ACS Applied Energy Materials
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2023
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IF 6.4
Zhifang Feng,Bona Zhang,Peijun Ji,Ruiyuan Hu,Bin Gao,Xiaofeng Wang,Yu-Lan Meng,Xue-Zhi Song,Zhenquan Tan
Bi2O3 is increasingly used in supercapacitors because of its high theoretical specific capacitance, but poor inherent conductivity and poor ion diffusion limit its actual capacitance. Therefore, the rational design of the surface and structure of Bi2O3 is the key to improve the specific capacitance of Bi2O3. Here, we report the fabrication of high-performance negative electrodes from Bi2O2CO3 nanosheets wrapped around Bi2O3 arrays (Cu foam@Bi2O3@Bi2O2CO3) by a combination of electrical substitution, oxidative calcination, and hydrothermal methods. The realized Cu foam@Bi2O3@Bi2O2CO3 presents a surface cross-linked laminar structure, which shortens the electrolyte penetration path. The direct replacement growth of Bi on copper substrates to obtain subsequent composites allows for enhanced adhesion between the electrode material and the collector, facilitates charge transfer to the electrode material, and achieves ultrahigh loadings (13.2 mg cm–2). In addition, the constructed asymmetric supercapacitor has a maximum energy density of 1.6 mW h cm–2 (45.5 W h kg–1) at a power density of 6.2 mW cm–2 (175.9 W kg–1). This work provides a simple design strategy to enhance the electrochemical performance of Bi2O3.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 9
·1-9
·
IF 5.3
Si Zhongzhou,Shao Rong,Li Ting,Yang Minghui
Photoelectrochemical biosensor based on Bi 2 S 3 /Bi 2 O 2 CO 3 heterojunction as photoelectrically active material and lactate oxidase was constructed for sensitive detection of lactic acid in serum. Topological transformation method was utilized to prepare Bi 2 S 3 /Bi 2 O 2 CO 3 composites, which can generate electron–hole pairs triggering photoelectrochemical reactions under light illumination. The Bi 2 S 3 /Bi 2 O 2 CO 3 heterojunction effectively promoted the separation and transportation of photogenerated electrons and holes, leading to improved photoelectric conversion efficiency. Lactic acid is catalyzed by lactate oxidase to generate H 2 O 2 , which reacts with photogenerated holes, leading to photocurrent increase, achieving quantitative detection of lactic acid. The prepared biosensor has a wide detection range for lactic acid from 0.01 mM to 10 mM, with detection limit as low as 0.006 mM. In addition, the detection of lactic acid in serum samples further validated the potential application of the sensor. Graphical abstract
研究领域:
生物传感器
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临床检验
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纳米材料应用
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光电化学分析
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生物医学检测
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DOI
PubMed
高影响因子
ACS Omega
·
2019
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IF 2.584
Junlei Zhang,Zhendong Liu,Zhen Ma
Bi2O2CO3/Bi2MoO6 heterojunction catalysts were prepared by treating Bi2MoO6 sheets with aqueous NaHCO3 solutions at room temperature. All the Bi2O2CO3/Bi2MoO6 heterojunctions exhibited higher activities than pristine Bi2MoO6 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, N2 adsorption–desorption, Fourier transform infrared spectroscopy, and UV–vis spectroscopy. The higher activity of Bi2O2CO3/Bi2MoO6 than pristine Bi2MoO6 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 (•O2–) were found to be the main active species. The good reusability of Bi2O2CO3/Bi2MoO6 was testified by cycling degradation of RhB and tetracycline hydrochloride.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
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IF 5.3
Amin Jv,Lina Wu,Jiale Lu,Bo Feng,Guangbo Che,Renquan Guan,Yufei Zhang,Chunbo Liu,Jiankang Yu,Tiantian Sun
