JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 7
·1-12
·
IF 2.8
Zhang Xinle,Chi Qingguo,Tang Chao,Li Hua,Zhang Changhai,Li Zhonghua,Zhang Tiandong
The rapidly growing third-generation wide-band-gap semiconductor electronic device industry urgently requires high-temperature-resistant packaging materials. However, the epoxy molding compound materials cannot suffer the high-temperature working condition due to the intrinsic molecular chain structure of epoxy materials (EP). In this paper, bisphenol A-type cyanate (BADCy) with triazine ring structure was introduced into EP to improve its heat resistance. The curing reaction as well as the curing mechanism has been clearly revealed for BADCy/EP with different contents of BADCy according to the Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimeter (DSC) results. In the whole copolymer system, the copolymer at higher BADCy concentration (50–60 mol%) achieved the highest crosslink density (12.8 × 10 –3 mol/cm 3 ), thus, showing excellent glass transition temperature (> 200 °C) and thermal decomposition temperature( T 5% > 400 °C). The heat resistance and electrical insulation property of BADCy/EP system have been systematically investigated, and a balance between high heat resistance and good electrical insulation are achieved at 66 mol% BADCy content, where the glass transition temperature reaches 215 °C, which is 73 °C higher than that of the EP system of anhydride copolymer. The volume resistivity of 1.5 × 10 15 Ω·m and dielectric constant of 3.3 is obtained, indicating excellent electrical insulation and dielectric properties of BADCy/EP. This work provides a facile and efficient strategy to improve the overall properties of EP by optimizing the molecular chain structure.
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CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
·
2023
·Vol. 59
·期 1
·192-201
·
IF 0.6
Tang Yajuan,Wang Hongmei,Gao Shanshan,Han Dan,Du Jinxiu,Wang Rui,Liu Yikun,Qu Guohui
The use of highly mineralized reinjection water has low gel strength and poor stability, and the above problems are more prominent under high-temperature reservoir conditions. Based on the temperature resistance and salt tolerance polymer TSRP and phenolic resin crosslinking agent, a TSRP temperature resistant weak gel system suitable for high mineralized reinjection water was developed, and the temperature resistance mechanism of the TSRP weak gel system was tested by its temperature resistance and injection ability. The migration, retention, and plugging of the TSRP weak gel system in heterogeneous reservoirs were studied through micropore throat migration and plugging characteristics and dual-pipe parallel oil displacement experiments. The results showed that: under the condition of polymer concentration 2000 mg/L, polymer: crosslinking agent: glue promoter 1:1.5:1, the TSRP weak gel system prepared by using mineralized 12132.9 mg/L reinjection water can remain stable after 95°C aging at high temperature of TSRP. Through microscopic simulation, a glass etching model TSRP weak gel system showed good migration ability and plugging performance. In comparison with the two pipes parallel oil displacement experiment, the KY gel system injected the same amount of PV at 95°C and 20000 mg/L in the Y1L block, the average recovery of the TSRP gel system increased by 22.3% after injection of polymer gel, and the KY gel system was only 18.2%; When the same amount of PV was injected in Z1L block, 95°C and 22000 mg/L, the average recovery of TSRP gel system increased by 24.35% after injection of polymer gel, and the KY gel system was only 17.15%, that is, under higher salinity, the TSRP gel system showed better performance.
