POLYMER BULLETIN
·
2023
·
IF 3.2
Xu Peijie,Zhou Yi,Wang Chunyuan,Cao Zhao,Cheng Hongfei
Zinc-ion batteries (ZIBs) are desirable as one of the most potential energy storage devices owing to the environmental friendliness and abundant zinc reserves. Nevertheless, numerous promising cathode materials suffer from complicated preparation processes and low electronic conductivity. Herein, a high-performance cathode material (HNTs-PPy) for ZIBs based on halloysite nanotubes (HNTs) with a polypyrrole (PPy) coating is prepared through an efficient one-step in situ polymerization. The PPy nanoparticles can be uniformly and densely coated on the external surface of HNTs with a thickness of ~ 3.8 nm. The surface valence state and banding configuration of HNTs-PPy show the diffusion of the electron cloud from the outside of the PPy to the inside of HNTs and further form a strong polycomplexation between HNTs and PPy. Compared to PPy, introducing HNTs efficiently increases the contact area between the electrolyte and the composite cathode materials and sequentially enhances the cycling stability. The ZIBs based on HNTs-PPy cathode also achieve a capacity retention of 87.4% at a current density of 0.5 A g −1 after 500 cycles. This work develops a new perspective strategy for large-scale production of time- and cost-efficient cathode materials for aqueous batteries.
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高影响因子
BIODEGRADATION
·
2023
·Vol. 34
·期 4
·371-381
·
IF 3.6
Yue Caixu,Jia Nan,Lv Xueru,Wang Shenghui
3, 5, 6-Trichloro-2-pyridinol (TCP) is a metabolite of the insecticide chlorpyrifos and the herbicide triclopyr, and it is higher toxic than the parent compounds. Microbially-mediated mineralization appears to be the primary degradative pathway and the important biological process of detoxification. However, little information is available on TCP complete metabolic pathways and mechanisms. In this study, the degradation of TCP was studied with a novel strain Micrococcus luteus ML isolated from a stable TCP degrading microbiota. Strain ML was capable of degrading 61.6% of TCP (50 mg/L) and 35.4% of chlorpyrifos (50 mg/L) at 24 h and 48 h under the optimal conditions (temperature: 35 °C; pH: 7.0), respectively. It could also degrade 3, 5-dichloro-2-pyridone, 6-chloropyridin-2-ol, 2-hydroxypyridine and phoxim when provided as sole carbon and energy sources. Seven TCP intermediate metabolites were detected in strain ML and two possible degradation pathways of TCP were proposed on the basis of LC–MS analysis. Both the hydrolytic-oxidative dechlorination pathway and the denitrification pathway might be involved in TCP biodegradation by strain ML. To the best of our knowledge, this is the first report on two different pathways responsible for TCP degradation in one strain, and this finding also provides novel information for studying the metabolic mechanism of TCP in pure culture.
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高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Li Yanxun,Huang Bo,Zhang Xuning,Ding Jianwei,Zhang Yingyu,Xiao Linge,Wang Boxin,Cheng Qian,Huang Gaosheng,Zhang Hong,Yang Yingguo,Qi Xiaoying,Zheng Qiang,Zhang Yuan,Qiu Xiaohui,Liang Minghui,Zhou Huiqiong
The stability of organic solar cells is a key issue to promote practical applications. Herein, we demonstrate that the device performance of organic solar cells is enhanced by an Ir/IrO x electron-transporting layer, benefiting from its suitable work function and heterogeneous distribution of surface energy in nanoscale. Notably, the champion Ir/IrO x -based devices exhibit superior stabilities under shelf storing ( T 80 = 56696 h), thermal aging ( T 70 = 13920 h), and maximum power point tracking ( T 80 = 1058 h), compared to the ZnO-based devices. It can be attributed to the stable morphology of photoactive layer resulting from the optimized molecular distribution of the donor and acceptor and the absence of photocatalysis in the Ir/IrO x -based devices, which helps to maintain the improved charge extraction and inhibited charge recombination in the aged devices. This work provides a reliable and efficient electron-transporting material toward stable organic solar cells.
