Advanced Science
·
2024
·
IF 14.3
Wei Shi,Hui Li,Jing Chen,Yern Chee Ching,Cheng Hock Chuah,Chengsheng Xu,Moran Liu,Jinyong Zhang,Kuan Yong Ching,Yongsheng Liang,Guanglin Li,Wei Tang
Hydrogels present attractive opportunities as flexible sensors due to their soft nature and tunable physicochemical properties. Despite significant advances, practical application of hydrogel-based sensor is limited by the lack of general routes to fabricate materials with combination of mechanical, conductive, and biological properties. Here, a multi-functional hydrogel sensor is reported by in situ polymerizing of acrylamide (AM) with N,N′-bis(acryloyl)cystamine (BA) dynamic crosslinked silver-modified polydopamine (PDA) nanoparticles, namely PAM/BA-Ag@PDA. Compared with traditional polyacrylamide (PAM) hydrogel, the BA-Ag@PDA nanoparticles provide both high-functionality crosslinks and multiple interactions within PAM networks, thereby endowing the optimized PAM/BA-Ag@PDA hydrogel with significantly enhanced tensile/compressive strength (349.80 kPa at 383.57% tensile strain, 263.08 kPa at 90% compressive strain), lower hysteresis (5.2%), improved conductivity (2.51 S m −1 ) and excellent near-infrared (NIR) light-triggered self-healing ability. As a strain sensor, the PAM/BA-Ag@PDA hydrogel shows a good sensitivity (gauge factor of 1.86), rapid response time (138 ms), and high stability. Owing to abundant reactive groups in PDA, the PAM/BA-Ag@PDA hydrogel exhibits inherent tissue adhesiveness and antioxidant, along with a synergistic antibacterial effect by PDA and Ag. Toward practical applications, the PAM/BA-Ag@PDA hydrogel can conformally adhere to skin and monitor subtle activities and large-scale movements with excellent reliability, demonstrating its promising applications as wearable sensors for healthcare.
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高影响因子
ACTA CHIMICA SLOVENICA
·
2021
·Vol. 68
·期 1
·102-108
·
IF 1.735
Yu-Mei Hao
A mononuclear copper(II) complex, [CuL] (1), and a phenolato-bridged trinuclear zinc(II) complex, [Zn3Cl2L2(DMF)2] (2), where L is the deprotonated form of N,N'-bis(4-bromosalicylidene)propane-1,3-diamine (H2L), have been prepared and characterized by elemental analyses, IR and UV-Vis spectroscopy, and single crystal X-ray diffraction. The Cu atom in complex 1 is in square planar coordination, while the terminal and central Zn atoms in complex 2 are in square pyramidal and octahedral coordination, respectively. The antibacterial activities of the complexes have been tested on the bacteria Staphylococcus aureus and Escherichia coli, and the yeast Candida parapsilosis.
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xiao Ma,Xue Zhao,Jianshe Huang,Litai Sun,Qun Li,Xiurong Yang
Herein, we develop a novel method to synthesize evenly dispersed fine Co nanoparticles (CoNPs) (particle size of ∼42 nm) encapsulated in a N-doped porous carbon matrix (NPCM) with superficial N-doped porous carbon nanofibers (NPCNF) (denoted as Co@NPCM/CNF-850) as an oxygen reduction reaction (ORR) electrocatalyst. Such an electrocatalyst is the direct pyrolysis product of the novel pine needle-like ZIF-67-based metal-organic framework nanowire array (MOFNWA) prepared using an inorganic cobalt carbonate hydroxide (Co(CO3)0.5(OH)·0.11H2O) nanowire array as a linear sacrificial template, which is totally different from the traditional method, that is, using inorganic salts to synthesize MOF particles. Because of the high dispersibility of the effective fine N-doped carbon-wrapped CoNPs (rather than the overlarge CoNP aggregates); the unique linear MOF-derived assemblies, which are beneficial to electronic transmission; the