PROGRESS IN ORGANIC COATINGS
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2022
·
IF 6.206
Shuhui Liu,Hui Xie,Qingmin Cao,Yujie Ning,Yihan Song,Chengdong Zhang,Bin Liu
This research aims to improve the protective performance of coatings in harsh corrosive conditions by using functionalized self-healing microcapsules. CeO 2 /PUF MCs and PUF MCs were prepared via one-step emulsion polymerization . The microcapsules were implanted into epoxy coatings to investigate their self-healing performance. Multiple testing techniques, including SEM, FTIR, XRD , TGA , EIS , and NSS were used to characterize the morphology, crystal structure, chemical composition, thermal properties, and self-healing performance of the microcapsules and coatings. The experimental results indicated that the CeO 2 /PUF MCs had a spherical core-shell structure with a rough surface and an average diameter of 1583 nm. Meanwhile, the minimum corrosion products and the highest low-frequency impedance were found in CeO 2 /PUF MCs coating with artificial scratch, which demonstrated that the self-healing and anti-corrosion performance were significantly improved by the newly developed bi-functional microcapsules.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Yuanhui Gao,Guogang Xu,Peng Zhao,Lulu Liu,Enliang Zhang
Developing a permeation property and reducing the cost for ceramic microfiltration membrane are significant challenges and target. In this study, a gradient structure ceramic microfiltration membrane with mullite/alumina whisker bi-layer was successfully prepared using the dry-pressing method and one-step co-sintering process. In addition, the co-sintering conditions of substrate and whisker layer, the pore size regulations of whisker layer and emulsified oily wastewater filtration performance of the ceramic microfiltration membranes were systematically investigated. The gradient structure ceramic microfiltration membranes with high bonding strength and flexural strength were obtained under a co-sintering temperature of 1300 °C, and the average pore size of ceramic membrane was approximated in 120 nm, through the coordinated adjustment of the gradient layer by mullite whisker and alumina whisker. The filter performance results showed that with the synergistic effect of high porosity and low tortuosity of the whisker stacking membrane structure, the obtained ceramic membrane exhibited high permeability performance and oil rejection efficiency. The separation fluxes of oil-in-water emulsion with 500 and 1000 mg/L were 901 and 547 L/(m 2 ·h·bar), respectively, and the oil rejection efficiency was higher than 99%. Even after 10 filtration cycles, the separation flux was still steady at 415 L/(m 2 ·h·bar) for the separation process of oil-in-water emulsion with 1000 mg/L. In conclusion, the excellent pore structure of ceramic membrane with whisker layer endowed the separation flux for the oil-in-water emulsion, and the one-step co-sintering indicated a promising practical application for reducing the cost of ceramic microfiltration membranes.
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MICROCHEMICAL JOURNAL
·
2021
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IF 4.821
Wen-Juan Wang,Xin-Yang Lu,Fen-Ying Kong,Heng-Ye Li,Zhong-Xia Wang,Wei Wang
A reduced graphene oxide supported Au-Bi bimetallic nanoparticles (rGO/Au-Bi) have been synthesized and employed as a novel sensing platform for electrochemical determination of Pb 2+ and Cd 2+ simultaneously. The successful formation of rGO/Au-Bi nanocomposites was investigated by means of transmission electron microscopy and X-ray photoelectron spectroscopy. At the rGO/Au-Bi nanocomposites modified electrode, two well-resolved voltammetric peaks for Pb 2+ and Cd 2+ were observed in differential pulse anodic stripping voltammetry (DPASV) measurements. Under the optimized conditions (pH 4.5, deposition potential −1.0 V, deposition time 200 s), the DPASV response currents demonstrated good linearity with the concentration of Pb 2+ (0.1–500 μg L −1 ) and Cd 2+ (0.1–300 μg L −1 ). The detection limits was 0.05 μM for Pb 2+ and 0.02 μM for Cd 2+ , respectively. In addition, the proposed electrode exhibited outstanding resistance to potentially interferents, high stability and excellent repeatability. Satisfactory application of proposed electrode was also demonstrated by the determination of Pb 2+ and Cd 2+ in real river water samples.
