Journal of the Australian Ceramic Society
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2018
·Vol. 55
·期 1
·71-76
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IF 0.587
Du Xiaoni,Liu Yang,Wang Xiaohong,Feng Jingqing,Ren Chaofei
α-Bi 2 O 3 and β-Bi 2 O 3 nanoparticles were selectively synthesized via one-step solution combustion synthesis (SCS) using bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O) as the oxidant and tartaric acid (C 4 H 6 O 6 ) as the fuel, and α/β-Bi 2 O 3 heterojunction was rapidly prepared by treating SCS β-Bi 2 O 3 powders with NaOH solution. The physical and chemical properties of as-prepared samples were characterized by XRD, SEM, TEM, PL, and UV-vis techniques. The formation of α/β-Bi 2 O 3 heterojunction can be proven by TEM, UV-vis diffuse reflectance spectra, and PL spectra results. The band gap energies of α-Bi 2 O 3 , β-Bi 2 O 3 , and α/β-Bi 2 O 3 measured by UV-vis diffuse reflectance spectra were estimated to be about 2.9, 2.48, and 2.7 eV, respectively. The PL spectra of α/β-Bi 2 O 3 heterojunction showed higher efficiency of charge separation and transfer across the α–β phase junction than those of α-Bi 2 O 3 and β-Bi 2 O 3 , leading to the enhancement of photocatalytic activity. The synthesized α/β-Bi 2 O 3 heterojunction can degrade 86% of rhodamin B (RhB) after 180 min under visible-light irradiation, better than those of pure α-Bi 2 O 3 (24%, 180 min) and pure β-Bi 2 O 3 (60%, 180 min). Consequently, α/β-Bi 2 O 3 heterojunction is a promising photocatalyst, which can be easily prepared by SCS and post-treatment of NaOH solution.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Peng Wang,Su-Zhen Wang,Ya-Ru Kang,Zhong-Sen Sun,Xue-Dong Wang,Yu Meng,Ming-Hui Hong,Wan-Feng Xie
Gas sensors based on metal oxide semiconductors have attracted great interest in the sensing of organic volatile compounds gas due to their easy fabrication, effective cost, and good stability. Herein, we rationally design ethanol gas sensors based on p -Bi2O3 and n -ZnO heterostructure with clear interfaces, which exhibit excellent response of 21.6 towards 100 ppm ethanol, wide concentration detection range from 1 to 500 ppm, working temperature as low as 175 °C, short response time of 7 s, and recovery time of 8 s at 100 ppm of ethanol. Moreover, the selectivity of Bi2O3/ZnO sensor towards ethanol is much better than that of other organic volatile gases. The relationship between the origin of superior sensing performances towards ethanol and the sharp interfaces of p -Bi2O3/ n -ZnO heterostructure are also systematically investigated. On the other hand, it is also demnostrated that the tetragonal phase β -Bi 2 O 3 has positive effect on the sensing performance of Bi 2 O 3 /ZnO composite.
研究领域:
材料科学
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化学
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DOI
高影响因子
Crystals
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2023
·Vol. 13
·期 2
·264
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IF 2.7
Zhenying Chen,Xiuqing Cao,Yuyang Huang,Shuang Zhang,Wenjian Pan,Wen Deng
Ti-doped ZnO (TZO) and Bi2O3thin films were designed and deposited by magnetron sputtering successively on ITO glass substrate to form a Ti-doped ZnO/Bi2O3(TZO/Bi2O3) heterojunction. Microstructure and photoelectric properties of TZO, Bi2O3, and TZO/Bi2O3films were tested and characterized. The results showed that TZO film with a hexagonal wurtzite structure was preferentially grown along the crystal plane (002), had a good crystallization state, and was an N-type semiconductor film with high transmittance (90%) and low resistivity (4.68 × 10−3Ω·cm). However, the Bi2O3film sputtered in an oxygen-containing atmosphere and was a polycrystalline film that was preferentially grown along the crystal plane (111). It had a lower crystallization quality than TZO film and was a P-type semiconductor film with low transmittance (68%) and high resistance (1.71 × 102Ω·cm). The I–V curve of TZO/Bi2O3composite films showed that it had an obvious heterojunction rectification effect, which indicates that the PN heterojunction successfully formed in TZO/Bi2O3films.Keywords:TZO film;Bi2O3film;TZO/Bi2O3heterojunction;magnetron sputtering;optoelectronic properties
研究领域:
材料科学
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半导体物理
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Wei Chen,Yiran Liang,Zhili Chen,Yunxiang Zhang,Jian Wang,Xin Chen,Chenliang Zhou,Keshun Nie,Zhongjie Wang,Qinfang Zhang
