Nanomaterials
·
2023
·Vol. 13
·期 5
·915
·
IF 5.3
Jing-Jing Yang,Ying-Zhuo Shen,Zheng Wang,Bo Zhou,Xiao-Ya Hu,Qin Xu
In this study, β-Bi2O3nanosheets functionalized with bisphenol A (BPA) synthetic receptors were developed by a simple molecular imprinting technology and applied as the photoelectric active material for the construction of a BPA photoelectrochemical (PEC) sensor. BPA was anchored on the surface of β-Bi2O3nanosheets via the self-polymerization of dopamine monomer in the presence of a BPA template. After the elution of BPA, the BPA molecular imprinted polymer (BPA synthetic receptors)-functionalized β-Bi2O3nanosheets (MIP/β-Bi2O3) were obtained. Scanning electron microscopy (SEM) of MIP/β-Bi2O3revealed that the surface of β-Bi2O3nanosheets was covered with spherical particles, indicating the successful polymerization of the BPA imprinted layer. Under the best experimental conditions, the PEC sensor response was linearly proportional to the logarithm of BPA concentration in the range of 1.0 nM to 1.0 μM, and the detection limit was 0.179 nM. The method had high stability and good repeatability, and could be applied to the determination of BPA in standard water samples.Keywords:β-Bi2O3;nanosheet;PEC sensor;bisphenol A;molecularly imprinted
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Fang Xu,Dainan Zhang,Gang Wang,Huaiwu Zhang,Yan Yang,Yulong Liao,Lichuan Jin,Yiheng Rao,Jie Li,Fei Xie,Gongwen Gan
NiCuZn ferrite ceramics with high permeability and low magnetic loss have great values in high frequency applications. Here, we synthesized uniform and compact NiCuZn ferrites with small grains (about 1.5 μm) at 875 ° C via adjusting additive amount of Nb 2 O 5 and Bi 2 O 3 . The influence of Bi 2 O 3 additives on the microstructure and magnetic properties of NiCuZn ferrite, especially for grain growth and grain size, have been investigated. SEM results indicated that Nb 2 O 5 can obviously suppress grain growth when a small amount of Bi 2 O 3 was added. Also, the liquid phase of Bi 2 O 3 only can promote movement of grain boundary and reduce porosities between grains. Thus, a NiCuZn ferrite with high permeability ( μ i ′ = 472.79), high saturation flux density ( B s = 0.313 T), high Q value (66.3) and low coercivity ( H c = 94.75 A/m) was obtained when 0.25 wt % Nb 2 O 5 -0.50 wt % Bi 2 O 3 was added. It is proved that improvement of compactness can enhance magnetic properties even though grain growth was suppressed. However, over much Bi 2 O 3 (more than 1.00 wt %) reduced the magnetic properties due to deterioration of grains uniformity and existence of non-magnetic Bi 2 O 3 liquid phase. Such a low temperature solid phase synthesis method (i.e., adding composite additive with different melting point oxide) should also facilitate preparation of other advanced ceramics for practical applications.
研究领域:
材料科学
·
磁学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2014
·Vol. 6
·期 10
·5402-5409
·
IF 6.739
Fan Qin,Huiping Zhao,Guangfang Li,Hao Yang,Ju Li,Runming Wang,Yunling Liu,Juncheng Hu,Hongzhe Sun,Rong Chen
Multifunctional Bi2O3 porous nanospheres (PNs) with tunable size have been successfully synthesized via a facile solvothermal method. The obtained Bi2O3 porous nanospheres demonstrate outstanding performance in visible-light-driven photocatalysis for Cr(VI) and organic dye removal, inactivation of Gram-negative and Gram-positive bacteria, as well as template-synthesis for fabrication of bismuth-related hollow nanostructures.