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高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Sihan Yang,Xuyan Xue,Ziying Wang,Qi Zhu,Xuejiao Wang,Ji-Guang Li
In this work, a series of broad-band green phosphors SrLaScO 4 : x Bi 3+ ( x = 0–0.1) were synthesized using the traditional solid-state method, and the luminescence was effectively enhanced via multi cationic partial substitution strategy. The SrLaScO 4 : x Bi 3+ phosphors all exhibit a wide emission band with a full width at half-maximum (FWHM) of 115–148 nm in the range of 450–700 nm upon excitation at 333 nm, effectively filling the cyan gap and peaking at 505 nm. It is proved that the observed luminescence originates from both the 3 P 1 state of Bi 3+ in [(Sr/La)O 8 ] site and the Bi 3+ - to - Sc 3+ metal to metal charge transfer (MMCT) state. The optimal concentration of Bi 3+ doped SrLaScO 4 phosphor is 1 at%, and the concentration quenching mechanism is the dipole-dipole interaction. Remarkably, the luminescence intensity of the phosphor is 198.4 % increased by partially replacing Sr 2+ ions with Mg 2+ . Due to the good matching of the excitation wavelength of the phosphor with the near-UV chip, a high-quality WLED device with color stability and high color rendering index ( Ra = 92.1) was prepared by combining commercial phosphor with SrLaScO 4 :0.01Bi 3+ phosphor. We anticipate that this work can provide new ideas for finding high-performance phosphors for high color rendering index pc-WLED.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zhihui Cheng,Xingshi Li,Shuo Jiao,Dongyuan Miao,Xiaojie Yu,Hua Ni,Yuyue Geng,Ming Wang,Yaoguo Huang,Yali Zhang
A novel 3-lauramide propyl ester-4-amino-1,2,4-triazole-5-thione modified polyacrylic acid resin (LmPATT-reD113), comprising a bi-ligand amide-based triazole-thione moiety and a carboxylic acid moiety, was prepared and employed for the effective removal of Cu(II) from wastewater. The adsorption experiments demonstrated that the maximum adsorption capacity of LmPATT-reD113 for Cu (II) was 191.94 mg/g, which was 3.03 times higher than that of the polyacrylic acid resin (D113). LmPATT-reD113 and D113 had penetration times of 200 and 150 min, and equilibrium times of 1000 and 675 min, respectively. Column adsorption results showed LmPATT-reD113 outperformed D113. After four adsorption–desorption cycles, LmPATT-reD113 maintained superior performance with a desorption efficiency of 93.23 %. The adsorption kinetics and thermodynamics showed that LmPATT-reD113 to Cu(II) followed the pseudo-second-order kinetic and Langmuir isotherm models, with Δ H , Δ S , and Δ G values of 24.836 kJ/mol, 102.187 J/(mol·K) and −3.092kJ/mol at 298.15 K, respectively. Moreover, the adsorption mechanism was investigated using X-ray photoelectron spectroscopy (XPS) and density-functional theory (DFT), the results showed that the affinity of LmPATT-reD113 for Cu(II) mainly originated from the formation of five-membered rings by C=S and C–N complexed with Cu(II) and the formation of porous structure by O=C–NH molecules through intermolecular hydrogen bonding to promote the adsorption of copper.
