JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 48
·21853-21868
·
IF 4.682
Yang Hongzhi,He Tianpei,Wu Yaohui,Luo Jinhua,Zhang Aihua,Chen Xiaoyong,Zeng Yelin,Wang Yonghong,Zhao Yunlin,Wang Guangjun
A novel PbMoO 4 @MBC (MBL-2) magnetic heterojunction photocatalyst was prepared by the successful loading of Fe 3 O 4 with PbMoO 4 onto the highly conductive BC surface through the integration of co-precipitation and pyrolysis. Using advanced characterization methods could reveal the composition, morphology, and optoelectronic properties of the material. The results showed that using BC as the electron transfer interface provided a pathway for charge transfer between Fe 3 O 4 and PbMoO 4 , and importantly, the PbMoO 4 @MBC (MBL-2) nanocomposite had a large specific surface area, excellent magnetic response, high light absorption capacity for efficient carrier separation, and thus the photocatalytic activity was high. The degradation rate of MBL-2 for TC under visible light was as high as 89%. More importantly, PbMoO 4 @MBC (MBL-2) possessed good stability and reusability. The Z-scheme electron transfer pathway for improved photocatalytic performance was proposed by radical capture experiments and electron spin resonance (ESR) measurement analysis. Graphical abstract
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高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 153
·期 4
·1120-1129
·
IF 2.936
Wang Hongkang,Chai Shanshan,Li Panpan,Yang Yijun,Wang Xi
Propane dehydrogenation to propylene, one of the most significant compounds in the chemical industry, has attracted tremendous attention worldwide. A series of V doped graphitic carbon nitride composites (V-g-C 3 N 4 ) were synthesized via a combination of thermal polymerization of urea and thermal decomposition of NH 4 VO 3 . After doping VO x species, the V doped g-C 3 N 4 catalysts achieved an optimal propylene yield of 16.16% with a propylene selectivity of 68.6% at 600 °C, compared with undoped g-C 3 N 4 (a propylene yield of 5.42% with a propylene selectivity of 53.9%) at the same condition. Subsequently, various characterization techniques, including XRD, TEM, FTIR, Raman, XPS, N 2 adsorption–desorption, etc., were unitized to investigate the chemical properties and crystalline structures of the prepared catalysts. The essence of catalytic enhancement, such as crystallinity, the main active VO x species, and the newly emerging V–N bonds in V-g-C 3 N 4 catalysts, has been discussed, providing a tentative reaction pathway for CH 3 (*CH)CH 3 and CH 3 CHCH 2 * species on V active sites. In general, this work offers a research basis for the bran-new materials design for propane dehydrogenation. Graphical Abstract
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 10
·8838-8846
·
IF 2.324
Zhang Hailiang,Yuan Shuai,Qiu Zhiwen,Jiang Yanan,Zhu Xiaomeng,Wan Xingxing,Cao Bingqiang
Copper iodide (CuI) thin film grown by a direct vacuum thermal evaporation method at low temperature is utilized as inorganic hole transport layer in planar CH 3 NH 3 PbI 3−x Cl x -based perovskite solar cell. The device performance is mainly controlled by the deposition rate of CuI layer for optimized thickness. The reason was investigated in detail by transient photovoltage/photocurrent spectroscopy (TPV/TPC), X-ray photoelectron spectroscopy (XPS), and the energy-dispersive X-ray spectrum (EDS). The results indicate that larger deposition rate leads to a non-stoichiometric CuI layer with excess iodine. More importantly, the redundant iodine is illustrated as the recombination center that results in interface recombination. Under optimized CuI growth condition, a power conversion efficiency of 6.4% has been achieved with a short-circuit current density (J SC ) of 16.4 mA/cm 2 , an open-circuit voltage (V OC ) of 730 mV, and a fill factor (FF) of 54%. Our results open a possibility for further improvement of perovskite solar cells by controlling the concentration and distribution of iodine in the perovskite films.
