INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2024
·Vol. 26
·期 1
·196
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IF 4.9
Yuan-Jun Song,Xiao-Ying Bi,Peng Xia,Fei Sun,Ze-Xian Chen,Xiao-Yang Zhang,Tong Zhang
This study presents a facile one-pot synthesis method to fabricate BiFeO3-Bi25FeO40-Bi2O3heterojunction photocatalysts with controllable compositions and pure phases. Three different binary heterojunctions (BiFeO3/Bi25FeO40, BiFeO3/Bi2O3, and Bi25FeO40/Bi2O3) and a ternary BiFeO3/Bi25FeO40/Bi2O3heterojunction were formed, all exhibiting significantly enhanced photocatalytic performance for the degradation of methylene blue (MB) and phenol under visible light irradiation, outperforming the individual compositions. Notably, the BiFeO3/Bi25FeO40heterojunction achieved the highest degradation efficiency (93.68% and 83.3% for MB and phenol, respectively) as well as excellent stability. Impressively, the phenol degradation efficiency of BiFeO3/Bi25FeO40was even over twice that of BiFeO3and Bi25FeO40, and four times higher than that of Bi2O3. The enhanced photocatalytic activity of the BiFeO3/Bi25FeO40heterojunction is primarily attributed to the advantageous S-scheme band alignments that facilitate efficient charge separation and enhance redox capabilities. While other heterojunctions also exhibited improved MB and phenol degradation efficiency, each unique combination of materials led to distinct electronic structures and diverse reaction mechanisms. The simplicity and scalability of the synthesis method, combined with the remarkable photocatalytic performance of these BiFeO3-Bi25FeO40-Bi2O3heterojunction materials, position them as highly promising candidates for applications in environmental remediation and solar energy conversion.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
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2021
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IF 7.086
Zhi-Peng Ma,Linnan Zhang,Xue Ma,Yu-Hang Zhang,Fa-Nian Shi
High electron transfer rates and a higher number of electron transfer active sites play important roles in inhibiting the recombination of photogenerated electron-hole pairs. In the experiments described in this article, the g-C 3 N 4 /BC/Bi 25 FeO 40 composite material was prepared to use biochar (BC) as the conductive channel. The presence of BC significantly increases the electron transfer rate due to its excellent electrical conductivity and can provide more electron transfer active sites. At the same time, BC provides a larger surface area and has a loose porous structure, which lead to excellent adsorption performance. Based on various characterization results, it was confirmed that the Z-scheme heterojunction was successfully constructed between g-C 3 N 4 and Bi 25 FeO 40 . The photocatalytic experiment results showed that the degradation efficiency of g-C 3 N 4 /BC/Bi 25 FeO 40 on the tetracycline hydrochloride (TCH) could reach 92.2% within 60 min. Parameters such as circulation stability, pH value of the solution and the amount of composite materials were studied. The synthesized composite material has good reusability and high efficiency in a wide pH range of 3–11. Its excellent photocatalytic activity is attributed to the formation of an effective Z-scheme heterostructure, as well as the rapid photoelectron transfer and excellent adsorption capacity of BC. This work provides a way to design new photocatalysts using semiconductor composite materials and BC materials.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2020
·
IF 3.085
Yan Huang,Li-chao Nengzi,Xiaoling Li,Lezu Meng,Qingqing Song,Xiuwen Cheng
In the study, cuprous oxide (Cu 2 O) combined with sillenite bismuth ferrite (Bi 25 FeO 40 ) was successfully fabricated through hydrothermal strategy. Subsequently, physicochemical properties of Cu 2 O/Bi 25 FeO 40 were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM), N 2 adsorption/desorption, X-ray photoelectron spectroscopy measurements (XPS), UV visible diffuse reflectance spectroscopy (DRS). The experimental results indicated that Cu 2 O/Bi 25 FeO 40 exhibited a significantly enhanced photocatalytic activity , which 85.0% of sulfamethoxazole was decomposed in 120 min under irradiation. Afterwards, scavenger experiments have been carried out to determine the contributions of different species and h + and H 2 O 2 were manifested to be staple reactive species during the process of sulfamethoxazole (SMX) degradation. In addition, Cu 2 O/Bi 25 FeO 40 nanocomposite showed good stabilities. And the degradation efficiency of SMX still reached 84.9% after five recycle experiments. Furthermore, some plausible degradation pathways of sulfamethoxazole were detected by a high-performance liquid chromatography-tandem mass spectrometry. Finally, the enhanced visible light photocatalytic mechanism was proposed reasonably. Eventually, this study provides a novel strategy to prepare catalyst which could be potentially applied in emerging pollutants elimination.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Feihui Li,Jingkuo Zhou,Chunjuan Gao,Haixia Qiu,Yunlan Gong,Jinghan Gao,Yu Liu,Jianping Gao