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高影响因子
Journal of Ocean University of China
·
2023
·Vol. 22
·期 2
·469-478
·
IF 1.6
Mei Xueqiao,Li Chunhu
Photocatalyst Ag/ZnO-TiO 2 was prepared by template method. The catalyst was characterized by XRD, SEM, and UV-vis DRS. Rhodamine B (RhB) and target pollutants were used to evaluate the photocatalytic performance of the catalyst under 40 W UV-lamp. The photocatalytic degradation mechanism of Rhodamine B was discussed through free radical quenching experiment. The experimental results show that hexagonal ZnO-TiO 2 can be successfully prepared by template method, and nano Ag particles are evenly loaded on the catalyst. Under the reaction conditions of 1% catalyst input and 40 W UV-lamp, the catalytic degradation rate of RhB by Ag/ZnO-TiO 2 was 98.28%. The photocatalytic degradation mechanism of Ag/ZnO-TiO 2 was explored by free radical quenching experiment. The experimental results show that H + and ·OH play a major role in the photocatalytic degradation of RhB by Ag/ZnO-TiO 2 .
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2023
·Vol. 39
·期 2
·187-191
·
IF 3.1
Jia Yanhua,Jiang Qinglin,Wang Bohan,Yang Jiaji,Zhang Jiang,Ma Yuguang
Due to their unique physicochemical properties, the anion radical and dianion of perylene diimide derivatives(PDIs) recently attracted significant attention for organic semiconductors. However, the impact of packing structure and the radical content for carrier transport in the solid state still need to be determined. Bringing the electron-withdrawing groups is an effective strategy for enabling π−π stacking distance. Here, bay-tetrachloro-substituted PDI(B-4Cl-PDI) anion radical and dianion films were fabricated quantitatively doped with N 2 H 4 ·H 2 O. The radical contents were quantitatively calculated by absorption spectra in different doping ratios. The X-ray powder diffraction patterns showed that the anion radical presented a crystalline structure, and dianion aggregates exhibited an amorphous structure. With precise manipulation of the radical content, the anion radical aggregates and dianion aggregates showed the maximum electrical conductivity value of 0.024 and 0.0018 S/cm, respectively. The experiment results show that doping level and aggregate structure play a crucial role in electronic transport properties.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2023
·Vol. 31
·期 8
·3585-3603
·
IF 5.3
Xie Shuang,Wang Wenjing,Yao Jiahong,Yu Dawei,Wang Xiaojun,Yang Jie
The biobased monomers have been widely used to address climate change and biodiversity loss. In this study, the high heat-resistant poly(pentamethylene terephthalamide) (PA5T) and furan copolymer poly(pentamethylene terephthalamide/pentamethylene furanamide) (PA5T/5F) were synthesized successfully. Importantly, the 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD)-catalyzed bulk polymerization combining the solid state polycondensation (SSP) as a facile, green and robust route was chosen. The PA5T and PA5T/5F had high melting temperatures at 350.8 and 309.8 °C, respectively. Besides, their initial decomposition temperatures, evaluated as the temperature at 5% mass loss ( T 5% ) were at 420.0 and 413.2 °C, respectively, higher than melting temperatures, which demonstrated that furan unit had considerable thermal stability with benzene ring and they had great melt processing without thermal decomposition. It was first found that end amino groups after side reaction of N-methylation still could react with esters to form amides in solid state polycondensation. Additionally, the non-isothermal crystallization kinetics of PA5T and PA5T/5F were systematically studied by Jeziorny method and Mo method. It is found that crystallization rate of PA5T was greater, and the crystallization activation energy of PA5T/5F determined by the differential isoconversional method of Friedman was larger at the same relative crystallinities.
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NATURE
·
2023
·Vol. 616
·期 7955
·77-83
·
IF 64.8
Yin Yi-Chen,Yang Jing-Tian,Luo Jin-Da,Lu Gong-Xun,Huang Zhongyuan,Wang Jian-Ping,Li Pai,Li Feng,Wu Ye-Chao,Tian Te,Meng Yu-Feng,Mo Hong-Sheng,Song Yong-Hui,Yang Jun-Nan,Feng Li-Zhe,Ma Tao,Wen Wen,Gong Ke,Wang Lin-Jun,Ju Huan-Xin,Xiao Yinguo,Li Zhenyu,Tao Xinyong,Yao Hong-Bin
Inorganic superionic conductors possess high ionic conductivity and excellent thermal stability but their poor interfacial compatibility with lithium metal electrodes precludes application in all-solid-state lithium metal batteries 1 , 2 . Here we report a LaCl 3 -based lithium superionic conductor possessing excellent interfacial compatibility with lithium metal electrodes. In contrast to a Li 3 MCl 6 (M = Y, In, Sc and Ho) electrolyte lattice 3 , 4 , 5 , 6 , the UCl 3 -type LaCl 3 lattice has large, one-dimensional channels for rapid Li + conduction, interconnected by La vacancies via Ta doping and resulting in a three-dimensional Li + migration network. The optimized Li 0.388 Ta 0.238 La 0.475 Cl 3 electrolyte exhibits Li + conductivity of 3.02 mS cm −1 at 30 °C and a low activation energy of 0.197 eV. It also generates a gradient interfacial passivation layer to stabilize the Li metal electrode for long-term cycling of a Li–Li symmetric cell (1 mAh cm −2 ) for more than 5,000 h. When directly coupled with an uncoated LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode and bare Li metal anode, the Li 0.388 Ta 0.238 La 0.475 Cl 3 electrolyte enables a solid battery to run for more than 100 cycles with a cutoff voltage of 4.35 V and areal capacity of more than 1 mAh cm −2 . We also demonstrate rapid Li + conduction in lanthanide metal chlorides (LnCl 3 ; Ln = La, Ce, Nd, Sm and Gd), suggesting that the LnCl 3 solid electrolyte system could provide further developments in conductivity and utility.
