查找使用阿拉丁产品的科研文献

Corrosion Inhibition Performance of 2-Aminothiophene-3-carboxamide for Copper in 3.5 wt.% NaCl Solution

Qianfei Huang,Junqing Yang,Junkai Hu,Changhong He

Developing highly efficient organic corrosion inhibitors plays a crucial role in enhancing copper's resistance to degradation in aggressive environments. This research evaluates the corrosion inhibition efficacy of 2-aminothiophene-3-carboxamide (2ATCA) at the copper interface in simulated seawater medium (3.5   wt% NaCl). The findings indicate that incorporating 0.60   g/L of 2ATCA into the NaCl solution leads to a significant drop in corrosion current density, from 12.1 μA·cm -2 to 1.7 μA·cm -2 , achieving an inhibition efficiency of 86%. The Langmuir adsorption isotherm model was derived by applying the thermodynamic principles governing the corrosion inhibitor's mechanism. The surface characteristics and composition of copper were characterized through a combination of analytical techniques including scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The adsorption inhibition mechanism and reactivity of 2ATCA on the copper surface were further investigated through theoretical computational analysis. This study not only elucidates the adsorption behavior and mechanism of 2ATCA on copper but also provides a foundation for designing more effective organic inhibitors for copper corrosion in marine environments.

Deformation mechanism and high thermoelectric performance of sodium doped Ag2S1/3Se1/3Te1/3 plastic semiconductors

Yao Dai,Yubo Luo,Yingchao Wei,Tianshun Xiong,Chengwei Sun,Wenjie Shu,Guanzheng Luo,Linyao Wu,Shuhui Zhang,Qinghui Jiang,Xin Li,Zheng Ma,Yao Luo,Yan Liu,Dan Zhang,Junyou Yang

Inorganic plastic thermoelectric materials have attracted much attention for breaking the brittle bottleneck of traditional inorganic thermoelectric materials. The Ag2(S, Se, Te) system is one of the most novel and promising thermoelectric semiconductors. To enhance its thermoelectric performance, substitution of Na for Ag is adopted to modulate the electrical and thermal transport properties of Ag2S1/3Se1/3Te1/3, through enhancing phonon scattering and effective mass. It enables us to achieve a record high average power factor (PF) of 7.4 μW cm−1 K−2 in the temperature interval of 300–500 K and a room-temperature thermoelectric figure of merit (ZT) of 0.50 and a peak ZT of 0.84 at 500 K in Ag2(S, Se, Te), respectively. In addition, the slip mode of Ag2S1/3Se1/3Te1/3 plastic deformation is also revealed for the first time, in which the crystal slip behavior is dominated by the {112}〈111〉 slip regime, instead of the conventional {110}〈111〉 view. The obtained high thermoelectric performance, as well as the maintained plastic performance, shows broad application prospects in waste heat recovery and wearable devices.

Enhancement of processability, thermal stability, and mechanical properties of phthalonitrile resins via 3-aminophenylacetylene modification

Lebing Lian,Xiaotao Bai,Fengguang Jiang,Yongcheng Zhang,Xuan Feng,Min Liu,Quan Zhou

Phthalonitrile resins are widely recognized for their outstanding heat resistance, dielectric properties, and mechanical properties. However, the excessively high melting temperature and narrow processing window constrain their applications in fields such as thermal protection. This study successfully prepared BPL-P resins with enhanced processing, thermal, and mechanical properties by modifying laboratory-synthesized silicone-containing phthalonitrile (BPL) resins with 3-aminophenylacetylene (APA). The alkyne group in APA can self-polymerize to form polyene and trisubstituted benzene structures, and the amino group in APA encourages the conversion of cyano groups into triazine and phthalocyanine. These modifications confer exceptional thermal and thermo-oxidative stability to the resins, with the T d5 of BPL-P2 resin (containing 20 wt% APA) reaching 563.2°C and 522.2°C, respectively. Additionally, the strong solubility and relatively low viscosity of APA significantly enhance the processing performance of the resin. The softening point of BPL-P2 resin decreases from 161°C to 94°C, and its processing window expands from 32°C to 59°C under a viscosity of 1 Pa·s. Moreover, the mechanical properties of the quartz fiber-reinforced composite QF/BPL-P2 were substantially enhanced, with flexural strength increasing from 673.6 MPa to 731.9 MPa at room temperature, and from 115.1 MPa to 358.4 MPa after heat treatment at 400°C for 16 h. These findings broaden the potential applications of phthalonitrile resins in high-end industrial sectors.

