CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Fei Liang,Jiaxiang Liu
High density and low electrical resistivity ITO targets were prepared by normal pressure sintering in oxygen with Bi 2 O 3 –Nb 2 O 5 addition. The relative density, microstructure and electrical properties of the ITO targets can be adjusted by changing the sintering temperature (1350 °C~1550 °C) and the content of Bi 2 O 3 –Nb 2 O 5 . The results show that the sintering temperature of ITO targets with Bi 2 O 3 –Nb 2 O 5 decreased from 1550 °C to 1450 °C, and the maximum relative density (99.6%) and the lowest electrical resistivity (1.78×10 −4 Ω cm) were reached when the sintering temperature was 1450 °C with 5 wt% Bi 2 O 3 –Nb 2 O 5 . The carrier concentration increased as the increase of the contents of Bi 2 O 3 –Nb 2 O 5 and sintering temperature. The mobility first increased, and then decreased above 1450 °C as the sintering temperature increased.
研究领域:
材料科学
·
物理学
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产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Yinghua Li,Wenyue Yin,Ning Yang,Yuxin Li,Chaoqun Zhu,Lu Liu,Haibo Li,Xi Chen
A kind of easily recyclable and composite photocatalyst based on Ag/AgCl/Bi 2 O 3 /BiFeO 3 (AABB) and modified zeolite (MZ)/activated carbon (AC) were made, and investigated for the degradation of levofloxacin hydrochloride (Lev-HCl) in wastewater. The structures and morphologies of AABB@loading materials were firstly characterized. The results showed that under visible light , the optimal conditions for photodegradation were: mass ratio of MZ to AABB 3:2, AABB@MZ dosage 1–1.2 g/L, initial concentration of Lev-HCl <18 mg/L. Under these conditions, 72.09%∼ Lev-HCl could be degraded within 1.5 h. In addition, AABB@MZ could be easily recovered by gravity settling for 30 min and reused three times with 74.7% recovery rate. Photoluminescence (PL) combined with electron paramagnetic resonance (EPR) showed that photocatalysts mainly produced ·O 2 − and ·OH, which played a major role in the degradation process. Finally, a possible catalytic mechanism for AABB@MZ was suggested.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Keyu Chen,Yu He,Bixuan Zhu,Chuanyezi Cai,Jiacheng Guo,Ruiqi He,Xi Chen,Lu Ye,Jianjun Zhang,Sude Ma
As the communications industry continues to develop, low temperature co-fired ceramics are used as resonators in multilayer chip components of integrated circuits. In order to co-fire with the metal, it is necessary to reduce the sintering temperature of ceramics to below 960 °C. In order to rule out the impact of changes in the operating temperature of the ceramic material, we need to adjust the resonant frequency temperature coefficient to near zero. This paper discusses the application of a temperature-stable low-temperature sintered dielectric material derived from Li 2 ZnSiO 4 (LZS) in low-temperature co-fired ceramics (LTCC). The addition of the low melting point oxide Bi 2 O 3 resulted in a significant reduction of the sintering temperature and improvement of the densification of LZS ceramics, where the sintering temperature was reduced from 1200 °C to 900 °C. The relative density and microwave dielectric properties (dielectric constant ε r , quality factor Q × f and temperature coefficient of resonant frequency τ ƒ ) of LZS- x Bi 2 O 3 ( x = 0, 3, 6, 9, 12 mol%) ceramics sintered at different temperatures increase and then decrease with increasing Bi 2 O 3 content. The best performance was obtained when the Bi 2 O 3 addition was 9 mol% (ε r = 6.87, Q × f = 28,151 GHz, τ ƒ = - 85.2 ppm/°C). By increasing the amount of TiO 2 added to LZS-9 mol%Bi 2 O 3 , the τ ƒ value of the ceramic system can be continuously increased, which is effectively adjusted to near zero. The best integrated dielectric properties of the LZS-Bi 2 O 3 -TiO 2 ceramic system (ε r = 8.9, Q × f = 22.982 GHz, τ ƒ = - 8.34 ppm/°C) are obtained when the TiO 2 addition is 30 wt%. This suggests that LZS-Bi 2 O 3 -TiO 2 ceramics have potential for low-temperature co-fired ceramics (LTCC) applications.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yibing Xie,Huihui Wu,Jianfei Luo,Shao Zhang,Langlang Wang,Xueqian Wang,Yixing Ma,Ping Ning
