RSC Advances
·
2022
·Vol. 12
·期 34
·21851-21858
·
IF 4.036
Nan Zhao,Lu Ren,Guangyi Du,Jing Liu,Xueqiu You
The rGO/CeO2/FTO nanocomposite modified electrode was prepared by an electrochemical method. A simple and highly sensitive electrochemical sensing platform for electrochemical rGO and modified CeO2 nanoribbons directly on FTO electrodes was developed. Simultaneous determination of Pb2+ and Cd2+ used the differential pulse anodic stripping voltammetry (DPASV) method. The method was simple to operate, and CeO2 nanobelts could be obtained simultaneously by electrodeposition and reduction of GO without further processing. This is an environmentally friendly electrochemical method to obtain modified electrodes under mild conditions. The experimental results showed that the linear calibration curves of Pb2+ and Cd2+ are 1–300 and 0.2–500 μg L−1, respectively. At the same time, no interference from other coexisting metal ions was found during the detection process, which proved that the modified electrode had good stability and repeatability.
研究领域:
环境科学
·
分析化学
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DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Qiushi Tang,Jiwen Hu,Shi Li,Shudong Lin,Yuanyuan Tu,Xuefeng Gui,Yonglu Dong
In this study, a colorimetric hydrogel with a strong network employing natural anthocyanin as an indicator was developed for visual monitoring of shrimp and fish spoilage. Polyvinyl alcohol (PVA) and sodium alginate (SA) were used as matrix models to prepare functional hydrogels with a double network structure by a simple freezing/thawing process and calcium cross-linking in SA. To enhance the strength of the hydrogel, aramid nanofibers (ANFs) were introduced which were obtained from aramid fibers by a deprotonation method. The natural anthocyanin extract was extracted from purple cabbage by a hot water soaking method and acted as the color sensing substance in the hydrogel. Smartphone-based RGB color analysis showed good color response of the hydrogel indicators to amines. Various characterization methods revealed that the hydrogel also had good thermal stability, mechanical properties, and water resistance. The hydrogels exhibited good performance for the spoilage monitoring of shrimp and fish through correlation analysis, indicating that they are promising candidates for sensing applications.
研究领域:
食品科学
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材料科学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 11
·112504
·
IF 3.9
Xiaocong Zhong,Yahui Ren,Huai Jiang,Kuifang Zhang,Ruixiang Wang,Zhifeng Xu,Boyi Xie,Shuiping Zhong
Based on the outstanding catalytic activity and stability of Mn-Co bimetallic oxides toward oxygen evolution in acidic solutions, MnCo2O4.5 was incorporated into a Pb matrix through a powder pressing-sintering process to obtain a Pb-MnCo2O4.5 composite anode. The results show that compared with the Pb anode that was made via the powder pressing-sintering process (PS-Pb), the oxide layer formed on the Pb-MnCo2O4.5 anode presented a higher flatness, compactness, and β-PbO2 concentration. Consequently, Pb-5.0MnCo2O4.5 presented a stable anodic potential of 1.235 V, approximately 170 mV lower than that of the PS-Pb anode. In the case of lower MnCo2O4.5 content (≤2.5%), the Pb-MnCo2O4.5 composite anode exhibited a smaller Tafel slope (70.39 ∼ 79.59 mV dec−1) and a lower charge transfer resistance (0.437 ∼ 0.676 Ω cm2). The fresh Pb-5.0MnCo2O4.5 composite anode showed a self-corrosion density of 0.25 mA cm−2, approximately 14.3% of that tested on the PS-Pb anode. However, Co2+ and Mn2+ were detected in the electrolyte during 72 h of electrowinning with the Pb-MnCo2O4.5 composite anode. In summary, the Pb-MnCo2O4.5 composite anode has the potential to reduce the energy consumption of the metal-electrowinning process. Nonetheless, it is necessary to evaluate the influence of dissolved Co2+ and Mn2+ on the cathodic process before commercial application.
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高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 41
·20513-20522
·
IF 9.931
Yunyun Huang,Aoxiang Xiao,Guanhua Hou,Hongtao Li,Tuan Guo,Bai-Ou Guan
An in situ strategy to understand the photocatalytic performance of Cu2O–Ag@rGO nanocomposites through interfacial photocatalysis on an optical microfiber has been proposed and experimentally demonstrated. The photocatalysts were conjugated on the surface of an optical microfiber immersed in an organic solution, forming an interface consisting of photocatalysts and organic molecules between the silica microfiber and the solution, which was within the evanescent field of the optical microfiber. In the photocatalytic process, the decomposition of organics changed the refractive index (RI) of the interface. The interaction between the evanescent wave and the microfiber interface modulated its optical spectrum. Therefore, the optical microfiber monitored the photocatalytic performance of the photocatalysts in real-time and in situ. The results reveal that the photodegradation efficiency of Cu2O–Ag@rGO was almost twice that of Cu2O, while the degradation rate constant was more than five times larger, because the coupling between the silver nanoparticles and reduced graphene oxide (rGO) enhanced the photocatalytic performance of Cu2O. By taking advantage of its miniature size and mechanical flexibility, the microfiber can directly probe a real matrix to study the local photocatalytic performance. This strategy is suitable for the evaluation of most photocatalysts and might provide a new perspective to assess the photocatalytic performance of the catalysts.
