TRIBOLOGY TRANSACTIONS
·
2023
·
IF 2.1
Zongxin Qian,Zhiheng Luo,Yinghui Dong,Lulu Yao,Ruhong Song,Yufu Xu
Electroless nickel (EN) coatings have attract much attention due to their ability to provide a corrosion-resistant hard surface. However, the technological advancement demands the development of reinforced coatings with improved tribological performances. In this work, electroless nickel/black phosphorus nanosheets (EN-BP) coatings were prepared by an electroless plating method to provide friction-reducing and antiwear properties for a Q235 carbon steel. The influences of the concentration of black phosphorus and testing conditions on the tribological performances of the coatings were investigated. The results showed that the hardness of the EN-BP coating increased by 48.98% with the introduction of 0.01 g/L BP nanosheets in the plating solution, and the coefficient of friction reduced by 44.5% in pH 8 NaHCO3 solution, respectively, compared with those in pure water. The friction reduction and antiwear mechanism was ascribed to the action roles of the interlayer shear of BP nanosheets and protective lubrication films composed of NiO, Ni(OH)2, SiO2, and PxOy generated on the sliding coating surfaces. The excellent tribological properties of the EN-BP coatings show their promising application prospects in marine industry.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Zhongming Li,Qi Liu,Shan Tang,Dong Feng,Wenbo Zhao,Bin Li,Delong Xie,Yi Mei
It is significant to develop high-efficient fire retardants all the time. Ethylene vinyl acetate (EVA) features flammability and poor fire resistance ability, which severely hindered its extensive application with advanced requirements. Herein, a novel strategy was proposed to combining long chain phosphaphenanthrene grafted MXene (DPP-MXene, also donated as DM) and black phosphorene nanosheets (BP) with EVA to fabricate EVA/DMBP nanocomposites with high fire resistance. Thermogravimetric analysis (TGA) proved that DMBP synergistic system can significantly improve the thermal stability and char forming ability of EVA as proved by delayed thermal decomposition temperatures . The combustion test results suggested that the addition of 3 wt. % DMBP into EVA matrix can induce the EVA/DMBP-3 composites with favorable flame resistance property, the UL-94 V-0 rating and limiting oxygen index (LOI) value (26.7 %) was achieved for the EVA/DMBP-3 components, and significantly decrease in total heat release (THR) (21.5 %) and peak heat release rate (PHRR) (48.1 %) were achieved by addition of 3 wt. % DMBP into EVA elastomer , indicated its incombustible nature. Furthermore, it was found that the incorporation of DMBP synergistic system only yielded the EVA/DMBP-3 composites with slight reduction of the tensile strength and elongation at break as compared to neat EVA. The high efficiency of the prospect flame retardant provided a competitive candidate material for EVA towards wide applications.
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ACS Nano
·
2023
·
IF 17.1
Chendong Zhao,Yuqiang Fang,Hao Chen,Shaoning Zhang,Yingjie Wan,Muhammad Sohail Riaz,Zhuang Zhang,Wujie Dong,Lei Diao,Dayong Ren,Fuqiang Huang
Flexible piezosensing electronic skins (e-skins) have attracted considerable interest owing to their applications in real-time human-health monitoring, human–machine interactions, and soft bionic robot perception. However, the fabrication of piezosensing e-skins with high sensitivity, biological affinity, and good permeability at the same time is challenging. Herein, we designed and synthesized Mo2S3 nanowires by inserting ∞1[Mo2+S] chains between MoS2 interlayers. The resulting Mo2S3 nanowires feature high conductivity (4.9 × 104 S m–1) and a high aspect ratio (∼200). An ultrathin (∼500 nm) Mo2S3 nanowire network was fabricated using a simple liquid/liquid interface self-assembly method, showing high piezoresistive sensitivity (5.65 kPa–1), a considerably low pressure detection limit (0.08 Pa), and gratifying air permeability. Moreover, this nanowire network can be directly attached to human skin for real-time human pulse detection, finger movement monitoring, and sign language recognition, exhibiting excellent potential for health monitoring and human–machine interactions.
