JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 32
·1-11
·
IF 2.8
Yang Shiju,Qian Libing,Zhang Bo,Wang Tingting,Li Yunfei
The method of preparation is a critical factor affecting the structure and properties of Bi 2 O 3 material. In this work, Bi 2 O 3 was synthesized through calcination (denoted as Bi 2 O 3 –C) and hydrothermal methods (denoted as Bi 2 O 3 –H), utilizing bismuth-based metal–organic framework (Bi–MOF) as the precursor. As an electrode material for supercapacitors, Bi 2 O 3 –H demonstrated outstanding rate performance (515 F g −1 at 50 A g −1 ) and remarkable cycle stability (74% retention after 4000 cycles). Subsequently, the Bi 2 O 3 -H underwent further processing through electron beam irradiation (EBI), resulting in a sample designated as Bi 2 O 3 –I. Following EBI treatment, the crystalline characteristics of Bi 2 O 3 –I and the concentration of oxygen vacancies (OVs) exhibited a significant improvement, thereby augmenting the material's conductivity. Because the positively charged OVs can quickly attract OH − from the electrolyte to the electrode surface, thereby accelerating the REDOX reaction, the current control mechanism of Bi 2 O 3 –I is partially derived from a surface-controlled pseudo-capacitance process. The irradiated Bi 2 O 3 -I electrode demonstrated superior capacitance (990 F −1 at 2 A g −1 ), enhanced rate performance (585 F −1 at 50 A g −1 ), and remarkable cycling stability (83% retention after 4000 cycles).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Tingting Qin,Xiaoyu Zhang,Dong Wang,Ting Deng,Haoxiang Wang,Xiaofei Liu,Xiaoyuan Shi,Zhengming Li,Hong Chen,Xiangmin Meng,Wei Zhang,Weitao Zheng
Metal oxides as electrode materials are of great potential for rechargeable aqueous batteries. However, they suffer from inferior cycle stability and rate capability because of poor electronic and ionic conductivities. Herein, taking vertically orientated Bi2O3 nanoflakes on Ti substrates as examples, we find that the δ-Bi2O3 electrode with plenty of positively charged oxygen defects show remarkably higher specific capacity (264 mA h g–1) and far superior rate capability than that of α-Bi2O3 with less oxygen vacancies. Through pinpointing the existence form and the role of oxygen vacancies within the electrochemical processes, we demonstrate that oxygen vacancies in δ-Bi2O3 can not only promote electrical conductivity but also serve as central entrepots collecting OH– groups via electrostatic force effect, which has boosted the oxidation reaction and enhanced the electrochemical properties. Our work merits an excellent Bi2O3 negative electrode material via giving full play to the role of oxygen vacancies in electrochemical energy storage.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
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
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Micro & Nano Letters
·
2018
·Vol. 13
·期 10
·1443-1446
·
IF 0.841
Jin Li,Ben Ze Wu,Zhen Xiang Zhou
γ-Bi 2 O 3 powders were prepared from [Bi(NO 3 ) 3 ·5H 2 O] and NaOH through low-temperature liquid phase method at <90°C. This process featured low cost, simplicity and a normal pressure. Bismuth oxides were synthesised in large quantities in water systems. Morphology, structure and optical properties were characterised by X-ray diffraction, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and ultraviolet visible absorption spectrophotometry (UV–Vis). The SEM indicated that tetrahedral Bi 2 O 3 with the edge length of 1–5 μm was formed. The FTIR spectra show a chemical bond of Bi–O existed. Bi 2 O 3 presents the photo absorption properties from UV light region to visible light and the band gap of the Bi 2 O 3 is 3.0 eV.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Weiwei Zhu,Dekui Shen
