JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 44
·e53070
·
IF 3.057
Yuanyu Ge,Zhenming Qi,Desheng Sha,Xiaosai Hu,Shiwen Liu
Intumescent flame retardant (IFR) is the new generation of environmentally friendly flame retardant. The improved water solubility of IFR enhances its application in cellulose-based textiles. A water-soluble carbon–nitrogen–phosphorus (C–N–P) ternary IFR (PTETP) was synthesized using cyanuric chloride (TCT), ethylene glycol (EG), and O-phosphoethanolamine (O-PEA) as starting materials. The burning performance of untreated and PTETP treated cotton fabrics was evaluated using vertical flammability test (VFT), limiting oxygen index (LOI), and cone calorimetry. The results indicate that with the increase of PTETP content, the flame retardant performance of cotton fabrics is gradually enhanced. The cotton fabric treated with 10 wt% PTETP shows no afterflame combustion, has a char length of 98 mm, and a LOI of 30.8%. Compared with pristine cotton fabric, the peak heat release rate (PHRR) and total heat release (THR) of the treated cotton fabric were reduced by 52.6% and 28.2%, respectively. Thermogravimetric (TG) shows that PTETP effectively improves the thermal stability and reduces the thermal decomposition temperature of cotton fabric, and even can increases the residual carbon rate by 20%. In addition, the employment of PTETP shows no harm on the tensile strength of cotton fabrics. After washing 20 times, LOI of flame-retardant cotton fabric still remained almost 26%.
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高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 152
·期 7
·1950-1960
·
IF 3.186
Wang Qing,Shi Shaojie,Wu Fan,Zhang Zhiguo,Li Guoneng,Zheng Youqu,Suo Yange
Abstract In this work, highly active CoZn nanocrystals embedded in N-doped graphene layers (CoZn@NG-nPVP) towards oxygen reduction reaction (ORR) were synthesized through pyrolysis of bimetallic zinc cobalt Prussian blue analogues (i.e., Zn 3 [Co(CN) 6 ] 2 -nPVP), which consists of coordination band between zinc and [Co(CN) 6 ] 3− , with PVP as a structure regulator. The obtained CoZn@NG-nPVP samples display three-dimensional porous microsphere structures. Compared with CoZn@NG samples derived from Zn 3 [Co(CN) 6 ] 2 without PVP, the CoZn@NG-nPVP samples derived from Zn 3 [Co(CN) 6 ] 2 -nPVP with PVP exhibit more carbon defects, larger BET specific surface area, and higher contents of pyridinic-N and graphitic-N, leading to the high activity of the catalyst. The onset potential of CoZn@NG-4PVP-900 catalyst towards ORR is 0.98 V (vs. RHE) and the half-wave potential is 0.87 V (vs. RHE), which are comparable with that of commercial Pt/C. In addition, the electrochemical stability of CoZn@NG-4PVP-900 is much higher than that of commercial Pt/C. Graphic Abstract
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CATALYSIS LETTERS
·
2015
·Vol. 145
·期 4
·1014-1021
·
IF 2.307
Li Yan,Li Bing,Geng Longfei,Wang Jun,Wang Yong,Huang Jun
Vanadium catalysts supported on N-doped carbon materials (CN) were prepared and the catalyst VOSiW showed high activity for the hydroxylation of various aromatics with O 2 . Aromatics with electron-withdrawing groups such as CN, NO 2 , COOH, CF 3 , COCH 3 and aromatic halides (F, Cl and Br) were oxygenated to the corresponding phenols in considerable yields. The CN materials were not only indispensable for the reusability of the vanadium catalyst VOSiW, but also favorable to the high catalytic activity. The VOSiW catalyst is ready for the hydroxylation of aromatics with O 2 as both V 4+ and V 5+ species are coexisted in the VOSiW catalyst. Graphical
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Yu Xiao,Wei Li,Cheng Chang,Yuexing Chen,Li Huang,Jiaqing He,Li-Dong Zhao