Designing of an efficient heterojunction for the practical application of photocatalysis has been considered as the promising topic for the settle of the energy crisis and environmental pollution. Herein, a dual Bi 2 O 3 /BiOCl/Bi 24 O 31 Cl 10 ternary heterojunction has been constructed by the in-situ photoreduction technique for the photocatalytic degradation of rhodamine B (RhB) and tetracycline hydrochloride (TCH). The significant difference in the work function ( W f ) among Bi 2 O 3 , BiOCl, and Bi 24 O 31 Cl 10 leads to the formation of the space charge region (built-in electric field) around the heterojunction interface along with band bending, which facilitates the directional migration and spatial separation of photogenerated carriers and offers the strong redox capacity of photogenerated electrons and holes. This process is beneficial for the generation of active species of superoxide free radical ( ∙ O 2 − ) and the photo-generated hole (h + ). The optimized removal efficiencies of RhB and TCH for the ternary heterojunction were nearly 7.19 and 1.28 times higher than these for the pure Bi 24 O 31 Cl 10 , respectively. Furthermore, the involved vital reactive radicals, potential degradation pathway, and the eco-toxicity of intermediates over Bi 2 O 3 /BiOCl/Bi 24 O 31 Cl 10 are evaluated through the trapping experiment, LC-MS calculation, and toxicity analysis. This work demonstrates a new heterojunction photocatalyst for the elucidation of pollutant degradation mechanism.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ENVIRONMENTAL RESEARCH
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2019
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IF 5.026
Tao Wang,Xiqing Liu,Donglai Han,Changchang Ma,Maobin Wei,Pengwei Huo,Yongsheng Yan
This work focused on the utilization of biological extract for the preparation of lignin-based carbon composites materials and used in the field of photocatalysis . A straightforward one-step carbonization way has been developed to prepare vanadium-doped lignin-based carbon/Bi 2 O 3 composites photocatalyst by using sodium lignosulfonate as the carbon source and catalyst. The application of lignin as the carbon source to form photocatalyst support tends to control the uniform distribution. At the same time, sodium lignosulfonate as the catalyst could break down the BiVO 4 during carbonization process. A series of characterizations demonstrated the BiVO 4 was transformed into Bi 2 O 3 and vanadium-doped lignin-based carbon. The possible synthesis process was proposed. Moreover, the novel V-doped carbon/Bi 2 O 3 composites photocatalyst displayed higher photocatalytic activity than bare BiVO 4 . A possible photocatalytic mechanism was also discussed. This work provided new insight into the lignin-based carbon materials.
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
PubMed
高影响因子
COMBUSTION AND FLAME
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2025
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IF 6.2
Xin-xing Zeng,Si-jia Yu,Jun Wang,Jian Wang,Yu-qin Gan,Xian-feng Wei,Jie Chen,Xing-quan Zhang
Boron (B), a frequently utilized metalloid fuel, has been garnering growing attention due to its elevated calorific value. However, the inert oxide layer (B 2 O 3 ) on the surface of B powder obstructs the transfer of oxygen, resulting low combustion efficiency and long ignition delay time. In this study, a range of binary oxidizers BiF 3 -Bi 2 O 3 is developed to enhance the ignition and combustion performance of B by leveraging the synergistic effect of the shell-breaking effect of BiF 3 and the rapid reaction kinetics of Bi 2 O 3 . A comprehensive investigation is conducted on the influence of the BiF 3 /Bi 2 O 3 ratio on thermal reaction, ignition delay time, burning rate, and pressure output. The TG-DSC data indicate that the B-BiF 3 reaction exhibits superior gas production capability, while the B-Bi 2 O 3 reaction offers greater advantages in terms of heat release. Furthermore, the combination of binary oxidizers (10 wt.%-20 wt.% BiF 3 ) is more efficient in promoting the ignition and combustion of B than a single metal oxidizer. The B-BiF 3 -Bi 2 O 3 composite materials exhibit a remarkably high burning rate of 14.81 m/s and a rapid pressurization rate of 1622.45 kPa/s. The enhanced ignition and combustion performance of B-BiF 3 -Bi 2 O 3 composite materials arises from the synergistic effect between the reactions of B-BiF 3 and B-Bi 2 O 3 . This study illustrates that the combination of BiF 3 and Bi 2 O 3 , two types of oxidizers, is an effective method to improve the combustion efficiency of boron.