In the past few decades, photocatalytic technology has made significant contributions to addressing the environmental pollution and energy crisis faced by the human society in the 21st century. The key to photocatalytic technology lies in the development of efficient photocatalysts, with the short lifetime of photogenerated charge carriers posing a major bottleneck to photocatalytic efficiency. This work presents the fabrication of a BiOBr/Bi2O2CO3 heterojunction photocatalyst with an efficient charge transfer interface through the incorporation of surfactants and calcination treatment during the BiOBr synthesis process. The in situ construction strategy enables efficient charge transfer between BiOBr and Bi2O2CO3, thereby prolonging the lifetime of photogenerated carriers. By incorporating surfactants alone, the degradation rate of tetracycline by the BiOBr/Bi2O2CO3 heterojunction photocatalyst with optimal activity is increased by over two times compared with that by BiOBr alone. Furthermore, LC–MS and quantitative structure–activity relationship analysis confirmed a significant reduction in the toxicity of intermediates generated during the photocatalytic process in the environment. Detailed analysis of the mechanism behind the enhanced photocatalytic activity is provided in this study. This research offers a novel approach for the in situ construction of heterojunction interfaces with efficient charge transfer capabilities.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2017
·
IF 3.387
Yuan Bian,Yongjin Ma,Yanyang Shang,Pengfei Tan,Jun Pan
Bi 2 O 2 CO 3 with a narrow band gap ( Eg ∼ 2.93 eV) was self-assembled by Bi 2 O 2 CO 3 nanosheets via a hydrothermal method, and the β-Bi 2 O 3 /Bi 2 O 2.33 @Bi 2 O 2 CO 3 composites were further fabricated using Bi 2 O 2 CO 3 as template by slow thermal decomposition for 4 h, described as: Bi 2 O 2 CO 3 → β-Bi 2 O 3 /Bi 2 O 2.33 @Bi 2 O 2 CO 3 (300 °C) → β-Bi 2 O 3 /Bi 2 O 2.33 (320 °C) → β-Bi 2 O 3 (350 °C). Deep investigation towards the generation and existence of β-Bi 2 O 3 and Bi 2 O 2.33 on the surfaces and interfaces of Bi 2 O 2 CO 3 were also carefully conducted by XRD, HRTEM and XPS analysis. In comparison with pure Bi 2 O 2 CO 3 , β-Bi 2 O 3 /Bi 2 O 2.33 @Bi 2 O 2 CO 3 displayed superior photocatalytic degradation efficiency and stability to cationic dyes under visible-light irradiation. Especially, the as-prepared BOC–300 °C with relatively high specific surface area (12.11 m 2 g −1 ) could entirely remove Rh-B and MB in 45 min and 60 min, which were approximately 4.7 and 6.6 times as high as that of pure Bi 2 O 2 CO 3 , respectively. Further study demonstrated that the enhanced photocatalytic degradation efficiency of β-Bi 2 O 3 /Bi 2 O 2.33 @Bi 2 O 2 CO 3 is surely owing to the well matched band gap and p - n heterojunction, which made it possible for much faster charge transfer rather than electron-hole pairs recombination process.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Junke Li,Mei Li,Youji Li,Xin Guo,Zhiliang Jin
The exploration of multiple composite with heterojunction structures to replace single catalysts with insufficient capacity is significant for the photocatalytic evolution of high-yield hydrogen. In this case, the Mo 2 S 3 /Bi 2 O 2 CO 3 composite with a unique n-n heterojunction and two-dimensional (2D) spatial structure was successfully prepared for the first time using the hydrothermal-physical mixture method. The percentage of Bi 2 O 2 CO 3 in the composite can be easily adjusted by changing the amount of Bi 2 O 2 CO 3 introduced into the physical mixing process. With a mass percentage of Bi 2 O 2 CO 3 attained 3% to Mo 2 S 3 , the composite Mo 2 S 3 /Bi 2 O 2 CO 3 with n-n heterojunction exhibited the highest photocatalytic effect among all as-prepared samples, with a photocatalytic effect 5 times higher than pure Mo 2 S 3 . The presence of Bi 2 O 2 CO 3 and the synergistic interactions of n-n heterojunction significantly reduced the dispersity of short-rod shaped Mo 2 S 3 , as well as the recombination of photogenerated charge carriers. As a result, electron circulation was improved, and photocatalytic hydrogen evolution activity under visible light was improved. In addition to improving the photocatalytic hydrogen evolution effect, the composite Mo 2 S 3 /Bi 2 O 2 CO 3 has been found to have excellent stability, which is a noteworthy feature. A series of characterization results and semiconductor energy band structure were used to investigate the possible photocatalytic hydrogen evolution mechanism in the Eosin-Y (EY) sensitized Mo 2 S 3 /Bi 2 O 2 CO 3 system.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Qi Wang,Chenlu Zhang,Hong Wu,Qiaoyuan Gao,Ran Duan,Chuncheng Chen
