Nano Research
·
2021
·Vol. 15
·期 3
·2013-2022
·
IF 8.897
Zhang Jining,Lei Yifan,Cao Shuang,Hu Wenping,Piao Lingyu,Chen Xiaobo
Photocatalytic water splitting (PWS) has attracted widespread attention as a sustainable method for converting solar to green hydrogen energy. So far PWS research has mainly focused on the development of artificial photocatalytic hydrogen production systems for pure water. It is more practically attractive to create systems for seawater, i.e., to reduce the cost of hydrogen production and make better use of naturally occurring water resources. Herein, brookite, anatase, and rutile TiO 2 nanoparticles are investigated as photocatalysts to explore the feasibility of such thought and have shown attractive hydrogen production performance under full solar spectrum without any sacrificial agent. It is worth noting that, brookite TiO 2 , has more suitable band gap position and excellent photoelectric properties compared with anatase and rutile TiO 2 , and has higher efficiency and stability in the process of hydrogen production. The photocatalytic hydrogen production rate of brookite TiO 2 can reach up to 1,476 µmol/g/h, the highest value reported for TiO 2 -based systems and most other photocatalysts in seawater splitting under full spectrum. As the Cl − ions in seawater go through a cycle of oxidation and reduction, no Cl 2 is detected in the solar hydrogen production from seawater.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 13
·3999-4009
·
IF 4.478
Zhang Liule,Gao Xia,Chen Xiying,Zhao Minyang,Wu Haotian,Liu Yaqing
In view of the high toxicity and widespread availability, it is of great importance to develop accurate, sensitive, and convenient assays for fluoride ion (F − ) detection. Herein, a ratiometric fluorescent system is established for point-of-care testing (POCT) of F − with a smartphone as analyzer. The sensing system of calcein-QDs-Eu 3+ contains two fluorescent probes of calcein (green emission) and ZnCdSe/ZnS QDs (red emission). The sensing system only presents red emission in that the calcein emission is quenched due to the combination between calcein and Eu 3+ . When F − is introduced, the fluorescence of calcein is recovered due to the stronger interaction between F − and Eu 3+ , which changes the emission from red to green. The ratiometric strategy offers an obvious fluorescence color change of the system, which eliminates interference and improves the detection accuracy. Specifically, the sensing system has excellent selectivity in that Eu 3+ is more inclined to bind with F − rather than other anions. The developed assay was further used to prepare a test paper and hydrogel for POCT. To further improve the detection sensitivity and realize quantitative analysis, a smartphone installed with a color scan app is integrated as signal reader and analyzer, which is used for POCT of F − in real samples, showing great application potential in environmental protection and food safety evaluation. Graphical abstract
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 2
·280-285
·
IF 1.307
Chen Yawei,Wang Shiyang,Jie Yulin,Lei Zhanwu,Cao Ruiguo,Jiao Shuhong
Sodium ion batteries(SIBs) are promising energy storage devices for smart grid applications due to their low cost and the high abundance of sodium, but few cathode materials of SIBs with high energy density are available for practical applications. Herein, a series of NaNCM ternary materials(NCM=nickel-cobalt-manganese) is obtained by solid- phase reaction with well-regulated temperature and other reaction conditions. XRD results show that impure NiO phase is more likely to occur under high nickel content. The cross-section SEM indicates that the primary particles in the electrode materials are radially distributed along the radial direction, and the internal porous structure is conducive to the infiltration of electrolyte. The initial specific capacities of Na[Ni 0.68 Co 0.10 Mn 0.22 ]O 2 (NaNCM712), Na[Ni 0.6 Co 0.2 Mn 0.2 ]O 2 (NaNCM622) and Na[Ni 0.4 Co 0.3 Mn 0.3 ]O 2 (NaNCM433) at 0.2 C are 165.5, 153.1 and 146.8 mA·h/g, and the corresponding capacity retention rates are 63.2%, 78.5% and 71.7% after 100 cycles. NaNCM712 possesses the highest initial specific capacity, and NaNCM433 delivers the best rate capability. The rate capabilities of high-nickel and low-cobalt NaNCM cathodes need to be further improved. Moreover, ex-situ XRD pattern reveals the structure evolution (from O3 type to P2 type) during a long cycling charge and discharge process.
