Journal of Materials Chemistry B
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2020
·Vol. 9
·期 4
·1082-1088
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IF 5.344
Lingshu Kong,Zijian Gao,Xinyao Li,Guanghui Gao
Self-adhesiveness is highly desirable for conformal and seamless wearable electronics. Here, a starch-tackifying method is proposed to obtain adhesive and robust hydrogel conductors with the assistance of amylopectin (Amy). The conductive hydrogels are composed of Amy/poly(acrylamide–acrylic acid) polymer networks, which can be assembled into wearable sensors. The hydrogels rely on physical interactions such as hydrogen bonding that can be generated on the surface of the material, including skin, to exhibit robust and repeatable self-adhesive behaviors. Besides, the construction of a covalent and dynamic dual cross-linking network endows the hydrogel with good mechanical properties to bear repeated stretching and flexible deformation. In particular, the hydrogel is assembled into a wearable stretchable and compressible sensor and exhibits a repeatable and stable resistance signal variation for detecting both large and tiny scale human activities and physiological signals, such as bending of joints, speaking, walking, and jumping. Accordingly, the amylopectin-enabled skin-mounted hydrogel sensor can be considered as an ideal choice for human movement monitoring and personal health diagnosis.
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高影响因子
ACS Applied Energy Materials
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2019
·
IF 0
Li-Ping Yang,Jian-Li Mi,Jia-Hao Liang,Zhao-Yang Zu,Peng Zhang
A simple and efficient method was developed to prepare a copper–carbon (Cu–C) catalyst with high oxygen reduction reaction (ORR) activity via direct pyrolysis of a mixture of metal salts (Cu(NO3)2·3H2O and Zn(CH3COO)2) and 1,3,5-benzenetricarbocylic acid at 1010 °C under a N2 stream. It is found that the Cu–C catalyst exhibits superior catalytic activity toward ORR with a half-wave potential of 0.81 V and a four-electron transfer pathway in 0.1 M KOH electrolyte. Generally, it is known that N plays an important role for the high ORR catalytic activities of nonprecious metal-doped carbon materials. Herein, we demonstrate that N is not required for the superior catalytic activity of Cu–C materials. Both the Cu particles and the embedded Cu atoms in the carbon substrate are suggested to provide the ORR active sites. In addition, despite the fact that the Zn is removed during the pyrolysis, the adding of Zn salt in the precursor is important for the enhanced catalytic activity. The evaporation of Zn during the pyrolysis results in the large surface area of the catalyst, which is beneficial to the mass transfer during the catalytic process. Moreover, a large number of carbon defects can be created via the removal of Zn atoms that facilitated the ORR.
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CHEMOSPHERE
·
2019
·
IF 5.108
Xiaodan Ma,Mengyuan Qi,Zhiling Li,Youkang Zhao,Peisheng Yan,Bin Liang,Aijie Wang
Obtaining efficient antibiotic-mineralizing consortium or pure cultures is a central issue for the deep elimination of antibiotic-contaminated environments. However, the antibiotic chloramphenicol (CAP) mineralizing consortium has not yet been reported. In this study, an efficient CAP-mineralizing consortium was successfully obtained with municipal activated sludge as the initial inoculum. This consortium is capable of aerobically subsisting on CAP as the sole carbon, nitrogen and energy sources and completely degrading 50 mg L −1 CAP within 24 h. After 5 d, 71.50 ± 2.63% of CAP was mineralized and Cl − recovery efficiency was 90.80 ± 7.34%. Interestingly, the CAP degradation efficiency obviously decreased to 18.22 ± 3.52% within 12 h with co-metabolic carbon source glucose. p -nitrobenzoic acid ( p- NBA) was identified as an intermediate product during CAP biodegradation. The consortium is also able to utilize p- NBA as the sole carbon and nitrogen sources and almost completely degrade 25 mg L −1 p- NBA within 24 h. Microbial community analysis indicated that the dominant genera in the CAP-mineralizing consortium all belong to Proteobacteria (especially Sphingobium with the relative abundance over 63%), and most bacteria could degrade aromatics including p- NBA, suggesting these genera involved in the upstream and downstream pathway of CAP degradation. Although the acclimated consortium has been successively passaged 152 times, the microbial community structure and core genera were not obviously changed, which was consistent with the stable CAP degradation efficiency observed under different generations. This is the first report that the acclimated consortium is able to mineralize CAP through an oxidative pathway with p -NBA as an intermediate product.