We report n-type PbTe with a maximum ZT ∼1.2 at 673 K and an average ZT ave ∼0.84 at 300–823 K, which was achieved through a Sn and Se co-alloying approach. We find that the lattice thermal conductivity can be largely reduced through introducing Se in Te sites, and the power factor can be enhanced through introducing Sn in the Pb sites. Combining two strategies via Se and Sn co-alloying in PbTe, results show that the lattice thermal conductivity at 300 K can be reduced from ∼3.1 Wm −1 K −1 to ∼1.2 Wm −1 K −1 after alloying 15% Se, which is consistent with the Callaway model. Meanwhile, we find that both carrier concentration and mobility can be enhanced through alloying small amount of Sn, which are supported by DFT calculation with emphasis on the defect formation energies . The improvement on electrical conductivity elucidates an enhanced power factor at 300 K increasing from ∼6.4 μWcm −1 K −2 to ∼14.6 μWcm −1 K −2 . Through synergistically optimizing electrical and thermal transport properties of n-type PbTe via Sn and Se co-alloying, the ZT value is distinctly enhanced to 1.2 at 673 K, and the average ZT ave value is improved by ∼35%, from ∼0.62 in PbTe 0.997 I 0.003 to ∼0.84 in Pb 0.995 Sn 0.005 Te 0.847 Se 0.15 I 0.003 , ensuring a high maximum thermoelectric conversion efficiency ∼10.7%.
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Science China-Materials
·
2020
·Vol. 63
·期 9
·1769-1778
·
IF 6.098
Xu Jingjing,Wu Hongping,Yu Hongwei,Hu Zhanggui,Wang Jiyang,Wu Yicheng
Alike phosphates, silicates and germanates exclusively containing tetrahedral basic building units (BBUs) can also exhibit ultraviolet (UV) even deep-UV transitions. They are important for the design of new UV or deep-UV nonlinear optical (NLO) materials. In this paper, four new alkali metal silicates and germanates, Li 2 Rb 4 Si 6 O 15 , Li 2 Cs 4 Si 6 O 15 , Li 3 Rb 3 Ge 6 O 15 and Li 3 Cs 3 Ge 6 O 15 were successfully synthesized by a high temperature solid state reaction. They obey the general formula of Li m A n M 6 O 15 (A=Rb, Cs; M=Si, Ge; m+n =6) and all exhibit the Sr 2 Be 2 B 2 O 7 (SBBO)-like structures. More importantly, Li 3 Rb 3 Ge 6 O 15 and Li 3 Cs 3 Ge 6 O 15 crystallize in the noncentrosymmetric (NCS) structures and exhibit remarkable phase-matched second harmonic generation (SHG) effect, 0.8×KH 2 PO 4 (KDP) and 1×KDP, respectively. These indicate that they are potential as UV or deep-UV NLO materials. Furthermore, their optical and NLO properties as well as thermal properties were measured. The structure-property relationships were studied by the dipole moment calculations and the first-principles calculations.
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FUEL PROCESSING TECHNOLOGY
·
2025
·
IF 7.7
Wei Zhang,Jiangnan Xiang,Yuting Wang,Mengxi Ma,Yan Wang,Bo Qin,Weijiong Dai,Binbin Fan,Jiajun Zheng,Ruifeng Li
In this paper, a one-dimensional ten-membered ring microporous molecular sieve ZSM-48 is employed as a model catalyst, with the number and positional distribution of acid sites in ZSM-48 molecular sieve adjusted by regulating the temperature of templating agent exfoliation. XRD, FT-IR, SEM, TG, NH 3 -TPD, N 2 adsorption-desorption, and the zero-length column (ZLC) method are used for characterization and analysis. The decrease in the distribution depth of acid sites within the microporous channels of ZSM-48 will not only significantly affects the hydroisomerization performance of n -dodecane (resulting in a final yield of isododecane of more than 80 %) but also influences the yield ratio of multi-branched and mono-branched isomers. After the conversion is stabilized, the yield ratio of multi-branched to mono-branched isomers for Z-48-350 is 1.4 to 2.1 times higher than that for Z-48-550. Furthermore, acid site distribution depth profoundly influences reactant diffusion, with Z-48-120 exhibiting a 115 % higher effective diffusion constant than Z-48-550 at 140 °C. Shortening the distribution depth of acid sites in the micropores does not significantly change the product distribution of n -dodecane monomethyl isomers but markedly suppresses the cracking reaction due to reduced diffusion limitation of olefinic intermediates. This enables efficient and selective hydroisomerization of long-chain n -alkanes.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Jiafa Chen,Peng Bai,Shibo Yuan,Yi He,Zifan Niu,Yicheng Zhao,Yongdan Li
