JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 7
·1-14
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IF 2.8
Guo Yan,Zhang Xinxu,Zhang Rui,Li Aiyuan,Zhang Jiawen,He Hui
In this work, Bi 2 O 3 and Bi 2 S 3 nanomaterials are modified with polyvinylpyrrolidone (PVP). The products are defined as Bi 2 O 3 @PVP and Bi 2 S 3 @PVP, respectively. SEM demonstrates that the addition of PVP helps to reduce the size of Bi 2 O 3 and Bi 2 S 3 nanomaterials. XRD exhibits that the structure of Bi 2 O 3 changed from α-Bi 2 O 3 to β-Bi 2 O 3 @PVP due to the addition of PVP, while the Bi 2 S 3 configuration remained unchanged. XPS demonstrates that excess PVP leads to a partial reduction of trivalent Bi 3+ to metallic Bi 0 . Their supercapacitive performances are tested and it is found that appropriate PVP can improve the capacitive performance and cyclic stability of both Bi 2 O 3 and Bi 2 S 3 . The specific capacitance of Bi 2 O 3 @1 g PVP is 1.4 times that of the pristine Bi 2 O 3 , and the specific capacitance of Bi 2 S 3 @1 g PVP is 1.8 times that of the pristine Bi 2 S 3 . Compared with 82.0% Bi 2 O 3 and 79.6% Bi 2 S 3 , the cyclic retention is 94.7% and 95.2% for Bi 2 O 3 @1 g PVP and Bi 2 S 3 @1 g PVP after 10,000 cycles. The reason for enhancement is that PVP can support Bi 2 O 3 and Bi 2 S 3 materials, not only to support their structural stability but also to reduce their size and facilitate electron transfer and ion diffusion.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 3
·2100-2110
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IF 2.22
Fan Lele,Liu Zhonghu,Zhu Yiyu,Wang Zhiqiang,Zhao Sihan,Zhu Lei,Zhang Qinfang
In this work, Li x BiO y compounds were synthesized via a facile calcination method. It was surprising that the as-prepared Li 7 BiO 6 compounds transformed into Li-doping tetragonal Bi 2 O 3 phase after undergoing water washing disposal, which was well verified by combining XRD and HR-TEM. In addition, the energy bandgap of prepared compound was derived based on UV–Vis diffuse reflectance spectrum and results indicate the formation of a lower band gap when increasing Li dopant concentration. Moreover, the Li-doping tetragonal Bi 2 O 3 exhibited high visible light-driven photocatalytic activity and the methylene blue can be well degraded in 10 min. The enhanced photocatalytic activity was ascribed to the improvement of light response and charge transfer. Our current work will boost the development of photocatalysis and bring insight into other Li x MO 6 (e.g., Li 6 WO 6 , Li 7 TabO 6 , Li 7 NbO 6 , Li 8 ZrO 6 ) compounds to extend their photocatalytic application.
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
CHEMICAL PHYSICS LETTERS
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2025
·
IF 3.1
Peng Lu,Yuqi Peng,Xiaoxue Wang,Shiying Chen,Jing Shang,Shuyu Qi,Yue Yang,Xueli Hu,Zilong Zhao
To enhance the photocatalytic degradation performance of Bi 2 O 3 against tetracycline (TC) pollutants, a Biochar/Bi 2 O 3 (BC/Bi 2 O 3 ) composite photocatalyst was synthesized using chitin as a carbon source through a one-step calcination method. The tetracycline degradation efficiency of the photocatalytic material (m BC: Bi2O3 = 2:1) synthesized at 500 °C for 4 h was reached 83.43 %, as well as 5.5 and 1.5 times higher than that of the BC and Bi 2 O 3 monomers, respectively, while the degradation rate constant of BC/Bi 2 O 3 (2:1) was 0.0052 min −1 , which was 13 and 1.7 times higher than that of BC (0.0004 min −1 ) and Bi 2 O 3 (0.0030 min −1 ). Extensive property analysis shows that BC and Bi 2 O 3 interact through Bi-O-C bonds after synthesize, which improves the electron transport efficiency and provides more active sites for the composite. The interaction between these two materials allows the composite to provide more active sites while improving the electron transfer efficiency. UV–vis spectroscopy and free radical quenching experiments further corroborated the direct degradation ability of the BC/Bi 2 O 3 composite photocatalyst towards TC. As the reaction progressed, TC undergoes degradation mineralization via two distinct pathways, faciliatetd by the action of h + and •O 2 − radicals. Overall, the functional BC/Bi 2 O 3 with high photocatalytic activity provides worthwhile insights of photocatalytic materials application in the wasterwater treatment field.