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高影响因子
Materials
·
2023
·Vol. 16
·期 7
·2681
·
IF 3.4
Dan Zhou,Zhibo Tong,Hongmei Xie,Jiaotong Sun,Fenggui Chen
To improve the electrochromic (EC) properties of sol–gel-derived WO3films, a series of organic small molecules, such as dopamine (DA), catechol, tyramine, phenol and 2-phenylethylamine, were added into peroxotungstic acid precursor sols as structure-directing additives, and five modified WO3films were prepared by a simple and low-cost complexation-assisted sol–gel method. The effects of the above additives on the EC properties of the modified WO3films have been studied in detail. Compared with the pure WO3polycrystalline film, all the modified films combine the advantages of nanocrystalline and amorphous phases and show higher EC properties attributed to the unique nanocrystal-embedded amorphous structure. The results indicate that different additives with different numbers and types of functional groups (hydroxyl and amino groups) can change the microstructure, morphology, and thus electrochemical and EC properties of the films in various degrees. The additives, in order of their strong interactions with the sols, are DA, catechol, tyramine, phenol and 2-phenylethylamine, primarily depending on the number of hydroxyl groups. Of all the additives, DA with both catechol hydroxyl and amino groups shows the most positive effect; that is, the WO3film modified with DA exhibits the best EC properties in terms of contrast, switching speed, stability, and coloration efficiency.Keywords:tungsten oxide;nanocrystalline;electrochromic property;additive;complexation;sol–gel method;film
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ChemistrySelect
·
2023
·Vol. 8
·期 11
·e202204286
·
IF 2.1
Yating Zeng,Hanping Fu,Liran Liu,Li Feng,Tianxiang Zhang,Qingshuang Liang,Xiufeng Xiao
Graphical A novel 2D/1D/-2D RP/BP-MBWO composed of in situ junction and Z-scheme system has been successfully synthesized. Benefiting from this favourable interfacial and structural characteristics, the fabricated BP/RP-MBWO photocatalyst shows a sharply improved photocatalytic H 2 and H 2 O 2 evolution performance. Exploring multifunctional photocatalysts with rational design and construction of unique transport channels is of great significance for the value-added chemicals production and environmental remediation. In this work, a novel 2D/1D/-2D RP/BP-MBWO dual heterostructure photocatalyst has been successfully synthesized by loading the in-situ grown 2D/1D RP/BP heterostructure on the 2D Bi 2 WO 6 nanosheets. through simple ultrasonic agitation.Benefiting from this favourable interfacial and structural characteristics, the fabricated BP/RP-MBWO photocatalyst shows a sharply improved photocatalytic H 2 and H 2 O 2 evolution performance. Excitingly, the optimal of H 2 O 2 production rate of the BP/RP-Bi 2 WO 6 composites is as high as 622.5 μmol g −1 h −1 under visible light irradiation, which is approximately 15 times as that of pure MBWO. The hydrogen production performance of the complexes was significantly improved compared to the pure MBWO samples. When the BP/RP loading was 20 %, the prepared nanocomposites showed the highest photocatalytic hydrogen evolution efficiency with the hydrogen production rate of about 0.77 μmol ⋅ g −1 ⋅ h −1 . This work is expected to offer a new inspiration for the rational design and construction of effcient photocatalyst systems toward solar energy capture and conversion.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Guorong Wang,Guiquan Liu,Zhiliang Jin
Vanadium-based hydrotalcite materials have attracted much attention in supercapacitor electrodes due to their polyvalent properties. Nevertheless, the weak electrical conductivity of hydrotalcite limits its further development. In order to overcome this problem, nanoflowers P-NiV-LDHs-8 and Se-NiV-LDHs-1 were obtained by ingenious modification on the surface of nanoflower microlamellae of NiV-LDHs. Compared with Se-NiV-LDHs-x (x = 0.5, 2), P-NiV-LDHs-x (x = 4, 12), NiV-LDHs, Ni2P, and NiSe2, nanoflowers P-NiV-LDHs-8 and Se-NiV-LDHs-1 have better mass-specific capacity and corresponding rate performances. The self-assembled P-NiV-LDHs-8//AC and Se-NiV-LDHs-1//AC (AC = activated carbon) soft package devices have relatively superior energy density and power density. Moreover, the specific capacitance retention also maintains a relatively impressive level. It is proven that the interfacial modification has a positive effect on the energy storage performance of NiV-LDHs from the perspectives of phosphating and selenizing.