Designing highly efficient photocatalyst for the valorization of CO 2 is an ideal strategy to reduce greenhouse gas emissions and utilize solar energy. In this study, a S-scheme heterojunction photocatalyst is fabricated by solvothermal impregnation of ZnO on W 18 O 49 for photocatalytic CO 2 N -formylation of aniline. The localized surface plasmon resonance effect of W 18 O 49 improves the absorption capacity for long-wave light significantly, and the hot electrons generated in W 18 O 49 with a high energy can migrate to the conduction band of ZnO and thus enhance the photocatalytic reduction ability. Meanwhile, the S-scheme heterojunction facilitates the separation of photoinduced charge carriers and preserves the redox ability of W 18 O 49 /ZnO composite photocatalyst. The conversion of aniline reaches 99.1% after 5 h reaction under visible light irradiation at room temperature with an N -formylaniline selectivity of 100%. A possible photocatalytic reaction mechanism is proposed. This study paves a promising way for the design of highly efficient photocatalyst and the sustainable utilization of CO 2 .
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 8
·1708
·
IF 4.6
Yashu Li,Nan Wang,Lu Zhao,Xuanhe Liu,Lin Wang,Chengcheng Xie,Jing Li
Developing low-cost, efficient, and scalable non-precious metal electrocatalysts for the oxygen reduction reaction (ORR) remains a critical challenge in the field of energy conversion. Among various candidates, Fe-N-doped carbon materials have garnered attention as promising alternatives to commercial Pt/C catalysts for ORR. In this study, we report an Fe-N catalyst synthesized by incorporating iron phthalocyanine withCinnamomum longepaniculatumwaste leaves as the carbon source. This catalyst exhibited an excellent four-electron ORR activity and the half-wave potential (E1/2) reaches 0.875 V, which was superior to that of commercial Pt/C (E1/2= 0.864 V). Additionally, the catalyst exhibits superior methanol tolerance and stability compared to commercial Pt/C. This approach, which utilizes biomass waste for the synthesis of electrocatalysts, not only provides an effective solution for reducing environmental waste but also addresses the issue of sluggish cathodic ORR kinetics in fuel cells, making it suitable for low-cost, large-scale industrial production.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiaoxiao Li,Yu Yan,Xiaonan Zheng,Yuan Yao,Yang Liu
Single atom catalysts (SACs) exhibit impressive catalytic activity for various reactions due to low coordination environment and tunable electronic structures, attracting increasing attention. However, it is big challenge to develop transition-metal-based SACs for oxygen reduction reaction (ORR) with high stability. Bioinspired by the structure and mechanism of vanadium-dependent haloperoxidase, we herein demonstrate that saturated coordination could boost ORR activity of atomically dispersed V-N-C catalyst combining DFT prediction and experimental verification. Spontaneous axial OH coordination to V-N-C catalyst in alkaline electrolyte not only optimizes the adsorption interaction for key intermediates to boost ORR activity, but also keeps vanadium atom at the highest valence against Fenton activity to improve the stability. The as-designed catalyst exhibits half-wave potential of 0.858 V vs . RHE for ORR, comparable to the commercial Pt/C benchmark. This work provides a proof-of-concept design of SACs and broadens the horizon of its potential applications.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2014
·
IF 4.517
Qing Wang,Jie Chen,Kun Huang,Xin Zhang,Li Xu,Zhi-guo Shi
A hydrophilic stationary phase (SP) was prepared through grafting N -methylene phosphonic acid chitosan on magnesia–zirconia particles (P-CTS-MgO–ZrO 2 ) via Lewis acid–base interaction. The resulting material was characterized by thermogravimetric analysis, Fourier transform infrared spectroscopy, scanning electron microscope and nitrogen adsorption analysis. The chromatographic performance of P-CTS-MgO–ZrO 2 was systemically evaluated by studying effect of acetonitrile content, pH and buffer concentration in the mobile phase. The results demonstrated that the novel SP provided hydrophilic, electrostatic-repulsion and ion-exchange interactions. Compared to the bare MgO–ZrO 2 , P-CTS-MgO–ZrO 2 exhibited superior peak shape, reasonable resolution and reduced analysis time in separation of basic analytes. Besides, remarkable resolving power of acids, i.e. six non-steroidal anti-inflammatory drugs which failed to be eluted from the bare MgO–ZrO 2 , was obtained with the theoretical plate number (N/m) of 4653–31313, asymmetry factor <1.21 and the resolution of 1.6–3.4. Finally, P-CTS-MgO–ZrO 2 SP was applied to separate monosaccharides, phospholipids and peptides. P-CTS-MgO–ZrO 2 was a promising hydrophilic SP for wide applications.
