COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zhenyang Li,Kai Yang,Pengxiang Zhang,Yunfan Wang,Jian Peng,Bao-Wen Li
Two-dimensional (2D) materials have exhibited significant potential in the field of metal anticorrosion coatings. However, nanosheets with high electrical conductivity may promote “corrosion-enhancing activity,” thereby compromising the protective efficacy of the coating. In contrast, metal oxide nanosheets derived from layered compounds present a promising alternative due to their favorable properties. In this study, a composite ink for AZ31 magnesium alloy anticorrosion with blade coating method is fabricated by polydopamine (PDA)-coated ZrO 2 nanosheets/polyvinylidene fluoride (PVDF). The surface composition and microstructure of the resulting coating are systematically characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The anticorrosion properties of the composite coating are evaluated through potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The electrochemical results demonstrate that the ZrO 2 @PDA/PVDF coating achieves a corrosion protection efficiency of 99.93 %, with a corrosion current density of 9.48 × 10 −8 A·cm −2 , which is three orders of magnitude lower than that of bare AZ31. This study provides a new insight into the scalable application of metal oxide nanosheets in metal anticorrosion coatings.
研究领域:
材料科学
·
电化学
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Industrial and Engineering Polymer Research
·
2025
·
IF 12
Shuo Zhang,Qian Zhang,Xiaowei Huang,Xin Ning,Jinfa Ming
Daytime radiative cooling as an environmentally energy-saving strategy, achieves cooling without any power consumption by reflecting sunlight and radiating energy to outer space. In our work, an eco-friendly and degradable poly(lactic acid) (PLA) fibers derived from discarded nonwovens are used to prepare aerogels by combing with ZrO 2 nanoparticles with silane coupling agent (VTMS) crosslinking. The composite aerogel with low density (26.3-30.7 mg/cm 3 ) exhibits high solar reflectance (77%), emissivity (94.31%), low thermal conductivity, and high compressive stress (9.0 kPa under 60% compressive strain). Thermal insulation test demonstrates that the aerogel can achieve temperature drops of 31.3 °C and 41.4 °C under the temperature of heating table 60 °C and 80 °C. Radiative cooling test shows aerogel with 15 wt% ZrO 2 can achieve a temperature drop of 9.14 °C during daytime. Meanwhile, the aerogel cooler presents excellent superhydrophobic (150°), self-cleaning performance, and cyclic compression performance. This findings will promote the field of passive radiative cooling toward a greener and more sustainable direction.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xinyi Wang,Qinrui Chen,Juanjuan Wen,Chengyu Nie,Wei Ke,Xiaowei Da,Xianfu Chen,Minhui Qiu,Yiqun Fan
Long-chain dicarboxylic acids (LCDAs) are important basic chemical raw materials, and their bio-synthesis has gained increasing prominence in recent years. However, the pigments formed during the biological process have a significant impact on the purity of the product. In this study, a TiO 2 -ZrO 2 ceramic nanofiltration (NF) membrane with tunable pore size was developed and used for efficient decolorization of LCDA fermentation broth. Based on the inhibitory effect of Ti doping on ZrO 2 phase transition, combining the steric hindrance effect of organic residues, NF membranes with regulable molecular weight cut-off (600/1100/1600 Da) can be achieved by controlling calcination temperature in range of 350–450 ℃. They all have a rejection of over 98.8 % for the larger molecular weight pigments (DY9, AY3 and AY23), and the rejection for the smaller SY pigment is also above 90 %. In addition, the NF membranes exhibited excellent performance in crude sebacic acid aqueous solution. With a sebacic acid salt rejection of less than 5 % and a pigment rejection of over 90 %, they achieved simultaneous efficient decolorization and product recovery. Finally, the multi-channel NF membrane prepared at 400 ℃ calcination temperature achieved excellent decolorization performance in the real dodecanedioic acid fermentation broth, increasing the purity of acid after acidification crystallization from 98.62 % to 99.56 %. This verified its application potential in the industrial treatment of LCDA fermentation broth.