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高影响因子
MEDICINAL CHEMISTRY RESEARCH
·
2022
·Vol. 31
·期 6
·936-948
·
IF 2.351
Hu Shijia,Li Yunqi,Kan Weiqiong,Ding Tingting,Gu Haijun,Zhang Ting,Yi Zhengfang,Chen Yihua
A series of diphenyl- N -heteroaromatic compounds were designed, synthesized, and evaluated for anticancer efficacies (antimigration and antiproliferation) against human cancer cell lines. The favorable 2 H -1,2,3-triazole compound 4a was optimized, leading to the discovery of compounds 4b and 4c with more potent antimigratory and antiproliferative activities. The transwell assay showed that compounds 4b and 4c dose-independently inhibited the migration of the two cancer cell lines (human breast cancer cell line MDA-MB-231 and pancreatic cancer cell line PANC1) with the low IC 50 values of 0.24 and 0.47 µM, respectively. The sulforhodamine-B (SRB) assay showed that compounds 4b and 4c inhibited the proliferation of PANC1 cells with the IC 50 values 0.86 µM and 1.41 µM, respectively. These results indicate that compounds 4b and 4c with 1,2,3-triazole scaffold may be further developed as potent anticancer agents in the future.
A series of novel diphenyl- N -heteroaromatics based on our previous published research work were synthesized and evaluated for their antimigration efficacies against MDA-MB-231 and PANC1 human cancer cell lines. Compound 4c dose-independently inhibited the migration of the two cancer cell lines (MDA-MB-231 and PANC1) with low IC 50 values 0.32 µM and 0.24 µM respectively.
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高影响因子
Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 10
·1530-1541
·
IF 11.534
Zhang Chang,Hu Xiangchen,Nie Zhiwei,Wu Cong,Zheng Nan,Chen Shaojie,Yang Yihang,Wei Ran,Yu Jiameng,Yang Nan,Yu Yi,Liu Wei
Garnet-type oxide is one of the most promising solid-state electrolytes (SSEs) for solid-state lithium-metal batteries (SSLMBs). However, the Li dendrite formation in garnet oxides obstructs the further development of the SSLMBs seriously. Here, we report a high-performance garnet oxide by using AlN as a sintering additive and Li as an anode interface layer. AlN with high thermal conductivity can promote the sintering activity of the garnet oxides, resulting in larger particle size and higher relative density. Moreover, Li 3 N with high ionic conductivity formed at grain boundaries and interface can also improve Li-ion transport kinetics. As a result, the garnet oxide electrolytes with AlN show enhanced thermal conductivity, improved ionic conductivity, reduced electronic conductivity, and increased critical current density (CCD), compared with the counterpart using Al 2 O 3 sintering aid. In addition, Li symmetric cells and Li∣LiFePO 4 (Li∣LFP) half cells using the garnet electrolyte with the AlN additive exhibit good electrochemical performances. This work provides a simple and effective strategy for high-performance SSEs.
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高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 9
·1-10
·
IF 6.232
Li Zi-Ling,Zhang Zi-Yang,Zhao Teng-Wen,Meng Chun-Yan,Zhang Qian-Ying,Wang Man-Man
A novel zeolite imidazole framework@hydroxyapatite composite (ZIF-8@HAP) was constructed via in-situ growth and developed for efficient dispersive solid-phase extraction (DSPE) of three benzodiazepines from urine samples. The prepared composite was characterized by scanning electron microscopy, energy-dispersive spectrometer, Fourier-transform infrared spectrometry, X-ray diffractometry, zeta potential analyzer, and nitrogen adsorption-desorption experiment. Characterization results showed typical dodecahedron ZIF-8 crystals that were uniformly located on the surface of rod-like HAP. The combination of ZIF-8 and HAP made the surface area significantly enhanced from 4.68 to 205.44 m 2 g −1 . Compared with a commercial C 18 adsorbent, ZIF-8@HAP exhibited superior removal performance for interfering components from urine and offered better extraction properties for the analytes. The prepared ZIF-8@HAP was applied as an adsorbent in DSPE, and the main experimental parameters, including pH and ionic strength of solution, adsorbent amount, adsorption time, elution solvent, and volume, were investigated. Under optimal conditions, the adsorption for 250 ng mL −1 of each analyte in 4 mL of urine was accomplished within 2 min using 60 mg of adsorbent. The method of ZIF-8@HAP–based DSPE followed by high-performance liquid chromatography gave enhancement factors of 13.3–15.3, linear ranges of 2.5–500 ng mL −1 , and limits of detection ( S/N = 3) of 0.7–1.4 ng mL −1 . The relative recoveries at three spiked levels ranged from 88.7 - 102% with intra-day and inter-day precisions from 3.0 - 10.3% and 2.3 - 12.3%, respectively. These results indicated that the proposed strategy had promising applicability for convenient, rapid, and efficient determination of benzodiazepines in urine samples. Graphical abstract In-situ fabrication of ZIF-8@HAP composite for dispersive solid-phase extraction of benzodiazepines in urine samples.
