COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Yun-Xi Jiang,Shu-Fei Yin,You-Lin Zhang,Pan Liu,Hao Li,Lian-Kui Wu,Fa-He Cao
Conventional epoxy coatings rely primarily on passive barrier effects and therefore lack the ability to regulate interfacial corrosion processes after local damage. Here, a physicochemically regulated active/passive epoxy coating is developed by incorporating a phytic acid–loaded cerium-based metal–organic framework (CeMOF-P) as a functional colloidal additive. Owing to the confinement and coordination effects of the CeMOF framework, phytic acid is stably immobilized and uniformly dispersed, resulting in improved coating compactness and interfacial adhesion. Electrochemical impedance spectroscopy shows that the CeMOF-P–modified coating exhibits markedly enhanced corrosion resistance and, more importantly, a characteristic non-monotonic impedance evolution with pronounced impedance recovery upon damage, indicating an interfacial regulation mechanism beyond passive shielding. Mechanistic analyses reveal that corrosion-triggered, coordinated release of Ce 3+ /Ce 4+ species and phytic acid leads to the in situ formation of a compact cerium–phosphate–rich interfacial film, which simultaneously suppresses anodic dissolution and cathodic reactions. These results demonstrate that Ce–P synergy enables continuous interfacial regulation rather than transient passivation, providing mechanistic insight into the role of coordination chemistry and colloidal confinement in governing interfacial electrochemical behavior and stability in protective coating systems.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Qingshan Zhao,Xiaojie Tan,Tengfei Liu,Shuai Hou,Wanxin Ni,Hao Huang,Jinqiang Zhang,Zhongxue Yang,Dawei Li,Han Hu,Mingbo Wu
Heteroatom-doped carbon materials have been regarded as sustainable alternatives to the noble-metal catalysts for oxygen reduction reaction (ORR), while the catalytic performances still remain unsatisfactory. Herein, we develop a metal-free adjacent N, P and S-codoped hierarchical porous carbon nanoshells (NPS-HPCNs) through a novel layer-by-layer template coating method. The NPS-HPCNs is rationally fabricated by crosslinking of polyethyenemine (PEI) and phytic acid (PA) on nano-SiO 2 template surface and subsequently coating of viscous sulfur-bearing petroleum pitch, followed by pyrolysis and alkaline etching. Soft X-ray absorption near-edge spectroscopy (XANES) analysis and density functional theory (DFT) calculations prove the engineering of adjacent N, P and S atoms to generate synergistic and reinforced active sites for oxygen electrocatalysis. The NPS-HPCNs manifests excellent ORR activity with a half-wave potential (E 1/2 ) of 0.86 V, as well as promoted durability and methanol tolerance in alkaline medium. Remarkably, the NPS-HPCNs-based Zn-air battery delivers an open-circuit voltage of 1.479 V, a considerable peak power density of 206 mW cm −2 and robust cycling stability (over 200 h), even exceeding the commercial Pt/C catalyst. This study offers fundamental insights into the construction and synergistic mechanism of adjacent heteroatoms on carbon substrate, providing advanced metal-free electrocatalysts for Zn-air batteries and other energy conversion and storage devices.