研究领域:
材料科学
·
化学工程
·
膜分离技术
·
生物化工
·
纳米材料
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·Vol. 44
·期 9
·10094-10098
·
IF 3.057
Yi-hang Fang,Xian-rui Zhao,Meng-xian Zhang,Ping Zhang,Li Zhang,Hu Cheng,Jian-bo Wu,Shang-shen Feng
Monoclinic rod-shaped ZrO 2 whiskers were prepared in liquid conditions using a sulfate flux with ZnSO 4 and Na 2 SO 4 in an alumina crucible. TG-DSC, XRD , SEM, TEM , HRTEM , SAED and EDS were employed to characterize the structure, morphology and growth mechanism of the as-synthesized whiskers. The results demonstrated that both the heating temperature and holding time influence the formation of ZrO 2 whiskers. When the heating temperature and holding time were 900 °C and 30 min, the ZrO 2 whiskers were elongated along the [ 0 1 ¯ 1 ] direction, had an average length and diameter of 600 nm and 70 nm, and exhibited a well-crystallized, one-dimensional structure and smooth surface with no distinct defects. The growth of the whiskers was dominated by the liquid-solid (LS) growth mechanism, affording anisotropic growth through dissolution/recrystallization.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 16
·24799-24804
·
IF 3.83
Pengfei Pan,Xu Wang,Yaqi Ji,Wumei Dong,Lei Zhang,Ling Wang,Ming Zhang
A simple, efficient and low-cost method to synthesize zirconia nanopowders dispersed with graphene by wet ball milling was reported in this paper. The raw material for ball milling is cheap graphite powder rather than expensive graphene. Graphite powders were exfoliated into graphene nanosheets (GNSs) in the process of ball milling, as a result of strong shear forces and moderate impact forces between graphite powders, milling balls, and ZrO 2 nanoparticles . The mixed powders were milled for 3, 10, 20, 30, 40, and 50 h, respectively. Moreover, the morphology, composition and structure of the mixed powders milled were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy , Fourier transform infrared spectroscopy , and field emission transmission electron microscopy . Results showed that the graphite powders were exfoliated effectively, and the GNSs were dispersed uniformly in the zirconia simultaneously. The presence of zirconia nanoparticles significantly improved the efficiency of ball milling exfoliation.
研究领域:
材料科学
·
纳米技术
·
无机非金属材料
·
复合材料
✓ 已验证
DOI
高影响因子
TOPICS IN CATALYSIS
·
2026
·
IF 3.7
Chang Fei,Shen Min,Ruan Yunfei,Zhou Quan
In this paper, bifunctional mesoporous MoO 3 /ZrO 2 composite was prepared by co-precipitation method using cetyltrimethylammonium bromide (CTAB) as template agent for the photodegradation of tetracyclines (TCs). In order to study the catalyst performances, catalyst was characterized via XRD, Raman, SEM, TEM, BET, and Py-IR. Results showing that the catalyst is a bifunctional acid ( B and L) mesoporous catalyst with the MoO 3 monolayer embedded in the ZrO 2 , which specific surface area (SSA) is 69.0318 m 2 /g and an average pore size is 11.6948 nm. In order to study the degradation target of the MoO 3 / ZrO 2 for TCs, photodegradation of Isotope-labeled [2H 6 ]-TC and [2H 3 ]-DOX was detected by HPLC-MS. The results showed that the target of TC and DOX was concentrated on C4 of the A ring. The difference was that TC underwent oxidative dehydrogenation of α-dimethylamino group at the C4 position of the A ring, while DOX was demethylated at the C4 of the A ring, moreover, the-NH 2 of the C1 and the -OH of C3 formed a five-membered ring structure and removed H 2 O.