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JOURNAL OF MEDICINAL CHEMISTRY
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2019
·
IF 6.054
Ran Zhang,Xue-Qing Song,Rui-Ping Liu,Zhong-Ying Ma,Jing-Yuan Xu
As FDA-approved chemotherapeutic agents, cisplatin, oxaliplatin, and 5-fluorouracil are widely used in clinic but limited by severe side-effects. To ameliorate their respective defects, a series of “dual-prodrug” by linking oxoplatin and 5-FU were designed and synthesized. The assembled compounds 10–17, named Fuplatin, exhibited much higher cytotoxicity against the tested cancer cells while lower cytotoxicity toward the human normal lung cells than free drugs or their combinations. Among them, 14 enhanced cellular accumulation with 62- and 825-fold amount of oxaliplatin and 8 at 9 h, respectively, significantly induced DNA damage and cell apoptosis, and inhibited migration and invasion in HCT-116 cells. Compound 14 arrested the cell cycle at S and G2 phases and up-regulated thymidylate synthase and p53, consistent with the results of the combination, suggesting 14 adopted a collaborative mode of 5-FU and oxaliplatin to kill cancer cells. In vivo, compound 14 showed high antitumor effect and no observable toxicity in NOD/SCID mice bearing HCT-116 tumors.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2018
·
IF 4.61
Duofei Hu,Maocai Shen,Yaxin Zhang,Guangming Zeng
Micro(nano)plastics, new emerging contaminants , are widely found in the environment due to continuous release. Massive and widespread presence of micro(nano)plastics may have a significant impact on the calculation of total organic carbon , and potentially result in misunderstanding of the overall environmental pollution level. Previous studies typically paid attention to the environmental distribution, source, analysis methods and technologies , as well as the environmental and ecological effects of micro(nano)plastics. However, little was aware of the total organic carbon consequences. There are few evidences for the contribution of micro(nano)plastics to total organic carbon. Accordingly, more efforts need to be taken to explore the contribution of micro(nano)plastics to total organic carbon.
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高影响因子
Journal of Materials Chemistry C
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2025
·
IF 5.1
Ruipeng Shen,Min Li,Shuo Wang,Yu-Mo Zhang,Sean Xiao-An Zhang
Based on the dynamic coordination and dissociation of a leuco dye and Fe2+/Fe3+, we constructed an electrochromic system where the coloring unit and redox unit were separate. This electrochromic system combined the advantages of the stability of the metal ions and the color adjustability of the dyes. The electrochromic mechanism was found to be universal to multiple leuco dyes and the device showed an absorption change of 0.25 and a coloration efficiency of 192 cm2 C−1. Moreover, compared with our previous work, the cycle life was effectively improved (up to 4900 cycles), which was suspected to result from the smaller oxidizing potential of Fe2+. This approach to improve the cycle life of electrochromic devices may inspire further important results in the future.