high degree of graphitization, which is attributed to the superficial NPCNF and carbon layers wrapping the CoNPs; as well as the high porosity, our catalyst showed remarkable ORR activity (Eonset of 1.033 V vs the reversible hydrogen electrode) in alkaline solution. Besides, our catalyst revealed excellent stability and tolerance of methanol. Furthermore, on the basis of the X-ray absorption near-edge structure, extended X-ray absorption fine structure, and linear sweep voltammetry data, we first provided proof that a catalyst devoid of obvious Co–Nx can have superior ORR activity.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 10
·118263
·
IF 6.3
Binbin Fan,Wei Sun,Dengke Zhao,Bohan Wang,Shuo Zhao,Feng Hu,Jie Zhang,Yiyao Ge,Zhipeng Xie,Kexin Chen,Guanghua Liu
Achieving a balance between high thermal conductivity and mechanical property remains a critical challenge for sintered reaction-bonded Si₃N₄ (SRBSN) ceramics. This work investigates the effects of α- and β-Si₃N₄ additions on nitridation behavior, microstructural evolution, and properties of SRBSN ceramics. The results reveal fundamentally different roles of α- and β-Si₃N₄ during nitridation and sintering. Moderate α-Si₃N₄ addition suppresses the α→β transformation, inducing localized grain growth and a bimodal microstructure at 20 wt%. In contrast, β-Si₃N₄ markedly promotes the α→β transformation and heterogeneous nucleation. The sample with 30 wt% β-Si₃N₄ exhibits a pronounced bimodal grain structure with 20.2 % coarse elongated grains (>6 μm), a maximum mean aspect ratio of 1.89, an ultrathin grain-boundary film (∼2.2 nm), and a nitrogen-rich intergranular phase. Consequently, a high thermal conductivity of 114 W·m⁻¹ ·K⁻¹ is achieved while maintaining a flexural strength of 791 ± 29 MPa and a fracture toughness of 9.0 ± 0.3 MPa·m 1/2 .
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Journal of Physical Chemistry Letters
·
2026
·Vol. 17
·期 33
·9746-9755
·
IF 4.5
Lan Zhineng,Wan Meng,Yan Huilin,Huang Hao,Liu Benyu,Lu Yi,Yang Yingying,Suo Yi,Zhang Guanzheng,Du Shuxian,Zhang Qiang,Wang Zhiwei,Jiang Tongtong,Sun Changxu,Qu Shujie,Yan Luyao,Cui Peng,Li Meicheng
Stability degradation plagues both
regular n-i-p and inverted p-i-n
perovskite solar cells (PSCs), with the organic hole transport layer
(HTL) constituting a key restricting factor. Poly(triarylamine) (PTAA)
possesses intrinsic polymer characteristics and excellent thermal
stability, rendering it a competitive candidate for high-performance
PSCs applicable to both device structures. However, challenging p-doping
procedures and vulnerability to humidity restrict its utilization.
Herein, we introduced a hydrophobic dilauroyl peroxide (DP) with oxidation
ability and a long-chain alkanes structure into the PTAA. Upon cleavage
of the peroxide bond (−O–O−) of DP, two decanoyl
free radicals are generated. These radicals seize the lone pair of
electrons on the N atom of the triarylamine in PTAA, oxidizing PTAA
into a positively charged radical PTAA •+ , thereby
achieving p-type doping of PTAA. This doping process enhances the
electrical properties and transport characteristics of PTAA. Besides,
the introduction of long-chain alkyl groups enhances the hydrophobicity
of the PTAA film, increasing the water contact angle from 60.18 °
to 80.39 ° . As a result, the champion PCE of n-i-p PSCs increased
from 23.49% to 24.82%, while that of p-i-n PSCs increased from 25.26%
to 26.04%. Moreover, the humidity stability and thermal stability
of the PSCs are enhanced. As a result, after the PSC aged for approximately
4752 h at 25 ° C and 45% relative humidity, it still maintained
97% of its initial PCE.