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高影响因子
JOURNAL OF FORESTRY RESEARCH
·
2020
·Vol. 32
·期 4
·1779-1787
·
IF 1.689
Cai Hangchuan,Wang Zhiqi,Xie Di,Zhao Panpan,Sun Jianping,Qin Daoyu,Cheng Fangchao
Transparent wood has potential application in intelligent building, solar cell, electronics, and other advanced materials, while its single functionability hinders its further development. Flexible transparent wood (FTW) was prepared by alkaline pretreatment and bleaching treatment of paulownia wood followed by impregnation of epoxy resin and ethylene glycol diglycidyl ether (EDGE). The effect of delignification degree on the optical and mechanical properties of FTW was studied, and the influence of the epoxy/EDGE ratio on the flexibility and mechanical properties of FTW was also investigated. The results showed that higher delignification degree resulted in higher transmittance of FTW. More EDGE addition led to better flexibility of FTW, while overmuch addition of EDGE will reduce the mechanical properties. The optimal FTW sample resulted in a high transmittance of 89% and an ultrahigh haze value of 97% with outstanding flexibility and excellent mechanical properties. The investigation of FTW broadens the research field of transparent wood, and provides great possibility for its application in flexible wearable devices and flexible materials.
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高影响因子
Frontiers of Materials Science
·
2024
·Vol. 18
·期 1
·1-11
·
IF 2.5
Lan Weiwei,Wang Mingbo,Lv Zhenjun,Li Jun,Chen Fuying,Liang Ziwei,Huang Di,Wei Xiaochun,Chen Weiyi
In the field of bone defect repair, critical requirements for favorable cytocompatibility and optimal mechanical properties have propelled research efforts towards the development of composite materials. In this study, carbon nanotubes/polylactic acid/hydroxyapatite (CNTs/PLA/HA) scaffolds with different contents (0.5, 1, 1.5 and 2 wt.%) of CNTs were prepared by the thermally induced phase separation (TIPS) method. The results revealed that the composite scaffolds had uniform pores with high porosities over 68% and high through performances. The addition of CNTs significantly enhanced the mechanical properties of resulted PLA/HA, in which the 1.5 wt.% CNTs/PLA/HA composite scaffold demonstrated the optimum mechanical behaviors with the bending elastic modulus of (868.5 ± 12.34) MPa, the tensile elastic modulus of (209.51 ± 12.73) MPa, and the tensile strength of (3.26 ± 0.61) MPa. Furthermore, L929 cells on the 1.5 wt.% CNTs/PLA/HA scaffold displayed good spreading performance and favorable cytocompatibility. Therefore, it is expected that the 1.5 wt.% CNTs/PLA/HA scaffold has potential applications in bone tissue engineering.
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高影响因子
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
·
2024
·Vol. 60
·期 2
·309-314
·
IF 0.6
Liu Tianyu,Ye Zhongbin,Liu Dong
Utilizing emulsion polymerization, a microcapsule breaker with a polystyrene-polyacrylamide core-shell structure was synthesized. Ammonium persulfate served as the breaker, polystyrene as the shell, and polyacrylamide as the drug-carrying agent. The results demonstrated that the synthesized microencapsulated gel-breaker exhibited a uniform spherical shape, superior water dispersion, and enhanced thermal stability. Conductivity tests indicated that the core-shell structure of the microcapsules effectively regulated the release of ammonium persulfate as a gel-breaking agent, resulting in delayed polymer gel-breaking.
