IONICS
·
2017
·Vol. 23
·期 11
·3211-3218
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IF 2.062
Xu Guiyun,Liang Shaoping,Zhang Mingming,Fan Jinshi,Feng Jiuju,Yu Xijuan
Carboxylated cellulose nanocrystals (CNCC) were synthesized by treating microcrystalline cellulose with ammonium persulfate. Silver nanoparticles (AgNPs) were prepared on the surface of CNCC using NaBH 4 as reductant. Novel conducting nanocomposites of poly(3,4-ethylenedioxythiophene) (PEDOT) doped with AgNPs/CNCC were electrodeposited on the surface of the glassy carbon electrode. The nanocomposites prepared in various ratios of PEDOT, CNCC, and AgNPs were characterized by scanning electron microscopy, transmission electron microscope, electrochemical impedance spectroscopy, cyclic voltammetry, and differential pulse voltammetry. The prepared PEDOT/AgNPs/CNCC showed much low electrochemical impedance and very good response towards the oxidation of dopamine. Based on these findings, a highly stable, sensitive, and selective amperometric sensor for the detection of dopamine was developed. Operated at 0.20 V (vs. Ag/AgCl), the sensor can detect dopamine in the range of 0.05 to 782 μM with a 17-nM detection limit.
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高影响因子
JOURNAL OF POROUS MATERIALS
·
2017
·Vol. 24
·期 6
·1565-1574
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IF 1.624
Jiao Yuchun,Xu Li,Sun Huiling,Deng Yijie,Zhang Tao,Liu Guoji
In this work, nitrogen-doped mesoporous carbon spheres (NMCS) were synthesized through a hard template method by using benzoxazine resin as precursor and ordered mesoporous silica spheres as template. The obtained N-doped mesoporous carbons were amorphous spherical nanoparticles with worm-like mesoporous channels and possessed high surface area of 789 m 2 /g, large pore volume of 0.49 cm 3 /g and high nitrogen content of 3.50 wt.%. The adsorption capacity of methyl orange (MO) by NMCS could attain 352.1 mg/g at an optimal condition, while the adsorption capacity of MO by non-doped mesoporous carbon spheres (MCS) was 251.9 mg/g at the same condition. The adsorption process fitted the pseudo-second-order kinetic model and the Langmuir isotherm well. Thermodynamic analysis indicated that the removal of MO by NMCS was spontaneous, endothermic and feasible process. In addition, the adsorption capacity of regenerated adsorbent was 89.04% of the initial level after four regeneration cycles.
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Scientific Reports
·
2025
·Vol. 15
·期 1
·1-14
·
IF 3.9
Wei Aijia,Yang Yuqi,Mu Jinping,He Rui,Li Xiaohui,Zhang Haipeng,Liu Zhenfa,Wang Shasha,Zheng Yong,Mei Shuxing
The instability of the electrode/electrolyte interface and the metal-ions dissolution of high-voltage LiNi 0.5 Mn 1.5 O 4 (LNMO) material lead to significant degradation of cycling performance, thereby limiting the large-scale application of LNMO-based batteries. Here, inorganic Mg/Ca/Sr-contained phosphates (MgHPO 4 , CaHPO 4 , and SrHPO 4 ) are used individually as functional additives of standard electrolytes to enhance the cycling performance of LNMO. Combined with theoretical calculations, a series of electrochemical measurements and characteristics corroborate that the MgHPO 4 is the optimal additive and can preferentially undergo oxidation and reduction decomposition over carbonate solvents. Electrochemical results reveal that the LNMO/Li half-cell containing the MgHPO 4 additive shows a capacity retention of 91.9% after 500 cycles at 5 C, higher than that obtained with STD (76.5%). In addition, the LNMO/graphite (Gr) full-cell with MgHPO 4 additive increases the capacity retention from 70.8 to 78.0% after 100 cycles at 0.5 C. The addition of MgHPO 4 allows a thin, uniform, and conductive cathode-electrolyte interphase (CEI) and solid-electrolyte interphase (SEI) film to be formed on the LNMO cathode and graphite anodes. Furthermore, the preferential reduction of MgHPO 4 inhibits the lithium dendritic growth and enables the formation of a more stable SEI on the Li anode. Besides, the MgHPO 4 additive serves as a scavenger of detrimental HF, thus suppressing the Ni/Mn ions dissolution and improving the structural stability of LNMO. This study provides a cost-effective strategy involving the use of an inorganic additive for improving the electrochemical performance of high-voltage lithium-ion batteries.
