bi 2 O 4 , , Bi 4 O 7 , Bi 2 S 3 , BiOCl, , BiOBr, BiOI, BiVO 4 , Bi 2 WO 6 , Ag 2 O, Ag 2 CO 3 , AgI, carbon quantum dots, and porphyrins) to form heterojunction photocatalysts . In general, the formation of heterojunction systems is an efficient way to design visible light-responsive photocatalysts. − …”

Section: Introductionmentioning

confidence: 99%

Facile Formation of Bi₂O₂CO₃/Bi₂MoO₆ Nanosheets for Visible Light-Driven Photocatalysis

Zhang

Liu

2019

ACS Omega

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Bi 2 O 2 CO 3 /Bi 2 MoO 6 heterojunction catalysts were prepared by treating Bi 2 MoO 6 sheets with aqueous NaHCO 3 solutions at room temperature. All the Bi 2 O 2 CO 3 /Bi 2 MoO 6 heterojunctions exhibited higher activities than pristine Bi 2 MoO 6 in the photocatalytic degradation of rhodamine B (RhB), methyl orange, and ciprofloxacin under visible-light irradiation, and the most active photocatalyst was found to be the one with a C/Bi molar ratio of ∼1/2.3. Relevant samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, N 2 adsorption–desorption, Fourier transform infrared spectroscopy, and UV–vis spectroscopy. The higher activity of Bi 2 O 2 CO 3 /Bi 2 MoO 6 than pristine Bi 2 MoO 6 is explained by the enhanced separation and transfer of photogenerated electron/hole pairs, as verified by transient photocurrent densities, photoluminescence spectroscopy, and electrochemical impedance spectroscopy. Photogenerated holes (h + ) and superoxide radical anions ( • O 2 – ) were found to be the main active species. The good reusability of Bi 2 O 2 CO 3 /Bi 2 MoO 6 was testified by cycling degradation of RhB and tetracycline hydrochloride.

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Room-temperature synthesis of BiOCl and (BiO) 2 CO 3 with predominant {001} facets induced by urea and their photocatalytic performance

Cited by 16 publications

References 28 publications

Uniform Zn²⁺-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO

Uniform Zn²⁺-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO

Room-Temperature Synthesis and Stable Na-ion Storage Performance of Two-Dimensional Mixed Lead–Bismuth Oxychloride

Facile Formation of Bi₂O₂CO₃/Bi₂MoO₆ Nanosheets for Visible Light-Driven Photocatalysis

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Room-temperature synthesis of BiOCl and (BiO) 2 CO 3 with predominant {001} facets induced by urea and their photocatalytic performance

Cited by 16 publications

References 28 publications

Uniform Zn2+-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO

Uniform Zn2+-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO

Room-Temperature Synthesis and Stable Na-ion Storage Performance of Two-Dimensional Mixed Lead–Bismuth Oxychloride

Facile Formation of Bi2O2CO3/Bi2MoO6 Nanosheets for Visible Light-Driven Photocatalysis

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Product

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Uniform Zn²⁺-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO

Uniform Zn²⁺-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO

Facile Formation of Bi₂O₂CO₃/Bi₂MoO₆ Nanosheets for Visible Light-Driven Photocatalysis