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ANALYTICAL SCIENCES
·
2023
·Vol. 39
·期 7
·1151-1161
·
IF 1.6
Zhang Zhihui,Zhang Jingyu,Li Mufei,Jin Xiangzi,Yao Liping,Wang Wenyuan,Liu Jinsong,Li Zuguang
This work first proposed a novel green and efficient method based on Quick, Easy, Cheap, Efficient, Rugged, and Safe pretreatment (QuEChERS) combined with switchable hydrophilic solvent homogeneous liquid–liquid microextraction (SHS-HLLME) for trace determination of triazole fungicides (TFs) in agricultural products such as vegetables and fruits by gas chromatography–mass spectrometry (GC–MS). N , N -Dimethyl benzylamine was used for the synthesis of SHS. Box–Behnken design was applied for the optimization of extraction conditions and a mathematical model was obtained. Ultimately, 0.50 mL SHS, 1.0 mL 10 mol L −1 sodium hydroxide, and 45 s ultrasonic time were determined as optimal conditions for the SHS-HLLME method. The limit of detection and limit of quantification determined using the optimal method (SHS-HLLME/GC–MS) were 0.13–0.27 ng mL −1 and 0.43–0.90 ng mL −1 , respectively. In addition, the SHS-HLLME method under optimal conditions was combined with the traditional QuEChERS method to realize the advancement of the SHS-HLLME method from simple to complex matrix analysis, and the QuEChERS–SHS-HLLME method was successfully applied to the analysis of TFs in cucumbers, tomatoes, watermelon and grapes in agricultural products. Matrix-matched calibration standards were used to improve the accuracy of TFs in spiked cucumber samples to obtain recovery results close to 100%. It was shown that the new method is green and rapid, enabling fast and inexpensive sample pretreatment with up to 100-fold enrichment factor and low detection limit compared with the original QuEChERS method. Graphical abstract
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IONICS
·
2023
·Vol. 29
·期 8
·3373-3384
·
IF 2.8
Wan Xiuying,Zhao Mengyuan,Li Fang,Zhu Gan,Zhao Hongyuan
Herein, we reported a novel niclosamide (NA) electrochemical sensor based on the multifunctional nanocomposite of palygorskite (Pal) nanofibers and bifunctional multiwalled carbon nanotubes (BMCN) with graphitization and carboxylation. For the BMCN@Pal nanocomposite, BMCN with one-dimensional nanotube structure possessed excellent electrical conductivity and good dispersion performance due to the graphitization and carboxylation; Pal with fibrous structure possessed good electrocatalytic activity due to the high absorption capability, large specific surface area, and prominent stability. Moreover, BMCN with interconnected carbon conductive network promoted the uniform distribution of Pal nanofibers and compensated for the poor electrical conductivity of Pal nanofibers. Thanks to the functional combination of BMCN and Pal, the BMCN@Pal/GCE sensor exhibited good NA electrochemical detection performance with low limit of detection of 7.88 nM in linear NA concentration of 0.01–10 μM. The BMCN@Pal/GCE sensor exhibited good repeatability and reproducibility. In addition, a good practical feasibility can be achieved at the BMCN@Pal/GCE sensor for the detection of NA in tap water and pond water samples (recovery rate: 96.2–100.3%, relative standard deviation: 2.53–4.97).
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Tungsten
·
2023
·Vol. 5
·期 4
·589-597
·
IF 6.6
Ma Ming-Yue,Yu Han-Zhi,Deng Li-Ming,Wang Lu-Qi,Liu Shu-Yi,Pan Hui,Ren Jian-Wei,Maximov Maxim Yu.,Hu Feng,Peng Sheng-Jie
Constructing hetero-structured catalyst is promising but still challenging to achieve overall water splitting for hydrogen production with high efficiency. Herein, we developed a sulfide-based MoS 2 /Co 1− x S@C hetero-structure for highly efficient electrochemical hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The carbon derived from the filter paper acts as a conducting carrier to ensure adequate exposure of the active sites guaranteed with improved catalytic stability. The unique hierarchical nano-sheets facilitate the charge and ion transfer by shortening the diffusion path during electro-catalysis. Meanwhile, the robust hetero-interfaces in MoS 2 /Co 1− x S@C can expose rich electrochemical active sites and facilitate the charge transfer, which further cooperates synergistically toward electro-catalytic reactions. Consequently, the optimal MoS 2 /Co 1− x S@C hetero-structures present small over-potentials toward HER (135 mV @ 10 mA·cm −2 ) and OER (230 mV @ 10 mA·cm −2 ). The MoS 2 /Co 1− x S@C electrolyzer requires an ultralow voltage of 1.6 V at the current density of 10 mA·cm −2 with excellent durability, outperforming the state-of-the-art electro-catalysts. This work sheds light on the design of the hetero-structured catalysts with interfacial engineering toward large-scale water splitting.