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PubMed
高影响因子
Bioresources and Bioprocessing
·
2025
·Vol. 12
·期 1
·1-11
·
IF 5.1
Pan Xing,Qin Daen,Song Kaili,Dong Aixue
The development of biodegradable and environmental friendly wrap sizing agent is beneficial for reducing the impact of textile desizing effluent on environment. In this work, green and biodegradable keratin sizing agent with enhanced toughness and tenacity was prepared by adjusting side chain tails structure via thiol-ene click chemistry grafting modification for warp yarn slashing against film thermal-embrittlement and fracture during weaving. Feather keratin from waste feather has become an attractive target to replace petroleum-based Poly (vinyl alcohol) sizes due to its easy film-forming ability, excellent adhesive property, biodegradability and low cost. However, keratin yarn coating showed brittleness and easily peeled off from weaving yarn which highly restrict its application. Thus, polymer branched side chain tails with a structure that similar to the wrap yarn was grafted onto keratin molecular chain by utilizing its distinctive thio group as anchor point by means of click chemistry. The results showed that grafting modification could obviously improve the adhesiveness of keratin sizing by the principle of similarity compatibility. The sizing performance, desizing performance as well as its degradability were comprehensively studied. Successful utilization of modified keratin sizes will bring opportunities for the green and sustainable development of textile industry.
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高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 7
·4627-4644
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IF 4.9
Yuan Hua-Bin,Zhao Manman,Zhu Xiaowei,Sha Desheng,Chen Guoqiang,Xing Tieling
Numerous techniques for achieving superhydrophobic modification of cotton fabrics are documented in existing literature. However, pursuing multifunctionality, especially concerning textile performance, remains a topic of significant research interest. This study introduced a straightforward yet highly effective method for producing modified cotton fabric (SFC) exhibiting a vibrant orange-yellow coloration, along with exceptional self-cleaning, stain-resistant, UV-blocking, anti-icing, and photothermal de-icing properties, through the utilization of ferric chloride hexahydrate (FeCl 3 ·6H 2 O) and polydimethylsiloxane (PDMS). The surface of the SFC was evenly coated with small nanoparticles, identified by X-ray diffractometer (XRD) as β-FeOOH. The SFC displayed a water contact angle of 165.9° and a sliding angle of 2°, demonstrating outstanding superhydrophobicity. In addition, the SFC achieved a UPF value of 80, indicating exceptional UV-blocking capabilities. Additionally, the SFC exhibited remarkable stability when subjected to harsh conditions, including exposure to strong acid (pH = 1) and alkali (pH = 13), various chemical reagents, 600 min of water washing, and 30 cycles of abrasion testing. The approach proposed in this study offers the advantages of cost-effectiveness, environmental friendliness, and fluorine-free characteristics, and is applicable across a range of fabrics, and has certain practical utility. Graphical abstract
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Tang Minhao,Shen Ji,Wang Yiding,Zhao Yanfei,Gan Tao,Zheng Xusheng,Wang Dingsheng,Han Buxing,Liu Zhimin
The chemical recycling of polyester wastes is of great significance for sustainable development, which also provides an opportunity to access various oxygen-containing chemicals, but generally suffers from low efficiency or separation difficulty. Herein, we report anatase TiO 2 supported Ru and Mo dual-atom catalysts, which achieve transformation of various polyesters into corresponding diols in 100% selectivity via hydrolysis and subsequent hydrogenation in water under mild conditions (e.g., 160 °C, 4 MPa). Compelling evidence is provided for the coexistence of Ru single-atom and O-bridged Ru and Mo dual-atom sites within this kind of catalysts. It is verified that the Ru single-atom sites activate H 2 for hydrogenation of carboxylic acid derived from polyester hydrolysis, and the O-bridged Ru and Mo dual-atom sites suppress hydrodeoxygenation of the resultant alcohols due to a high reaction energy barrier. Notably, this kind of dual-atom catalysts can be regenerated with high activity and stability. This work presents an effective way to reconstruct polyester wastes into valuable diols, which may have promising application potential.