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PubMed
高影响因子
Microbiome
·
2017
·Vol. 5
·期 1
·1-18
·
IF 8.496
Hill Cian J.,Lynch Denise B.,Murphy Kiera,Ulaszewska Marynka,Jeffery Ian B.,O’Shea Carol Anne,Watkins Claire,Dempsey Eugene,Mattivi Fulvio,Tuohy Kieran,Ross R. Paul,Ryan C. Anthony,O’ Toole Paul W.,Stanton Catherine
Background The gut is the most extensively studied niche of the human microbiome. The aim of this study was to characterise the initial gut microbiota development of a cohort of breastfed infants ( n = 192) from 1 to 24 weeks of age. Methods V4-V5 region 16S rRNA amplicon Illumina sequencing and, in parallel, bacteriological culture. The metabolomic profile of infant urine at 4 weeks of age was also examined by LC-MS. Results Full-term (FT), spontaneous vaginally delivered (SVD) infants’ microbiota remained stable at both phylum and genus levels during the 24-week period examined. FT Caesarean section (CS) infants displayed an increased faecal abundance of Firmicutes ( p < 0.01) and lower abundance of Actinobacteria ( p < 0.001) after the first week of life compared to FT-SVD infants. FT-CS infants gradually progressed to harbouring a microbiota closely resembling FT-SVD (which remained stable) by week 8 of life, which was maintained at week 24. The gut microbiota of preterm (PT) infants displayed a significantly greater abundance of Proteobacteria compared to FT infants ( p < 0.001) at week 1. Metabolomic analysis of urine at week 4 indicated PT-CS infants have a functionally different metabolite profile than FT (both CS and SVD) infants. Co-inertia analysis showed co-variation between the urine metabolome and the faecal microbiota of the infants. Tryptophan and tyrosine metabolic pathways, as well as fatty acid and bile acid metabolism, were found to be affected by delivery mode and gestational age. Conclusions These findings confirm that mode of delivery and gestational age both have significant effects on early neonatal microbiota composition. There is also a significant difference between the metabolite profile of FT and PT infants. Prolonged breastfeeding was shown to have a significant effect on the microbiota composition of FT-CS infants at 24 weeks of age, but interestingly not on that of FT-SVD infants. Twins had more similar microbiota to one another than between two random infants, reflecting the influence of similarities in both host genetics and the environment on the microbiota.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 16
·11595-11606
·
IF 2.993
Wu Keliang,Dong Xuejun,Zhu Junfang,Wu Pengcheng,Liu Chang,Wang Yixi,Wu Jianning,Hou Juan,Liu Zhiyong,Guo Xuhong
The nanostructured heterojunction photocatalysts are considered promising in photocatalytic reduction in the carbon dioxide. Herein, we demonstrate a simple sol–gel and hydrolysis process to design nanostructured TiO 2 /ZnO heterojunction, by using the biological template celery stalk. The nanostructured photocatalyst consists of anatase TiO 2 and wurtzite ZnO nanoparticles. A well-connected heterojunction, with uniformly distributed nanoparticles, on the pores and folds of celery stems, is obtained. The enhanced specific surface area of 55.5 m 2 /g is achieved. The crystal structure, morphology and surface composition are investigated by electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. Furthermore, we demonstrate the photocatalytic performance of as-synthesized nanostructure TiO 2 /ZnO heterojunction. The photocatalytic yield, of CO 2 reduction into CH 4 , exhibits a five times increase, from 0.55 to 2.56 µmol h −1 g −1 , for the nanocomposite as compared to the pure TiO 2 . This enhanced performance corresponds to the efficient charge transfer and hindrance in the recombination of electron–hole pairs due to the optimum band positions of ZnO and TiO 2 . This study demonstrates the potential of using biotemplates to design efficient photocatalysts to convert CO 2 into useful solar fuels.