研究领域:
材料科学
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燃烧与推进
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
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2023
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IF 6.4
Zhifang Feng,Bona Zhang,Peijun Ji,Ruiyuan Hu,Bin Gao,Xiaofeng Wang,Yu-Lan Meng,Xue-Zhi Song,Zhenquan Tan
Bi2O3 is increasingly used in supercapacitors because of its high theoretical specific capacitance, but poor inherent conductivity and poor ion diffusion limit its actual capacitance. Therefore, the rational design of the surface and structure of Bi2O3 is the key to improve the specific capacitance of Bi2O3. Here, we report the fabrication of high-performance negative electrodes from Bi2O2CO3 nanosheets wrapped around Bi2O3 arrays (Cu foam@Bi2O3@Bi2O2CO3) by a combination of electrical substitution, oxidative calcination, and hydrothermal methods. The realized Cu foam@Bi2O3@Bi2O2CO3 presents a surface cross-linked laminar structure, which shortens the electrolyte penetration path. The direct replacement growth of Bi on copper substrates to obtain subsequent composites allows for enhanced adhesion between the electrode material and the collector, facilitates charge transfer to the electrode material, and achieves ultrahigh loadings (13.2 mg cm–2). In addition, the constructed asymmetric supercapacitor has a maximum energy density of 1.6 mW h cm–2 (45.5 W h kg–1) at a power density of 6.2 mW cm–2 (175.9 W kg–1). This work provides a simple design strategy to enhance the electrochemical performance of Bi2O3.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
Catalysts
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2023
·Vol. 13
·期 5
·821
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IF 3.9
Xiaowang Lu,Wenxuan Chen,Haijun Hou,Junchao Qian,Qinfang Zhang
A two-dimensional layered CeO2/Bi2O3composite was synthesized by microwave solvothermal method. X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscope (FESEM), transmission electron microscope (TEM), UV-Vis diffuse reflection spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS) were used to studied crystal structure, morphology, optical performance, elemental composition and the surface electronic state of the samples. The photocatalytic properties of the prepared samples were evaluated by photocatalytic desulfurization under visible light. When the molar ratio of Ce and Bi was 1:2, CeO2/Bi2O3composite presented the highest photocatalytic desulfurization rate. Transient Photocurrent measurement, electrochemical impedance spectroscopy (EIS) and photoluminescence spectroscopy (PL) showed that CeO2and Bi2O3formed a heterojunction, which could promote the separation of photogenerated electrons and holes, improving the photocatalytic activity. Furthermore, it was found that the active species of hydroxyl radical (·OH) played an important role in the photocatalytic degradation of dibenzothiophene (DBT) based on the active species capture experiment. Finally, a plausible mechanism for the photocatalytic oxidative desulfurization of this nanocomposite was proposed.Keywords:CeO2;Bi2O3;composite;heterojunction;photocatalytic desulfurization
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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2024
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IF 5.3
Xia Cheng,Xinyan Xiao,Fei Wang,Ting Lu,Yu Zhang
Photocatalysis is extensively implemented in organic pollutant degradation, and the critical point is to develop outstanding and stable photocatalysts. Herein, the synthesis of coral reef-like α-Bi2O3/BiOBr heterostructure photocatalysts involves the in situ growth of BiOBr nanosheets onto α-Bi2O3, with the latter derived through calcination utilizing a bismuth-based metal–organic framework (CAU-17) as the precursor. Under simulated sunlight, the 20% α-Bi2O3/BiOBr heterojunction degraded nearly 97.7% of RhB in 60 min, while pure α-Bi2O3 and BiOBr nanosheets degraded only 7.8 and 65.3%, respectively. Furthermore, the 20% α-Bi2O3/BiOBr nanocomposite exhibited superior recycling stability, degrading 86.6% RhB after four cyclic experiments. This is attributed to the fact that the nanoscale α-Bi2O3 material obtained by calcination can retain the exoteric diffusion channels of CAU-17, making α-Bi2O3/BiOBr heterojunctions have an enormous specific surface area, providing more adsorption sites and promoting their photocatalytic capacity. Free radical capture tests and electron paramagnetic resonance measurements indicated that h+ and •O2– were the primary active substances during photodegradation. On the basis of that, a feasible photodegradation mechanism of type II α-Bi2O3/BiOBr heterojunctions was proposed. This study opens up the possibility of designing type II heterojunctions with MOFs as precursors for dye degradation.
