JOURNAL OF POWER SOURCES
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2018
·
IF 6.945
Tao Dai,Yue Zhao,Xiao-Hui Ning,R. Lakshmi Narayan,Ju Li,Zhi-wei Shan
Li-Bi based liquid metal batteries (LMBs) have attracted interest due to their potential for solving grid scale energy storage problems. In this study, the feasibility of replacing the bismuth cathode with a bismuth-antimony alloy cathode in lithium based LMBs is investigated. The influence of the Bi:Sb ratio on voltage characteristics is evaluated via the constant current discharge method and electrochemical titration. On observing the cross section of the electrode at various stages of discharge, it is determined that both Sb and Bi form solid intermetallics with Li on the cathode. Additionally, the addition of Bi not only reduces the melting temperature of the Bi:Sb intermetallic but also actively contributes to the electrode capacity. Thereafter, a Li|LiCl-LiF|Sb-Bi liquid metal battery with 3 A h nameplate capacity, assembled and cycled at 1 C rate, is found to possess a stable capacity for over 160 cycles. The overall performance of this battery is discussed in the context of cost effectiveness, energy and coulombic efficiencies.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chunxin Xu,Yi Wang,Wanjun Li,Dunfeng Gao,Guoxiong Wang,Rui Cai
Renewable energy-driven electrocatalytic CO2 reduction reaction (CO2RR) over bismuth-based catalysts shows great promise for converting CO2 into formic acid and formate while closing the carbon cycle. Herein, we report a high-performance BiFeO3/Bi25FeO40 precatalyst, which delivers a formate partial current density of 359.8 mA cm–2 and a formate formation rate of 6.71 mmol h–1 cm–2 in a flow cell at −0.75 V versus reversible hydrogen electrode (vs RHE). Furthermore, it shows stable formate production for 88 h at −0.64 V vs RHE with a total current density of 160 mA cm–2. The impressive electrocatalytic performance toward CO2RR to formate is likely ascribed to the synergistic effect of single Bi atoms and bimetallic BiFe nanoparticles present in close proximity after in situ electrochemical reconstruction of the BiFeO3/Bi25FeO40 precatalyst. This work presents new insights into the development of highly efficient Bi-based catalysts for the CO2RR.
研究领域:
化学
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材料科学
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电化学
·
可再生能源
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催化
✓ 已验证
DOI
PubMed
高影响因子
eScience
·
2023
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IF 0
Rong Liu,Lai Yu,Xiaoyue He,Huanhuan Liu,Xinyi Ma,Zongzhi Tao,Guanglin Wan,Nazir Ahmad,Bo Peng,Liang Shi,Genqiang Zhang
Bismuth sulfide (Bi 2 S 3 ) is a dominant anode material for sodium-ion batteries due to its high theoretical capacity. However, extreme volume fluctuations as well as low electrical conductivity and reaction kinetics still limit its practical applications. Herein, we construct an abundant heterointerface of Bi/Bi 2 S 3 by engineering the structure of Bi nanoparticles embedded on Bi 2 S 3 nanorods (denoted as Bi–Bi 2 S 3 NRs) to effectively solve the abovementioned obstacles. Theoretical and systematic characterization results reveal that the constructed heterointerface of Bi/Bi 2 S 3 has a built-in electric field, significantly boosts the electrical conductivity, enhances the Na + diffusion kinetics, and buffers the volume variation. With this modification, it can deliver long cycling life, with an ultra-high capacity of 500 mAh g −1 over 500 cycles at 1 A g −1 , and outstanding rate capability, with a capacity of 456 mAh g −1 even at 15 A g −1 . Moreover, a full cell can achieve a high energy density of 180 Wh kg −1 at a power density of 40 W kg −1 . Our research opens up a fresh path for improving the dynamics and structural stability of metal sulfide-based electrode materials for SIBs.