The incorporation of vanadium during the synthesis process induced a spontaneous and complete thermal phase transition from α-Bi 2 O 3 to β-Bi 2 O 3 . This phase transition facilitated the development of intrinsic electric field at the interface between V 2 O 5 and β-Bi 2 O 3 , consequently establishing a novel carrier transfer pathway. As a result, the fabricated V 2 O 5 /β-Bi 2 O 3 heterojunction exhibited an outstanding removal efficiency of over 98 % for gaseous mercury (Hg 0 ) under UV light, and this efficiency of 95.0 % even after 35 h of testing. Introducing vanadium enhanced the light absorption capacity in the ultraviolet region and effectively separated photoinduced charge carriers. As revealed by density functional theory calculations, the photoinduced electron–hole transfer in the V 2 O 5 /β-Bi 2 O 3 heterojunction followed the Z-scheme mechanism. This mechanism significantly contributed to the long-term stability of photocatalytic Hg 0 removal, even when H 2 O and NO were present. This study presents a novel material composited by a thermal phase transition technique, aimed at the highly effective and green removal of Hg 0 in the environment.
研究领域:
环境科学
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材料科学
·
化学
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产品关联
DOI
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 2
·025001
·
IF 1.62
Zeyang Luo,Huan Wang,Yuxin Ma,Guodong Zhang,Duanting Yan,Xinyu Bai,Dejun Wang,Runru Liu
In this study, a promising electrolyte material Bi0.76Lu0.16Ti0.08O1.5+δ (abbreviated as '8T16LSB') with high oxygen ion conductivity was obtained by co-doping with Lu2O3 and TiO2 into Bi2O3. The phase composition, microstructure, and conductivity of TLSB ceramics were respectively investigated by x-ray diffraction, scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). XRD results exhibited that the sintered TLSB ceramics with an unchanged total doping concentration of 24 mol.% existed as a cubic fluorite structure. SEM results showed that the TLSB pellets were relatively dense. The relationship between temperature and conductivity showed that the 8T16LSB ceramic exhibited the highest conductivity of 0.56 S cm−1 at 700 °C, which was higher than the value of 0.37 S cm−1 for the representative single-doping Er0.4Bi1.6O3 (abbreviated as '20ESB'). The results certified that the electrochemical performance of Bi2O3 was promoted by the co-dopant of Lu3+and Ti4+.
研究领域:
材料科学
·
无机化学
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Lingzhi Huang,Yusai Zhou,Guobao Yuan,Junli Liu,Chengbao Jiang,Shengxue Yang
Hydrogen production from electrolyzed water, when coupled with green power generation technology, can achieve carbon-free hydrogen production. Designing and synthesizing non-noble metal-based electrocatalysts is crucial for advancing hydrogen production from electrolytic water. Non-noble metal oxide, one-dimensional Bi 2 O 3 nanowires, owing to their unique nanowire morphology, offer the benefits of a large specific surface area and high conductivity. These properties make them potential candidates for oxygen evolution reaction (OER) applications. In this work, we sequentially designed and synthesized a series of multi-metal doped Bi 2 O 3 nanowire samples using a straightforward solvothermal method. Electrocatalytic measurements revealed that the OER performance of these multi-metal doped Bi 2 O 3 nanowires were significantly surpassed that of undoped Bi 2 O 3 samples. Specifically, the CoFeNiMn-Bi 2 O 3 -PMA nanowires achieve a current density of 10 mA cm −2 with an overpotential of merely 285 mV in a 1 M KOH solution, and a Tafel slope of 66 mV dec −1 . Through comprehensive characterization and electrocatalytic assessments, we determined that the enhanced OER activity of the CoFeNiMn-Bi 