研究领域:
材料科学
·
化学
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高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
He Mei,Ping Xu,Mengting Feng,Jianping Wang,Chenxin Zhang,Haibin Chen,Huili Wang,Junyi Guo,Xuedong Wang,Shugen Qu
Developing a rapid detection method of Cr(VI) and ascorbic acid (AA) is vital in the food and environmental fields. Herein, an anthrylimidazole-based fluorescent ionic liquid (AI-FIL) with the advantageous fluorescent properties was successfully prepared and used to construct a promising “on-off-on” fluoroprobe for rapid/sensitive Cr(VI) and AA detection. Cr(VI) could effectively quench the fluorescence of AI-FIL owing to the inner-filter effect and photoinduced electron-transfer process. However, the decreased fluorescence could be rapidly recovered by AA owing to the redox reaction between AA and Cr(VI). For Cr(VI) detection, a satisfactorily linear response (0.03–300 μM) was achieved with the corresponding detection limit of 9 nM. For AA detection, a good linearity from 1 to 1000 μM was obtained with the resultant detection limit of 0.3 μM. Moreover, the AI-FIL based fluoroprobe was successfully utilized for Cr(VI) and AA detection in food and water samples with satisfactory accuracy and precision.
研究领域:
分析化学
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环境科学
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食品科学
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高影响因子
MICROCHIMICA ACTA
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2013
·Vol. 180
·期 13
·1325-1332
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IF 3.434
Wu Ying,Feng Xun,Zhou Shenghai,Shi Hongyan,Wu Hongmin,Zhao Shujie,Song Wenbo
We report on a sensor for epinephrine (EP) that is based on an ITO electrode modified with multi-walled carbon nanotubes pre-coated with a polymerized ionic liquid (PIL-MWNTs). A chitosan film was then electrodeposited on the ITO electrode in the presence of EP (the template) and the PIL-MWNTs. This film acts as an excellent recognition matrix due to its excellent film-forming ability and the many functional groups that favor hydrogen bond formation with the target (EP). The PIL-MWNTs, in turn, can improve the sensing performance due to their good electrical conductivity, high dispersity, and large surface area. The imprinted films were characterized by scanning electron microscopy, X-ray diffraction, Fourier transform IR spectroscopy, and thermogravimetric analysis. The electrochemistry of the imprinted electrode was investigated by cyclic voltammetry, electrochemical impedance spectroscopy, differential pulse voltammetry and chronoamperometry. The response to EP is linear in the 0.2 μM to 0.67 mM concentration range, and the detection limit is as low as 60 nM (at an S/N of 3). The electrode is reusable and offers good reproducibility and stability.
An epinephrine imprinted electrode was facile achieved by electrodepositing chitosan on ITO surface in the presence of epinephrine and polymerized ionic liquid-functionalized carbon nanotubes, followed by removal of the epinephrine template molecule. Specific recognition of EP molecule and its determination were realized at this imprinted sensor.
研究领域:
生物传感器
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分析化学
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材料科学
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高影响因子
RSC Advances
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2018
·Vol. 8
·期 7
·3433-3442
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IF 2.936
Yumeng Zhou,Lijing Zhang,Shengyang Tao
The preparation of porous TiO2 as a carrier for the Fenton reaction is reported. Porous TiO2 is an excellent carrier to load with elemental iron due to the large specific surface area and negative surface charge. Porous TiO2 was synthesized in the form of a hierarchically porous silica monolith that was used as a microreactor, and a block copolymer served as a template for mesoporous forms. The crystalline TiO2 growing in confined spaces maintained the porous structure and high crystallinity. The surface area of our synthesized porous TiO2 can reach 205 m2 g−1. The zeta potential of the TiO2 was as low as −36.5 mV (pH 7). Elemental iron was highly and uniformly dispersed over the channel of the porous TiO2 via an impregnation method and served as the catalyst for the Fenton reaction. In the Fenton reaction, the synthesized catalyst performed strong catalytic activity during the degradation of wastewater containing an ultrahigh concentration of aqueous dye, at 400 ppm. The aqueous dye solution was degraded over 95% in 30 min, and the catalyst could be reused many times.