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Polymers
·
2023
·Vol. 15
·期 7
·1655
·
IF 5
Yongzheng Zhao,Yan Li,Jiaxuan Li,Yifan Xiao,Wenmin Mu,Zhongwei Wang,Liang Song,Jinhong Yu
Few-layer black phosphorus (BP)- and red phosphorus (RP)-modified diglycidyl ether of bisphenol A-based epoxy resins (EP) was prepared with 4,4′-diaminodiphenylsulfone as a curing agent. The thermal stability and flame-retardant properties of the modified EPs were compared. Both BP and RP were able to improve the flame-retardant properties of EPs, while the BP showed higher flame-retardant efficiency than RP. As a two-dimensional nanomaterial, BP exhibited good compatibility, high flame-retardant efficiency, and negligible impact on the mechanical and thermal stability of EP. Pyrolysis-gas Fourier-transform infrared spectroscopic analysis of EP showed that the addition of BP significantly inhibited the release of pyrolysis products in the gas phase. The modes of action for flame-retardant BPs in gas phase and condensed phase were proposed.Keywords:few-layer black phosphorus;flame retardant;epoxy resin
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Na Zhao,Yuhao Zou,Xinzhi Chen,Hairui Weng,Chenyao Wang,Yuanzhi Zhu,Yi Mei
Solid polymer electrolytes attract much attention due to their good flexibility and good interfacial contact property. However, the inherent thermal instability of polymers inhibits the practical application of solid polymer electrolytes . In this work, the black phosphorene nanosheet , a fire-retardant additive, was introduced and incorporated into poly (ethylene oxide) (PEO)-based solid polymer electrolyte to improve the thermal property . The BP/PEO based solid polymer electrolyte membrane is thermally stable, nonflammable, and mechanically strong, more than 400 h of cycling with low polarization based on a Li-Li symmetric cell was achieved. LiFePO 4 //Li solid state battery with the BP/PEO based solid polymer electrolyte shows a high-capacity performance (153 mAh g −1 at 0.1 C) as well as cycling performance (100 cycles at 0.2 C rate) at 60 °C. The flammability tests indicated that a small amount of black phosphorene can make the electrolyte display good non-flammability. In the micro-scale combustion calorimetry test, the peak heat release rate of BP/PEO based solid polymer electrolyte reduced by 62.5% and flame ignition time is slower compared with the PEO based solid polymer electrolyte without incorporating black phosphorene. The present work demonstrated that the black phosphorene nanosheets do not weaken the electrochemical properties of solid polymer electrolytes, but also enhance their thermal properties.
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RESOURCES CONSERVATION AND RECYCLING
·
2022
·
IF 13.716
Yuxiang Zhong,Guanting Liu,Xiao Yang
Natural phosphorus resources are depleting. Phosphorus recovery from waste has become a strategic issue to address the potential threat of phosphorus shortage. Technologies to recycle phosphorus as fertilizers remain in limited applications due to cost and quality reasons. Here, we demonstrate sewage sludge ash as an appropriate resource to prepare elemental phosphorus. By leaching in molten CaCl 2 , PO 4 3- in the ash can be set free and electrochemically split into elemental phosphorus and O 2− . We identify two technical advantages of using sewage sludge ash. Metal cations released from the ash boost the leaching rate of PO 4 3− , while SiO 2 in the ash prevents the accumulation of O 2- in the melt. Electrochemical isolation can keep most impurities in phosphorus within 1.00 ppm, far better than the industrialgrade commercial product. The estimated cost is less than 2 USD (kg-P) −1 . This facile technology may contribute to closing the phosphorus loop for sustainable utilization.
