LANGMUIR
·
2023
·
IF 3.9
Shuyan Qi,Ling Guan,Ruiyan Zhang,Shanqiang Wu,Kaiyao Zhang
BiOCl/Bi2Fe4O9 photocatalyst was prepared by a coprecipitation–hydrothermal method. The heterojunction structure generated by the composite of BiOCl and Bi2Fe4O9 reduced the electron–hole recombination efficiency and improved the degradation rate of RhB. At 240 min, 20% BiOCl/Bi2Fe4O9 represented the excellent degradation effect on 10 mg/L RhB; the degradation efficiency reached 99.56%; and the reaction rate constant was 0.01534 min–1, which was 5.76 times and 6.06 times that of Bi2Fe4O9 and BiOCl, respectively. The main active substance of the photocatalytic degradation of dyes was superoxide radical O2–·. Five cycles of the experiment proved the relative stability of BiOCl/Bi2Fe4O9.
研究领域:
材料科学
·
环境化学
·
光催化
✓ 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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhiwei Yang,Guozhong Zheng,Xinyu Wang,Kecheng Wen,Xianchun Chen,Jing Zhang
Bi 2 Fe 4 O 9 is a ferroelectric material successfully implemented in advanced oxidation processes to activate peroxymonosulfate (PMS). However, the role of its ferroelectricity in activating PMS remains unclear, and the crucial effect of spontaneous polarization is largely overlooked. This study elucidates the highly efficient capability of ferroelectric Bi 2 Fe 4 O 9 to activate PMS from the perspective of ferrocatalysis. Through experimental and theoretical analysis, it is proposed that the intrinsic ferrocatalytic activity is attributed to the spontaneous polarization that promotes the PMS adsorption process and accelerates the electron transfer. Bi 2 O 2 and FeO 6 surfaces of Bi 2 Fe 4 O 9 accumulate charge because of spontaneous polarization and elongate the O-O bond of PMS. The interfacial electron transfer between Bi 2 Fe 4 O 9 and PMS results in the generation of •OH and •SO 4 - for rapidly removing organic contaminants. This study presents atomic-scale insight into possible active sites and mechanisms of ferrocatalytic PMS activation, which may enlighten the exploitation of more effective ferroelectric materials for water 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
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Yang Haibo,Dai Jingjing,Wang Lei,Lin Ying,Wang Fen,Kang Pan
A novel two-step approach consisting of hydrothermal process and subsequently selective etching has been developed to prepare flower-like three-dimensional porous Bi 2 Fe 4 O 9 spheres with good uniformity and highly photocatalytic performance. XRD patterns and SEM images reveal that the Bi 2 Fe 4 O 9 phase does not exhibit any changes after the etching process, and the crystal morphology evolves from micro-platelets to flower-like three-dimensional porous Bi 2 Fe 4 O 9 spheres by controlling the experiment parameters. The change of morphology will lead to the significant increase of specific surface area, which would be beneficial to the enhancement of photocatalytic performance owing to prominent absorption in the ultraviolet and visible light region. As compared to Bi 2 Fe 4 O 9 microplatelets, flower-like three-dimensional porous Bi 2 Fe 4 O 9 spheres exhibit excellent photocatalytic degration rate of methyl orange (MO).
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Lixiang Jian,Zhenyue Yu,Xiao Wu,Chunlin Zhao,Cong Lin,Min Gao,Xinan Chen,Yi Lin
Enterococcus faecalis ( E. faecalis ) is one of the primary bacteria that causes endodontic failure. The formation of biofilms in root canals makes it resistant to common antimicrobial irrigants. Here, single-phase Bi 2 Fe 4 O 9 (BFO) nanosheets are used to effectively eradicate E. faecalis biofilms via piezo-Fenton tandem catalysis. The nanosheet morphology endows BFO with excellent piezocatalytic ability, which boosts the production of H 2 O 2 under ultrasonic (US) stimuli. The in-situ generated H 2 O 2 further facilitates the iron-based Fenton reaction in BFO, thereby accelerating the destruction of membrane structures of E. faecalis biofilms. Moreover, the piezo-Fenton tandem catalysis only requires an US power of 60 W, which can be readily obtained via US irrigation during routine dental treatments. Accordingly, single-phase BFO nanosheets provide a practical and highly efficient approach for eradicating E. faecalis biofilms in dentin canals.
研究领域:
材料科学
·
牙科医学
·
抗菌治疗
·
纳米催化
·
压电催化
✓ 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）