2 O 3 -PMA nanowires can be attributed to the synergistic effects of Co, Fe, Ni, and Mn elements. Notably, intense electronic interactions among these metal elements led to an elevated concentration of high-oxidation-state cations, such as Co 3+ and Fe 3+ , along with increased oxygen vacancies. These features collectively augmented the number of reactive sites on the sample surface. Furthermore, stability tests indicated that the CoFeNiMn-Bi 2 O 3 -PMA nanowires exhibited robust stability, with only a marginal overpotential increase observed during 8 h of chronopotentiometry measurement at a current density of 50 mA cm −2 . This work confirms the efficacy of a simple modification process involving multi-metal doping, designed to enhance the performance of one-dimensional nanowire electrocatalysts, which provide a valuable reference for future research aimed at developing non-noble metal-based electrocatalysts.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 23
·21693-21701
·
IF 2.22
Zhou Fuming,Wang Hao,Guo Jianming,Yang Hui,Li LingFeng,Zhang Qilong
Microwave dielectric ceramics Sr 2 CeO 4 + n wt% Li 2 CO 3 —Bi 2 O 3 (LB) (1 ≤ n ≤ 4, L: B = x : y , weight ratio) were prepared by a traditional solid-state reaction method. The effects of LB additives on the phase formation, microstructure, sintering behavior, and microwave dielectric properties of Sr 2 CeO 4 ceramics were investigated. The sintering temperature can be reduced obviously from 1270 to 950 °C because of the liquid phase formation of LB. Single-phase Sr 2 CeO 4 ceramics with dense structure and homogenous grains were obtained by adding 1wt% LB. With LB content increasing, Q × f values would decrease because secondary-phase SrCeO 3 appeared in the ceramics. When the content of LB was fixed at 1 wt%, the sintering temperature and Q × f value would decrease simultaneously with the ratio of Li 2 CO 3 increasing. Desirable performances of Sr 2 CeO 4 + 1wt% LB ceramics: ( ε r = 14.36, Q × f = 102,023 GHz and τ f = − 66.42 ppm/°C, L:B = 2:8) and ( ε r = 13.56, Q × f = 70,109 GHz, τ f = − 64.17 ppm/°C, L:B = 8:2) can be achieved at 1075 °C and 950 °C, respectively, suggesting that Sr 2 CeO 4 –LB ceramics have a great potential for millimeter-wave applications.
研究领域:
材料科学
·
陶瓷
·
微波工程
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DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Xinhe Liu,Yong Kang,Yi Wang
In this work, novel visible-light responsive β-Bi 2 O 3 /Ag 2 WO 4 p-n heterojunction photocatalysts were prepared by a simple in situ deposition method and characterized using XRD, FT-IR, SEM, TEM, XPS, UV–vis and PL. The uniform deposition of Ag 2 WO 4 particles on β-Bi 2 O 3 flakes to form heterojunctions, exhibited excellent photocatalytic activity for the degradation of methylene blue (MB) under visible light in 30 min. Compared with pure β-Bi 2 O 3 and Ag 2 WO 4 samples, the kinetic reaction rate constant of MB degradation by β-Bi 2 O 3 /Ag 2 WO 4 was 48.47 times higher than that of β-Bi 2 O 3 , and the degradation rate was as high as 98.8% with good cycling stability.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Huarui Han,Songbai Zhang,Shushan Song,Weijie Zhang,Dandan Liu,Ziheng Song,Qianyu Wang,Changchang Ma,Sheng Feng,Xuemei Duan
In this study, a new type of 2D/2D Bi 2 O 3−x /NiAl-LDH (BO/NA-LDH) S-scheme photocatalyst was prepared by combining NiAl-LDH with Bi 2 O 3−x by wet chemical deposition for obtaining efficient photothermal-assisted photocatalytic reduction of CO 2 under simulated sunlight irradiation. In particular, the as-prepared optimal 50-BO/NA-LDH sample exhibited the CO production yield of 83.55 ± 2.76 μmol/g/h, which was 9 and 27 times that of BO (9.32 ± 0.62 μmol/g/h) and NA-LDH (3.09 ± 0.38 μmol/g/h), respectively. The enhancement of photothermal-assisted activity over the 50-BO/NA-LDH system was mainly attributed to the coupling of the photothermal conversion performance of Bi 2 O 3−x and improving the migration efficiency of interface carriers of S-scheme heterojunction and 2D/2D structure. This study presents a promising strategy for the development of high-efficient photothermal-assisted photocatalysts.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Jun Feng,Tao Jiang,Yingchun Han,Otieno Kevin Okoth,Ling Cheng,Jingdong Zhang