Bismuth oxide (Bi 2 O 3 ) is considered a promising electrode material for supercapacitors boasting a high theoretical capacity. Its weak conductivity, limited rate performance, and poor cycling stability have significantly hindered practical applications. In this work, a simple precipitation and calcination method was used to prepare Bi 2 O 3 /hierarchical porous carbon composite materials (Bi 2 O 3 /N-HPC). The biomass-derived hierarchical porous carbon precursor was prepared through a process involving nitrogen doping and chemical activation. Comprehensive physical and chemical structure characterization results showed that a large number of spherical Bi 2 O 3 particles were dispersed on the surface of the carbon material, providing numerous active sites for electrochemical reactions. The nitrogen-doped hierarchical porous carbon scaffold provided rapid pathways for charge transfer and restricted the aggregation of Bi 2 O 3 particles. As an electrode material in a 6 M KOH electrolyte, Bi 2 O 3 /N-HPC exhibited a specific capacitance of 684.9 F g −1 at a current density of 0.5 A g −1 , and even at an increased current density of 20 A g −1 , the specific capacitance remained at 500.0 F g −1 . After 10,000 cycles of charge and discharge, the capacitance retention rate of the Bi 2 O 3 /N-HPC electrode reached 85.2 %. This research offers a promising pathway for the development of high-performance supercapacitor electrode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2022
·Vol. 12
·期 4
·526
·
IF 3.236
Jiaqi Li,Junjun Wang,Fengmin Wu,Hui Ma,Tianyi Ma,Yu Tian,Danqing Liu,Bin Yang
In this paper, Bi2O3-doped (K0.5Na0.5)NbO3(x = 0.1, 0.2, 0.3, 0.4) lead-free ceramics are prepared by a conventional solid-state reaction and analyzed by studying the structure, ferroelectric, and piezoelectric properties. It is found that the doping of Bi2O3increases the proportion of the trigonal phase in KNN ceramics, thus enabling the construction of KNN ceramics with an orthogonal–trigonal phase boundary at room temperature. At the same time, doping with Bi2O3can reduce the grain size and improve grain size uniformity of the ceramics. The KNN-0.1%Bi2O3ceramic has the best piezoelectric properties in all composition; the results are as follows:d33= 121pC/N,kp= 0.474,kt= 0.306.Keywords:KNN lead-free ceramics;Bi2O3doping;grain effects;piezoelectric property
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
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
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS ES&T Water
·
2022
·
IF 0
Guangyao Zhai,Shaozhi Liu,Shenghe Si,Yuanyuan Liu,Honggang Zhang,Yuyin Mao,Minghui Zhang,Zeyan Wang,Hefeng Cheng,Peng Wang,Zhaoke Zheng,Ying Dai,Baibiao Huang
Phenolic molecules are a kind of toxic organic pollutants commonly discharged from industrial effluents. Catalytic ozonation holds great potential in removing phenolic pollutants and further improving the removal efficiency is still the research focus of this field. In this study, defect engineering was used to construct Bi2O3 with rich oxygen vacancies (denoted as Ov-Bi2O3). Ov-Bi2O3 was found to exhibit efficient activity toward the removal of phenolic derivatives. Combined DFT calculations and experimental results suggest that oxygen vacancies play two important roles: (1) the exposed Bi sites induced by rich oxygen vacancies endow a special bridging O3 adsorption, which is beneficial to improve the kinetics of O3 decomposition; (2) O2 produced during the O3 decomposition process can be reutilized to generate 1O2, which prolongs the utilization efficiency of O3. In addition, Ov-Bi2O3 was loaded onto carbon fiber, which also demonstrates efficient activity. This work provides an alternative way to design efficient catalysts toward removal of phenolic pollutants via ozone oxidation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2018
·
IF 2.631
Qingnan Zhang,Aijie Yan,Zixiang Cui,Yongqiang Xue
As an electrode material, the many excellent properties of nano-Bi 2 O 3 have been researched. However, the influences of particle size on the electrode reaction thermodynamic properties of nano-Bi 2 O 3 electrode are not clear. In this paper, the effect of particle size on electrochemical thermodynamic functions of nano-Bi 2 O 3 electrode was analyzed theoretically. In experiment, the spherical nano-Bi 2 O 3 with different particle sizes and the corresponding nano-Bi 2 O 3 electrodes were prepared, then the temperature coefficients of nano-Bi 2 O 3 electrodes and the thermodynamic functions of the electrode reaction were obtained by measuring the electrode potentials of nano-Bi 2 O 3 electrodes with different particle sizes at different temperatures. The experimental results show that the particle size has significant influence on the thermodynamic properties of nano-Bi 2 O 3 electrode, the standard electrode potentials and the equilibrium constants increase with the particle size decreases, while the temperature coefficient, the mole Gibbs energy change, the mole enthalpy change and the mole entropy change reduce. In addition, these physical quantities are all linearly related with the reciprocal of average particle size when the radius exceeds 10 nm. The experimental regularities are consistent with the theoretical analysis.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Nailing Gao,Ziyang Lu,Xiaoxu Zhao,Zhi Zhu,Youshan Wang,Dandan Wang,Zhoufa Hua,Chunxiang Li,Pengwei Huo,Minshan Song