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
MOLECULES
·
2023
·Vol. 28
·期 2
·882
·
IF 4.6
Mingjun Wang,Che Li,Bingfang Liu,Wenzhen Qin,Yu Xie
Photocatalysis is a hopeful technology to solve various environmental problems, but it is still a technical task to produce large-scale photocatalysts in a simple and sustainable way. Here, nano-flower β-Bi2O3/TiO2composites were prepared via a facile solvothermal method, and the photocatalytic performances of β-Bi2O3/TiO2composites with different Bi/Ti molar ratios were studied. The nano-flower Bi2O3/TiO2composites were studied by SEM, XRD, XPS, BET, and PL. The PL result proved that the construction of staggered heterojunction enhanced the separation efficiency of carriers. The degradation RhB was applied to study the photocatalytic performances of prepared materials. The results showed that the degradation efficiency of RhB increased from 61.2% to 99.6% when the molar ratio of Bi/Ti was 2.1%. It is a mesoporous approach to enhance photocatalytic properties by forming heterojunction in Bi2O3/TiO2composites, which increases the separation efficiency of the generated carriers and improves photocatalytic properties. The photoactivity of the Bi2O3/TiO2has no evident changes after the fifth recovery, indicating that the Bi2O3/TiO2composite has distinguished stability.Keywords:Bi2O3/TiO2;heterojunction;photocatalysts;degradation RhB
研究领域:
环境科学
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材料科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 11
·10651-10659
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IF 2.195
Huang Xuechen,Liu Bang,Wang Shuanghu,Liu Yuxi,Wu Gang
Bi 2 O 3 - and MgO-doped BaTiO 3 –(Na 1/4 Bi 3/4 )(Mg 1/4 Ti 3/4 )O 3 (BT–NBMT) ceramics were synthesized from a solid-state approach, and then the impacts of Bi 2 O 3 and MgO dosages on the structures and dielectric characteristics were studied. Obvious dual peaks were observed with Bi 2 O 3 dosage to 0.04 and MgO dosage to 0.02. The low-temperature dielectric stability and grain size of the Bi 2 O 3 dopant were improved, while those of the MgO dopant hardly changed with MgO dosage to 0.02, indicating the core/shell microstructure of BT–NBMT was formed following the dissolving-precipitating mechanism of BT systems doped with low-melting-point substances. The low-temperature dielectric stability of the Bi 2 O 3 - or MgO-doped BT–NBMT ceramics first improved and then deteriorated with the increase of doping concentrations. High-temperature stability and diffuse-state transition were found in the optimal ceramics. The second phases of Bi 2 O 3 and MgO, magnesium titanium compounds were observed in Bi 2 O 3 and MgO dopants, respectively. Bi 2 O 3 -doped and MgO-doped ceramics exhibited a fine-grained microstructure and significant grain growth, respectively, and the core/shell microstructure was responsible for the dielectric temperature stability for Bi 2 O 3 dopants and collapsed to a homogeneous one with remarkable grain growth and the second phases for MgO dopants.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
International Journal of Nanomedicine
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2025
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IF 6.5
Zhiyu Zheng,Gareth R Williams,Honghua Guo,Yilu Zheng,Mengting Xiu,Yanyan Zhang,Huan Zhang,Kai Wang,Jindong Xia,Yu Wang,Li-Min Zhu
Purpose Owing to the limitations of single-mode cancer treatments, combination therapies have attracted much attention. However, constructing a platform for combination therapies in a simple and effective way and improving the overall treatment effect remains a challenge. Our aim was to combine sonodynamic therapy, radiotherapy and chemotherapy together and improve therapeutic outcomes within one nanoplatform.Methods In this work, we sought to exploit the properties of nanoscale heterojunctions to this end. A multifunctional Bi2O3-TiO2@polydopamine-doxorubicin (BTPD) nanoparticle platform was constructed as an anti-cancer theranostic. Under ultrasound irradiation, the Bi2O3-TiO2 core can generate singlet oxygen to damage tumor cells. Meanwhile, the high-Z Bi2O3 can attenuate the energy of X-rays and scatter secondary electrons to enhance radiation damage in the tumor. A thin coating of polydopamine (PDA) increases the biocompatibility but also gives the particles the ability for photoacoustic imaging. Doxorubicin, a DNA repair inhibitor which can hinder tumor recovery from radiation damage, was loaded onto the PDA.Results A comprehensive series of in vitro and in vivo assays demonstrated that the nanoparticles were effectively taken up into cancer cells, where they could induce ROS production and cause cell death. In vivo, this led to a marked reduction in tumor volume in a murine 4T1 cancer model.Conclusion The formulations developed here have significant potential for future investigation and exploration in the treatment of cancer.