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2023
·Vol. 49
·期 7
·3029-3044
·
IF 3.3
Deng Renjie,Cui Haishuai,Liu Meilin,Ni Wenjin,Tian Yao,Liu Huajie
Different solid superacid sulfated zirconium dioxide (SO 4 2− /ZrO 2 ) samples were successfully prepared by conventional and ultrasonic-assisted chemical precipitation process, and then, they were characterized by X-ray diffraction, Fourier transform infrared, thermal gravimetric analyzer (TGA), nitrogen adsorption–desorption, ammonia temperature programmed desorption (NH 3 -TPD) and pyridine adsorbs Fourier transform infrared. The results of characterizations indicate that the sulfonic acid group is successfully introduced, and the acidity and surface area of sulfated sample can be increased by using ultrasonic method. Furthermore, this ultrasonic-assisted catalyst was used for the chlorobenzene nitration using nitrogen dioxide (NO 2 ) as nitrating agent. The catalyst shows excellent catalytic activity and reusability for the nitration of chlorobenzene giving high para -selectivity. In the optimal reaction conditions, the conversion of chlorobenzene can reach 85.2% with 88.5% selectivity to para- nitrochlorobenzene ( p -NCB). Furthermore, the reaction mechanism was proposed by combination of experimental results and theoretical calculations. The present work provides an easy-to-implement, mild and environmentally friendly approach for the efficient preparation of valuable p -NCB, which has extensive industrial application prospects. Graphical abstract
研究领域:
催化
·
有机化学
·
材料科学
·
化学合成
·
环境化学
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
Changchang Dong,Feng Wei,Jiadong Li,Qiao Lu,Xiaojun Han
The electrochemical ammonia synthesis under ambient conditions is a promising process instead of the energy-intensity Haber-Bosch process with the release of huge greenhouse gases. But it still faces sluggish catalytic kinetics owing to difficulty of N 2 adsorption and N≡N bond cleavage. Herein, the uniform ZrO 2 @C with octahedral structure is synthesized via two-step annealing treatment of UiO-66. The formation of ZrO 2 originates from Zr and O elements in UiO-66, and the grain size is confined by the produced carbon matrix from the carbonization of the organic ligand, resulting in more exposure of the active sites. ZrO 2 @C obtained at 650 °C presents excellent electrocatalytic nitrogen reduction performance with a NH 3 yield rate of 6.72 μg h −1 mg cat. −1 and a Faradaic efficiency of 2.68% at −0.6 V versus reversible hydrogen electrode (RHE). This work provides a strategy to design metal oxide@C from metal-organic frameworks for nitrogen fixation.
研究领域:
材料科学
·
电化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2021
·Vol. 11
·期 12
·1464
·
IF 4.146
Su Yang,Xiaoxuan Guo,Xiaomei Pan,Liuyu Gu,Xueping Liu,Lijing Gao,Guomin Xiao
Concentrated sulfuric acid is generally used as a catalyst for producing brominated alkanes in traditional methods, but is highly corrosive and difficult to separate. This work reports the preparation of bromopropane from n-propanol based on a reactive distillation strategy combined with alumina-modified sulfated zirconia (Al2O3/SO42−/ZrO2) as a heterogenous catalyst. As expected, under the optimum reaction conditions (110 °C), the yield of bromopropane was 96.18% without side reactions due to the reactive distillation strategy. Meanwhile, the microscopic morphology and performance of Al2O3/SO42−/ZrO2were evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Brunner–Emmet–Teller (BET), Fourier transform infrared spectroscopy (FT–IR), and other characterization methods. The results confirmed that the morphology of zirconia sulfate is effectively regulated by the modification method of alumina, and more edges and angles provide more catalytic acid sites for the reaction. Furthermore, Al2O3/SO42−/ZrO2exhibited high stability and remarkable reusability due to the strong chemical bond Zr–Al–Zr. This work provides a practical method for the preparation of bromopropane and can be further extended to the preparation of other bromoalkanes.Keywords:sulfated zirconia;modification of alumina;bromopropane;catalytic distillation
研究领域:
化学工程
·
催化
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 19
·4233
·
IF 4.967
Yang Ji,Mengdie Hou,Jin Zhang,Meiqi Jin,Tianlin Wang,Huazhe Yang,Xiaodong Zhang