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高影响因子
COLLOID AND POLYMER SCIENCE
·
2023
·Vol. 301
·期 5
·455-464
·
IF 2.4
Jong Kwanghyok,Ju Benzhi,Kim Ganghyok,Kim Kwangjin
A novel type of temperature-pH dual-responsive amphiphilic hydrogel, PD(hydroxyethyl starch(HES)-propynyl glycidylether(PGE)-2-dimethylamino ethanethiol (DMAET)-triethoxyvinylsilane (TEVS)) was synthesized and characterized. HES, a hydrophilic polysaccharide, underwent etherification of hydroxyl groups in its glucose units with PGE and then click reaction between carbon–carbon triple bonds in PGE and thiol groups in DMAET thereby possessing a hydrophilic-hydrophobic structure to be used for the preparation of PD, a temperature-pH dual-responsive material, with pH-responsive tertiary amine groups. Next, it further became a dual-responsive hydrogel through the formation of its internal network by TEVS. The hydrogel exhibited its maximum hydroswelling ratio of 2000 and a good transference between its shrinking and swelling. Moreover, during the test experiments to use it as a drug carrier for oral delivery, a doxorubicin (DOX) release was ≤ 15% in acidic conditions in the stomach (pH < 2.0) and ≤ 94% in basic conditions in the small intestine, ensuring that it exhibits relatively good protective and release properties of drugs.
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高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 8
·5201-5215
·
IF 5.7
Zhou Xiaoqian,Guo Dandan,Huang Shaohua,Zhao Yufen
Inspired by wet-cool/dry-hot cycle derived prebiotic reactions, a green and efficient dry–wet cycle modification method was proposed for the preparation of polypeptide-modified bamboo fiber (P-MBF). Functionalization of P-MBF was characterized by Fourier transform infrared spectroscopy, element analysis, X-ray photoelectron spectroscopy, X-ray diffraction, and scanning electron microscopy. Compared to raw bamboo fiber materials, P-MBF showed better dispersibility in aqueous solutions, and thus exhibited better adsorption performance for glycopeptide antibiotics in sewage treatment. With vancomycin as the target antibiotic, adsorption performance of P-MBF was studied in aqueous solution. The results showed that the adsorption reached equilibrium after 15 min, and adsorption kinetics and isotherms were well correlated with pseudo-second-order model (R 2 = 0.999) and Langmuir model (R 2 = 0.996), respectively. Investigation of thermodynamic parameters implied that the adsorption was a spontaneous exothermic process. The adsorption efficiencies in standard solution and drinking water were 97.83% and 91.32%, respectively. This study provides a green, efficient and economical modified bamboo fiber material for the removal of glycopeptide antibiotics from sewage samples. Graphical abstract
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高影响因子
BULLETIN OF MATERIALS SCIENCE
·
2023
·Vol. 46
·期 2
·1-10
·
IF 1.8
Li Xiameng,Zhao Yun,Li Tingting,Guo Guoqiang,Wang Yiru,Wang Xu,Yang Jingzheng,Chen Da
Recently, graphene quantum dots (GQDs) with bright fluorescence have emerged as a novel carbon nanomaterial because of their distinctive optical properties and robust chemical inertness. Herein, a simple bottom-up approach is used to prepare nitrogen-doped GQDs (N-GQDs) by using citric acid as the carbon source and tris (hydroxymethyl) aminomethane (Tris) as the nitrogen source. The prepared N-GQDs have a high yield of 61.50% and the quantum yield is 14.42%. Meanwhile, the N-GQDs exhibit clearly fluorescence quenching with the increase of pH value from 3.0 to 12.0. In addition, the N-GQDs possess excellent fluorescence quenching response to tetracycline (TC) due to the inner filter effect. And the fluorescence intensity of N-GQDs exhibits a good linear relationship with the addition of TC in range of 1–50 μM. The detection limit is determined to be 94 nM. Furthermore, the smartphone-based handheld device is developed to track the fluorescence colour changes caused by the variation of pH and TC. Through analysing the RGB values from the fluorescence images, good linearity between RGB values and pH values is obtained ( R 2 = 0.996), while the detection limit for TC detection is 97 nM. This method has been shown to be effective and reliable along with great promise for real-time visual monitoring of pH and TC values in real samples.