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高影响因子
IONICS
·
2022
·Vol. 28
·期 7
·3197-3205
·
IF 2.961
Hei Peng,Zhao Yabin,Luo Shanshan,Gao Faming
In recent years, 2D intercalated pseudocapacitance MoO 3 and Nb 2 O 5 have been widely investigated, while 3D Mo-Nb–O materials have rarely been discussed. Here, we synthesized Mo 3 Nb 2 O 14 -B by a simple ball-milling method and further prepared Mo 3 Nb 2 O 14 -L with advanced energy storage properties by a solvothermal method, where the abundant nanopore channels and in situ carbon encapsulation led to fast Li-ion diffusion and excellent structural stability. It performs well in half-cell performance tests, including high reversible capacity (461 mAh g −1 at 0.1C), initial coulomb efficiency of 88.4%, excellent cycling performance (4.4% capacity loss in 600 cycles at 10 C), and significant intercalation mimetic capacitive contribution (89.2% at 1.0 mV s). All these advantages indicate that Mo 3 Nb 2 O 14 -L has great potential for use as anode material for lithium-ion batteries. Graphical abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 47
·17829-17842
·
IF 4.5
Tan Liming,Zhang Jianbo,Shen Jun
New thermal interface materials (TIM) with liquid metal (LM) as the main component show many advantages in the field of thermal management. However, it is prone to leakage and causes electronic components to fail due to its fluidity, corrosiveness and difficulty in adsorption, thus limiting its applications. In this paper, based on the high thermal conductivity of LM, the composite material made of eutectic gallium indium alloy (EGaIn) and nickel-plated copper mesh (NPCM) was prepared, and the TIM with high thermal conductivity, stability and reliability was obtained. With surface plating, the plating on the copper surface achieves an area coverage of up to 97.7%, effectively preventing EGaIn corrosion. The complete wetting between materials can be achieved through surface modification of NPCM with an EGaIn oxide layer. The surface modification of NPCM with EGaIn oxide layer can achieve complete wetting between materials. The thermal conductivity of the composite is 26.4 W m −1 K −1 . Compared to Nickel foams (NiF), NPCM/EGaIn composite exhibits a 22.4% increase in thermal conductivity. In addition, its thermal conductivity fluctuates in a range below 7 percent even after undergoing high-temperature aging and low-temperature cycling. The actual load test demonstrated that the use of EGaIn/NPCM resulted in an 18.0% reduction in CPU full load temperature and a 78.0% decrease in maximum throttling peak, as compared to conventional silicone grease.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 22
·9196-9209
·
IF 4.5
Tang Zhen-xiao,Yi Mao-zhong,Zhou Yuan-ming,Liu Rui-zhi,Peng Ke
A three-dimensional orthogonal woven C/C-SiC composite was successfully prepared by high-solid-loading slurry impregnation combined with precursor infiltration and pyrolysis. The microstructure, mechanical properties and ablation behavior of the C/C-SiC composite were investigated. The slurry impregnation and the precursor infiltration and pyrolysis acted as fast filling and supplementary densification, respectively. Based on a three-dimensional orthogonal woven C/C preform, the C/C-SiC composite had excellent mechanical properties with bending strength and fracture toughness of 364.46 and 22.86 MPa·m 1/2 . The mass and linear ablation rates of the C/C-SiC composite were 3.21 mg/s and 4.93 μm/s, respectively, after ablation under an oxyacetylene flame for 300 s. The good ablation performance was attributed to the passive oxidation of SiC at high temperature and high oxygen partial pressure, and the pitting caused by SiO 2 accelerated the failure of carbon fibers.