Efficient near-infrared luminescence in phosphate Na2AlTi(PO4)3:Cr3+ for light-emitting-diodes applications

Nasi Yu,Wenhua Li,Jiyou Zhong

Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) have an extensive range of applications within multiple fields, such as bioimaging, night vision and non-destructive examination. Therefore, developing broadband, low-cost, and efficient NIR phosphors capable of satisfying the demands of the above applications is desired. In this work, a series of inexpensive phosphate Na 2 AlTi(PO 4 ) 3 :Cr 3+ phosphors were developed. This material shows a broadband NIR emission covering 700-1200 nm with emission peak located at 830 nm and a full width at half maximum (FWHM) of 152 nm under 470 nm excitation. Moreover, the photoluminescence quantum yield (PLQY) can be optimized to 79.1%, suggesting a high efficiency among octahedral Al 3+ -containing NIR materials. Finally, a prototype NIR pc-LED device was fabricated via directly coating the InGaN blue LED chip with the optimized Na 2 AlTi(PO 4 ) 3 :Cr 3+ phosphor. The NIR output power of the device was determined to be 17.24 mW at 100 mA driving current, and the corresponding NIR photoelectric conversion efficiency was 7.51%, indicating the excellent output performance, and good potential in practical applications.

A Magnetic Colorimetric Aptasensor Based on Fe3O4@CQDs Nanocomposites for Ultrasensitive Detection of Glypican-3

Lingling Fan,Cunhong Cen,Yuru Wu,Xiaohua Deng,Yuxuan Shi,Yuxing Huang,Xiaohong Tan,Shidong Li,Guiyin Li

Hepatocellular carcinoma (HCC) remains one of the most lethal malignancies worldwide, underscoring the urgent demand for early diagnostic strategies to improve patient survival rates. Glypican-3 (GPC3), a highly specific biomarker of HCC, has emerged as a promising target for early detection. Herein, we developed an innovative magnetic colorimetric aptasensor using ferrosoferric oxide@carbon quantum dots (Fe₃O₄@CQDs) nanocomposites. The Fe₃O₄@CQDs nanocomposites combine the magnetic properties of Fe₃O₄ with the unique optical characteristics of CQDs, exhibiting intrinsic peroxidase‑like activity. The animo-modified GPC3 aptamer (GPC3_Apt) was covalently conjugated onto the Fe₃O₄@CQDs nanocomposites surface via EDC/NHS chemistry to form the recognition probe (Fe₃O₄@CQDs-GPC3_Apt). Upon specific binding between the aptamer and GPC3, the resulting complexes (Fe₃O₄@CQDs-GPC3_Apt-GPC3) modulate the catalytic oxidation of o-phenylenediamine (OPD) by H₂O₂, generating a yellow oxOPD product whose absorbance intensity correlated with GPC3 concentration. The proposed colorimetric aptasensor demonstrated a detection limit of 3.16 ng/mL and a linear range of 10–200 ng/mL, with high specificity against interfering proteins. It was successfully validated in human serum samples, yielding recoveries between 99.27% and 109.33%. Owing to its operational simplicity and cost‑effectiveness, this platform offers transformative potential for point-of-care HCC screening. Beyond advancing GPC3 detection, the work provides a flexible design paradigm that can be adapted for assays targeting other disease biomarkers.