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高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 18
·3049-3059
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IF 2.909
Ma Chang,Xu Chengcheng,Meng Qingfang,Yang Haili,Xie Rui,Zhang Huiping,Tu Haoyu,Zhao Yueqiang,Wang Mingyan,Xu Guoxiang,Zhu Jing
In this paper, with cellulose microsphere as the substrate, a polyaniline/cellulose composite was prepared by means of in situ polymerization in supercritical CO 2 (SCCO 2 ) environment, and the effect of experimental pressure, temperature, and reaction time on the morphology and electrochemical properties of the composite were explored. In addition, the electrochemical properties of the composite were compared with the one prepared under normal temperature and pressure condition (NPT). The results show that the polymerization time of aniline in SCCO 2 is greatly shortened comparing with chemical oxidation of 6 h, and the capacitance of the composite prepared in SCCO 2 can reach 391 F·g −1 at the scanning rate of 5 mV·s −1 , which is higher than 286 F·g −1 under NPT. After 300 charge–discharge cycles, the capacitance retention of the composite prepared in SCCO 2 and NPT are 91% and 83%, respectively. The stability of the composite material prepared in SCCO 2 is significantly improved. Graphical abstract
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ACS Omega
·
2022
·
IF 4.132
Yudou Wang,Xu Zhu,Minghui Gao,Bo Zhang,Lei Zhu
The deposition of wax on the surface of the pipeline or the facilities is harmful to oil industries, which can cause serious safety problems and economic loss. To address this problem, a degradable glutinous rice/chitosan-phytic acid composite coating (GR/CS-PA) was prepared. The GR can serve as an adhesive, and it can also enhance the flexibility of CS-PA. The CS-PA component can be used to retain water to prevent the adhesion of crude oil and enhance the mechanical properties of the antiwaxing layer. With the hydration layer on the surface of the GR/CS-PA coating, which can prevent contact between the pollutants and the GR/CS-PA, the coating possesses excellent antifouling properties, especially excellent antiwaxing performance. In addition, an antiwaxing performance testing method was established to quantificationally evaluate the antiwaxing performance of the coating, and the antiwaxing performance (AWP) value was proposed to be the criterion of the antiwaxing performance of the coating. We hope that the green coating and the quantitative testing method can be applied in the petroleum industry to solve the wax deposition problem.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Duo Yang,Miaomiao Chen,Jing-He Yang
Phytic acid (PA) is a six-fold dihydrogenphosphate ester of inositol with cost-effective, environmentally friendly, and safe properties. Here, we successfully synthesize the dehydroxyl cobalt phytate (PA-Co-400) using PA as phosphorus sources by a one-pot wet-chemistry strategy to prepare the precursor PA-Co and then heat treatment at 400 °C under an N 2 atmosphere for dehydroxylation. The average diameter, specific surface area, surface element distribution, and catalytic activity of the catalyst are significantly affected by dehydroxylation temperature. The specific surface area increases first and then decreases with the treatment temperature from 200 °C to 600 °C. The SEM results indicate that the average diameter of PA-Co-400 particle is 68.90 nm. The as-prepared samples are used as an anode catalyst for electrocatalytic oxygen evolution reaction (OER). The PA-Co-400 exhibits splendid OER performances with an overpotential of 310.31 mV at j 10 (η 50 = 349.35 mV, η 100 = 367.20 mV), which are even comparable to commercial RuO 2 (η 10 = 310.54 mV, η 50 = 389.80 mV, η 100 = 450.60 mV). Moreover, the PA-Co-400 has a small Tafel slope of 53.27 mV dec −1 , which is lower than commercial RuO 2 (81.71 mV dec −1 ). The ultra-long durability of PA-Co-400 was tested for over 80 h at current densities of 10 mA cm −2 without a significant reduction in 1 M KOH.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Hui Peng,Xin Wang,Zhiyuan Liu,Haikuo Lei,Shuzhen Cui,Xuan Xie,Yangfei Hu,Guofu Ma
Zn ion capacitors (ZICs) composed of a carbon-based cathode and a Zn anode are one of the most promising energy storage devices due to their inherent safety and high-power output. However, their poor cycling stability originating from the Zn dendrites’ formation and low energy density limited by insufficient activated carbon properties remain major challenges for development of high-performance ZICs. Hence, we constructed a facile and effective strategy to alleviate “edge effects” and suppress Zn dendrites by growing ZnO nanowire arrays on Zn foil (ZnO@Zn) using a horizontally potentiostatic anodizing technique. The electrochemical characterizations and in situ optical microscopy observation revealed that the introduction of ZnO nanowire arrays can significantly suppress the growth of Zn dendrites and enhance the cycling stability of the Zn anode. The superfine and interlaced ZnO nanowire arrays provide uniform nucleation sites and high electrical conductivity for the Zn metal anode, reducing the local current density and promoting the rapid diffusion and migration of Zn ions on the Zn anode surface. As a result, the ZnO@Zn electrode has a very low nucleation overpotential and excellent cycle stability, far superior to the bare Zn anode. Furthermore, a ZnO@Zn//NPHC ZIC assembled with an N, P-codoped hard carbon (NPHC) cathode delivers a high specific capacity of 110.3 mAh g–1 at 0.1 A g–1 and achieves outstanding cycling stability with 90% capacity retention together with ∼100% Coulombic efficiency after 20000 cycles.