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PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2025
·
IF 3.8
Yang Qian,Zhang Yong,Zhang He,Yang Zi,Feng Yanruyu,Ye Bengui,Gong Puyang,Qian Guangsheng,Li Dapeng
Sexual dimorphism plays a critical role in disease pathophysiology, but the subtlety and complexity of these differences, along with a lack of precise comparative methods, hinder the advancement of precision medicine and drug development. This limitation is particularly evident in metabolic dysfunction–associated steatotic liver disease (MASLD), where sex-specific molecular mechanisms remain insufficiently understood. To address this gap, we employed an advanced integrative N-glycoproteomics and proteomics approach to systematically analyze sex-biased molecular signatures in primary mouse hepatocytes (PMHs) under healthy and MASLD conditions. Our analysis identified 280 sex-biased proteins and 39 sex-biased N-glycosites, and KEGG enrichment revealed that female-biased molecules were primarily involved in lipid metabolism, while male-biased molecules were associated with inflammation and cytoskeletal remodeling. A combined dataset of 302 sex-biased molecules was further analyzed using protein–protein interaction (PPI) analysis and Rc value calculations, resulting in the identification of 21 hub proteins and 2 hub N-glycosites as MASLD-associated sex-biased signatures. Notably, MASLD amplified proteomic sex differences while attenuating them in N-glycosylation. Western blot validation of key signatures, including female-biased MVK and male-biased LGALS3, highlighted distinct molecular adaptations between the sexes in MASLD progression. Our study introduced an advanced analytical framework for high-resolution comparative molecular profiling by integrating N-glycoproteomics with proteomics, providing valuable insights into sex-biased molecular signatures, enhancing preclinical model development, and advancing sex-specific therapeutic strategies in MASLD research and broader biological systems. Graphical
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qingsong Luo,Yu Wan,Zhenxing Wang,Shuang Gao,Yan Chen,Changhao Feng
In the field of environmental monitoring, metal oxide semiconductor (MOS)-based gas sensors demonstrate significant advantages in detecting volatile organic compounds (VOCs) in ambient air. Gas sensors based on Yttrium-doped Zinc Ferrite nanofibers (Y-doped ZFO NFs) are fabricated via a conventional electrospinning method, with varying molar ratios of Y/Zn (0 at%, 2 at%, 4 at%, and 6 at%). Here, the doping of rare earth element Y significantly enhances the gas sensing performances. The structural and morphological information of both pristine ZFO and Y-doped ZFO NFs have been characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and Transmission electron microscope (TEM). Compared with pure ZFO, the 4 at% Y-doped ZFO (S3) exhibits a 4.46-fold higher response (R a /R g = 43.1) to 100 ppm n-butanol at 150℃ with a fast response time of 11 s. Additionally, the Y-doped ZFO NFs gas sensors exhibit outstanding selectivity, remarkable long-term stability, and a low limit of detection (LOD) attributed to their small grain size, porous and rough morphology, abundant oxygen vacancies, and the formation of n-n heterojunctions.
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