Bi 2 O 2 CO 3 was co-decorated by β-phase AgI and Bi 2 O 3 forming visible-light-active AgI(β)/Bi 2 O 3 (β)-Bi 2 O 2 CO 3 composite via simply calcining AgI/Bi 2 O 2 CO 3 . The calcination temperature and time played vital role in regulating the structure as well as photocatalytic performance. Optimal AgI(β)/Bi 2 O 3 (β)-Bi 2 O 2 CO 3 was obtained after 325 ◦ C calcination for 2 h with 5% AgI. The ratio of Bi 2 O 3 to Bi 2 O 2 CO 3 was estimated to be ca. 3:1 on the catalyst surface. The transformation process for n -type Bi 2 O 2 CO 3 to p-type Bi 2 O 3 (β) was monitored and verified by flat band potential measurements. Due to the presence of p-n junctions between p-type Bi 2 O 3 (β), n -type AgI(β) and Bi 2 O 2 CO 3 , the optimized ternary composite displayed enhanced photocurrent density and reduced charge transfer resistance, which were beneficial for photocatalytic applications. Despite of decreased specific surface area, dramatically enhanced photocatalytic performance can be observed for simultaneous removal of Cr(VI) and phenol . For example, the estimated k Cr(VI) and k phenol on AgI(β)/Bi 2 O 3 (β)-Bi 2 O 2 CO 3 were 3.3 and 2.2 times relative to those on uncalcined AgI/Bi 2 O 2 CO 3 , respectively. The optimized composite also displayed good stability in 4 successive cyclic runs.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2014
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IF 6.007
Ruiping Hu,Xin Xiao,Shunheng Tu,Xiaoxi Zuo,Junmin Nan
Novel flower-like heterostructured β-Bi 2 O 3 /Bi 2 O 2 CO 3 microspheres are synthesized by calcining a Bi 2 O 2 CO 3 self-sacrifice precursor for the visible-light photocatalytic degradation of o -phenylphenol (OPP, is a widely used fungicide and preservative agent). The Bi 2 O 2 CO 3 microspheres are firstly prepared under hydrothermal conditions, and then converted to Bi 2 O 3 by thermal treatment. With increasing the calcining temperature from 250 to 500 °C, an in situ stepwise decomposition reaction take place during the course of calcination , described as: Bi 2 O 2 CO 3 → β-Bi 2 O 3 /Bi 2 O 2 CO 3 → β-Bi 2 O 3 → β-Bi 2 O 3 /α-Bi 2 O 3 → α-Bi 2 O 3 . The β-Bi 2 O 3 /Bi 2 O 2 CO 3 microspheres synthesized at 300 °C exhibit excellent photocatalytic activity under visible-light irradiation, which can degrade 99.8% OPP in 45 min. And the degradation rate of the heterostructured photocatalyst is approximately 2, 2.6, 6, 13, 80, and 827 times higher than that of single β-Bi 2 O 3 , mixed β-Bi 2 O 3 and Bi 2 O 2 CO 3 , commercial β-Bi 2 O 3 , α-Bi 2 O 3 , N-doped TiO 2 , and Bi 2 O 2 CO 3 , respectively. The superior photoreactivity of the β-Bi 2 O 3 /Bi 2 O 2 CO 3 is attributed to the enhanced charge separation and transfer due to the formation of p–n junction with large heterojunction interface, favorable band gap energy (2.27 eV), relatively high specific surface areas (12.5 m 2 g −1 ), and flower-like hierarchical micro/nano structures. In addition, the degradation intermediates including ethyl phenethyl ether, phenyl acetaldehyde, and phenylacetic acid are identified. And the results also reveal that the photogenerated holes and •O 2 − radicals are primarily reactive species in the photocatalytic system, which are the key factors responsible for the nearly complete mineralization of OPP.
研究领域:
材料科学
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环境科学
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光催化
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DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2019
·Vol. 11
·期 8
·1093-1103
·
IF 0
Wu Yujie,Zhang Yuting,Gong Yinyan,Niu Lengyuan,Li Can,Liu Xinjuan
Photocatalysis is a green and effective way to degrade antibiotic remnants, one of the main persistent and ecotoxic sources for aquatic environment pollution. Developing highly efficient photocatalysts is a key issue for large-scale application of this technique. In this work, we showed
that layered heterostructure photocatalyst composed of defective g-C3N4 by RbCl-assisted thermal polymerization of melamine (RbCN)/Bi2O2CO3 (BOC) appeared as a promising candidate for photocatalytic degradation of antibiotic pollutants.
The as-prepared RbCN/BOC heterostructure photocatalyst exhibited better photocatalytic activity than bare BOC, and can degrade 84% of tetracycline hydrochloride within 60 min under illumination. The observed improvement is ascribed to enhanced transfer and restrained recombination of free
electron–hole pairs generated under light irradiation as a result of staggered band alignment of RbCN/BOC, extended optical response region, large interface area and possibly more reactive sites associated with RbCl-assisted in-plane structural modification of g-C3N4.