Na3MnZr(PO4)3 fast ionic conductor modulates zinc flux to achieve homogeneous Zn plating/stripping

Mingjun Wu,Yiqing Ouyang,Mingjian Zhao,Yuyao Wu,Zhengying Wang,Qiang Ru

An artificial interphase of Na 3 MnZr(PO 4 ) 3 (NMZP) is engineered on the zinc metal surface as a fast ion conductor to efficiently modulate zinc flux and stabilize the anode. Fabricated via a sol-gel method, NMZP possesses a NASICON-type open 3D framework, high structural stability, robust corrosion resistance, and exceptional ionic conductivity, providing favorable pathways for Zn 2+ diffusion. The NMZP interphase modulates Zn 2+ flux through ionic confinement effects while promoting desolvation of [Zn(H 2 O) 6 ] 2+ species prior to deposition, thereby suppressing parasitic reactions. This dual mechanism ensures uniform zinc nucleation and deposition beneath the protective layer, effectively inhibiting dendritic growth and enhancing cycling stability. Benefiting from robust protective function of the NMZP layer, the NMZP@Zn symmetric cell achieves stable cycling beyond 650 hours at 3.0 mA cm -2 and 1.0 mAh cm -2 with minimal polarization. This study establishes an engineered interphase strategy for realizing long-lived, dendrite-free zinc-ion batteries.

A Janus Li1.5Al0.5Ge1.5(PO4)3 with high critical current density for high-voltage lithium batteries

Wenping Zha,Yadong Ruan,Zhaoyin Wen

The application of Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) is hindered by chemical instability with lithium (Li) metal and poor interfacial compatibility with high-voltage cathodes. Herein, an in-situ Janus LAGP is fabricated to solve the above two issues simultaneously. On the cathodic side, a succinonitrile-based interlayer with good oxidation stability is applied to facilitate ion transport at the interface and inside the cathode. On the anodic side, Fluoroethylene carbonate (FEC)-based polymer interlayer is chosen to ameliorate side reactions on LAGP/Li interface and inhibit the dendrite growth. Consequently, the Li symmetric cell with the Janus LAGP possesses a high critical current density of 5.4 mA cm −2 and operates stably for over 500 h at a high current density of 1.0 mA cm −2 . Moreover, the Janus LAGP exhibits excellent ionic conductivity (4.76 × 10 −4  S cm −1 ), wide electrochemical window (0–5.2 V vs. Li + /Li) and stable interfacial compatibility with high-voltage cathodes. The solid-state lithium battery (LiNi 0.8 Co 0.1 Mn 0.1 O 2 /Li) delivers a maximum discharge capacity of 178 mAh g −1 with a retention of 85.7% after 100 cycles at 0.5C. Notably, when the mass loading is increased to 10.0 mg cm −2 , the battery delivers a maximum discharge capacity of 134.1 mAh g −1 (1.52 mAh) at 0.5C, and the capacity remains 76.1% after 100 cycles.

Discovery of N-hydroxy-4-(1H-indol-3-yl)butanamide as a histone deacetylase inhibitor

Jiang Bian,Yepeng luan,Chunbo Wang,Lei Zhang

General chemical synthesis of cyanidin-3-O-glycosides: configuration determination and structure-activity relationship analysis

Zipeng Zheng,Jun Hu,Weijie Zhou,Hongqing Yuan,Jianxia Sun,Yongbin Xu,Weibin Bai

Anthocyanins are a class of water-soluble flavonoid pigments widely distributed in plants, characterized by their flavylium cation core. Glycosylation modifications exert significant effects on the biological activities of anthocyanins with identical aglycones. This study accomplished the first chemical syntheses of cyanidin-3-O-galactoside (C3Gal) and cyanidin-3-O-arabinoside (C3Ara), providing a general glycosylation strategy. The configurations of β-D-galactopyranoside and α-L-arabinopyranoside were determined by 2D NMR. Comparative analysis of cyanidin-3-O-glucoside (C3Glu), C3Gal, and C3Ara revealed that C3Glu was the most stable, whereas C3Ara and C3Gal exhibited superior antioxidant activity. C3Ara also showed the strongest inhibition against α-amylase (IC 50  = 98.16 μM), consistent with molecular docking predictions. These results reveal the key structure-activity: hexoses (glucose, galactose) have higher stability and reduced activity. Pentosyl arabinosides have higher biological activity. This work provides a reliable preparation method and research direction for anthocyanin glycosides.