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MATERIALS AND STRUCTURES
·
2026
·Vol. 59
·期 4
·225
·
IF 3.9
Chen Mengzhu,Xu Chao,Hao Tingyu,Ran Bo,Li Kefei,Yu Linwen
To improve the durability of reinforced concrete in chloride-rich environments, the corrosion inhibition performance and mechanisms of N,N-dimethylethanolamine (DMEA) and calcium nitrite (CN) were systematically investigated. Their effectiveness was evaluated in simulated concrete pore (SCP) solutions and in reinforced concrete specimens subjected to laboratory wet–dry cycles and marine splash zone exposure. Electrochemical measurements demonstrated that both inhibitors delayed chloride-induced de-passivation of steel, increased the critical chloride threshold, and enhanced passive film stability. Optimal dosages were identified as 1.5 wt% for DMEA and 3.0 wt% for CN. These dosages increased the charge-transfer resistance ( R ct ) from 8.34 × 10 3 Ω·cm 2 (control) to 2.49 × 10 6 and 3.08 × 10 6 Ω·cm 2 , respectively, achieving high corrosion inhibition efficiencies of approximately 99.7%. Furthermore, the critical chloride threshold was increased from 0.17 to 0.34 M for 1.5% DMEA and 1.44 M for 3.0% CN, representing improvements of 1.0 and 7.4 times relative to the control. Surface analyses revealed that DMEA forms a thin, hydroxyl-rich organic layer through surface adsorption, whereas CN promotes the development of a dense, oxide-enriched passive film. Quantum chemical calculations and molecular dynamics simulations further elucidated their distinct inhibition mechanisms: DMEA strongly adsorbs via hydroxyl coordination, forming a physical barrier, while CN facilitates Fe 2+ oxidation to Fe 3+ , thereby stabilizing the passive film. These findings advance the understanding of organic and inorganic corrosion inhibitors in reinforced concrete and provide both theoretical and experimental support for their rational application in aggressive environments.
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MINERALS ENGINEERING
·
2026
·
IF 6
Xiaoqing Weng,Daozhong Li,Yingxin Chen,Hongqiang Li,Dongsheng He,Richard M. Kasomo,Qian Chen,Shaoxian Song
TTPC was first applied for reverse flotation of potassium feldspar from apatite. • TTPC exhibited superior selectivity for potassium feldspar over a wide pH range. • The collection mechanism involved electrostatic interactions and coordination complexation. • TTPC enabled efficient purification of raw phosphate rock via simultaneous reverse flotation. The simultaneous reverse flotation separation of potassium feldspar and dolomite from apatite is of great significance for the high-value development of phosphorus chemical industry. Nevertheless, the lack of effective and highly selective potassium feldspar collectors limits the widespread application of this method. In this study, (tri-n-butyl)-n-tetradecylphosphonium chloride (TTPC) was employed as a collector for the flotation separation of potassium feldspar from apatite. The pure mineral flotation experiments demonstrated that TTPC exhibited excellent collection ability and selectivity for potassium feldspar over a wide pH range (3–8) and low dosage. Further mechanistic analyses, including zeta potential, adsorption capacity, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), revealed that the [-R 4 P] + groups in TTPC could combine with the surface oxygen ion (O 2– ) sites of potassium feldspar, thus selectively adsorbing onto the potassium feldspar surface through electrostatic interactions and coordination complexation. More notably, the synergistic use of TTPC and fatty acid collectors in the simultaneous reverse flotation system effectively reduced the contents of potassium feldspar and dolomite in raw phosphate rock and obtained phosphate concentrate with the phosphorus pentoxide (P 2 O 5 ) grade increased from 23.28% to 27.38% and the recovery of 92.97%, which achieved the purification of phosphate rock and was superior to the conventional ether amine collector. Overall, this work provides new insights into the advanced application of simultaneous reverse flotation for phosphate rock purification. Download: Download high-res image (129KB) Download: Download full-size image
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FOOD RESEARCH INTERNATIONAL
·
2026
·
IF 8.8
Yingying Liu,Xue Wang,Yun Zhang,Danyang Zhang,Lei Zhu,Hongping Chen,Yunfeng Chai
