Scientific Reports
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2023
·Vol. 13
·期 1
·1-11
·
IF 4.6
You Teng-Hui,Yang Wei,Hui Hao-Hao,Lei Xiang-Yang,Wang Tian-Yu,Zhang Qing-Hua,Ju Xin,Deng Xue-Ran
The purpose of this study is to analyze the damage of antireflective (AR) coating over potassium dihydrogen phosphate (KDP) crystal subjected to multi-pulse laser irradiation at low flux under vacuum. Fresh silica AR was characterized as a reference; Atomic Force Microscope (AFM), Scanning Electron Microscopy (SEM), profilometer, and Scanning Near-Field Optical Microscope Photo-induced Force Microscope (SNOM-PiFM) were employed to analyze the characteristics of coatings. The experimental results indicated that the damage of AR coating over the KDP crystal was mainly caused by partial exfoliation, which exposed silica particles beneath the surface. It was found that the accumulated tensile stress led to coating damage with the increase of laser pulse. The initial coating damage was observed to extend and interconnect to form large-area exfoliation. Splitting mechanism of SiO–Si TO 3 was observed at vibration mode peaks of 1064 cm −1 and 1096 cm −1 showing progressing irradiation damage. Based on this study, it would be helpful to suppress the damage probability of AR coating over KDP crystal applied in high-power laser systems. Moreover, the applicability of SNOM-PiFM method to study the Infrared Radiation (IR) spectra of ultra-thin coatings with transparent substrates was proposed.
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PubMed
高影响因子
IONICS
·
2023
·Vol. 29
·期 4
·1479-1486
·
IF 2.8
Liu Yang,Chen Han,Lou Xiaoming,Wen Xiaoyu,Yin Zhenguo,Xiang Kaixiong
Rechargeable aqueous ammonium-ion batteries (AAIBs) have attracted more and more attention in energy storage devices because of great safety and cost-effectiveness, as well as excellent rate capability. Recently, it is the main exploration focus for the further improvement of AAIBs to develop suitable electrode materials. Herein, titanic acid and TiO 2 were simply synthesized by the facile co-precipitation approach. Titanic acid showed higher capacity of 104.5 mAh g −1 at the 0.1 A g −1 current density, and higher cyclability with the 91.2% capacity retention cycled 1000 cycles at 1 A g −1 . Titanic acid is promising as aqueous ammonium-ion batteries with great stability and capacity.
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CHEMICAL PAPERS
·
2023
·Vol. 77
·期 6
·3347-3359
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IF 2.2
Wang Chaozhi,Li Hualin,Huang Zhenhong,Ding Zhu,He Zonglin,Liu Baohua,Ai Jiaoyan,Song Lina
The subject of this study was the application of a novel CO 2 -based low-molecular weight poly (propylene carbonate) diol (PPCD) in the field of adhesive. Two-component polyurethane adhesive (PPCD-PU) was prepared with PPCD and polymethylene polyphenyl polyisocyanate (PAPI) as raw materials, propylene carbonate diol (PCD-EDA) as extender. The effects of the molecular weight, carbonate linkage content of PPCD and content of PCD-EDA on the properties of PPCD-PU were also investigated. The results showed that the novel CO 2 -based low-molecular weight poly (propylene carbonate) diol had higher carbonate linkage content (35%). The PPCD-PU synthesized by the PPCD had good adhesion performance, and the lap shear strength reached to 15 MPa. The addition of PCD-EDA not only improved the bonding properties of the adhesive, but also made PPCD-PU adhesive achieved higher lap shear strength in a shorter curing time. When the amount of PCD-EDA was 20 wt.%, the lap shear strength increased to 17 MPa, and the lap shear strength increased significantly from 3.7 to 10.6 MPa after curing at 80 °C for 30 min. Water absorption rate of PPCD-PU film was about 1.7%, and the lap shear strength was almost unchanged after 24 h of immersion in water. The temperature of 5%-weight loss of PPCD-PU was 284 °C, and the glass transition temperature was 79.3 °C. All the polyurethane adhesives obtained performed good heat and water resistance.