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高影响因子
Science China-Materials
·
2024
·Vol. 67
·期 3
·954-964
·
IF 6.8
Chen Jiayue,Cao Meilian,Yue Yiying
The high-value utilization of lignin meets the demand for the reclamation of wastes and is of great significance for achieving carbon neutrality. However, lignin is unstable and prone to melting and deformation at high temperatures, requiring a long period of stabilization. The carbon nanofiber (CNF) membrane prepared by electrospinning has advantages such as high aspect ratio, low density, good light absorption, and a large number of pores favorable for steam transportation. Based on co-electrospinning, a lignin-based CNF membrane material was prepared in this work. The preparation process of this material can not only save the stabilization time of lignin-based nanofibers but also improves the hydrophilicity and light absorbance of the membrane through zinc chloride activation and the addition of pore-forming agents (terephthalic acid and polymethyl methacrylate). As a photothermal layer of an interfacial solar evaporation system, the membrane has a light absorption of 94.3% over the whole sun spectrum. Furthermore, the interfacial solar evaporation system with the prepared CNF membrane as the photothermal layer has an evaporation rate of 1.43 kg m −2 h −1 under one sun, with an evaporation efficiency of 93.8%. In addition, the evaporator has good circulation and salt resistance ability. After 15 h of continuous illumination, it still maintains excellent evaporation rate. This type of CNF membrane with lignin as the main carbon source has great potential as a photothermal conversion material in future desalination applications.
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高影响因子
Nano Research
·
2023
·Vol. 17
·期 4
·3120-3129
·
IF 9.9
Hu Lulin,Yu Xinxin,Hao Jingcheng,Xu Lu
Owing to their low flexibility, poor processability and a lack of responsiveness, inorganic materials are usually non-ideal for constructing a living organism. Hence, to date, lifelike materials with structural hierarchies and adaptive properties usually rely on light and soft organic molecules, although few exceptions have been acquired using two-dimensional (2D) inorganic nanosheets. Herein, with a systematic study on the gelation behavior of carbon-based 0D quantum dots, 1D nanotubes, and 3D fullerenes, we find that acidified 1D carbon nanotubes (CNTs) can serve as an alternative building block for fabricating purely inorganic biomimetic soft materials. The as-prepared CNT gels exhibit not only a pH- or photothermal-triggered mechanical and tribological adaptivity, which allows them to simulate the behavior of sea cucumbers, peacock mantis shrimps, and mammalian muscles or cortical bones, but also a unique damping property that is similar to spider’s cuticular pad. Their high elasticity, effective lubrication, excellent biocompatibility, and controllable friction and wear also allow them to function as a new type of smart lubricants, whose tribological properties can be regulated either by its internal pH changes or spatiotemporally by near-infrared (NIR) light irradiations, free of any toxic and flammable base oils or additives.
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高影响因子
Science China-Technological Sciences
·
2022
·Vol. 65
·期 8
·1772-1779
·
IF 3.903
Li Cong,Tan Dan,Luo Cheng,Luo JunHui,Cao Ke,Yang Li,Zhou YiChun
Toughness enhancement of zirconium tantalum ceramics is conducive to the new generation of thermal barrier coatings (TBCs). The phase transformation toughening mechanism of zirconium tantalum ceramics has been explored through the Vickers indentation of YTaO 4 ceramic block, the phase transformation region is found near the indentation and the microcrack tip. The increased energy of stable phase Δ E M−M′ >0, and the volume expanded Δ V ≈1.9%, so, the phase transformation is a process of energy absorption. The additional stress α a restraining the crack propagation was generated in the shielding area at the crack tip. In addition, combined with the toughening of ferroelastic domains switch, the traditional microcrack toughening, and crack propagation toughening, we summarized the toughening mechanism of YTaO 4 ceramics with the increasing external load, which is followed by ferroelastic toughening, phase transformation, microcrack, and crack propagation. For the perspective of toughening, we found that Z 4+ doping in YTaO 4 ceramics could broaden the phase transformation range in phase transformation toughening, significantly improve the toughness and reduce the generation of cracks in microcrack toughening and crack propagation toughening. Therefore, toughening mechanism of zirconium tantalum ceramics has important guiding significance for the service of TBCs.
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高影响因子
危险品化学品经营许可证（带存储）