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2018
·Vol. 34
·期 4
·536-540
·
IF 1.248
Xue Longqi,Feng Yusha,Song Yan,Wang Rui,Liu Dahai,Du Jianshi,Yang Qingbiao,Li Yaoxian
A novel water-soluble hybrid fluorescein-coumarin dye(FLNC) fluorescence ratiometric probe to recognize OCl − was designed and synthesized. The most prominent feature of the probe is that the molecular structure contains two different fluorophores, and the fluorescein moiety was connected to coumarin moiety by diacylhydrazine linker. When OCl − was added, the two fluorophores in the FLNC probe could have a rapid respond simultaneously, with high selectivity and sensitivity towards OCl – among other reactive oxygen species/reactive nitrogen species(ROS/RNS) and anions, and the detection limit was measured to be 0.30 μmol/L. In addition, the color changes of the solution could be observed by the naked eye and have a short response time(completed within 1 min), which suggestes that the probe FLNC has the potential to be used for real-time detection.
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高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2009
·Vol. 13
·期 2
·155-158
·
IF 0.886
Zhang Jiaoxia,Zheng Yaping,Yu Peiying,He Lin,Wang Huining,Wang Rumin
A trimeric quaternary ammonium salt surfactant containing polyoxyethylene chains was synthesized from fatty alcohol polyoxyethylene ether, pentamethyldiethylenetriamine and thionyl chloride by a two-step process. Its chemical structure was characterized, and the surface activity in aqueous solution was studied at different temperatures. The results showed that when the concentration attains the CMC (1.0 mmol/L), the surface tension is 38.9 mN m −1 and the conductivity is 105.3μS cm −1 at 25 °C. These show that the trimeric quaternary ammonium salt surfactant containing polyoxyethylene chains exhibits high surface activity and effectively reduces the surface tension of water.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 27
·13097-13108
·
IF 4.682
Feng Peiyuan,Wang Xiwen,Yang Jin
Cellulose-based aerogels have become a great potential for oil absorption applications due to their wide range of sources, low density, and good adsorption properties. However, many reported cellulose-based aerogels to have the drawbacks of low oil recovery rate and poor mechanical, which limit their application. In this study, high reusable and excellent mechanical properties silylated TEMPO-oxidized nanofibers/polyvinyl alcohol aerogels (STPA) were fabricated through a three-step process of aqueous silylation, bidirectional freezing, and freeze-drying. A bidirectional freezing technique was employed to obtain two unique structural aerogels by adjusting the methyltrimethoxysilane concentration. The STPA possessed many excellent physical properties, such as ultralight (9.79 mg/cm3), hydrophobicity (136°), and compressibility; as an adsorbent, STPA showed high adsorption capacity (51–111 g/g) for various types of organic solvents. Furthermore, the excellent compressibility enables STPA fast and highly efficient recovery of the absorbed oil by simple mechanical squeeze. It possesses an excellent oil recovery rate of 80% and maintains around 90% of its initial saturated absorption capacity after 50 cycles of absorption–squeezing. Therefore, the successful microstructure design of the biomass-aerogel through bidirectional freezing could provide new thoughts for the design of multifunctional oil absorbents and STPA with good mechanical properties and reusability showing promising prospects in the field of water treatment. Graphical abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 33
·期 3
·1183-1191
·
IF 2.478
Dong Yanchen,Peng Haiyi,Xue Yulei,Xing Jianping,Gu Zhongyuan,Yao Xiaogang,Lin Huixing
Polyphenylene oxide (PPO)-based microwave composite substrates filled with different volume fractions (10, 20, 30, 40, 50 vol%) of MgTiO 3 -Ca 0.7 La 0.2 TiO 3 (MTCLT) ceramics were prepared by injection-molding process. The microstructure, thermal, mechanical, and dielectric properties of the PPO/MTCLT substrates were fully studied. The results showed that PPO/MTCLT substrates with dense microstructure and uniform filler distribution were obtained when the filler fraction didn’t exceed 30vol%. Further increase of the filler fraction brought about agglomeration of ceramics and weakened interfacial bonding, producing more pores in the substrates. With increasing volume fraction of ceramics, the coefficient of thermal expansion (CTE) of the substrates decreased significantly, while the bending strength increased first and then decreased, reaching a maximum at 30 vol%. Moreover, the dielectric constant of the substrates increased remarkably, while the dissipation factor decreased first and then increased. Increasing the testing frequency had little effect on the dielectric constant but increased the dissipation factor gradually. PPO/MTCLT composite substrate with filler fraction near 30 vol% exhibited the best performance and was used to fabricate a microstrip antenna. The antenna showed good performance with antenna gain over 3.54 dB and low axial ratio below 1.24 dB. The PPO/MTCLT microwave composite substrates prepared by injection-molding process exhibited good comprehensive properties, being important candidates for microwave and millimeter-wave applications.
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高影响因子
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