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Tungsten
·
2023
·
IF 6.6
Yang Meng-Le,Jin Zhong-Xin,Cao Xi-Xian,Wang Xin-Ming,Ma Hui-Yuan,Pang Hai-Jun,Yang Gui-Xin
Accelerating the breaking of the nitrogen nonpolar bond (N≡N) is an important factor to improve the efficiency of the electro-catalytic nitrogen reduction reaction (e-NRR). In this work, polyoxometalates-derived FeMo-based ternary oxide materials MoO 2 -Mo 4 O 11 -FeMoO 4 @ X (abbreviated as MoFeO@ X , X represents the synthesis temperature of 650, 750 and 850 °C) were designed and synthesized for e-NRR under ambient conditions. The scanning electron microscopy images of MoFeO@750 show an ellipsoidal-like structure (0.86 × 0.6 μm). The relatively large specific surface area, formation of multiple interfaces, together with the synergistic effect of iron and molybdenum bimetals, would make MoFeO@ X catalyst more easily absorb and activate N 2 in the e-NRR. Expectedly, the synthesized MoFeO@750 shows an optimal NH 3 production rate of 16.57 μg·h −1 ·mg cat. −1 and Faradaic efficiency of 12.33% at − 0.3 V versus reversible hydrogen electrode (νs. RHE), with outstanding electrochemical and structural stability.
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MEDICINAL CHEMISTRY RESEARCH
·
2023
·Vol. 32
·期 6
·1087-1097
·
IF 2.6
Chen Xi,Feng Xiaoqing,Kong Xiangming,Wang Hecheng,Liu Tianwen,Tang Long,Zhuang Ziheng
Aging is a natural process, but with the increase of people’s average life expectancy, aging has brought great economic pressure and social burden to many countries and regions. As urolithin B (UB) is a natural metabolite, it has shown positive effects in many disease studies, such as obesity, diabetes, osteoporosis, cancer, learning and memory disorders, and other diseases. This inspired researchers to further study and application of UB as a potential anti-aging drug. In this study, 13 amide derivatives of UB were designed and synthesized, and their anti-aging and biosafety were verified using Caenorhabditis elegans ( C. elegans ). C. elegans is a powerful model organism for anti-aging research. Finally, our results showed that Cpd. 11 had the best anti-aging activity among the thirteen amide derivatives, and the compound had good biosafety. Therefore, Cpd. 11 has the potential to be used as an anti-aging drug and needs to be further developed and applied. Graphical abstract
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MOLECULAR MEDICINE
·
2023
·Vol. 29
·期 1
·1-21
·
IF 5.7
Bai Tao,Li Mingxing,Liu Yuanfeng,Qiao Zhentao,Zhang Xusheng,Wang Yafeng,Wang Zhiwei
Background Diabetes-related limb ischemia is a challenge for lower extremity amputation. Aurora Kinase A (AURKA) is an essential serine/threonine kinase for mitosis, while its role in limb ischemia remains unclear. Method Human microvascular endothelial cells (HMEC-1) were cultured in high glucose (HG, 25 mmol/L d -glucose) and no additional growth factors (ND) medium to mimic diabetes and low growth factors deprivation as in vitro model. Diabetic C57BL/6 mice were induced by streptozotocin (STZ) administration. After seven days, ischemia was surgically performed by left unilateral femoral artery ligation on diabetic mice. The vector of adenovirus was utilized to overexpress AURKA in vitro and in vivo. Results In our study, HG and ND-mediated downregulation of AURKA impaired the cell cycle progression, proliferation, migration, and tube formation ability of HMEC-1, which were rescued by overexpressed AURKA. Increased expression of vascular endothelial growth factor A (VEGFA) induced by overexpressed AURKA were likely regulatory molecules that coordinate these events. Mice with AURKA overexpression exhibited improved angiogenesis in response to VEGF in Matrigel plug assay, with increased capillary density and hemoglobin content. In diabetic limb ischemia mice, AURKA overexpression rescued blood perfusion and motor deficits, accompanied by the recovery of gastrocnemius muscles observed by H&E staining and positive Desmin staining. Moreover, AURKA overexpression rescued diabetes-related impairment of angiogenesis, arteriogenesis, and functional recovery in the ischemic limb. Signal pathway results revealed that VEGFR2/PI3K/AKT pathway might be involved in AURKA triggered angiogenesis procedure. In addition, AURKA overexpression impeded oxidative stress and subsequent following lipid peroxidation both in vitro and in vivo, indicating another protective mechanism of AURKA function in diabetic limb ischemia. The changes in lipid peroxidation biomarkers (lipid ROS, GPX4, SLC7A11, ALOX5, and ASLC4) in in vitro and in vivo were suggestive of the possible involvement of ferroptosis and interaction between AUKRA and ferroptosis in diabetic limb ischemia, which need further investigation. Conclusions These results implicated a potent role of AURKA in diabetes-related impairment of ischemia-mediated angiogenesis and implied a potential therapeutic target for ischemic diseases of diabetes.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2023
·Vol. 148
·期 13
·6133-6150
·
IF 4.4
Zhao Jihe,Hu Jiwen,Dong Yonglu,He Daguang,Gui Xuefeng,Cui Xiaohua,Tu Yuanyuan,Lin Shudong