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Nature Energy
·
2023
·Vol. 8
·期 5
·526-535
·
IF 56.7
Zhou Jiazheng,Xu Xiao,Wu Huijue,Wang Jinlin,Lou Licheng,Yin Kang,Gong Yuancai,Shi Jiangjian,Luo Yanhong,Li Dongmei,Xin Hao,Meng Qingbo
The control of the phase evolution during the selenization of kesterite Cu 2 ZnSn(S,Se) 4 (CZTSSe) is crucial for efficient solar cells. Here, we regulate the phase-evolution kinetics of Ag-alloyed CZTSSe by applying a positive pressure in the reaction chamber at the initial stage of the annealing process. The partial pressure of Se decreases, reducing the collision probability between selenium molecules and the kesterite precursor during the initial formation of the crystals. This results in the precursor transforming into CZTSSe in a single step, without the formation of secondary phases. CZTSSe forms at relatively higher temperature than conventional methods, leading to high-crystallinity kesterite films with fewer defects. We demonstrate solar cells with a total area efficiency of 14.1% and a certified total area efficiency of 13.8%. This work provides insights into the selenization mechanism and phase evolution of kesterite absorbers, enabling efficient solar cells.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-19
·
IF 10.2
Wang Xueqian,Dai Geyang,Jiang Guiying,Zhang Danya,Wang Ling,Zhang Wen,Chen Huang,Cheng Teng,Zhou Ying,Wei Xiao,Li Fei,Ma Ding,Tan Songwei,Wei Rui,Xi Ling
Background TMVP1 is a novel tumor targeting polypeptide screened by our laboratory with a core sequence of five amino acids LARGR. It specially binds to vascular endothelial growth factor receptor-3 (VEGFR-3), which is mainly expressed on neo-lymphatic vessels in sentinel lymph node (SLN) with tumor metastasis in adults. Here, we prepared a targeted nanoprobe using TMVP1-modified nanomaterials for tumor metastasis SLN imaging.Results In this study, TMVP1-modified polymer nanomaterials were loaded with the near-infrared (NIR) fluorescent dye, indocyanine green (ICG), to prepare a molecular imaging TMVP1-ICG nanoparticles (NPs) to identify tumor metastasis in SLN at molecular level. TMVP1-ICG-NPs were successfully prepared using the nano-precipitation method. The particle diameter, morphology, drug encapsulation efficiency, UV absorption spectrum, cytotoxicity, safety, and pharmacokinetic properties were determined. The TMVP1-ICG-NPs had a diameter of approximately 130 nm and an ICG loading rate of 70%. In vitro cell experiments and in vivo mouse experiments confirmed that TMVP1-ICG-NPs have good targeting ability to tumors in situ and to SLN with tumor metastasis by binding to VEGFR-3. Effective photothermal therapy (PTT) with TMVP1-ICG-NPs was confirmed in vitro and in vivo. As expected, TMVP1-ICG-NPs improved ICG blood stability, targeted tumor metastasis to SLN, and enhanced PTT/photodynamic (PDT) therapy, without obvious cytotoxicity, making it a promising theranostic nanomedicine.Conclusion TMVP1-ICG-NPs identified SLN with tumor metastasis and were used to perform imaging-guided PTT, which makes it a promising strategy for providing real-time NIR fluorescence imaging and intraoperative PTT for patients with SLN metastasis.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 21
·61018-61031
·
IF 5.8
He Miaolu,Feng Leihao,Cui Qi,Li Yushuang,Wang Jiaqi,Zhu Jiani,Wang Lei,Wang Xudong,Miao Rui
Metal–organic frameworks (MOFs) can be applied to enhance the property of forward osmosis membranes. However, organic solvents can easily remain in organic synthetic metal–organic frame materials and cause membrane fouling and a decrease in membrane permeability. In this study, water-based Zr-fumarate MOFs were synthesized and doped into the membrane active layer by interfacial polymerization to provide a water-based MOF-doped thin-film composite membrane (TFC membrane). It was found that doping the water-based MOFs effectively improved membrane hydrophilicity, and nanowater passages were introduced in the active layer to improve permeability. The water flux of the water-based MOF-doped TFC membranes was increased by 21% over that of the original membrane, and the selectivity performance of the membrane was improved while keeping the salt rejection basically unchanged. Additionally, the water-based MOF-doped TFC membrane showed good removal efficiency ( R d > 94%) and strong antipollution performance in the treatment of dye pollutants.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 13
·5808-5821
·
IF 4.5
Wu Wei,Wang Yueming,Sun Jiyu