研究领域:
肿瘤学
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材料科学
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生物医学工程
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DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2012
·Vol. 18
·期 51
·16491-16497
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IF 5.925
Fan Qin,Guangfang Li,Runming Wang,Jiliang Wu,Hongzhe Sun,Rong Chen
Graphical Uniform Bi 2 O 3 and (BiO) 2 CO 3 nanotubes were synthesized by a solvothermal method without involving any surfactants or templates. The synergistic effect of ethylene glycol and urea played a critical role in the formation of the tubular structure. The Bi 2 O 3 and (BiO) 2 CO 3 nanostructures not only exhibited excellent Cr VI -removal capacity, but also displayed high photocatalytic efficiency for the degradation of Rhodaine B under visible-light irradiation (see figure). Uniform bismuth oxide (Bi 2 O 3 ) and bismuth subcarbonate ((BiO) 2 CO 3 ) nanotubes were successfully synthesized by a facile solvothermal method without the need for any surfactants or templates. The synergistic effect of ethylene glycol (EG) and urea played a critical role in the formation of the tubular nanostructures. These Bi 2 O 3 and (BiO) 2 CO 3 nanotubes exhibited excellent Cr VI -removal capacity. Bi 2 O 3 nanotubes, with a maximum Cr VI -removal capacity of 79 mg g −1 , possessed high removal ability in a wide range of pH values (3–11). Moreover, Bi 2 O 3 and (BiO) 2 CO 3 nanotubes also displayed highly efficient photocatalytic activity for the degradation of RhB under visible-light irradiation. This work not only demonstrates a new and facile route for the fabrication of Bi 2 O 3 and (BiO) 2 CO 3 nanotubes, but also provides new promising adsorbents for the removal of heavy-metal ions and potential photocatalysts for environmental remediation.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Sheng-Zhe Zhao,Yi Yang,Ran Lu,Yan Wang,Hong-Lan Huang,Yong-Da Hu,Raul D. Rodriguez,Jin-Ju Chen
The removal of organic contaminants from water poses a significant challenge that can be tackled by integrating adsorption and photocatalytic degradation functions in a single architecture. However, traditional powdery nanomaterials face challenges in separation and lack synergistic function, hampering their practical application. This study presents a one-step hydrothermal synthesis of a convenient recyclable Bi 2 O 2.33 /Bi 2 O 3 @ECNF (electrospun carbon nanofibers), which combines both adsorption and photocatalytic performance. The Bi 2 O 2.33 /Bi 2 O 3 exhibits high adsorption removal of methyl orange (MO), reaching 94.56 % and a maximum capacity of 213.13 mg g −1 . Additionally, the Bi 2 O 2.33 /Bi 2 O 3 shows a high charge transfer rate, strong redox ability, and efficient removal of Rhodamine B (RhB) at 83.01 %. Loading the Bi 2 O 2.33 /Bi 2 O 3 on lightweight carbon fibers allows for easy recycling. The Bi 2 O 2.33 /Bi 2 O 3 @ECNF demonstrates excellent stability and reusability, with a removal rate of 87.37 % for tetracycline hydrochloride (TCH) at high concentrations. This work presents a promising solution for the practical application of photocatalysts by overcoming the limitations of single photocatalysts and minimizing secondary pollution from single adsorbents.
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
Journal of Energy Storage
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2022
·
IF 8.907
Zongliang Yu,Shunxiang Wang,Yangming Huang,Yongjin Zou,Fen Xu,Cuili Xiang,Jian Zhang,Jingjing Xie,Lixian Sun
Supercapacitors are a promising option for next-generation clean energy storage devices, although their capacitance must still be improved through an appropriate choice of electrode material. Herein, NiCo 2 O 4 nanoneedles coated with Bi 2 O 3 nanosheets are successfully prepared using a two-step hydrothermal process to produce electrodes that may be used for supercapacitors. The proposed electrodes are analyzed using both a range of experimental measurement techniques and density functional theory simulations. The NiCo 2 O 4 nanoneedles provide an ideal skeleton for improving specific surface area and present electrical active sites for the Faraday reaction, while Bi 2 O 3 nanosheets have a great potential for use in supercapacitor applications. The proposed NiCo 2 O 4 @Bi 2 O 3 electrode shows a high capacity of 766 F g −1 at 1 A g −1 . In addition, an asymmetric supercapacitor based on a NiCo 2 O 4 @Bi 2 O 3 positive electrode and activated carbon was produced, which provided a working voltage of 1.6 V, achieved a high energy density of 24 Wh kg −1 at 800 W kg −1 , and demonstrated excellent cycling stability (capacitance retention of 82 % after 10,000 cycles at 10 A g −1 ). These results demonstrate that the proposed NiCo 2 O 4 @Bi 2 O 3 heterostructure exhibits potential for application in high-performance supercapacitors.