研究领域:
材料科学
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电化学
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DOI
OPTICAL MATERIALS
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2024
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IF 3.8
Junzhao Wang,Limin Wang,Chengzhi Chu
In this paper, bismuth-rich three-dimensional Bi 4 O 5 I 2 /BiOBr hollow flower spheres were prepared by a one-pot solvothermal method. The anionic contaminant Rhodamine B (RhB) was used as the photocatalytic test contaminant. The results showed that the degradation rate of RhB was more than 99 %. Then Br element was introduced into Bi 4 O 5 I 2 hollow flower balls, the diameter of flower balls decreased and flowers sparsely. With the increase of Br content, flower balls gradually increased in volume and became denser. Small and sparse flower balls increase the specific surface area of flower balls and increase the number of active sites, thus improving the REDOX capacity of photogenerated electrons and holes. Our findings suggest that both holes (h + ) and superoxide radical anions (•O 2 − ) are crucial players during photocatalysis. The aim of this study is to develop an efficient photocatalyst for the degradation of organic pollutants, and its photocatalytic mechanism is described theoretically.
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
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 19
·12176-12190
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IF 10.733
Chao-Jie Ma,Ya Chen,Cheng Zhu,Qi Chen,Wei-Li Song,Shuqiang Jiao,Haosen Chen,Daining Fang
Perovskite materials (ABX3) are significant for energy storage and conversion, and most of the electrochemical processes are currently known to link with the reaction from the active B site. Here, a novel electrochemical active reaction is observed from the A site in perovskite bismuth ferrite (BiFeO3) nanoparticles. With bismuth ion extraction from the A site, single-phase BiFeO3 is found to convert into two phases, namely, Bi2O3 and residual Bi-deficient BiFeO3, and these irreversible products undergo additional separate electrochemical processes in the subsequent cycles. The fundamental understanding suggests that the extracted Bi3+ ions play a dominant role in the electrochemical process via redox reactions of Bi3+ ⇌ Bi2+ ⇌ Bi0. Interestingly, such an electrochemical reaction involving the A site could also be suppressed via heteroatom doping at the A site (yttrium ions), which effectively supports the mechanism of ion extraction. The perspectives for the novel mechanism in electrochemical energy storage are further discussed.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Wenhan Chen,Meng Dai,Li Xiang,Shan Zhao,Shuguang Wang,Zuoli He
The S-scheme heterojunction has garnered increasing attention due to its remarkable oxidation capacity and efficient separation of photogenerated carriers. In this study, a one-pot glycerol-assisted hydrothermal process was utilized to successfully synthesize S-scheme heterojunction photocatalysts comprising basic bismuth nitrate (BBN) and bismuth tungstate (BWO). Interestingly, the BBN/BWO heterogeneous photocatalysts exhibited the highest photocatalytic properties. The optimized product achieved the degradation of sulfamethazine (SMZ) within 1 h, with a kinetic constant ( k ) value of 0.05818 min −1 . The degradation process was influenced significantly by ·O 2 − and h + species. To determine the degradation pathway of SMZ in the presence of BBN/BWO-0.6, liquid chromatography–mass spectrometry (LC–MS) analysis was performed, which revealed a decrease in the toxicity of intermediates and products. The enhanced photocatalytic activity can be attributed to the internal electric field (IEF) of the S-scheme heterojunction between BBN and BWO, effectively promoting the separation of photogenerated carriers. This research presents a viable approach for developing S-scheme heterojunctions in SMZ photodegradation and other environmental applications.