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高影响因子
Small
·
2025
·
IF 12.1
Jie Huang,Kangpeng Jin,Chen Li,Hao Yang,Yiming Zhang,Xiyang Wang,Ming Huang,Zhen-Hua Ge,Liangwei Fu
Maximizing the average figure-of-merit ( ZT avg ) of thermoelectric (TE) materials is crucial for optimizing the module performance. Herein, this work enhances the ZT avg to 1.42 (298–673 K) in a n-type Mg 3 (Sb, Bi) 2 -based material by a stepwise optimization strategy. Specifically, Cr injects electron into Mg 3 Sb 0.8 Bi 1.19 Te 0.01 , which synergistically boosts carrier concentration and forms an electron accumulation layer at the interface. Meanwhile, lattice softening and interfacial scattering suppress lattice thermal conductivity. A peak ZT of 1.72 at 673 K and ZT avg of 1.30 over 298–673 K are achieved for Mg 3 Sb 0.8 Bi 1.19 Te 0.01 –1.5 wt.% Cr. Then, through grain refinement and Se doping instead of Te, a delicate equipoise is reached between the power factor and the electronic thermal conductivity. Eventually, the Mg 3 Sb 0.8 Bi 1.19 Se 0.01 –1.5 wt.% Cr sample obtains an outstanding ZT of ≈1.9 at 573 K and ZT avg of 1.42 over 298–673 K. The integrated two-pair full-Zintl YbZn 2 Sb 2 /Mg 3 (Sb, Bi) 2 module achieves a high conversion efficiency of 10.5% and power density of 0.37 W cm −2 simultaneously under a temperature difference of 370 K. More importantly, this module exhibits excellent thermal stability during a 10-day in situ test. This work provides new ideas for applications of full-Zintl modules to the recovery of waste heat.
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PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2010
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IF 2.652
Wan-Zhong Lang,Xun-Wen Liu,Ya-Jun Guo,Bo Su,Lian-Feng Chu,Cui-Xiang Guo
We have demonstrated the synthesis of a novel MCM-41-supported bi-functional catalyst containing organoamine and Rh–P complex. We further characterized the catalysts by state-of-the-art analytical techniques including FTIR, UV–vis, 31 P CP MAS NMR, TGA, XRD, BET, TEM, ICP-AES and elemental analysis. The as-synthesized catalyst was applied to the one-pot synthesis of 2-ethylhexenal using propene as raw materials. FTIR, UV–vis, 31 P CP MAS NMR, and TGA results indicate that the active sites, organoamine and Rh–P complex, are successfully immobilized on the surface of catalyst support. The N and Rh content can be adjusted by adding different amounts of organoamine and Rh–P complex during the process of catalyst preparation. The mesoporous structure of the zeolite support remains intact after immobilization. However, the specific surface area and BJH pore size of the mesoporous zeolite support decrease after being grafted with organoamine and Rh–P complex. The bi-functional catalyst with primary amine has the best catalytic performances for the one-pot synthesis of 2-ethylhexenal since it has better synergistic effect with silanol groups, followed by diamine and then tertiary amine. The Rh content of the catalyst determines the hydroformylation reaction rate of propene, while the self-condensation of n -butanal is determined by the balance between organoamine and silanol groups. The results indicate the hydroformylation reaction is the control step of this tandem reaction when the content of Rh in the catalyst is below 0.19%. In contrast, this tandem reaction is controlled by the self-condensation of n -butanal with further increasing Rh content. We found that the catalyst containing 1.73% of N (primary amine) and 0.19% of Rh is a suitable choice. And we obtained the best yield of 2-ethylhexenal above 77% in the one-pot synthesis from propene.
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高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 43
·23319-23329
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IF 11.9
Bang-Zhou Tian,Yi-Yan Liao,Fang Xu,Xiao-Ling Qiu,Fu-Jie Zhang,Ran Ang
Interfacial modulation has been considered an effective strategy to enhance the thermoelectric (TE) performance by decoupling thermal and electrical parameters. However, inappropriate interfacial heterojunctions can significantly deteriorate electrical transport while enhancing phonon scattering, which causes no substantial improvement in TE performance. Herein, we introduce two-dimensional graphene or MXene into the Mg3.2Sb0.5Bi1.49Te0.01 matrix by ball mixing combined with rapid sintering to modify the composition and structure at the interface. The differences in morphology, size and distribution of interfacial graphene and MXene lead to distinct results which show that incorporated graphene flakes with larger size hinder the carrier transport, while the homogeneously dispersed tiny MXene provides improved carrier channels and boosts the mobility. On the other hand, such uniformly diffused heterogeneous MXene structures create stronger scattering on phonons compared to enriched graphene phases, resulting in a low lattice thermal conductivity of ∼0.66 W m−1 K−1 and enhanced zT of ∼1.0 at 513 K in Mg3.2Sb0.5Bi1.49Te0.01-0.6 wt% MXene with good component stability in air. This work highlights the importance of size, concentration, and distribution in the interfacial modulation strategy, demonstrating an effective method for developing high TE performance Mg3(Sb, Bi)2-based near-room-temperature materials.