研究领域:
材料科学
·
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science of Advanced Materials
·
2019
·Vol. 11
·期 1
·105-111
·
IF 1.158
Di Huang,Long Yanju,Luo Lijun,Li Lingxin,Zhang Sifeng,Wang Lulu,Jiang Fengzhi
N-doped Bi2O3 with hierarchical structure was synthesized using precipitation/calcination method. In this method, ethylenediamine was used as both the nitrogen source and morphology controller besides the P123 triblock copolymer as main structure directing agent,
to control the texture and morphology of the catalyst. The microstructure and chemical composition of N-doped Bi2O3 photocatalyst were characterized with XRD, XPS, SEM-EDS, DR UV-vis, and N2 physisorption. The prepared hierarchical N-doped Bi2O3
was used for the photocatalytic degradation of 17β-estradiol (E2) under visible light. The absorption edge of prepared N doped Bi2O3 appeared an obvious red shift comparing with pure phase Bi2O3. This would help photocatalyst make full
use of light source to degrade E2. Under the same conditions of the photocatalytic reaction, the rate constant of degradation of E2 over N-doped Bi2O3 was 6.3 times of that obtained over Bi2O3. The stability of N-doped Bi2O3
and the mechanism of the photocatalytic degradation of E2 under visible light were studied.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Jie-hao Li,Jie Ren,Ying-juan Hao,Er-peng Zhou,Yue Wang,Xiao-jing Wang,Ran Su,Ying Liu,Xue-han Qi,Fa-tang Li
Constructing heterojunctions would result in the change of valence band position, which is an important factor determining the oxidative ability of photo-induced holes, has received scant attention. In this paper, β-Bi 2 O 3 /Bi 2 O 2 CO 3 composites with different ratios were obtained via ionic-liquid-assisted solvothermal and in-situ calcination processes. UV–vis DRS, Mott-Schottky test, and Kelvin probe measurement showed the change of band gaps of β-Bi 2 O 3 and Bi 2 O 2 CO 3 before and after heterojunction formation. SPV, ESR, photocurrent, and scavenger experiments identified the separation efficiency of photo-generated electrons and holes, as well as the active species generated in the photocatalytic process. The photocatalytic mechanism was investigated by the degradation of Rhodamine B (RhB) upon visible-light and simulated sunlight, respectively. The results demonstrated that β-Bi 2 O 3 /Bi 2 O 2 CO 3 heterojunctions possessed enhanced separation efficiency and higher degradation ability than the individuals under visible-light irradiation due to effective electron transfer. However, lower performance under simulated sunlight was observed, although their separation efficiency remained high. The decisive reason for this was that the up-shift of valence band of Bi 2 O 2 CO 3 induced by hybridization and the transition of holes from VB of Bi 2 O 2 CO 3 to that of β-Bi 2 O 3 with more negative potential decreased the oxidative ability of holes, which surpassed the positive influence of enhanced separation efficiency.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Ao Ren,Chunbo Liu,Yuanzhi Hong,Weidong Shi,Shuang Lin,Ping Li
The novel NiFe 2 O 4 /Bi 2 O 3 heterostructures with visible-light-driven photocatalytic activity for antibiotic degradation were prepared by a hydrothermal method following by a microwave-assisted synthetic method. The composition and shapes of NiFe 2 O 4 /Bi 2 O 3 heterostructures were discussed based on the results of X-ray diffraction, scanning electron microscopy, transmission electron microscopy , UV–vis diffuse reflection spectroscopy. For the remove of tetracycline in water, the NiFe 2 O 4 /Bi 2 O 3 heterostructures exhibited significantly higher visible light photocatalytic activity than that of a single semiconductor. The effects of mass ratios between NiFe 2 O 4 and Bi 2 O 3 in the heterostructures on photocatalytic activity were also investigated and the optimal percentage of doped NiFe 2 O 4 was 50%. The enhanced photocatalytic performance of the NiFe 2 O 4 /Bi 2 O 3 heterostructures was mainly ascribed to the band potential of which matched suitably followed by efficient charge separation and transfer across the heterostructures interface. Further the heterostructures can be recovered and recycled under a magnetic field along with good stability.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Semiconductors
·
2016
·Vol. 37
·期 8
·083004
·
IF 0
Ying Wu,Jing Wang,Yunfang Huang,Yuelin Wei,Zhixian Sun,Xuanqing Zheng,Chengkun Zhang,Ningling Zhou,Leqing Fan,Jihuai Wu