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
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 20
·6045-6057
·
IF 7
Fuyan Kang,Xiaona Jiang,Yao Wang,Juanna Ren,Ben Bin Xu,Guoyang Gao,Zhanhua Huang,Zhanhu Guo
Photocatalytic treatment of antibiotics in aqueous ecosystems has become a promising method. However, the low efficiency photogenerated charge separation and slow kinetics of the catalyst severely limit its deployment for industrial applications. Here, the three-dimensional bismuth tungstate (Bi2WO6)/bismuth oxyiodide (BiOI) loaded on biochar (BC/BWI) composite catalyst was designed for the efficient removal of tetracycline (adsorption capacity: 227.09 mg g−1, removal rate: 99.8%). Via construction of Z-scheme heterojunctions at the interface of Bi2WO6 and BiOI, the built-in electric field promotes the directional separation of photogenerated carriers to achieve efficient separation and utilization of photogenerated charges. Meanwhile, the introduction of electron-rich biochar (BC) effectively enhances the adsorption performance, photogenerated electron migration capacity and mass transfer process of the material. The introduction of BC and the building of Z-scheme heterojunctions effectively achieve the spatially synergistic separation of photogenerated charges. The ˙O2− dominates the photocatalytic process, according to the mechanistic studies. The degradation intermediate product testing revealed that tetracycline is efficiently degraded through two main pathways. This work provides ideas for the design of catalysts for the efficient removal of antibiotics from water bodies.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
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IF 5.774
Junjun Chang,Yuping Li,Feng Duan,Chunlei Su,Yujiao Li,Hongbin Cao
Common methods in capacitive deionization (CDI) for selective removal are derived from membrane separation mechanism or size-based intercalation mechanism. In this study, based on the electrochemical activity of bismuth (Bi) material to chloride ions (Cl − ) and inertness to sulfate ions (SO 4 2− ), Bi electrode is used as anode in CDI to selectively remove Cl − ions from mixed NaCl and Na 2 SO 4 solution. Through the reaction with Bi, Cl − ions are stored in bismuth oxychloride (BiOCl). Results show that Bi electrode exhibits selectivity for Cl − over SO 4 2− with a selectivity coefficient of more than 1.5 in solutions with mole ratio of Cl − to SO 4 2− larger than 1. The selectivity coefficient is greatly dependent on the mole ratio of Cl − to SO 4 2− and increases when the ratio rises. In solution with a fixed Cl − /SO 4 2− mole ratio, higher applied voltage and prolonged time result in higher Cl − ion removal capacity, but not necessarily better selectivity. The highest selectivity coefficient of 4.5 is achieved in 8.5 mM NaCl and 1.1 mM Na 2 SO 4 mixed solution at voltage of 1.6 and 2.0 V after charging for 1 h. These results demonstrate that Bi electrode can selectively remove Cl − ions from mixed solution with a relatively lower concentration of SO 4 2− ions, which provides new insights into ion separation and selective removal by CDI.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhiwen Hu,Huiying Zhang,Yulong Yang,Qifu Bao,Weixia Dong
Photocatalysis exhibits superior catalytic performance, but its application in wastewater treatment faces challenges of water quality impact, limited removal efficiency, and instability. Piezo-catalysis, as a green and low-carbon catalytic technology, has great potential for wastewater treatment. In this study, we prepared a dandelion-like Bi 4 Ti 3 O 12 /BaTiO 3 catalyst via a template-free and one-step solvothermal method. The hierarchical microstructure assembled from nanosheets and nanoparticles was formed due to the shear effect of potassium hydroxide (KOH) and directional adsorption during the reaction process, and it has a high specific surface area and outstanding piezo-photocatalytic performance compared to individual Bi 4 Ti 3 O 12 or BaTiO 3 catalysts. The piezo-photocatalytic degradation efficiency of dyes by Bi 4 Ti 3 O 12 /BaTiO 3 reaches 99.5 %, and demonstrates excellent stability and wide applicability. This result was ascribed to the synergistic effect of heterojunction band structure and piezoelectric properties. Furthermore, the removal mechanism analysis indicates that the holes (h + ) and superoxide radical (O 2 − ) play a major role in the piezo-photocatalytic degradation of dyes. This work presents a novel method for developing efficient piezo-photocatalytic composite catalysts with a broad prospect for wastewater treatment.