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高影响因子
JOURNAL OF DAIRY SCIENCE
·
2023
·
IF 3.5
Pin Chen,Ru-Meng Wang,Bao-Cai Xu,Fei-Ran Xu,Ying-Wang Ye,Bao Zhang
ABSTRACT Green hydrophobically modified butyrylated dextrin (BD) was used to modulate casein (CN). The CN/BD complex nanoparticles were formed at different CN-to-BD mass ratios based on a pH-driven technology. The interaction force, stability, and emulsifying properties of complex nanoparticles were investigated. The nanoparticles had a negative charge and a small particle size (160.03, 152.6, 155.9, 206.13, and 231.67 nm) as well as excellent thermal stability and environmental stability (pH 4.5, 5.5, 6.6, 7.5, 8.5, and 9.5; ionic strength, 50, 100, 200, and 500 m M ). Transmission electron microscopy demonstrated the successful preparation of complex nanoparticles and their spherical shape. Fourier transform infrared spectroscopy, fluorescence spectroscopy, and dissociation analysis results showed that the main driving forces of formed CN/BD nanoparticles were hydrogen bonding and hydrophobic interaction. Furthermore, the CN/BD nanoparticles (CN/BD mass ratio, 1:1; weight/weight) exhibited the lowest creaming index, and optical microscopy showed that it has the most evenly dispersed droplets after 7 d of storage, which indicates that the CN/BD nanoparticles had excellent emulsifying properties. Butyrylated dextrin forms complex nanoparticles with CN through hydrogen bonding and hydrophobic interaction to endow CN with superior properties. The results showed that it is possible to use pH-driven technology to form protein–polysaccharide complex nanoparticles, which provides some information on the development of novel food emulsifiers based on protein–polysaccharide nanoparticles. The study provided significant information on the improvement of CN properties and the development of emulsions based on CN.
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高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Han Wang,Lu Chen,Shuang Wu,Weiping Jin,Wangyang Shen,Zhongze Hu,Wenjing Huang,Gang Liu
Rice bran oil bodies (RBOBs) are one of the most exploited functional components from rice bran by-products and are predominantly based on oleosin stabilization. In this study, we explored the effects of different concentrations of added (-)-epicatechin, ferulic acid, and phytic acid on the RBOBs stability. The results revealed that the incorporation of all three natural phytoconstituents could reduce the RBOBs particle size and increase emulsifying properties, demonstrating increasing surface hydrophobicity (p < 0.05), and a good antioxidant effect, which was especially obvious with (-)-epicatechin incorporation. Fourier transform infrared (FT-IR) spectroscopy data demonstrated that these three small molecule substance classes can modify with oleosin on RBOBs surface by covalent and noncovalent effects. Raman spectroscopic analysis illustrated that the vibrational modes of disulphide bonds in oleosin were modified by these three plant natural ingredients. The interactions between the three phytoconstituents and the model protein were investigated by molecular docking experiments.
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高影响因子
Polymers
·
2022
·Vol. 14
·期 23
·5269
·
IF 4.967
Wei Ling,Xiongwei Wu,Funian Mo
With the advantages of benign mechanical property, electrochemical stability, and low cost, graphite fibers (GFs) have been widely used as electrodes for vanadium redox flow batteries (VRFBs). However, GFs usually possess inferior electrochemical activity and ion diffusion kinetics for electrode reaction, vastly limiting their application in VRFBs. Here, a 3D carbon nanonetwork coated GFs with multi-heteroatom doping was constructed for application in VRFBs via low temperature polymerization between linear polymer monomer and phytic acid, and subsequent carbonization (900 °C) on the GFs (GF@PCNs-900). Benefiting from the 3D structural features and multi-heteroatom doping (O, N and P), the composite electrode displayed sufficient diffusion of vanadium ions, rapid electron conduction, and highly enhanced electrochemical activity of reactive site on the electrodes. As a result, the GF@PCNs-900 delivered a high discharge capacity of 21 Ah L−1and energy efficiency of above 70% with extraordinary stability during 200 cycles at 200 mA cm−2. Even at a huge current density of 400 mA cm−2, the GF@PCNs-900 still maintained a discharge capacity of 5.0 Ah L−1, indicating an excellent rate of performance for VRFBs. Such design strategy opens up a clear view for further development of energy storage field.Keywords:graphite fibers electrodes;3D nanonetwork;multi-heteroatom doping;high-rate property;vanadium redox flow batteries
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高影响因子
ENERGY
·
2022
·
IF 8.857