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
·
IF 5.1
Xianghao Meng,Sibo Kang,Zhihua Zhao,Guixin Jin,Zhigang Shao,Lan Wu
Bi 2 O 3 microspheres modified with CeO 2 were successfully synthesized via the hydrothermal method, and a gas sensor based on this composite material was prepared. Various analytical techniques were employed to examine the morphological and structural characteristics of the Bi 2 O 3 /CeO 2 composites. The synthesized Bi 2 O 3 microspheres exhibited a uniform size, with a particle diameter of approximately 2.5 μm. CeO 2 nanoparticles could be clearly observed on the surface of the Bi 2 O 3 microspheres. The results of X-ray photoelectron spectroscopy revealed that the adsorbed oxygen and oxygen vacancies on Bi 2 O 3 doped with CeO 2 increased, potentially due to the presence of Ce 3+ /Ce 4+ ions. The Bi 2 O 3 /CeO 2 sensors demonstrated significantly enhanced sensing properties for formaldehyde at room temperature. At a formaldehyde concentration of 100 ppm, the reactivity of the Bi 2 O 3 /CeO 2 sensor was 137 %, exhibiting a 6.6-fold enhancement compared to the Bi 2 O 3 sensor. Furthermore, the adsorption energy, differential charge density, and state density of the sample were calculated using density functional theory (DFT). Subsequently, the gas-sensing mechanism was analyzed and discussed. The results indicate that CeO 2 -modified Bi 2 O 3 nanospheres can enhance the adsorption energy of formaldehyde. The formation of a heterojunction facilitates electron transfer, thereby improving the gas-sensing properties. Furthermore, the gas sensing mechanism was discussed and analyzed using density functional theory (DFT) calculations.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF PHOTOENERGY
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2024
·Vol. 2024
·期 1
·3777201
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IF 2.1
Lina Bing,Wei Wu,Zhenjiang Shen
Bi 2 O 3 -BaTiO 3 heterojunction with high photocatalysis efficiency was directly synthesized by rapid thermal processing (RTP). Bi 2 O 3 and BaTiO 3 were mixed in ratio and treated by RTP and conventional thermal processing (CTP), respectively. RTP samples have obvious Bi 2 O 3 diffraction peaks, while CTP samples show pure BaTiO 3 tetragonal perovskite. More small particles and layered existed in RTP samples. Photodegradation of MB solutions shows that RTP can promote photocatalytic efficiency. Its main lies in the following points: RTP can remove grain boundary defects by strengthening the bond grains; RTP can limit the solution region of the two substances to a certain range to get the best built-in electric field width; and RTP can strengthen the tetragonal BaTiO 3 phase to hasten ion movement. Therefore, RTP can achieve much higher photocatalytic efficiency by improving the build heterojunction. This work provides a direct and efficient route to get improvement and high performance of heterojunction.
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
CERAMICS INTERNATIONAL
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2022
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IF 5.532
Xinran Ji,Chang Shen,Ye Zhao,Hui Zheng,Qiong Wu,Qiangyuan Zhang,Liang Zheng,Peng Zheng,Yang Zhang
NiCuZn ferrite is a material suitable for low-temperature co-fired ceramic (LTCC) technology due to its high permeability and relatively low sintering temperature . The main research questions regarding NiCuZn ferrites are focused on reducing the sintering temperature of the NiCuZn ferrites to achieve compatibility with the Ag electrodes and improve their electromagnetic properties. In this study, the electromagnetic properties of NiCuZn (Ni 0.29 Cu 0.14 Zn 0.60 Fe 1.94 O 3.94 ) ferrites were enhanced by doping with Bi 2 O 3 , resulting in a reduction of the sintering temperature to 925 °C. The findings show that a suitable concentration of Bi 2 O 3 doping could promote the growth of grains and result in NiCuZn ferrites with denser microstructures sintered at a low temperature. Furthermore, adding 0.30 wt% Bi 2 O 3 to NiCuZn ferrite enhances its electromagnetic properties, such as a high real part of permeability (∼937.6 @ 1 MHz), high saturation magnetization (∼60.353 emu/g), low coercivity (∼0.265 kA/m), and excellent dielectric constant (∼14.71 @ 1 MHz). In addition, the chemically compatible Ag electrodes suggest that the NiCuZn +0.30 wt% Bi 2 O 3 ceramics may be acceptable for LTCC technology.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）