Luminescence and energy transfer of the color-tunable phosphor Li6Gd(BO3)3:Tb3+/Bi3+, Eu3+

Peican Chen,Fuwang Mo,Anxiang Guan,Rongfang Wang,Guofang Wang,Siyu Xia,Liya Zhou

Bi 3+ /Tb 3+ , Eu 3+ co-doped Li 6 Gd(BO 3 ) 3 (LGBO) phosphors were synthesized via a traditional solid-state method. Phase purity was investigated using X-ray diffraction, absorption strength of the phosphors were investigated by UV–vis absorption spectra , and the photoluminescence properties of the phosphors were studied systematically. Results showed that the emission intensity of Bi 3+ , Eu 3+ co-doped LBOG was 2.76 times higher than that of Eu 3+ -doped LGBO irradiated at 275   nm, thereby implying the possibility of energy transfer from Bi 3+ to Eu 3+ . The excitation spectra of Tb 3+ , Eu 3+ co-doped LGBO phosphors are broader in comparison with single-doped phosphors and show tunable colors from green to yellow to orange-red when the ratio of Tb 3+ to Eu 3+ is adjusted These results demonstrate that LGBO:Tb 3+ , Eu 3+ phosphors have potential use in light-emitting diodes.

Preparation of corn starch-g-polystyrene copolymer in ionic liquid: 1-Ethyl-3-methylimidazolium acetate

Yongjun Men,Xiyan Du,Jianan Shen,Leli Wang,Zhengping Liu

The copolymer of starch grafted with polystyrene (starch- g -PS) was synthesized with high grafting percentage by utilizing the ionic liquid 1-ethyl-3-methylimidazolium acetate ([EMIM]Ac) as solvent and potassium persulfate as initiator. The effect of various parameters upon the polymerization were studied including: initiator concentration, styrene:starch weight ratio, the reaction time and temperature. Grafting percentages were calculated using an FT-IR calibration method, with values up to 114%. The resulting copolymer was characterized using FT-IR, SEM, WAXD and TGA, which demonstrated that polystyrene side chains were evenly distributed on the starch backbone. Our results indicate that ionic liquid dissolution of starch, prior to polystyrene grafting, is a versatile methodology for the synthesis of amphiphilic, polysaccharide-based graft copolymers, having high grafting percent.

LiTi2(PO4)3@carbon/graphene hybrid as superior anode materials for aqueous lithium ion batteries

Zhi Zhou,Wei Luo,Hao Huang,Shengxiong Huang,Yongji Xia,Nan Zhou,Zhangxing He

In this paper, LiTi 2 (PO 4 ) 3 @carbon/graphene (LCG) hybrid was prepared and investigated as anode for aqueous lithium ion batteries (ALIBs). The as-prepared hybrid was characterized by XRD , SEM, TEM and TGA . The electrochemical performances of nano-structured materials as anode were evaluated by cyclic voltammetry , electrochemical impedance spectroscopy and charge-discharge tests. The cell using LCG as anode exhibits excellent cycling performance both at relatively low and high rates. The capacity retention of LCG can remain 87.6% at 0.2   C after 200 cycles and 77.2% at 5   C after 1000 cycles compared with LiTi 2 (PO 4 ) 3 @carbon (0.2   C: 71.8%, 5   C: 58.1%). Moreover, LCG reveals superior rate capability with 80.8   mA   h   g −1 , 62.1   mA   h   g −1 at 10   C and 20   C, respectively. The outstanding electrochemical performance of LCG comes from the improved electrical conductivity and the forming of efficient conductive network. The results demonstrate that the graphene-modified LiTi 2 (PO 4 ) 3 @carbon is a promising anode for ALIBs.