Thermal runaway accidents have occurred mainly during storage and transportation of azo compounds because large amounts of heat were released during the course of thermal decomposition. In this study, the thermal runaway characteristics of 2,2′-azobis(2-methylbutyronitrile) (AMBN) were first comprehensively investigated via differential scanning calorimetry (DSC), accelerating rate calorimetry (ARC), and gas chromatography/mass spectrometry (GC-MS). The onset temperature ( T on ), heat of decomposition ( Q ), and adiabatic temperature rise (Δ T ad ) were determined, which were involved in the safety of storage and transportation. Corresponding thermokinetic analyses were performed using DSC and ARC data. The data obtained from the experiments and calculation were utilized to predict the self-accelerating decomposition temperature (SADT), the control temperature ( T NR ), and the emergency temperature ( T C,I ). In addition, the flammable components in the pyrolysis products of AMBN were studied, particularly mixed with incompatible materials, such as HCl, NaOH, and Fe 2 O 3 , which helped predict the risk of thermal runaway during storage and transportation. Graphical Abstract
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 6
·1493-1500
·
IF 2.5
Chang Zenghua,Mou Lisha,Shao Zechao,Ou Mei,Fan Tianchi,Li Bin,Wu Shuaijin,Wang Rennian,Wang Jiantao
Silicon as one of the most promising anode materials suffers from its low electronic conductivity and large volume changes during the lithiation/delithiation processes, resulting in a huge capacity fading upon cycling. Herein, we design a single-wall carbon nanotube (SWCNT) coating on the silicon/carbon (Si/C) electrode to improve its cycling performance. By this simple configuration, the commercial Si/C electrode delivers a high reversible capacity of 653.8 mA h g −1 at current density of 65 mA g −1 and exhibits excellent cycling stability with capacity retention 79.8% after 150 cycles. As expected, the SWCNT layer on the surface of electrode improves the electronic conductivity of the electrode and serves as a barrier layer to prevent the electrode surface from cracking and delaminating, which gives the best reversible capacity and longer life cycle. This design can eliminate much more complicated processes for providing some potential in commercial applications.
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COLLOID AND POLYMER SCIENCE
·
2023
·Vol. 301
·期 6
·655-663
·
IF 2.4
Wang Zhen,Leng Kangwei,Liu Jiuhong,Li Yueqiu,Liu Shucheng,Li Yan,Wang Zhongwei,Yu Qing,Han Yuxi
Poly(methyl methacrylate) microspheres with narrow particle size distribution were synthesized successfully under visible light (LED@420 nm) in this study, and no RAFT agent was involved. A novel acylphosphine oxide, (2,4-dimethylphenyl) phenylphosphine oxide (2,4-DMTPO), was used as the photoinitiator. Uniform microspheres with the weight-average diameter (D w ) of 1.03 μm and polydispersity index (PDI) of 1.06 were obtained upon irradiation for 30 min, when the ratio of methyl methacrylate (MMA) to solvent was 1:10, the amount of polyvinylpyrrolidone (PVP) and 2,4-DMTPO was 30 wt% and 2 wt% of MMA, respectively. However, no microspheres could be detected instead of large blocks when (2,4,6-trimethylbenzoyl) diphenylphosphine oxide (TPO) was the photoinitiator under the same condition. It could be due to the higher light absorption ability and quantum yield of 2,4-DMTPO at 420 nm than TPO. A possible formation mechanism of PMMA microspheres was proposed and the effects of photoinitiator, MMA, irradiation time, and PVP were discussed. Results shown that regular microspheres were formed when the irradiation time exceeded 30 min, and the amount of PVP was in the range of 25 to 40 wt% of MMA. Lowering the amount of photoinitiator to 0.5 wt% resulted in ca. 66% and 4% decrease of D w and PDI, respectively. This study may provide a rapid and energy saving way of synthesizing monodispersed PMMA microsphere, which would be benefit for the fields of coating, template, and so on.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 15
·6643-6655
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IF 4.5
Zhang Hengchao,Li Yarou,Zhang Yupan,Wu Junfeng,Hu Jiandong,Li Shixin,Li Lanlan
Heavy metal pollution in the environment has posed a serious threat to human health and ecosystems. Therefore, it is urgent to develop a fast and effective sensing method for detecting heavy metal ions (HMIs). A simple and rapid ultrasonic mixing method was used to prepare nanocomposites consisting of cysteine, multi-walled carbon nanotubes, and nitrogen-doped molybdenum disulfide (L-Cys/MWCNTs/N-MoS 2 ). Fully combining the excellent features of 2D materials and carbon nanomaterials, the nanocomposites have been successfully used as sensor interface materials for the simultaneous detection of lead ions (Pb 2+ ) and cadmium ions (Cd 2+ ). The L-Cys/MWCNTs/N-MoS 2 @GCE sensor has a wide linear range for the detection of Pb 2+ and Cd 2+ , with the detection limits as low as 0.67 nM and 5.3 nM, respectively. In addition, the sensor performs well in stability, reproducibility, and anti-interference performance. The L-Cys/MWCNTs/N-MoS 2 @GCE sensor can also be used for the detection of Pb 2+ and Cd 2+ in tap water and lake water with good recovery (> 90%), which may provide a promising strategy for the simultaneous in situ and sensitive detection of heavy metal ions in the aqueous environment.