In order to realize the rational utilization of waste, C/Fe 3 O 4 was obtained by using biomass as the carbon source and prepared via one-step method, afterwards, a double conductive C/Fe 3 O 4 /Bi 2 O 3 composite photocatalyst was further synthesized via solvothermal method. Due to the good double conductivity, the electrons in Bi 2 O 3 could be transported to C/Fe 3 O 4 , which greatly inhibited the recombination of electron-hole pairs, it is worth noting that the double conductivity effectively blocked the reverse transfer of electrons to Bi 2 O 3 . Consequently, the photodegradation rate of C/Fe 3 O 4 /Bi 2 O 3 composite photocatalyst reached 91%, which was much higher than that of pure Bi 2 O 3 . In addition, the mechanism exploration experiment showed that h + was the main activity specie, meanwhile, the photocatalytic electron transfer mechanism was also investigated.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2020
·
IF 4.302
Renjun Li,Yanan Zhou,Xueqian Wang,Langlang Wang,Ping Ning,Lei Tao,Jun Cai
La 2 O 3 /Bi 2 O 3 photocatalysts were prepared by impregnation of Bi 2 O 3 with an aqueous solution of lanthanum precursor followed by calcination at different temperatures. The composite materials were used for the first time for the photocatalytic removal of Hg 0 from a simulated flue gas under UV light irradiation. The results showed that the sample containing 6 wt.% La 2 O 3 and calcined at 500°C has the highest dispersion of the active sites, which was promoted by the strong interaction with the support (i.e., the formation of Bi-O-La species). Since they are fully accessible on the surface, the material also exhibits excellent optical properties while the heterojunction formed in La 2 O 3 /Bi 2 O 3 promotes the separation and migration of photoelectron-hole pairs and thus Hg 0 oxidation efficiency is enhanced. The effects of the various factors (e.g., the reaction temperature and composition of the simulated flue gas (i.e., O 2 , NO, H 2 O, and SO 2 )) on the efficiency of the Hg 0 photocatalytic oxidation were investigated. The results demonstrated that O 2 and SO 2 enhanced the efficiency of the reaction while the reaction temperature, NO, and H 2 O had an inhibitory effect.
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
International Journal of Materials Research
·
2023
·Vol. 114
·期 3
·207-218
·
IF 0.8
Xiaoyu Wang,Zizhan Sun,Chunhu Yu,Zhengyu Cai,Chuangang Fan,Lizhai Pei
Bi 2 O 3 /Dy 2 O 3 nanoflakes with triclinic Bi 2 O 3 and cubic Dy 2 O 3 phases were synthesized by a hexadecyl trimethyl ammonium bromide (CTAB)-assisted hydrothermal route. The Bi 2 O 3 /Dy 2 O 3 nanoflakes were analyzed by X-ray diffraction, X-ray photoelectron spectroscopy, electron microscopy and electrochemical impedance spectroscopy. The size of the Bi 2 O 3 /Dy 2 O 3 nanoflakes with curled surface is about 2 μm and thickness is about 25 nm. X-ray photoelectron spectroscopy confirms the chemical composition of the Bi 2 O 3 /Dy 2 O 3 nanoflakes. The formation process of the Bi 2 O 3 /Dy 2 O 3 nanoflakes was investigated by controlling the CTAB concentration, reaction temperature and reaction time. The formation of the Bi 2 O 3 /Dy 2 O 3 nanoflakes depends on CTAB. The results of cyclic voltammetry (CV) and electrochemical impedance spectroscopy demonstrate good electro-catalytic activity of the Bi 2 O 3 /Dy 2 O 3 nanoflakes towards L-cysteine with a pair of quasi-reversible CV peaks at +0.01 V and –0.68 V, respectively. Bi 2 O 3 /Dy 2 O 3 nanoflakes modified electrode detects L-cysteine linearly over a concentration ranging from 0.001 to 2 mM with a detection limit of 0.32 μM. The proposed nanocomposites modified electrode possesses good reproducibility and stability which can be used as a promising candidate for L-cysteine detection.
研究领域:
材料科学
·
电化学
·
生物传感器
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）