2-Bromo- N,N -dimethylethanamine was used for fatty acids derivatization for the first time. • The derivatization method is simple, sensitive and exhibits minimal reagent residue. • The changes of 26 FFAs in different processing stages of black tea were profiled. • C16:0, C18:0, C18:2 and C18:3 displayed the most pronounced changes in black tea processing. As important precursors to aromatic substances in black tea processing, fatty acids deserve quantitative detection throughout the manufacturing procedure. We present a liquid chromatography/quadrupole orbitrap mass spectrometry method based on pre-column derivatization, which allows the simultaneous determination of 44 free fatty acids (FFAs, C3-C24). In this method, 2-bromo- N , N -dimethylethanamine was first used as a new derivatizing reagent. The derivatization system is simple and exhibits minimal reagent residue. After derivatization, the detection sensitivity of FFAs was increased by 2–4 orders of magnitude with satisfactory limit of quantitation (0.1–5 pg). Using this method, a total of 26 FFAs in black tea samples were identified and their dynamic changes at different processing stages were profiled. Among them, palmitic acid (C16:0), stearic acid (C18:0), linoleic acid (C18:2) and linolenic acid (C18:3) displayed the most pronounced changes in content and may therefore act as key indicators for monitoring black tea manufacture. Specifically, C16:0 and C18:0 exhibited a fluctuating downward trend (from 254.0 to 133.4 and 292.9 to 83.7 mg kg −1 , respectively), whereas C18:2 and C18:3 increased with fluctuations (from 18.8 to 55.0 and 13.6 to 69.2 mg kg −1 , respectively). Download: Download high-res image (142KB) Download: Download full-size image
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Jing Gao,Hao Dong,Peichao Zhang,Kunpeng Gao,Haipeng Su,Jianan Sun,Xiangzhao Mao
Whole-enzyme cascade degradation of crystalline α-chitin is a long-term pursuit, which has been hampered by low transformation efficiency and heterogeneous products. Here, a novel β-N-acetylglucosaminidase (NAGase) from Sulfuriroseicoccus oceanibius, designated Sohex, was biochemically characterized. The enzyme demonstrated high hydrolytic activity toward N-acetyl chitooligomers (N-acetyl COSs) and exhibited promotive effects on crystalline α-chitin degradation. Furthermore, a whole-enzyme cascade degradation system based on lytic polysaccharide monooxygenases (LPMOs), chitinases, and Sohex was developed for N-acetyl-D-glucosamine (GlcNAc) production. This system achieved a maximum conversion rate of 45.93%, with GlcNAc purity reaching 99.99%. The addition of Sohex significantly enhanced α-chitin degradation efficiency, achieving conversion rates of 1.37-fold and 2.46-fold compared to the LPMOs + chitinases system and the sole chitinases system, respectively. Moreover, the promotion mechanisms of Sohex in conjunction with LPMOs and chitinases were elucidated, making the cascade system a promising strategy for converting crystalline α-chitin into high-purity GlcNAc.
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ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Ruizhi Tang,Shujuan Ma,Quan Bai,Yangyang Bian,Zichao Tang,Junjie Ou
Host–guest interactions by artificially synthesized macrocyclic molecules, such as cucurbit[n]uril (CB[n], n refers to the number of glycoluril units), exhibited comparable affinity to natural biological interactions, offering orthogonal selectivities. These unique high-affinity interactions are crucial in bioseparation, particularly in the separation of complex biomacromolecules. However, to date, the application of supramolecular systems in bioseparation remains insufficient and challenging. In this work, a site-specific host–guest interaction-based method by CB[6] and CB[7] was developed for the selective enrichment of basic peptides, and their recognition for basic lysine/arginine (K/R) residues exhibited distinct selectivity. Although they both exhibited affinity to basic peptides, CB[6] tended to bind to peptides containing multiple K/R residues, while CB[7] preferred to adsorb peptides containing both phenylalanine residues and basic K/R residues. This difference was attributed to their distinct cavity sizes. Furthermore, CB[6]-containing monolith was employed for the enrichment of basic peptides from mouse liver sample digested with Staphylococcus aureus protease V8 (Glu-C). It is noteworthy that basic peptides containing 3–4 K/R residues can be successfully enriched, whereas those with more than 5 K/R residues cannot be effectively eluted. It was also observed that 1043 unique peptides were newly identified from 2.5 μg of mouse liver after the capture of basic peptides, with a markable increase in the identification coverage (31%). These newly identified peptides are generally more acidic and shorter than those depleted by CB[6], with median isoelectric point (pI) values of 5.8 and 7.0 and median lengths of 10 and 16 amino acids, respectively.