In the field of bone repair, the inorganic–organic composite scaffold is a promising strategy for mimicking the compositions of the natural bone. In addition, as implants for repairing load-bearing sites, an inert permanent bone substitute composites with bioactive degradable ingredients may make full use of the composite scaffold. Herein, the porous zirconia (ZrO2) matrix was prepared via the template replication method, and the partial degradable ZrO2–chitosan particles–GelMA composite scaffolds with different chitosan/GelMA volume ratios were prepared through the vacuum infiltration method. Dynamic light scattering (DLS) and the scanning electron microscope (SEM) were adopted to observe the size of the chitosan particles and the morphologies of the composites scaffold. The mechanical properties, swelling properties, and degradation properties of the composite scaffolds were also characterized by the mechanical properties testing machine and immersion tests. The CCK-8 assay was adopted to test the biocompatibility of the composite scaffold preliminarily. The results show that chitosan particles as small as 60 nm were obtained. In addition, the ratio of chitosan/GelMA can influence the mechanical properties and the swelling and degradation behaviors of the composites scaffold. Furthermore, improved cell proliferation performance was obtained for the composite scaffolds.Keywords:porous zirconia matrix;chitosan particles;GelMA;composite scaffold
研究领域:
生物医学工程
·
材料科学
·
组织工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
X.T. Song,G.H. Fan,Y. Liu,R.H. Fan
Composites featuring negative permittivity have garnered significant attention for their potential in novel capacitance designs, coil-less electrical inductors, and electromagnetic shielding applications. In this study, we prepared polyvinylidene fluoride (PVDF) matrix composites filled with ZrO 2 /C nanoparticles derived from metal-organic frameworks (MOFs) via a hot-pressing method. With an increase in the ZrO 2 /C content to 30 wt.%, electrical percolation was observed, accompanied by a transition mechanism from hopping conduction to metal-like conduction. This enabled the realization of ZrO 2 /C/PVDF composites with tailorable negative permittivity properties, attributed to the plasmonic oscillation of free electrons in the composites beyond the percolation threshold (30 wt.%). Furthermore, the permittivity transition along to a shift in the electrical behavior of the percolative composites from capacitive to inductive. We explored the regulatory mechanism behind the negative permittivity in this random composite system, and our findings highlight the potential of these tunable negative permittivity media as promising candidates for diverse electromagnetic applications.
研究领域:
材料科学
·
电磁学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2020
·
IF 5.797
Xuefeng Liu,Quan Zhang,Jianmin Liu,Tao Wang,Yanqiao Xu,Jian Liang,Feng Jiang,Guo Feng,Weihui Jiang
The simultaneous control of crystal phase stability and one-dimensional growth has always been the major challenge for the preparation of tetragonal zirconia whiskers. In this study, we report a facile molten salt processing that utilizes CaF 2 as a stabilizer and adsorbent to meet the phase and morphology requirements. The processes of stabilization, phase transition, ion adsorption and formation of special morphology involved in zirconia growth were investigated by XRD, IR, SEM, DTA-TG and TEM. By controlling the amount of CaF 2 (15 wt%) added in the reaction precursor, tetragonal zirconia whiskers with a desired aspect ratio (>16) can be synthesized, which show single crystalline nature and [001] preferred direction. Ca ions doped at low temperature inhibit the occurrence of phase transition, which allows the tetragonal structure to be retained to room temperature. The inducement and pattern of whisker growth are supposed to be F-adsorption and screw dislocation elongation, respectively. The specific selectivity of surface adsorbed ions to certain zirconia crystal planes reduces or even inhibits the epitaxial growth rate in this direction, offering a viable avenue for the morphology modulation of inorganic nanomaterials.
研究领域:
材料科学
·
晶体学
✓ 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）