研究领域:
环境科学
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材料科学
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高影响因子
Materials
·
2022
·Vol. 15
·期 13
·4410
·
IF 3.748
Ke Xiong,Mengen Zhao,Zhaoying Wu,Wei Zhang,Chao Zhang
An orbital enucleation implant is used to compensate for the orbital volume deficits in the absence of the globe. In this work, copper-doped bioactive glass in poly(ether-ether-ketone) (CuBG/PEEK) composite scaffolds as an orbital enucleation implant were designed and fabricated by cool-pressed sintering and particle-leaching techniques, the incorporation of copper-doped bioactive glass in poly(ether-ether-ketone) (CuBG/PEEK) was expected to significantly improve the biocompatibility of the PEEK implant. The consequences after implantation of the CuBG/PEEK composite scaffolds in experimental, eviscerated rabbits was observed and assayed in term of histopathological examination. In detail, 24 rabbits were randomly divided into three groups: Group A, PEEK scaffolds; Group B, 20% CuBG/PEEK composite scaffolds; Group C, 40% CuBG/PEEK composite scaffolds; the rabbits were sacrificed at week 4 and week 12, followed by histochemical staining and observation. As a result, the PEEK group exhibited poor material exposure and tissue healing, while the CuBG/PEEK scaffolds showed good biocompatibility, and the 40% CuBG/PEEK composite scaffold exhibited the best performance in angiogenesis and tissue repair. Therefore, this study demonstrates the potential of CuBG/PEEK composite scaffolds as an orbital enucleation implant.Keywords:bioactive glass;poly(ether-ether-ketone);scaffold;enucleation;orbital implant
研究领域:
生物材料
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组织工程
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眼科
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生物医学工程
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2024
·
IF 5.7
Cheng Wang,Lian Duan,Binwang Yang,Zhixiong Ye,Jianna Yu,Jiaxu Liu,Xiuqin Zheng,Qi Yang,Guoxin Jing,Wen Liu,Wenshan Li,Wenjie Liu
Herein, we develop a novel method using gas chromatography-ion mobility spectrometry (IMS) with an ammonia dopant for the determination of volatile N-nitrosamines in meat products. The IMS system was implemented with Fourier deconvolution multiplexing to simultaneously improve the resolving power and sensitivity. The ammonia dopant mitigated the formation of N-nitrosamine dimer ions, suppressing the ionization of interferents and shifting the reactant peak from hydrated protons to hydrated ammonium ions. The ammonium adduct product ions of N-nitrosamines were confirmed using time-of-flight mass spectrometry. The instrument limits of detection and quantitation for nitrosamines were 0.78–1.79 and 2.60–5.82 ng/mL, respectively, with recoveries between 71.39% and 110.59% using a simple water distillation method. The developed method showed satisfactory performance when applied to the detection of nitrosamines in various meat products.
研究领域:
分析化学
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食品科学
·
光谱学
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Suqi Huo,Wenyue Zhang,Yujie Qiang,Ye Zhang,Subramanian Sundarrajan,Lei Guo,Tianhu Liu,Seeram Ramakrishna
Aluminum-air batteries, known for their high energy density and environmental friendliness, often face significant challenges due to the corrosion of aluminum anodes, which limits their performance and lifespan. The corrosion inhibition effect of eco-friendly N-α-Fmoc-N-epsilon-Boc-D-lysine (FDLH) in alkaline aluminum-air battery on Al-5052 anodes is investigated by H 2 evolution experiments, electrochemical tests, microscopic characterization, spectroscopic examination, and simulated calculations. It demonstrates that the carboxyl oxygen in the molecular structure of FDLH has good coordination with the Al. FDLH can form an adsorption film on the surface of Al-5052 anode, achieving the purpose of protecting the Al-5052 anode from corrosion. Furthermore, the adsorption behavior of the FDLH plays a crucial role in achieving uniform anode discharge potential and enhancing electrochemical performance. At an optimal concentration of 7 mM FDLH, the inhibition efficiency reaches 57.1 %, while the anode utilization rate increases to 85.0 %. These findings highlight the potential of FDLH as an effective corrosion inhibitor, contributing to the improvement of both the durability and efficiency of aluminum-air battery systems.
研究领域:
材料科学
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电化学
·
环境科学
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高影响因子
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