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PubMed
高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 13
·8369-8385
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IF 4.9
Gao Lu,Bao Yan,Tang Pei,Liu Chao,Zhang Wenbo
Eco-friendly and highly flame-retardant coatings for cotton fabrics urgently need to develop, but still faces significant challenges including the inadequacy of organic flame retardants, the adverse effects of high-load inorganic flame retardants on cotton fabrics, and the flammability of adhesives. Hence, this study describes a sandwich-like nanocoating for the fabrication of highly flame-retardant cotton fabric. Phytic acid (PA), a bio-based polyacid, was employed to prepare phosphorus-containing waterborne polyurethane (P-WPU) as the flame-retardant adhesive. With the help of multi-metallic layered double hydroxide (CoMnAl-LDH) and PA, six types of sandwich-like nanocoatings were constructed on cotton fabrics. Evaluation of their flame retardancy through vertical burning and cone calorimeter tests revealed that the sandwich-like nanocoating composed of PA as the top layer, P-WPU as the middle layer, and LDH as the bottom layer demonstrated exceptional flame retardancy in cotton fabric. It self-extinguishes within 5 s and the highest LOI value of 31.5% in all fabric samples, representing an increase of 89.76% over the pristine fabric. Meanwhile, the peak heat release rate (PHRR, 82.60 kW/m 2 ) and total heat release (THR, 1.67 MJ/m 2 ) were significantly reduced by 71.65% and 54.74%, respectively, relative to those of the pristine fabric. A synergistic flame-retardant mechanism was proposed that involved multiple barrier effects, catalyzing carbonization, and the release of non-flammable gases. Overall, this work may provide valuable insights for constructing highly flame-retardant cotton fabric, offering potential solutions to solve industry challenges.
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高影响因子
BULLETIN OF MATERIALS SCIENCE
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2025
·Vol. 48
·期 1
·1-13
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IF 2.1
Lu Ning,Wang Yuyu,Song Gongji,Zhang Zifan,Li Pengfei,Wang Jiannan,Xu Jianmei
Conductive scaffolds are gaining increasing attention in peripheral nerve repair for their good biocompatibility and electrical properties similar to those of normal nerves. In this study, silk fibroin (SF) nanofibre mats coated with polypyrrole (PPy) were prepared through electrospinning and chemical polymerization. Scanning electron microscopy (SEM) showed even and firm coating of PPy around the nanofibres, and fourier transform infrared spectroscopy (FTIR) analyses of the conductive mats confirmed the presence of hydrogen bonds or electrostatic interactions between PPy and SF. The conductivity of the composite mats could be regulated by varying the pyrrole monomer concentration from 10–20 mM, resulting in corresponding changes in conductivity from 9.4 ± 3.4 × 10 –5 to 4.6 ± 1.0 × 10 –3 S cm –1 . The mechanical strength, hydrophilicity and biodegradability of the mats exhibited similar changing trends. Biodegradability tests showed weight losses of 51.2, 13.6, 11.2 and 15.1% for composite mats with varying PPy coating rates on the 28th day, revealing that the biodegradability can be regulated and optimised by varying the pyrrole concentration. Schwann cell culture confirmed that the SF/PPy mats improved cell proliferation and adhesion compared to pure SF mats. The results demonstrate that the SF/PPy mats, with nanoscale surface, excellent biocompatibility, conductivity and controllable biodegradability, represent promising materials with potential for use in peripheral nerve regeneration. Graphical
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CELLULOSE
·
2024
·Vol. 31
·期 14
·8625-8645
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IF 4.9
Li Na,Xiu Huijuan,Wu Haiwei,Shen Mengxia,Huang Shaoyan,Fan Sha,Wang Simin,Wu Minzhe,Li Jinbao
The lithium-sulfur battery (LSB) is a highly promising energy storage system with merits of exceptional theoretical specific capacity and energy density. However, challenges including insufficient sulfur conductivity, volume expansion, and the polysulfide shuttle effect result in rapid capacity decay and limited cycle life of the LSB, which significantly hinders its development. Inspired by the structure and forming process of paper, a fiber double network skeleton was constructed using flexible pulp fiber (PF) and highly conductive carbon fiber (CF). Following the principles of wet end chemistry in papermaking, MXene nanosheets with high adsorption and catalytic capacity for polysulfides were self-assembled on the surfaces of PF and CF to fabricate composite paper-based materials. The interwoven mesh of PF exhibited strong binding force and stable structure, providing support and protection for the CF interwoven mesh, resulting in a composite material with abundant porosity and excellent structural stability. Moreover, the CF interweaving network combined with an overlaid MXene interweaving network established an effective three-dimensional conductive pathway. When utilized as a self-supporting cathode in LSB, this composite paper-based material demonstrated outstanding cyclic stability. Under conditions of sulfur load at 2.3 mg·cm −2 and discharge at 0.2 C, the specific discharge capacity remained at 952 mAh·g −1 after 200 cycles with a capacity retention rate reaching 95.4%. The CF/PF@Mxene (CPCMX) also exhibited excellent tensile strength measured at 7.19 MPa while maintaining exceptional flexibility and electrolyte wettability. This research presents a highly promising solution for advancing the development of LSB with superior cycle stability.