Hanbing Duan,Wenye Zhang,Zhongyuan Guo,Xiaoxiang Su,Yongcun Liu,Hao Meng,Xiang Yu,Gang Qin,Qiang Chen,Jia Yang
Flexible supercapacitor has been proved a promising candidate for wearable electronics due to its high power density, fast charge/discharge rates and long life cycle. Gel polymer electrolyte (GPE), an important component of supercapacitor, combines high ionic conductivity of liquid electrolyte and great safety of solid electrolyte. To satisfy the practical application of wearable flexible devices, the GPE should possess outstanding mechanical properties. Herein, a fully physical cross-linked polyacrylamide/κ-carrageenan double network GPE is prepared, in which κ-carrageenan with double-helix structure is used as the first network and polyacrylamide acts as the second network. The double network GPE shows outstanding mechanical properties, including high tensile strength (0.33 MPa), elongation (1143%) and preeminent self-recovery performance. Moreover, owing to thermoreversible characteristic of κ-carrageenan and reversible hydrogen bonds, the GPE exhibits excellent self-healing performance. Furtherly, an integrated supercapacitor is fabricated by in-situ growing polyaniline on the GPE surface. Different from conventional sandwich-like structure of supercapacitor, this seamless connection between electrode and electrolyte layers can significantly lower interfacial resistance , and avoid displacement and separation under deformations. Meanwhile, this supercapacitor also demonstrates splendid self-healing performance and high adaptability during harsh conditions. This flexible self-healing supercapacitor with superior security has broad application prospects in portable and wearable electronics.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Yichen Tian,Chuyi Wang,Yuanfang Ai,Longcheng Tang,Kun Cao
Phytic acid-based phosphate esters (PAPEGs) were prepared through the reaction between phytic acid (PA) and different proportions of polyethylene glycol 200 (PEG-200). Intumescent flame-retardant coating (IFRC) with PAPEG3, PAPEG6, PAPEG9 and PAPEG12 were obtained via thermal curing of PAPEGs and melamine formaldehyde resin (MFR), respectively. The backside temperature of steel with MFR/PAPEGs coating was much lower than that of MFR/PA coating. MFR/PAPEG6 coating showed the best flame retardancy, and the char thickness reached 48 mm from initial thickness of 0.4 mm, and the expansion ratio was 120 times. Cone calorimeter confirmed that the incorporation of PAPEG6 could minimize the heat release rates and total heat release of materials during combustion. Moreover, the MFR/PAPEGs coating possessed both excellent transparency and water resistance. The transmittance of MFR/PAPEG6 and MFR/PAPEG9 was above 87% at 600 nm, and transmittance of MFR/PAPEG12 even reached 90%. The proposed flame-retardant mechanism was that MFR/PAPEGs produced phosphorus-containing acids to dehydrate and carbonize PEG, leading to the formation of graphitized chars. Meanwhile, the nitrogen-containing intermediates simultaneously released noncombustible gases to expand the char and interrupt the combustion reaction.
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Energy Technology
·
2023
·Vol. 11
·期 6
·2201358
·
IF 3.8
Ganghong Zhang,Xiaotian Wu,Tianlong Du,Yu Wang,Zhengying Liu,Wei Yang,Mingbo Yang
The challenge to prepare conductive hydrogel electrodes for stretchable supercapacitors with high areal capacitance and excellent stability during stretching has attracted tremendous attention from researchers. Herein, a method to enhance the performance of a conductive hydrogel electrode is reported. The in situ oxidative polymerization of aniline monomer is performed in the prestretched polyacrylamide (PAAm) hydrogel. After releasing the hydrogel, the polyaniline (PANI) nanoparticles can shrink with the PAAm substrate to form a dense and continuous conductive network. Due to the enhanced conductive networks, the prestretched PAAm-PANI conductive hydrogel with prestrain of 500% (PPCH 5 ) electrode shows high areal capacitance of 509.9 mF cm −2 at 0.5 mA cm −2 . The symmetrical stretchable supercapacitor based on PPCH 5 electrodes exhibits a high areal capacitance of 219.7 mF cm −2 . The device shows high capacitance retention of 68.5% even when stretched to 200% strain and noncapacitance decays after 2000 stretching cycles at 100% strain. This strategy can be expanded to the carbon nanotubes (CNT)-filled hydrogel systems. The PAAm-PANI-CNT conductive hydrogel with prestrain of 500%-based supercapacitor shows specific capacitance of 1429.87 mF cm −2 . The results demonstrate that prestretching is a highly effective method to enhance capacitance and stretching stability of PANI hydrogel electrode for stretchable supercapacitors.
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