JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2022
·
IF 4.458
Wei Dang,Bowen Wang,Zhuoli Xu,Xinyuan Zhang,Fuping Li,Kang Zhao,Xu Hu,Yufei Tang
ZrO 2 nanofiber aerogels with carbon as fiber junction were fabricated by freeze drying. The effects of resorcinol-formaldehyde (RF) content and fiber content on the pore structure , thermal property and compressive property of ZrO 2 /C nanofiber aerogels were systematically investigated. ZrO 2 /C nanofiber aerogels have ultra-high porosity above 99.4%, and possess hierarchical pore structure with honeycomb pores in the micro-scale and minor pores in the nano-scale. Both RF content and fiber content have effects on the porosity, thermal conductivity and plateau stress of ZrO 2 /C nanofiber aerogels. Thermal conductivity is in the range of 0.0332–0.036 W·m −1 ·K −1 . With the increase in RF content or fiber content, both thermal conductivity and plateau stress increase. The thermal transfer mode and compressive deformation mode were analyzed. Fiber junctions play a significant role during the thermal transfer and compression of ZrO 2 /C nanofiber aerogels.
研究领域:
材料科学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haoru Shan,Wenqiang Wang,Zhirong Wang,Jianlong Ge,Qixia Liu,Wei Zhang,Qiuxia Fu
Constructing CuO-based nanofibrous membranes with remarkable mechanical performance, controllable nanostructures, and outstanding catalytic oxidation activity would be conducive to decomposing organic contaminants in wastewater through advanced oxidation processes; however, there remains a huge shortfall of such ceramic membranes that they are usually fragile with poor deformability. Herein, a universal approach was proposed for fabricating flexible CuO nanoparticles-anchored ZrO 2 nanofibrous membranes (CZNMs), that is, through the combination of successive ionic layer adsorption and reaction (SILAR) assembly and the follow-up thermal oxidation processes. Notably, the developed preparation method exhibited strong expansibility, which could be extended to the synthesis of other flexible metal oxides/ceramic nanofibrous composites, such as ZnO/ZrO 2 , CdO/ZrO 2 , and Mn 3 O 4 /ZrO 2 . Profiting from the integrated advantages of superior catalytic reactivity, uniform nanostructures distribution, and excellent mechanical properties, the resultant CZNMs displayed a prominent degradation efficiency of 92.4% within 50 min towards tetracycline hydrochloride under the activation of peroxymonosulfate (PMS). Furthermore, the stable hierarchical structures and robust mechanical performance endow the as-synthesized membranes with extraordinary reusability and easy recycling. The successful preparation of such ceramic-based nanofibrous membranes with superior flexibility and high-efficient catalytic performance might provide some reference to develop other synergetic membranous catalysts for wastewater treatment.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 9
·096507
·
IF 3.1
Yiwei Sun,Fenjuan Shao,Yuting Luo,Haoxiang Wang,Yuyang He,Liying Sun,Dongpo Xu
An efficient molecularly-imprinted electrochemical sensor for the detection of ampicillin was prepared using polypyrrole tetracycline polymer modified with ZrO2 nanofibers. The ZrO2 nanofibers prepared by electrostatic spinning increased the surface area of the electrode with the binding sites of the electropolymerized membrane. The ampicillin sensor with polypyrrole as the functional monomer was able to specifically bind ampicillin molecules and detect ampicillin in various types of samples. In this study, cyclic voltammetry and differential pulse voltammetry were used to evaluate the electrochemical performance of ZrO2-MIP. Under the optimized conditions, the detection limit of this sensor was 0.397 nM, the detection range was 0.5 ∼ 500 nM, and the R2 reached 0.998. It has good selectivity, reproducibility, and stability, and achieves the AMP detection of the milk of the actual samples, which has a good prospect of application.
研究领域:
生物传感技术
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药物分析
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Qianchun Zhang,Qin Zhou,Shan Tang,Yuxian Zhao,Yuguo Zheng,Li Jiang
Novel sugar-coated haws-sticklike Au/ZrO 2 nanofibers were fabricated by a solvothermal method using a simple precipitation approach. The nanostructure , surface morphology , and elementary composition of the Au/ZrO 2 nanofibers were explored by X-ray diffractometry, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy , N 2 adsorption-desorption isotherms, and energy dispersive spectroscopy . The unique sugar-coated haws sticklike structure with multiple crystal faces (111) as active sites enhanced greatly cataluminescence property for propanal , and the developed propanal sensor based on Au/ZrO 2 nanofibers demonstrated good analytical characteristics with super-fast detection, high sensitivity, and selectivity. The response and recovery time were 1 and 5 s, respectively, the useable linear range was 0.181–38.8 mg/m 3 with a low limit of detection of 0.060 mg/m 3 , and the stability was proved to be fairly excellent for at least 120 days. Besides, the sensor was successfully applied to the analysis of propanal in real samples, and satisfactory recoveries (90.1–109%) with RSDs of 2.6–8.4% were achieved. Moreover, the cataluminescence sensing mechanism was further investigated by density functional theory and GC/MS analysis. The developed methodology has broad application prospects for the detection of propanal at low concentrations.
研究领域:
纳米材料科学
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分析化学
·
环境监测
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 10
·1859-1865
·
IF 3.756
Shouzhen Li,Fan Wu,Xuan Zhang,Guangting Han,Yang Si,Jianyong Yu,Bin Ding
Developing ceramic materials for thermal insulation is vital for various applications. However, ceramics have been considered intrinsically rigid and brittle due to the limited crystallographic slips and structural collapse during service. Their lack of flexibility has hampered many high-end applications of ceramic materials. We developed flexible Al2O3/ZrO2 nanofibrous membranes via sol–gel electrospinning and calcination. Al2O3/ZrO2 nanofibrous membranes had flexibility from −196 °C to 1300 °C and low thermal conductivity (∼0.03166 W m−1 K−1 at room temperature). They also supported 1350-times their weight without suffering structual damage. Hence, Al2O3/ZrO2 nanofibrous membranes could be used for thermal insulation in aerospace and industrial fields, and even in harsh environments.
研究领域:
材料科学
·
热工程
·
纳米技术
✓ 已验证
DOI
高影响因子
E-POLYMERS
·
2016
·Vol. 17
·期 3
·243-248
·
IF 0.812
Weidong Han,Bin Ding,Mira Park,Fuhai Cui,Su-Hyeong Chae,Hak-Yong Kim
Poly(vinyl pyrrolidone) (PVP)/La 3+ /Zr 4+ precursor nanofibrous membranes (LZPNM) with various Zr contents were synthesized via a simple electrospinning method. By controlling the Zr incorporation, the tensile properties of precursor membranes dramatically change from 0.77 to 1.73 MPa. Meanwhile, the average diameters of precursor nanofibers increase with the increase of Zr contents (from 283 to 535 nm). In addition, flexible La 2 O 3 -ZrO 2 nanofibrous membranes (LZNM) were obtained by calcination of corresponding precursor membranes. Furthermore, the structures and morphologies of the precursor membranes were investigated using X-ray powder diffraction analysis (XRD) and field-emission scanning electron microscopy (FE-SEM). The surface functional groups and thermal properties of the precursor membranes were measured via Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA).
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 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）