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Li-Hui Liu,Jia-Yan Zhang,Guang-Xuan Tang,Yu-Hong Huang,Xiang-Qing Xie,Jun Geng,Hui-Xiong Lü,Hui Li,Yan-Wen Li,Ce-Hui Mo,Hai-Ming Zhao,Quan-Ying Cai
Endophytic bacteria can degrade toxic phthalate (PAEs). Nevertheless, the colonization and function of endophytic PAE-degrader in soil-crop system and their association mechanism with indigenous bacteria in PAE removal remain unknown. Here, endophytic PAE-degrader Bacillus subtilis N-1 was marked with green fluorescent protein gene. Inoculated strain N-1- gfp could well colonize in soil and rice plant exposed to di-n-butyl phthalate (DBP) as directly confirmed by confocal laser scanning microscopy and realtime PCR. Illumina high-throughput sequencing demonstrated that inoculated N-1- gfp shifted indigenous bacterial community in rhizosphere and endosphere of rice plants with significant increasing relative abundance of its affiliating genus Bacillus than non-inoculation. Strain N-1- gfp exhibited efficient DBP degradation with 99.7% removal in culture solutions, and significantly promoted DBP removal in soil-plant system. Strain N-1- gfp colonization help plant enrich specific functional bacteria (e.g., pollutant-degrading bacteria) with significant higher relative abundances and stimulated bacterial activities (e.g., pollutant degradation) compared with non-inoculation. Furthermore, strain N-1- gfp displayed strong interaction with indigenous bacteria for accelerating DBP degradation in soil, decreasing DBP accumulation in plants and promoting plant growth. This is the first report on well colonization of endophytic DBP-degrader Bacillus subtilis in soil-plant system and its bioaugmentation with indigenous bacteria for promoting DBP removal.
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Frontiers in Microbiology
·
2022
·
IF 6.064
Chen Yan,Zhou Ning,Chen Xueman,Wei Guoguang,Zhang Alei,Chen Kequan,Ouyang Pingkai
In this study, a gene encoding β-N-acetylglucosaminidase, designated NAGaseA, was cloned from Chitinibacter sp. GC72 and subsequently functional expressed in Escherichia coli BL21 (DE3). NAGaseA contains a glycoside hydrolase family 20 catalytic domain that shows low identity with the corresponding domain of the well-characterized NAGases. The recombinant NAGaseA had a molecular mass of 92 kDa. Biochemical characterization of the purified NAGaseA revealed that the optimal reaction condition was at 40°C and pH 6.5, and exhibited great pH stability in the range of pH 6.5–9.5. The Vmax, Km, kcat, and kcat/Km of NAGaseA toward p-nitrophenyl-N-acetyl glucosaminide (pNP-GlcNAc) were 3333.33 μmol min–1 l–1, 39.99 μmol l–1, 4667.07 s–1, and 116.71 ml μmol–1 s–1, respectively. Analysis of the hydrolysis products of N-acetyl chitin oligosaccharides (N-Acetyl COSs) indicated that NAGaseA was capable of converting N-acetyl COSs ((GlcNAc)2–(GlcNAc)6) into GlcNAc with hydrolysis ability order: (GlcNAc)2 > (GlcNAc)3 > (GlcNAc)4 > (GlcNAc)5 > (GlcNAc)6. Moreover, NAGaseA could generate (GlcNAc)3–(GlcNAc)6 from (GlcNAc)2–(GlcNAc)5, respectively. These results showed that NAGaseA is a multifunctional NAGase with transglycosylation activity. In addition, significantly synergistic action was observed between NAGaseA and other sources of chitinases during hydrolysis of colloid chitin. Finally, 0.759, 0.481, and 0.986 g/l of GlcNAc with a purity of 96% were obtained using three different chitinase combinations, which were 1.61-, 2.36-, and 2.69-fold that of the GlcNAc production using the single chitinase. This observation indicated that NAGaseA could be a potential candidate enzyme in commercial GlcNAc production.
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危险品化学品经营许可证（带存储）