Novel, three-dimensional, flower-like Bi2O3/BiVO4 heterojunction photocatalysts have been prepared by the combination of homogeneous precipitation and two-step solvothermal method followed by thermal solution of NaOH etching process. The as-obtained samples were fully characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, Brunauer-Emmett-Teller surface area, and UV—vis diffuse-reflectance spectroscopy in detail. The crystallinity, microstructure, specific surface area, optical property and photocatalytic activity of samples greatly changed depending on solvothermal reaction time. The photocatalytic activities of samples were evaluated on the degradation of methyl orange (MO) under visible-light irradiation. The Bi2O3/BiVO4 exhibited much higher photocatalytic activities than pure BiVO4 and conventional TiO2 (P25). The result revealed that the three-dimensional heterojunction played a critical role in the separation of the electron and hole pairs and enhancement of the interfacial charge transfer efficiency, which was responsible for the enhanced photocatalytic activity.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 32
·e52774
·
IF 3.057
Mohamadou Al Hassan,Mehdi Derradji,Mohsen M. M. Ali,Abdullah Rawashdeh,Jun Wang,Zhong-Cheng Pan,Wen-Bin Liu
Polybenzoxazine (BA-a) based nanocomposites with varying amounts of Bi 2 O 3 particles reinforcement (10, 20, and 30 wt%) were produced. The structures of the Bi 2 O 3 before and after surface silane treatment, as well as the structures of the BA-a matrix and its nanocomposites, were all evaluated using Fourier transform infrared spectroscopy (FTIR). The thermal stability of the samples was evaluated by thermogravimetric analysis (TGA) and the resistance to bending was studied using the three-point bending test. Then, an artificial neural network approach was used to estimate the thermal degradation and flexural strengths of the polybenzoxazine matrix and its nanocomposites. The results of the TGA analysis showed that when Bi 2 O 3 content increased, the char yield ( Y c ) of the nanocomposites also increased from 27.98% to 43.53% for the experimental data and from 27.95% to 43 0.57% for the prediction, with all SD s less than 0.02. Moreover, both the experimental and predicted values of the flexural strengths for the unfilled BA-a displayed 100.40 and 102.96 MPa, respectively and these values increased to 119.65 and 114.95 MPa when 10 wt% of fillers were incorporated into the matrix. However, for higher filler contents, 20 and 30 wt%, these values decreased to 112.94 and 108.01 MPa for the experiments, and 106.35 and 103.20 MPa for the prediction, respectively. The very small deviations (<0.05) between the experimental and predicted values demonstrated that the prediction approach using the artificial neural network is reliable and accurate.
研究领域:
材料科学
·
化学工程
·
人工智能
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Huixuan Zhang,Yingyang Song,Li-chao Nengzi,Jianfeng Gou,Bo Li,Xiuwen Cheng
In this paper, magnetic CuFe 2 O 4 /Bi 2 O 3 composite was successfully fabricated by a simple sol–gel combustion method with an excellent activity in the activation of persulfate (PS) for lomefloxacin (LOM) degradation. The surface morphology and structure characterizations of CuFe 2 O 4 /Bi 2 O 3 were carried out by X-ray diffraction, scanning electron microscope , transmission electron microscope, N 2 physical adsorption/desorption and vibration magnetometer measurements. The CuFe 2 O 4 /Bi 2 O 3 synthesized exhibited high catalytic activity and good stability, it could degrade 77.19% of LOM at the natural pH (6.08), more efficient than CuFe 2 O 4 . Subsequently, the catalytic performances of CuFe 2 O 4 /Bi 2 O 3 during LOM degradation were studied comprehensively under different initial conditions (catalyst dosage (0.6–1.8 g/L), PS dosage (0.6–1.8 g/L), initial pH value (3.0–11.0)). Also, the main active radicals (SO 4 − and OH) were determined by the radical scavenging experiment, which indicated that OH had a higher contribution to remove LOM than SO 4 − in CuFe 2 O 4 /Bi 2 O 3 /PS system. Moreover, the mechanism of the CuFe 2 O 4 /Bi 2 O 3 /PS system for LOM degradation was further proposed and the possible degradation pathways of LOM in CuFe 2 O 4 /Bi 2 O 3 /PS system were deduced. Furthermore, activated sludge inhibition test was performed to determine the variation of toxicity of the LOM during the degradation process. In a word, the CuFe 2 O 4 /Bi 2 O 3 catalyst has a high catalytic efficiency and a short degradation period, indicating that it was a promising catalyst towards LOM wastewater treatment , which had a great potential in environmental protection.