In the present work, magnetically recyclable Bi/Bi 25 FeO 40 -C nanocomposites were synthesized through a one-step hydrothermal approach and then analyzed. The analysis results manifested that non-toxic and biodegradable sodium alginate takes a key role in successful preparation of Bi/Bi 25 FeO 40 -C. Sodium alginate can totally suppresses the formation of BiFeO 3 because it changes the alkalinity of the medium, and at the same time Fe precursor greatly restrains the reduction of Bi 3+ to Bi by sodium alginate, so the final product is Bi/Bi 25 FeO 40 with a small amount of Bi instead of Bi, BiFeO 3 or Bi/BiFeO 3 . Bi/Bi 25 FeO 40 -C showed enhanced photocatalytic activity in hydrogen generation as compared with pure Bi 25 FeO 40 due to the surface plasmonic resonance effect of Bi and electron conductivity of carbon, which promote electron-hole separation and light absorption of the Bi/Bi 25 FeO 40 -C, resulting in high photocatalytic efficiency. The Bi/Bi 25 FeO 40 -C even exhibited higher catalytic efficiency than noble metallic nanoparticles and good reusability in p-nitrophenol reduction. This work provides a green way to prepare Bi/Bi 25 FeO 40 -C for catalytic reactions.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2023
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IF 5.9
Wenjuan Zou,Jintao Dong,Mengxia Ji,Bin Wang,Yingjie Li,Sheng Yin,Huaming Li,Jiexiang Xia
Though heterogeneous Fenton-like reactions possess various characteristics such as a wide application range and mild reaction conditions, their reactivity is currently restricted by unsatisfactory H2O2 decomposition efficiency and low pH adaptation. Hence, Bi25FeO40 nanoparticles prepared via the mechanical ball-milling method (Bi25FeO40-B) with extensive oxygen vacancies possess high reactive oxygen species production performance by enhancing the H2O2 decomposition for tetracycline hydrochloride oxidation and Cr(VI) reduction. H2O2 decomposition efficiency can reach 55.3% in the presence of the Bi25FeO40-B catalyst, which is much higher than that of Bi25FeO40 prepared by the traditional hydrothermal method (23.8%). The Bi25FeO40-B/H2O2 heterogeneous Fenton system demonstrates efficient performance for simultaneous oxidation of tetracycline hydrochloride (TCH) and reduction of Cr(VI). It is capable of removing 75.2% of 50 mg/L TCH and 93.0% of 20 mg/L Cr(VI) at pHinitial = 7, respectively. Abundant oxygen vacancies on the surface of Bi25FeO40-B nanoparticles due to the nanometer size effect can accelerate the decomposition of H2O2 to promote the formation of reactive oxygen species for removing the target organic pollutants and reduction of Cr(VI). Consequently, this work provides a strategy for the preparation of oxygen-rich Bi25FeO40 catalysts for efficient degradation of contaminants and depicts the bright future of Fe-based metal oxides with oxygen vacancies on H2O2 activation in Fenton-like reactions.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Xufei Li,Yanling Qiu,Zhiliang Zhu,Hua Zhang,Daqiang Yin
Constructing Z-scheme heterojunction has been treated as a superior strategy to boost the photocatalytic activity of photocatalysts for the removal of organic contaminants. Herein, a novel recyclable Z-scheme g-C 3 N 4 /carbon nanotubes/Bi 25 FeO 40 (CN/CNT/BFO) heterojunction photocatalyst was successfully fabricated adopting a facile hydrothermal technique with ultrasonic assistance, in which CNT acted as an electron transfer bridge between CN and BFO. As a result, the degradation efficiency of tetracycline (TC) over optimal CN/CNT/BFO heterojunction reached 87.9% after 120 min of visible light exposure, which was higher than that of pristine CN, BFO and CN/BFO. The mechanism analysis indicated that the facilitated photocatalytic performance was associated with the CNT mediated Z-scheme heterojunction, leading to an outstanding separation of photoexcited electron-hole pairs as well as a high redox ability in the process of photocatalysis. Moreover, the CN/CNT/BFO heterojunction exhibited wide pH adaptability, excellent magnetic recyclability and stability. Finally, the possible degradation pathways of TC over CN/CNT/BFO heterojunction were proposed through the determined degradation intermediates. This research could provide an insight into the construction of promising and novel CNT mediated Z-scheme heterojunction photocatalysts for environmental applications.