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BMC Complementary Medicine and Therapies
·
2023
·Vol. 23
·期 1
·1-11
·
IF 3.9
Cai Weiye,Sun Bin,Song Chao,Liu Fei,Wu Zhengliang,Liu Zongchao
Background In mouse, it was discovered that resveratrol (Res) enhanced osteoporosis (OP) by boosting osteogenesis. Besides, Res can also have an impact on MC3T3-E1 cells, which are crucial for the control of osteogenesis and thus increase osteogenesis. Although some articles have discovered that Res enhanced autophagy to promote the value-added differentiation of MC3T3, it is unclear exactly how this affects the process of osteogenesis in mouse. Therefore, we will show that Res encourages MC3T3-E1 proliferation and differentiation in mouse pre-osteoblasts and further investigate the autophagy-related mechanism for this impact.Methods (1) MC3T3-E1 cells were separated into blank control group and various concentrations (0.01, 0.1, 1, 10, 100µmol/L) of group in order to determine the ideal Res concentration. In the Res group, Cell Counting Kit-8 (CCK-8) was used to measure the proliferation activity of pre-osteoblasts in mice in each group after resveratrol intervention. Alkaline Phosphatase (ALP) and alizarin red staining were used to gauge the degree of osteogenic differentiation, and RT-qPCR was used to measure the expression levels of Runx2 and OCN in the osteogenic differentiation ability of the cells. (2) In the experiment, four groups were set up: the control group, 3MA group, Res group, and Res + 3MA group. To examine cell mineralization, ALP and alizarin red staining were utilized. RT-qPCR and Western blot detection of cell autophagy activity levels and osteogenic differentiation capacity in each group following intervention.Results (1) Resveratrol might increase the number of mice pre-osteoblast, with the impact being most pronounced at 10µmol/L (P < 0.05). The nodules developed substantially more often than in the blank control group, and Runx2 and OCN expressions significantly increased (P < 0.05). (2) In contrast to the Res group, after 3MA purine blocked autophagy, the Res + 3MA group’s alkaline phosphatase staining and the development of mineralized nodules were reduced. Runx2, OCN, LC3II / LC3I expression decreased, p62 expression increased (P < 0.05).Conclusion The present study partially or indirectly demonstrated that Res may, through increased autophagy, induce osteogenic differentiation of MC3T3-E1 cells.
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高影响因子
TRANSITION METAL CHEMISTRY
·
2023
·Vol. 48
·期 2
·125-133
·
IF 1.7
Hu Yi,Xu Jingsong,Zhang Tianzhu,Zhong Hang,Chen Jun,Liu Xinai,Pan Qifa,Liu Ruidong,Jiang Chunli,Chen Jun
Electrocatalytic water splitting to produce hydrogen is a promising route to provide green hydrogen on a large scale. To explore non-noble metal electrocatalysts with high performance is still a challenge. Herein, a one-step electrodeposition way is developed to construct the heterostructural (NiO-La 2 O 3 )/(Ni-La)/NiO/Ni electrocatalysts on Ni foam. The dark Ni-La coating was prepared by co-electrodeposition from an aqueous solution containing LaCl 3 and NiCl 2 with a molar concentration ratio of 1:5. Among these heterostructural Ni-based electrocatalysts, an excellent HER activity is achieved: an overpotential of 22 mV at the current density of 10 mA cm −2 in 1 M KOH solution. It is demonstrated that the introduction of La significantly reduces the overpotential for HER. The higher the La content in the Ni-La coating of these electrocatalysts, the better the electrocatalytic HER performance was exhibited. This work provides a facile and inexpensive route to prepare Ni-La coating on electrodes in an aqueous solution.
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