研究领域:
环境科学
·
催化材料
·
污染控制
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Liwei Wang,Liping Gao,Hongjie Liu,Qian Zhang,Hao Fu,Zhelin Liu
In order to quickly and accurately detect and then evaluate the freshness of fish, trimethylamine is used as a landmark gas for detection. In this study, an alternative trimethylamine chemosensor based on Bi 2 O 3 -In 2 O 3 nanofibers (NFs) was synthesized successfully through the electrospinning method. The structure, morphology and chemical states of Bi 2 O 3 -In 2 O 3 NFs were characterized. The results of gas sensing tests indicated that after doping In 2 O 3 with 3 % Bi 2 O 3 , the sensor displays better sensitivity to trimethylamine (48.6–100 ppm), which was 2.9 times higher than pure In 2 O 3 (NTs) gas sensor (16.4) at the optimal operating temperature of 250 °C. Under low concentrations of trimethylamine (0.5 ppm), the 3 % Bi 2 O 3 -In 2 O 3 NFs sensor still has a specific sensitivity (1.3). The increased sensitivity of 3 % Bi 2 O 3 -In 2 O 3 NFs sensor is attributed to the increase of oxygen vacancy, which can be confirmed by XPS and UV- vis methods. The sensor sensitivity decreased as the relative humidity increased, but the response remained at approximately 10 even under a high humidity environment of 90 %. The excellent performances towards trimethylamine indicate that 3 % Bi 2 O 3 -In 2 O 3 NFs are prospective candidates for trimethylamine gas sensor fabrication.
研究领域:
材料科学
·
食品科学
·
化学传感器
✓ 已验证
产品关联
DOI
高影响因子
SENSORS
·
2024
·Vol. 24
·期 20
·6514
·
IF 3.4
Baocang Zhou,Zhihua Zhao,Zhenli Lv,Zhuo Chen,Sibo Kang
The MXene Ti3C2Txwas synthesized using hydrofluoric acid and an improved multilayer method in this study. Subsequently, a Bi2O3/Ti3C2Txcomposite material was produced through hydrothermal synthesis. This composite boasts a unique layered structure, offering a large surface area that provides numerous contact and reaction sites, facilitating the adsorption of ammonia on its surface. The prepared Bi2O3/Ti3C2Tx-based sensor exhibits excellent sensing performance for ammonia gas, including high responsiveness, good repeatability, and rapid response–recovery time. The sensor’s response to 100 ppm ammonia gas is 61%, which is 11.3 times and 1.6 times the response values of the Ti3C2Txgas sensor and Bi2O3gas sensor, with response/recovery times of 61 s/164 s at room temperature, respectively. Additionally, the gas sensitivity mechanism of the Bi2O3/Ti3C2Tx-based sensor was analyzed, and the gas sensing response mechanism was proposed. This study shows that the sensor can effectively enhance the accuracy and precision of ammonia detection at room temperature and has a wide range of application scenarios.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Jian-guo Guo,Ying Liu,Ying-juan Hao,Yi-lei Li,Xiao-jing Wang,Rui-hong Liu,Fa-tang Li
Heterostructured Bi 3 O 4 Br/α-Bi 2 O 3 nanocomposites are prepared via in situ one-step self-combustion of ionic liquids. Tetrabutylammonium bromide (TBAB) is employed to be fuel, complexing agent for ionic liquids, as well as the reactant supplying Br for the objective material. The ratio of Bi 3 O 4 Br/α-Bi 2 O 3 can be easily adjusted by controlling the amount of TBAB. The heterojunctions show higher photocatalytic ability towards both azo dye methyl orange (MO) and colorless pollutant phenol . The electron spin resonance (ESR) test and p-nitro blue tetrazolium chloride (NBT) degradation result indicate that generation amounts of superoxide anion radicals ( O 2 − ) over heterojunctions are less than that over pure Bi 3 O 4 Br. Photoelectrochemical measurements show that separation efficiencies of photo-generated electrons and holes are decreased after the combination of Bi 3 O 4 Br and α-Bi 2 O 3 . Work function test and scavenger experiments display that holes play key role for pollutant degradation and the position of holes on α-Bi 2 O 3 is lowered via hybridization. Thus, the enhanced photocatalytic activity over composites can be attributed to the position decline of α-Bi 2 O 3 valence band, thus improving the reactivity of holes in direct oxidation of pollutants. In this case, valence band position is confirmed to be more important than separation efficiency of charge carriers in affecting photocatalytic performance.
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
危险品化学品经营许可证（带存储）