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Materials Today Sustainability
·
2023
·
IF 7.8
Y. He,G. Yue,J. Huo,C. Dong,G. Xie,F. Tan
Transition metal phosphides are becoming a main study topic in new catalytic materials field due to their similar properties to transition metal nitrides and carbides as well as their excellent reaction activity and catalytic selectivity for deep hydrodesulfurization and hydrodenitrogenation . Mxene, a two-dimensional layered material with high specific surface area and electrical conductivity , plays an important role in accelerating catalytic reduction of triiodide ion in dye-sensitized solar cells (DSSCs). In this work, the MoP/MoNiP 2 hybrid was synthesized while adopting Ti 3 C 2 Mxene to realize the intercalation structure of composite with simple conditions, therefore enabling a formation of ‘pillared effect’ in Ti 3 C 2 Mxene. The optimized MoP/MoNiP 2 @Ti 3 C 2 composite was achieved by adjusting the doping ratio of the two. The DSSCs based on the MoP/MoNiP 2 @Ti 3 C 2 catalyst with 80 wt% Ti 3 C 2 doping reache an enhancement of power conversion efficiency of 10.01%, much higher than that of the platinum counter electrode (8.22%). Through a suite of morphological and electrochemical analyses, we summarize the reasons for the performance enhancement to the synergistic effect of the MoP/MoNiP 2 hybrid and Ti 3 C 2 Mxene, and especially, the unique intercalation structure of MoP/MoNiP 2 @Ti 3 C 2 with ‘pillared effect’. The MoP/MoNiP 2 @Ti 3 C 2 counter electrode with perfect electrochemical and photoelectrochemical properties is a promising alternative to the platinum electrode for DSSCs in the future.
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Catalysts
·
2023
·Vol. 13
·期 2
·291
·
IF 3.9
Huancong Shi,Xulei Yao,Shijian Lu,Yuanhui Zuo,Tao Zheng,Liangquan Jia
Sulfamethoxazole is a widely—used antibiotic with high water solubility and low biodegradability, which was considered a refractory environmental pollutant. Hence, a series of functionalized hybrids uniting Cu3P with TiN were prepared. The Cu3P/TiN—x composites remarkably removed the sulfamethoxazole in solution compared with Cu3P and TiN alone. All the as—prepared Cu3P/TiN—x hybrids integrated the advantages of strong adsorption and photocatalysis and achieved removal rates above 70% of sulfamethoxazole. Among the composites, the Cu3P/TiN—2 with a 1:1 molar ratio of Cu: Ti reached a 90% removal rate under dark adsorption for 30 min and subsequent photodegradation for 120 min. The enhanced performance of the Cu3P/TiN—x composites is attributed to the introduced flocculent TiN with a large specific surface area and high conductivity that provide more reactive sites and high electron transferability. Meanwhile, the strong corrosion resistance and chemical stability were also beneficial to the improved performance. Cycling experiments further demonstrate the stability and reliability of the composites. In addition, the capture experiments indicated that the superoxide radical (·O2−) and hydroxyl radical (·OH) played a major role in sulfamethoxazole degradation.Keywords:Cu3P/TiN;plasmonic photocatalyst;sulfamethoxazole;photodegradation
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Meng Liu,Liqian Guan,Yujiao Wen,Lezhu Su,Zhan Hu,Zhengjie Peng,Shikai Li,Qiyuan Tang,Zhi Zhou,Nan Zhou
The current photocatalytic bactericidal materials in the field of food pathogen control are usually consisted of metals that always suffering from poor stability and possible secondary pollution. Besides, the requirement for high energy excitation also inspires the enthusiasm on exploring non-metallic catalysts. Herein, the non-metallic composite of rice shell biochar loaded with red phosphorus (B@RP) was developed for photocatalysis and photothermal removal of bacteria. The B@RP showed effective photocatalysis performance to stimulate the generation of OH and O 2 − free radicals for the elimination of Escherichia coli ( E. coli ). At the same time, the photothermal effect of B@RP can also increase the permeability of cell membrane, which is conducive to free radicals entering the cell interior. Therefore, the non-metallic composite could achieve complete removal of E. coli within 2 h under illumination. Meanwhile, B@RP had excellent stability and the sterilization efficiency maintained 100% after 9 cycles. Hence, B@RP is expected to be a harmless and efficient bactericidal material for food industry.
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