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Biomass Conversion and Biorefinery
·
2023
·
IF 4
Liu Yun,Wang Xueke,Hu Mingyang,Yu Yanyan
2,5-furandicarboxylic acid (FDCA), one of the most important building blocks, has attracted tremendous concerns, and the routes for FDCA synthesis from non-edible hemicellulose are of vital importance from the views of the circular economy. Herein, a multistep process towards hemicellulose-to-FDCA conversion is proposed, including hemicellulose-to-furfural conversion and sequential oxidation to furoic acid (FA), following with cesium furoate (FA-Cs) preparation and its direct carboxylation with carbon dioxide (CO 2 ). The overall conversion yield of the targeted FDCA product towards the hemicellulose-to-FDCA pathway reaches 29.6%. Many efforts are made on the direct carboxylation reaction of FA-Cs with CO 2 using Cs 2 CO 3 as a catalyst. Results show that FDCA with 56.47% yield is achieved via direct carboxylation of FA-Cs at 290 °C for 12 h with 40 mL/min of flowing CO 2 . Different from the previous reports, it is demonstrated that drying methods of FA-Cs show significant effects on the yield and properties of the targeted FDCA product. It is found that the conventional drying method is more suitable than the vacuum drying method. From the putative reaction mechanism, the roles of CO 2 and Cs 2 CO 3 are elucidated. CO 2 plays a direct role in carboxylation reaction, and excessive Cs 2 CO 3 can deteriorate FDCA yield due to the occurrence of decomposition. Interestingly, biochar generated during carboxylation reaction is a promising potential adsorbent, which can efficiently adsorb methylene blue with a removal rate of 96% and an adsorption amount of 80 mg/g. This present work can provide an integrated strategy for both hemicellulose valorization and CO 2 utilization in future.
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ANALYTICAL SCIENCES
·
2023
·
IF 1.6
Wang Qi,Li Huaqiang,You Jinling,Yan Binjun,Jin Weifeng,Shen Menglan,Sheng Yunjie,He Bingqian,Wang Xinrui,Meng Xiongyu,Qin Luping
The quantitative analysis of near-infrared spectroscopy in traditional Chinese medicine has still deficiencies in the selection of the measured indexes. Then Paeoniae Radix Alba is one of the famous "Eight Flavors of Zhejiang" herbs, however, it lacks the pharmacodynamic support, and cannot reflect the quality of Paeoniae Radix Alba accurately and reasonably. In this study, the spectrum–effect relationship of the anti-inflammatory activity of Paeoniae Radix Alba was established. Then based on the obtained bioactive component groups, the genetic algorithm, back propagation neural network, was combined with near-infrared spectroscopy to establish calibration models for the content of the bioactive components of Paeoniae Radix Alba. Finally, three bioactive components, paeoniflorin, 1,2,3,4,6-O-pentagalloylglucose, and benzoyl paeoniflorin, were successfully obtained. Their near-infrared spectroscopy content models were also established separately, and the validation sets results showed the coefficient of determination (R 2 > 0.85), indicating that good calibration statistics were obtained for the prediction of key pharmacodynamic components. As a result, an integrated analytical method of spectrum–effect relationship combined with near-infrared spectroscopy and deep learning algorithm was first proposed to assess and control the quality of traditional Chinese medicine, which is the future development trend for the rapid inspection of traditional Chinese medicine. 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）