研究领域:
材料科学
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凝聚态物理
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纳米材料
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能源材料
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固体化学
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高影响因子
Journal of Materials Chemistry A
·
2026
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IF 9.2
Zhihao Xing,Jing Xie,Zhende Wu,Jindou Hu,Zhen-Jiang Lu,Xiaoqing Xue,Faxiu Zhang,Yali Cao
Synchronously extending the light-harvesting window and accelerating photogenerated carrier migration still present a contradiction in photothermal catalytic CO2 reduction. Herein, BiOBr-based nanosheets (BOB-20) with triple active sites of Bi NPs, amorphous carbon and oxygen vacancies (Ov) were constructed via a in-situ solid-phase reduction. On account of the localized surface plasmon resonance (LSPR) effect of Bi NPs that can serve as electron transport hubs to enhance visible light absorption and induces photothermal effect to raise temperature of catalyst, as well as highly conductive porous C nanoplates as electronic export medium that can speed the separation and transportation of chargers, meanwhile, Ov can promote CO2 adsorption/activation via enhanced local electron states. Ultimately, BOB-20 achieves a CO generation rate as high as 43.99 μmol g -1 under visible light, which is 3.9 times higher than that of the pristine BiOBr (11.15 μmol g -1 ). This study proposes a green and low-cost solvent-free strategy for CO2 conversion strategy that from the synthesis of catalyst to the final application aspect.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yu Han,Jingkai Nie,Xiaochuan Huang,Xuan Li,Shaofeng Zhang,Zhen Xu,Donghui Wang,Qiang He,Jian Zhou,Ran Xu
The tungsten-bronze-type Ba 6-3x Sm 8+2x Ti 18 O 54 ceramic materials exhibit fantastic application potential in electronic devices owing to their superior microwave dielectric properties. However, the huge challenge of realizing high dielectric constant accompanied by ultralow dielectric loss still exists and has become a critical bottleneck impeding the operation of multilayer ceramic capacitors (MLCCs) and capacitive voltage dividers in the low-frequency range. Herein, we report high dielectric constant and ultralow dielectric loss performance of Ba 4 (Sm 1-x-y Bi x Nd y ) 9.333 Ti 18 O 54 (0.3≤x ≤ 0.4, 0.1≤y ≤ 0.2) ceramics via A-site modification strategy of Bi/Nd co-substitution. A high dielectric constant of 115 and ultralow loss tangent of 0.003 at 1 kHz are achieved simultaneously in Ba 4 (Sm 1-x-y Bi x Nd y ) 9.333 Ti 18 O 54 ceramics with x = 0.4 and y = 0.2. Incorporating an appropriate amount of Bi 3+ ions contributes to enhancing the dielectric polarizability of the crystal lattice, and greatly strengthening the sintering ability of ceramics as well as local distortion characteristics, leading to an improvement in the dielectric constant and ultimately a deterioration in the loss tangent, which is confirmed by XRD, Raman, SEM and Impedance spectroscopy. The Bi/Nd co-substitution has a significant impact on further improving the dielectric constant, and the compensation of the loss tangent value mainly is derived from the conduction loss with the reduction of leakage currents. Moreover, the high recoverable energy density of 1.2 J/cm 3 and energy efficiency of 87%, as well as excellent temperature (25∼180 °C) and frequency (1∼140 Hz) stability, are obtained in this ceramic owing to high breakdown strength via A-site modification strategy of Bi/Nd co-substitution. These findings establish an effective strategy of Bi/Nd co-substitution to develop highly reliable Ba 4 Sm 9.333 Ti 18 O 54 ceramics, opening a new path for creating next-generation dielectric materials tailored for stable energy storage in high-voltage, low-frequency electronics.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