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Nano Research
·
2024
·
IF 9.5
Zhang Yu,Zhang Guangcheng,Ma Zhonglei,Qin Jianbin,Shen Xi
The increasing need for electromagnetic interference (EMI) shielding of electronics in cold environments such as those in aircraft, space exploration, and wearable heaters to avoid hazardous icing conditions or hypothermia requires the development of thin and lightweight EMI shielding materials preferably by absorbing rather than reflecting electromagnetic (EM) waves while also generating heat through energy-efficient electrothermal conversion. However, it is challenging to achieve absorption-dominant EMI shielding and energy-efficient electrothermal heating simultaneously in a thin and lightweight structure. Here, we develop a heterogeneous composite film comprising a porous multi-walled carbon nanotubes (MWCNTs)/bacterial cellulose (BC) film and an aligned MXene/Ag nanowires (NWs) backing via a sequential vacuum filtration process. The porous film contains random conductive networks of MWCNTs with moderate conductivity while the aligned MXene sheets atop Ag NWs network affords high conductivity in the backing, giving rise to graded electrical conductivity for absorption-dominant EMI shielding. The increasing Ag NW coverage leads to significantly increased electrical conductivity without increasing the EM wave reflection as well as the density and thickness of the film, yielding excellent specific EMI shielding effectiveness (> 8500 dB/(g·cm 2 )), low driving voltage for energy-efficient electrothermal heating (163 °C at 2.5 V), and fast response time (60 s) at a low areal density of 0.015 mg/cm 2 . Combining EMI shielding and electrothermal heating, the heterogeneous film developed here are promising contenders for the protection of electronic equipment in low-temperature environment.
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高影响因子
JOURNAL OF SOILS AND SEDIMENTS
·
2024
·
IF 2.8
Cheng Congcong,Chen Haijun,Xu Nan,Zhang Shan
Purpose The Cr(VI) removal capacity of green synthesized nano-zero-valent iron (GnZVI) using tea polyphenols (TPs) remains limited. To improve their application in contaminated soil and groundwater, the GnZVI was modified. This is necessary for in-situ remediation of heavy metal-contaminated soil and groundwater. Materials and methods The GnZVI-based carbon-composite (L&GnZVI@BC) was successfully constructed via the synergistic effect of L-cysteine modification and biochar support. The Cr(VI) removal capacity and transportability of L&GnZVI@BC were investigated in soil–water system by batch and column experiments. Results and discussion Comparison with two materials of GnZVI separately modified by L-cysteine (L-GnZVI) or supported by biochar (GnZVI@BC)), GnZVI composite with a combination modification of L-cysteine and biochar (L&GnZVI@BC, L-cysteine/biochar/Fe = 0.1/0.1/1) showed a much higher Cr(VI) removal capacity in soil and groundwater. The synergistic effect of the reduction of L-cysteine functional groups and the dispersibility of biochar support can enhance the transportability of L&GnZVI@BC in water-saturated sand media for more Cr(VI) adsorption at neutral pH; while that improved the soluble Fe(II) released from composite for the higher reduction of Cr(VI) into Cr(III) at acidic pH. Particularly, L&GnZVI@BC favored more Cr(III) generation during transport in porous media at lower pH when applied in the treatment of Cr(VI) contamination. Conclusion This research highlights that the modification of both L-cysteine and biochar was beneficial to sufficient transport and efficient remediation in Cr(VI)-contaminated soil and groundwater environments at different pH ranges. This study’s results provide a theoretical support for the practical application of nZVI composites in in-situ remediation of Cr(VI)-contaminated soil and groundwater via an environmental-friendly approach.
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2024
·
IF 2.3
Liu Qiong,Deng Siyuan,Wang Ziyi,Xie Linlin,Wang Guichao,Chen Zhenkui,Wu Xiaoxu,Li Zhi
Compared with nanoscale aerogels, the thermal conductivity of MTMS silica aerogel (MSA) is relatively large due to its micron-sized pore size, which hinders its popularization in the field of thermal insulation. In this study, the MSA samples with relatively low thermal conductivity (33.7 mW/m/K) and density (0.071 g/cm 3 ) were prepared. Then, the theoretical mathematical models of thermal conductivity were discussed and selected. The three-dimensional model based on X-ray microscopic CT slices was reconstructed for their micrometer-scale structure and based on this physical reconstruction model, finite element numerical simulations were carried out. The two-hierarchy structure of MSA was found during scanning electron microscopy, and the stepwise prediction of its effective thermal conductivity was carried out using the equivalence method. The mathematical model applicable to MSA was also modified to propose hierarchically theoretical calculation (HTC) for thermal conductivity. The feasibility and accuracy of the mathematical modeling method were verified by the finite element numerical simulation method based on the high-reduction three-dimensional reconstruction model, and the prediction results of the two were in good agreement with the experimental test data, of which the error was within 5%. Graphical Abstract
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高影响因子
危险品化学品经营许可证（带存储）