Color changing can immediately activate system of vision, which bring corresponding monitoring function without delay. Traditional color-changing sensor is not competent for the detection of large area, low-cost and easy preparing. Inspired by adaptive coloring strategies of beetle elytra, angle dependent and humidity responsive color-changing films are achieved with large area through convenient and low-cost technics of spin-coating and self-leveling. When observed at different angles, L 2B , L 2P and L 3G acquired with NPAM and HEMA-co-MMA layers can bring color-changing expect L 3P . And L 3G also conducts humidity responsive color-changing with stability from green to purple in variation from 46%rh to 84%rh and reversibly changing from purple to green while from high to low humidity, which ascribed to transformation between dehydration and hydration of NPAM layer with hydrophilic groups. To characterize the durability and stability in microscale, nano-indentation technology was used to reveal the nanomechanical properties of cross-link networks for NPAM and HEMA-co-MMA films. It was found out that the hydrophilic groups of networks can carry hydrogen bonds to enhance cross-link characteristic and low separation performance. This research provides insights into the simple and efficient technology for preparing functional material that displays potential applications in industrial, agricultural and military fields. Graphical Abstract
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Nano Research
·
2023
·Vol. 16
·期 7
·10131-10138
·
IF 9.9
Wang Yawen,Gao Heng,Liu Yuanlan,Li Dong,Zhao Bo,Liang Wenkai,Sun Yinghui,Jiang Lin
Al nanoparticles (NPs) exhibit excellent localized surface plasmon resonance (LSPR) properties and have been considered a promising alternative to plasmonic Au or Ag NPs. However, it remains difficult to fabricate Al NPs with uniform size and controllable morphology over a large area on substrates, which seriously hinders the in-depth exploration of their properties and applications. Herein, we have developed a self-assembly nanoparticle template method to realize the controllable preparation of bowl-shaped Al NPs (Al nanobowls (Al NBs)) with tunable sizes from 36 to 131 nm on the substrate surface, accompanied by tunable LSPR spectral responses from 272 to 480 nm. Among them, 131 nm Al NBs exhibit superior fluorescence enhancement ability (1932.2-fold) and a low detection limit (78.6 pM) towards 5-carboxyfluorescein, exceeding comparable Ag NBs and Au nanospheres (NSs). This can be attributed to the strong electromagnetic enhancement induced by the LSPR effect and the effective inhibition of fluorescence quenching caused by the self-passivated oxide layer. Therefore, the successful fabrication of Al NBs on substrates is of vital significance for their promising applications, including surface-enhanced spectroscopy, sensitive fluorescence detection, light-harvesting devices, biosensing, and ultraviolet (UV) plasmonics.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2023
·Vol. 40
·期 9
·2149-2158
·
IF 2.7
Li Chengfeng,Lyu Qishen,Li Zheng,Yang Shuliang,Sun Yong,Tang Xing,Zeng Xianhai,Lin Lu
The hydrogenation of biomass-based furan compounds is an important step for the catalytic valorization of biobased chemicals. In this work, Ru-based catalysts supported on different supports, such as HY, MgO and Amberlyst-15, were prepared and estimated for the hydrogenation of dimethyl 2,5-furandicarboxylate (FDMC). Among them, Ru/HY provided a desirable yield of 99.4% for tetrahydrofuran-2,5-dicarboxylic acid dimethyl ester (THFDMC) under 90 °C and 3 MPa H 2 . Based on catalyst characterization, Ru/HY could offer more surface Ru 0 species and carbon radical intermediates than other catalysts, which could largely favor the activation of hydrogen and then promote the hydrogenation of FDMC over Ru/HY.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-13
·
IF 16.6
Zhang Ying,Wang Shenqiang,Yang Yinxian,Zhao Sheng,You Jiahuan,Wang Junxia,Cai Jingwei,Wang Hao,Wang Jie,Zhang Wei,Yu Jicheng,Han Chunmao,Zhang Yuqi,Gu Zhen
Effective reprogramming of chronic wound healing remains challenging due to the limited drug delivery efficacy hindered by physiological barriers, as well as the inappropriate dosing timing in distinct healing stages. Herein, a core-shell structured microneedle array patch with programmed functions (PF-MNs) is designed to dynamically modulate the wound immune microenvironment according to the varied healing phases. Specifically, PF-MNs combat multidrug-resistant bacterial biofilm at the early stage via generating reactive oxygen species (ROS) under laser irradiation. Subsequently, the ROS-sensitive MN shell gradually degrades to expose the MN core component, which neutralizes various inflammatory factors and promotes the phase transition from inflammation to proliferation. In addition, the released verteporfin inhibits scar formation by blocking Engrailed-1 ( En1 ) activation in fibroblasts. Our experiments demonstrate that PF-MNs promote scarless wound repair in mouse models of both acute and chronic wounds, and inhibit the formation of hypertrophic scar in rabbit ear models.
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