研究领域:
材料科学
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环境工程
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纳米催化
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物理化学
·
能源与环境材料
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jia Zheng,Jincheng Liu,Xuyang Feng,Jiarong Liu,Shuang Zong,Lingling Liu,Yanxiong Fang
The difficulty of achieving both high conversion rate and high selectivity is a huge challenge in the catalytic aerobic oxidation of cyclohexane . In this paper, bismuth tungstate-bismuth oxychloride (Bi 2 WO 6 -BiOCl) nanoflower heterojunctions prepared via a one-step solvothermal process were applied in the photo-thermo synergetic catalytic oxidation of cyclohexane in the dried air. With the addition of little water at different reaction temperature, the ratio of bismuth to tungsten and the mass ratio of Bi 2 WO 6 to BiOCl can be precisely tailored in the nanoflower sphere composites with thin nanosheets . Their microscopic morphology, elemental composition , crystal structure, and photoelectrochemical characteristics were explored by different characterization methods. The Bi 2 WO 6 -BiOCl composites possessed poor photocatalytic and thermal performances with the low conversion rates of 1.43% and 2.68%, respectively. However, through the photo-thermo catalytic oxidation process, an exceptional conversion rate of 13.32% was achieved with excellent selectivity of 99.22% for cyclohexanone and cyclohexanol (KA oil) using the same Bi 2 WO 6 -BiOCl composites. This superior performance outstrips Bi 2 WO 6 flowers, BiOCl nanosheets and Bi 2 WO 6 -BiOCl composites with other compounding ratios. The creation of a high-low heterojunction in the Bi 2 WO 6 -BiOCl composite was confirmed by band energy analysis. The opto-electronic analysis, band energy analysis, sacrifice experiments, and active radical analysis were employed to elucidate the mechanism for the exceptional photo-thermo catalytic performance in detail. This work offers an exploratory solution to the challenges of high energy consumption and the difficulty in simultaneously achieving high selectivity and high conversion rates in cyclohexane oxidation, thus holding significant value.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Yong Wang,Shikai Xue,Yuhao Liao,Haiyan Wang,Qiujun Lu,Ningli Tang,Fuyou Du
In this study, Ag/Bi 2 O 3 /Bi 5 O 7 I with s-scheme heterostructures were successfully synthesized in situ by nano-silver modification of CUA-17 and halogenated hydrolysis.The growth rate of Bi 2 O 3 crystals was effectively controlled by adjusting the doping amount of Ag, resulting in the formation of a facet-coupling heterojunctions . Through the investigation of the microstructure and compositional of catalysts, it has been confirmed that an intimate facet coupling between the Bi 2 O 3 (120) facet and the Bi 5 O 7 I (312) facet, which provides robust support for charge transfer. Under visible light irradiation, the AgBOI.3 heterojunction photocatalyst exhibited an outstanding degradation rate of 98.2% for Bisphenol A (BPA) with excellent stability. Further characterization using optical, electrochemical, impedance spectroscopy, and electron spin resonance techniques revealed significantly enhanced efficiency in photogenerated charge separation and transfer, and confirming the s-scheme structure of the photocatalyst. Density functional theory calculations was employed to elucidate the mechanism of BPA degradation and the degradation pathway of BPA was investigated by LC-MS. Finally, the toxicity of the degradation intermediates was evaluated using T.E.S.T software.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2020
·
IF 4.333
Min Li,Ying Li
The conversion of solid Bi 2 O 3 to bismuth in a urea–1-methylimidazolium trifluoromethylsulfonate (urea–MIMTfO) electrolyte is studied for the first time. The electrochemical reduction behavior of solid Bi 2 O 3 was studied using a home-made graphite cavity working electrode. Cyclic voltammetry of the graphite cavity electrode confirms that solid Bi 2 O 3 is converted to metallic bismuth via a one-step process. Electrolysis experiments were carried out under constant voltages of 2.4 V, 2.6 V, and 2.8 V for various periods of time. Experimental results indicate that the urea–MIMTfO solution is a useful electrolyte for the electrochemical conversion of solid Bi 2 O 3 to metallic bismuth. This approach offers a green and straightforward method for the conversion of oxides to metals.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）