研究领域:
环境科学
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材料科学
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化学
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光催化
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产品关联
DOI
高影响因子
Journal of Cleaner Production
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2022
·
IF 11.072
Tingjin Jiang,Yang Wang,Zichang Guo,Haopeng Luo,Chuanxiang Zhan,Yaojin Wang,Zhe Wang,Fang Jiang,Huan Chen
Piezoelectric catalysis based on the polarization of piezoelectric materials is a promising technology for environmental pollutant treatment. Developing effective piezoelectric catalysts and clarifying the reaction mechanism are crucial to the application of piezoelectric catalysis. Herein, a unique strategy of photochemical self-etching of Bi 25 FeO 40 was used to prepare a piezoelectric catalyst of Bi 25 FeO 40 /Bi 2 O 2 CO 3 . During the photochemical process, methanol was oxidized to formaldehyde, and then Bi species on the surface of Bi 25 FeO 40 reacted with formaldehyde to form Bi 2 O 2 CO 3 . As a lead-free piezoelectric catalyst, the Bi 25 FeO 40 /Bi 2 O 2 CO 3 composite possessed excellent activity for the degradation of 4-chlorophenol under ultrasonic vibration, and the degradation efficiency was more than 90% within 120 min. Introducing Bi 2 O 2 CO 3 onto the surface of Bi 25 FeO 40 can significantly promote the piezoelectric catalytic activity of Bi 25 FeO 40 via the effect of built-in electric fields. It was also found that ·OH and ·O 2 − are the main active species that are responsible for the degradation of 4-CP. The results that are presented here can extend the piezoelectric application of bismuth ferrate , and the strategy for building up the heterojunction is helpful for the preparation of other Bi-containing piezoelectric catalysts.
研究领域:
环境科学
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催化材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yue Wu,Yangwen Chen,Shouqiang Huang,Guobiao Li,Shunping Sun,Yong Jiang,Guobin Liang,Songjian Zhao,Weiqiao Liu
The chloride (Cl − ) ions in wastewater are difficult to remove, since there is a lack of effective and recyclable chloride removal agents. In this study, the bismuth ferrites (BFO) are first explored as chloride removal agents, and their oxidation or precipitation effects on the Cl − removal are studied. In the BFO samples, the crystal phases of BiFeO 3 and Bi 2 FeO 4 have very limited contributions to the Cl − removal, while the enhanced removal ability is exhibited with the increase of Bi 25 FeO 40 . When the mass percentage of Bi 25 FeO 40 reaches 70%, high Cl − removal efficiencies of 80–90% are achieved, which even exceeds 95% for pure Bi 25 FeO 40 . The morphology and structure characterizations reveal that the excellent Cl − removal performance of Bi 25 FeO 40 is determined by its unstable chemical structure due to the sharing of Bi 5+ and Fe 3+ ions in the tetrahedral positions. The density of states and electron localization function of Bi 25 FeO 40 demonstrate that its Fe and O bonding is weaker than those of BiFeO 3 and Bi 2 FeO 4 , resulting in the easier breaking of the Fe 3+ /Bi 5+ -O bonds to release Bi 5+ ions, which have oxidation ability for the formation of OH and Cl radicals to enhance the Cl − removal efficiency.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Runjie Wu,Hongying Hou,Xianxi Liu,Congcong Bai,Xiaohua Yu,Shizhao Xiong
Poor conductivity limited the widespread application of metal oxide electrodes in the supercapacitors. High conductive metal sulfides facilitated the rapid ionic/electronic transfer and accelerated the reaction kinetics. Herein, a series of sulfurized Bi 2 Fe 4 O 9 /Bi 25 FeO 40 composites —-Bi 2 Fe 4 O 9 /Bi 25 FeO 40 /x%Bi 2 S 3 ( x = 0, 8, 16, 30) were synthesized and optimized with Bi 2 O 3, Fe 2 O 3 and S as the raw materials by solid phase reaction. The as-prepared Bi 2 Fe 4 O 9 /Bi 25 FeO 40 /x%Bi 2 S 3 ( x = 0, 8, 16, 30) powders appeared as the irregular particles with the sizes of 0.78–4.27 μm. Desirably, when x was 16, Bi 2 Fe 4 O 9 /Bi 25 FeO 40 /16%Bi 2 S 3 electrode exhibited a specific capacitance of 597.0 F/g and 132.5 F/g at 1.0 A/g in the three-electrode and two-electrode systems respectively, much higher than those of Bi 2 Fe 4 O 9 /Bi 25 FeO 40 /x%Bi 2 S 3 ( x = 0, 8, 30). Furthermore, the corresponding energy density was 73.6 Wh/kg at the power density of 999.8 W/kg and the capacity retention was 89.7% after 2000 cycles at 2.0 A/g. The joint contributions of high conductivity and low theory capacitance of Bi 2 S 3 phase may be responsible for the desirable high capacitance of optimal Bi 2 Fe 4 O 9 /Bi 25 FeO 40 /16%Bi 2 S 3 electrode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2022