研究领域:
环境科学
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材料科学
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DOI
Nanomaterials
·
2020
·Vol. 10
·期 9
·1795
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IF 4.324
Junping Ding,Huanchun Wang,Yidong Luo,Yushuai Xu,Jinsheng Liu,Ruichu Lin,Yuchen Gao,Yuanhua Lin
In work, (002) oriented flower-like Bi2O2CO3(BOC) composites are synthesized by a facile chemical route and carbon quantum dots (CQDs) are modified on their surfaces through a hydrothermal method. The synthesized samples (CQD/BOC) are characterized by X-ray diffraction (XRD), SEM, X-ray photoelectron spectroscopy (XPS), UV-Vis diffuser reflectances (DRS), BET and TEM/HRTEM. The morphologies of CQD/BOC composites are the flower-like shapes, the irregular flaky structures and the fine spherical particles of CQDs attached. Photocatalytic performances were investigated in terms of removing gaseous toluene at a concentration of 94.3ppm in air, with the assistance of CQD/BOC under artificial irradiation. Our results show that CQDs modified (002) oriented Bi2O2CO3exhibits good photocatalytic activity for toluene decomposition, which can be attributed to the enhanced efficient charge separation. A certain ratio composite photocatalyst (BOC-CQD-15) shows a toluene removal rate of 96.62% in three hours, as well as great stability. CO2was verified to be the primary product. The oriented flower-like Bi2O2CO3with carbon quantum dots on the surface shows great potential in the field of solar driven air purification.Keywords:Bi2O2CO3;carbon quantum dots (CQDs);crystal orientation;toluene removal;photocatalysis
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Applied Sciences-Basel
·
2022
·Vol. 12
·期 23
·12500
·
IF 2.838
Xiaoyan Wang,Lu Chen,Changfu Li,Yongchao Xiao,Yuchen Gao,Yaochun Liu,Yuanhua Lin,Junping Ding
Featured ApplicationThis work may provide potential applications in indoor air purification for the removal of volatile organic compounds.AbstractActivated carbon (AC) is one of the most used air purification materials with excellent adsorption capacity for volatile organic compounds (VOCs). In this work, Bi2O2CO3(BOC) nanomaterials, as a photocatalysis component, are grown on the surface of the AC to construct BOC/AC composites. The as-synthesized composites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and N2adsorption/desorption measurements. The results demonstrate that flower-like BOC can be grown in situ on the surface of AC. The photocatalytic properties for the removal of gaseous toluene (50.0 ppm) in air over the BOC/AC composites were investigated under simulated sunlight illumination. The results show that the BOC/AC photocatalyst can effectively degrade toluene to CO2and H2O, with more than 90% degradation in 3 h. The excellent photocatalytic performance of the BOC/AC composite catalyst can be ascribed to the synergistic effect of the adsorption ability of AC and photocatalytic activity of both BOC nanosheets and AC. This work may provide useful guidance for indoor air purification, particularly for harmful trace gases such as VOCs.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Catalysts
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2020
·Vol. 10
·期 4
·389
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IF 3.52
Junping Ding,Huanchun Wang,Yidong Luo,Yushuai Xu,Jinsheng Liu,Yuanhua Lin
Layer-structured Bi2O2CO3is a novel photocatalyst for eliminating environmental pollutants. In this work, Bi2O2CO3nanosheets were synthesized by hydrothermal methods, followed by annealing in nitrogen. (002) oriented Bi2O2CO3nanosheets were obtained and characterized by XRD, SEM, XPS, BET and UV-Vis diffuse reflectance spectra. Photocatalytic properties were investigated by toluene removal in air, with the assistant of Bi2O2CO3nanosheets under artificial irradiation. Our results show that Bi2O2CO3annealed in nitrogen exhibited high full-light-driven photocatalytic activity for toluene photocatalytic decomposition, which may be ascribed to facet orientation evolution during the annealing process and enhanced efficient charge separation. The sample annealed at 150 °C for 8 h (BOC-150-8 h) showed high stability and the highest toluene removal rate, which was up to 99%. The final degradation products were detected by gas chromatography–mass spectrometer (GC-MS) and CO2was verified to be the primary product. Photocatalytic mineralization of toluene in air over Bi2O2CO3was proposed. This work may provide a foundation for application of annealed Bi2O2CO3in indoor air purification.Keywords:Bi2O2CO3;toluene decomposition;crystal orientation;volatile organic compound (VOCs);photocatalysis
研究领域:
材料科学
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环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）