A dual Z-scheme Bi 2 S 3 /Bi 2 O 3 /WO 3 ternary film was constructed via a controllable reduction of peroxotungstate by ethanol, calcination of Bi (NO 3 ) 3 and in situ anion exchange of Bi 2 O 3 with sulfide. The as-prepared composite film was characterized by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The UV–visible diffuse reflectance spectroscopic and photoluminescence studies indicated that the introduction of Bi 2 S 3 in Bi 2 O 3 /WO 3 film effectively improved the absorption of the film in the visible region and suppressed the recombination of photogenerated carriers. The photoelectrocatalytic activity of the Bi 2 S 3 /Bi 2 O 3 /WO 3 film was evaluated by decoloration of Rhodamine B under visible light illumination. Compared with WO 3 and Bi 2 O 3 /WO 3 films, the Bi 2 S 3 /Bi 2 O 3 /WO 3 film exhibited much higher degradation efficiency. Moreover, the enhanced visible light photoelectrocatalytic activity of the Bi 2 S 3 /Bi 2 O 3 /WO 3 film was also demonstrated by efficient degradation of diclofenac. According to the reactive oxygen species detected by electron spin resonance, a dual Z-scheme system formed in the Bi 2 S 3 /Bi 2 O 3 /WO 3 film was proposed, which offered a new approach to the construction of semiconducting composite film with high photoelectrocatalytic performance for pollutant removal.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 10
·4769-4777
·
IF 2.961
Chang Xueyi,Qiu Yongfu,Cheng Zhiyu,Wang Xiaoting,Zhong Qingpeng,Huang Huizhen
To improve the specific capacitance of supercapacitor with bismuth oxide, this paper reports hollow nanosheet-assembled α-Bi 2 O 3 spheres prepared by solvothermal method as novel electrode materials. The electrochemical results show that the hollow nanosheet-assembled α-Bi 2 O 3 spheres exhibited a high electrochemical performance with a maximum specific capacitance of 1380.2 F g −1 at a current density of 1 A g −1 , which is the highest specific capacitance achieved to date with bismuth oxide as electrode material, and remarkable rate capability of 84.1% when the current density increased to as high as 15 A g −1 . The reasons for the high capacitance performance of the product are due to the monoclinic α-Bi 2 O 3 with a stable phase and more ion channels to transport and store ions, as well as the hollow spherical structure with porosity, which makes the material fully utilized. In a word, Bi 2 O 3 should be as a promising candidate towards high-performance electrode for pseudocapacitive supercapacitor.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Wei Fang,Naiqing Zhang,Lishuang Fan,Kening Sun
Polypyrrole-coated Bi 2 O 3 @CMK-3 nanocomposite is prepared by nanocasting technique and chemical polymerization method. Bi 2 O 3 nanoparticles are dispersed into CMK-3 matrix, and polypyrrole is coated onto the surface of Bi 2 O 3 @CMK-3. Polypyrrole-coated Bi 2 O 3 @CMK-3 nanocomposite as an anode material for lithium-ion batteries has an outstanding power capability (321 mAh g −1 at a current rate of 6 A g −1 ) and a significantly improved cycling ability (380 mAh g −1 after 1000 cycles at a current rate of 5 A g −1 ). The greatly enhanced electrochemical performance of polypyrrole-coated Bi 2 O 3 @CMK-3 nanocomposite is associated with the synergistic effect of highly conductive CMK-3, polypyrrole layer and Bi 2 O 3 nanoparticles. Such a configuration inhibits the aggregation of Bi 2 O 3 nanoparticles and preserves the structure integrity of electrode material, in addition to highly improving the electrical conductivity and maintaining the stable structure of solid electrolyte interface film.
研究领域:
材料科学
·
能源存储
✓ 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）