·
IF 4.969
Yan Wang,Kangkang Miao,Weixing Zhao,Hongbo Jiang,Liangliang Liu,Dengwei Hu,Bin Cui,Yaping Li,Yue Sun
In this study, nanoparticle-assembled Bi 25 FeO 40 materials were synthesized by a novel and simple process, and their microstructure was regulated by different methods of adding Bi 3+ and Fe 3+ . The novel nanoparticle-assembled tetrakaidekahedron Bi 25 FeO 40 materials exhibited more oxygen vacancy and larger specific surface area than irregular or cubic-like Bi 25 FeO 40 microcrystals and revealed better photo-Fenton catalytic oxidation activity toward degrading Rhodamine B (RhB) pollutants. These novel materials activated H 2 O 2 in visible light to produce non-free radicals 1 O 2 and hole (h + ) active oxidative species that dominated the catalytic degradation of RhB. Complete degradation of RhB was achieved after 1 h. The possible reaction mechanisms of the photo-Fenton catalytic system are discussed in detail by radical scavenging tests, X-ray phosphorescence analysis, and electron paramagnetic resonance spectroscopy . The results provided a way to rationally explore and construct photo-Fenton catalysts for wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Shikai Xue,Xin Li,Lin Li,Shan Huang,Jinhua Luo,Haiyan Wang,Qiujun Lu,Guoxing Yin,Fuyou Du
The photocatalytic process is a promising, cost-effective, and environmentally friendly method for remediating environmental pollution. Unfortunately, practical applications have been limited by the shortage of highly efficient photocatalysts. To overcome this problem, a unique cactus-like Bi 12 O 17 Br 2 /Bi 2 O 3 /Bi 25 FeO 40 (BBF) was synthesized facilely by hydrolyzing of rod-like MOF (CAU-17/MIL-100(Fe)) precursor, and the ratio of photocatalyst was adjusted by controlling the hydrolysis time. In this photocatalyst, Bi 12 O 17 Br 2 and Bi 25 FeO 40 were dispersed in Bi 2 O 3 , as well as Bi 12 O 17 Br 2 and Bi 2 O 3 were attached to an S-type heterojunction. The developed BBF demonstrated high photocatalytic efficiency and exceptional stability in degrading five bisphenol pollutants. The photocatalytic degradation of bisphenol A (BPA) using BBF could reach up to 98.7% within 60 min under visible light irradiation. Further characterization demonstrated a significant improvement in the photogenerated charge transfer efficiency and confirmed the S-scheme structure of BBF. Additionally, the possible degradation pathways and the evolution of intermediate toxicity of BPA were discussed according to the intermediates detected in the photocatalytic reaction process.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Yang Liu,Hongguang Guo,Yongli Zhang,Weihong Tang,Xin Cheng,Wei Li
Sillenite bismuth ferrite (S-BFO) Bi 25 FeO 40 was synthesized by a hydrothermal process and firstly adopted for the activation of peroxymonosulfate (PMS). Multiple characterization was conducted for the morphology and physicochemical features of S-BFO. Degradation of aquatic levofloxacin (LVF) was thoroughly evaluated by using a coupled process for the decontamination of the typical emerging organics. Some crucial parameters for the activation kinetics as well as economic recyclability were examined with the detailed mechanism proposed. For the first time, singlet oxygen ( 1 O 2 ) was identified as the main reactive oxygen species through radical scavenging experiments, electron paramagnetic resonance spectroscopy (EPR) and HPLC-MS determination. Based on the XPS and EPR results, a catalytic mechanism is proposed concerning the parallel generations of 1 O 2 : (i) Bi 5+ is replaced by Bi 3+ , resulting in the formation of an oxygen vacancy in the lattice and an active oxygen (O ∗ ), which could produce 1 O 2 through the reactions with PMS; (ii) direct formation of 1 O 2 from radSO-5 generated by the interaction between Bi 5+ and PMS. This study demonstrates a novel catalyst for heterogeneous activation of PMS via a non-radical mechanism, which could be alternatively adopted in the decontamination in surface/ground water.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）