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IF 9.965
Zhuo Liu,Fei Guo,Lei Cheng,Xiangjie Bo,Tingting Liu,Mian Li
With high prices of precious metals (such as platinum, iridium, and ruthenium) and transition metals (such as cobalt and nickel), the design of high-efficiency and low-cost non-precious-metal-based catalysts using iron (Fe) and manganese (Mn) metals for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are critical for commercial applications of water splitting devices. In the study, without using any template or surfactant, we successfully designed novel cross-linked manganese borate (Mn 3 (BO 3 ) 2 ) and iron carbide (Fe 3 C) embedded into boron (B) and nitrogen (N) co-doped three-dimensional (3D) hierarchically meso /macroporous carbon nanowires (denoted as Fe x Mn y @BN-PCFs). Electrochemical test results showed that the HER and OER catalytic activities of Fe 1 Mn 1 @BN-PCFs were close to those of 20 wt% Pt/C and RuO 2 . For full water splitting, (-) Fe 1 Mn 1 @BN-PCFs||Fe 1 Mn 1 @BN-PCF (+) cell achieved a current density of 10 mA cm −2 at a cell voltage of 1.622 V, which was 14.2 mV larger than that of (-) 20 wt% Pt/C||RuO 2 (+) benchmark. The synergistic effect of 3D hierarchically meso /macroporous architectures, excellent charge transport capacity, and abundant active centers (cross-linked Mn 3 (BO 3 ) 2 /Fe 3 C@BNC, BC 3 , pyridinic-N, M N C, and graphitic-N) enhanced the water splitting catalytic activity of Fe 1 Mn 1 @BN-PCFs. The (-) Fe 1 Mn 1 @BN-PCFs||Fe 1 Mn 1 @BN-PCF (+) cell exhibited excellent stability owing to the superior structural and chemical stabilities of 3D hierarchically porous Fe 1 Mn 1 @BN-PCFs.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yingchen Xu,Chenghan Yang,Qinghua Deng,Yuming Zhou,Chunfeng Mao,Youchao Song,Min Zhu,Yiwei Zhang
It is highly desirable and challenging to design efficient and stable hydrogen evolution reaction (HER) electrocatalysts in a variety of acidic and alkaline media. Here, a novel ternary catalyst has been proposed consisting of ruthenium dioxide doped carbon nanotubes (denoted as RuO 2 @CNT) wrapped in a multi-step strategy with a first synthesis of a bismuth metal porphyrin-based organic framework as co-catalyst (denoted as RuO 2 @CNT@MOF). The addition of CNT improves not only the conductivity of the electrocatalyst but also the distribution of the active RuO 2 particles. Furthermore, the highly symmetrical conjugated structure of Bi-TCPP MOF facilitates both the adsorption of hydrogen ions and the generation of hydroxyl radicals (•OH). The Bi-TCPP MOF encapsulated in the outer layer of RuO 2 @CNT enhances the mechanical strength and creates the confinement effect, leading to the synthesis of RuO 2 @CNT@MOF as a HER electrocatalyst that exhibits excellent catalytic performance and acid and base resistance. In particular, low overpotentials of 13 mV and 50 mV can be achieved to provide current densities of 10 mA cm −2 in alkaline and acidic media, respectively. Significantly, this work provides new ideas for the careful design and development of MOFs as co-catalysts to improve the overall performance of materials in energy-related fields.
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高影响因子
危险品化学品经营许可证（带存储）