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
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Xiangyue Liu,Bing Li,Bin Duan,Shiying Guo,Shengli Zhang,Nan Meng,Zhaoyang Lou,Tong Liu,Junshan Hu,Hong Ge
Bi 2 O 3 phosphors co-doped with Yb 3+ and Er 3+ ions were successfully synthesized using a high-temperature solid-state method. Under 980 nm near-infrared laser excitation, Bi 2 O 3 : Yb 3+ /Er 3+ phosphors emit strong red light at 658 nm and weak green light at 551 nm. The optimal doping concentrations of Yb 3+ and Er 3+ are 0.10 and 0.02, respectively. This composition results in a red-to-green intensity ratio of 157.6. The red emission is primarily driven by energy transfer, promoting Er 3+ from the 4 I 13/2 level to the 4 F 9/2 level [Yb 3+ ( 2 F 5/2 ) + Er 3+ ( 4 I 13/2 ) → Yb 3+ ( 2 F 7/2 ) + Er 3+ ( 4 F 9/2 )]. The cross-relaxation process lowers the photon population in the 4 F 7/2 level and raises the photon population in the 4 F 9/2 level, leading to the occurrence of a single-band red emission. This phosphor also demonstrates promising potential for optical temperature sensing. It exhibits a maximum relative sensitivity of 3.02 % K −1 at 298 K.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 12
·1635
·
IF 4.501
Mingjun Wang,Che Li,Bingfang Liu,Wenzhen Qin,Yu Xie
Heterojunction photocatalytic materials show excellent performance in degrading toxic pollutants. This study investigates the influence of calcination temperature on the performances of floral Bi2O3/TiO2composite photocatalyst crystal, which was prepared with glycerol, bismuth nitrate, and titanium tetrachloride as the major raw materials via the solvothermal method. XRD, SEM/TEM, BET, Uv-vis, and XPS were employed to analyze the crystal structure, morphology, specific surface area, band gap, and surface chemical structure of the calcined temperature catalysts. The calcination temperature influence on the catalytic performance of composite photocatalysis was tested with rhodamine B (RhB) as the degradation object. The results revealed the high catalytic activity and higher photocatalytic performance of the Bi2O3/TiO2catalyst. The degradation efficiency of the Bi2O3/TiO2catalyst to RhB was 97%, 100%, and 91% at 400 °C, 450 °C, and 500 °C calcination temperatures, respectively, in which the peak degradation activity appeared at 450 °C. The characterization results show that the appropriate calcination temperature promoted the crystallization of the Bi2O3/TiO2catalyst, increased its specific surface area and the active sites of catalytic reaction, and improved the separation efficiency of electrons and holes.Keywords:calcination temperature;Bi2O3/TiO2compound;visible light;photodegradation
研究领域:
材料科学
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环境化学
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光催化
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
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IF 5.9
Long Liu,Wei Liu,Xiaoliang Zhao,Daimei Chen,Rongsheng Cai,Weiyou Yang,Sridhar Komarneni,Dongjiang Yang
Radioactive iodine isotopes that are produced in nuclear power plants and used in medical research institutes could be a serious threat to the health of many people if accidentally released to the environment because the thyroid gland can absorb and concentrate them from a liquid. For this reason, uptake of iodide anions was investigated on microrosette-like δ-Bi2O3 (MR-δ-Bi2O3). The MR-δ-Bi2O3 adsorbent showed a very high uptake capacity of 1.44 mmol g–1 by forming insoluble Bi4I2O5 phase. The MR-δ-Bi2O3 also displayed fast uptake kinetics and could be easily separated from a liquid after use because of its novel morphology. In addition, the adsorbent showed excellent selectivity for I– anions in the presence of large concentrations of competitive anions such as Cl– and CO32–, and could work in a wide pH range of 4–11. This study led to a new and highly efficient Bi-based adsorbent for iodide capture from solutions.
研究领域:
环境科学
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材料科学
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核医学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）