研究领域:
材料科学
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光学
·
环境科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Hui Yang,Minghao Zhang,Junting Wang,Shengnan Wang,Shumin Wang,Lina Yang,Peng Wang,Hong Song,He Liu,Yutang He
The applications of polysaccharides as emulsifiers are limited due to the lack of hydrophobicity . However, traditional hydrophobic modification methods used for polysaccharides are complicated and involve significant mechanical and thermal losses. In this study, soy hull polysaccharide (SHP) and terminally aminopropylated polydimethylsiloxane (NPN) were selected to investigate the feasibility of a simple and green interfacial membrane strengthening strategy based on the interfacial polymerization of anionic polysaccharides and fat-soluble alkaline ligands. Our results show that deprotonated SHP and protonated NPN can be complexed at the water/oil (W/O) interface, reduce interfacial tension, and form a strong membrane structure. Moreover, they can quickly form a membrane at the W/O interface upon the moment of contact to produce stable all-liquid printing products with complex patterns. However, the molecular weight of NPN affects the complexation reaction. Consequently, this study has long-term implications to expanding the areas of application for anionic polysaccharides.
研究领域:
食品科学
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材料科学
·
生物化学
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DOI
PubMed
高影响因子
ADVANCED SYNTHESIS & CATALYSIS
·
2016
·Vol. 358
·期 13
·2116-2125
·
IF 6.453
Anguo Ying,Shuo Liu,Zhifeng Li,Gang Chen,Jianguo Yang,Hua Yan,Songlin Xu
A magnetic nanoparticles-supported chiral aminocyclohexane in combination with sulfamide, which was modified by an imidazolium ionic moiety, was prepared and characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), thermal gravimetric (TG) analysis and elementary analysis. The catalyst was successfully applied not only in the enantioselective Michael addition but also in the asymmetric aldol condensation to afford good to excellent yields (70–94%) and satisfactory stereoselectivity ( ee : 92–100%, dr : 91:9–99:1).The role of the ionic moiety was verified by comparison of the catalyst with an ionic moiety-free counterpart. The heterogeneous catalyst was easily separated and recovered using external magnetic force and can be used for up to five times without obvious loss in its catalytic activity.
研究领域:
有机化学
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催化化学
·
材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Lei Qiu,Jing Zhang,Ji-Zheng Song,Shun-Juan Hu,Tong-Sheng Zhang,Ze Li,Juan-Juan Wang,Wen Cheng
Chitin is one of the major components of the fungal cell wall and contributes to the mechanical strength and shape of the fungal cell. Zn(II) 2 Cys 6 transcription factors are unique to the fungal kingdom and have a variety of functions in some fungi. However, the mechanisms by which Zn(II) 2 Cys 6 proteins affect entomopathogenic fungi are largely unknown. Here, we characterized the Zn(II) 2 Cys 6 transcription factor BbTpc1 in the insect pathogenic fungus Beauveria bassiana . Disruption of BbTpc1 resulted in a distinct changes in vegetative growth and septation patterns, and a significant decrease in conidia and blastospore yield. The Δ BbTpc1 mutant displayed impaired resistance to chemical stresses and heat shock and attenuated virulence in topical and intrahemocoel injection assays. Importantly, the Δ BbTpc1 mutant had an abnormal cell wall with altered wall thickness and chitin synthesis, which were accompanied by transcriptional repression of the chitin synthetase family genes. In addition, comparative transcriptomics revealed that deletion of BbTpc1 altered fungal asexual reproduction via different genetic pathways. These data revealed that BbTpc1 regulates fungal development, chitin synthesis and biological control potential in B . bassiana .
研究领域:
微生物学
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分子生物学
·
植物保护
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DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2014
·Vol. 161
·期 9
·H453
·
IF 2.859
Jing Zhang,Xue Wang,Shibo Zhang,Wenchang Wang,Masashi Hojo,Zhidong Chen
A novel electrochemical sensing platform was designed for simultaneous determination of Ponceau 4R and Tartrazine using an ionic liquid modified expanded graphite paste electrode (IL-EGPE). The IL-EGPE was prepared by mixing ionic liquid-expanded graphite composite (IL-EG) with solid paraffin. Based on the advantageous functions of IL and EG, IL-EGPE showed excellent electrocatalytic activity toward the simultaneous oxidation of Ponceau-4R and Tartrazine. Due to the electrocatalytic activity to Ponceau-4R and Tartrazine, a sensor for Ponceau-4R and Tartrazine was constructed based on IL-EGPE. Under optimal experimental conditions, the designed sensor exhibited wide linear responses to Ponceau 4R and Tartrazine ranging from 1.0 × 10−8 to 5.0 × 10−6 mol/L and 1.0 × 10−8 to 2.0 × 10−6 mol/L, respectively. The detection limits for Ponceau 4R and Tartrazine were 1.4 × 10−9 mol/L (0.85 ng/mL) and 3.0 × 10−9 mol/L (1.6 ng/mL) at a signal-to-noise ratio of 3, respectively. This sensor showed good reproducibility, stability and reusability. The proposed sensor was successfully applied in the simultaneous determination of Ponceau-4R and Tartrazine in soft drink with satisfactory results.
研究领域:
分析化学
·
材料科学
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2025
·
IF 10.5
Wenying Cui,Wenjiao Li,Chenggang Liu,Cheng Yao,Chan Song
Dopamine (DA) is a critical catecholamine neurotransmitter in the human body, making its assay highly significant for clinical diagnosis. In this study, two-dimensional (2D) oxygen-terminated TiB 2 nanosheets (NSs) were synthesized and characterized, exhibiting remarkable oxidase-like activity. These oxygen-terminated TiB 2 NSs can directly catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to oxTMB without requiring external oxidants such as H 2 O 2 or partially reduced oxygen (PROS). Interestingly, DA was found to effectively reduce the amount of oxTMB in the catalytic system. Based on this unique catalytic mechanism, a colorimetric sensor for DA detection was developed. The presence of antioxidants such as glutathione (GSH) and L-cysteine (L-Cys) in the samples failed to interfere the DA detection. It is contributed to the PROS-free catalytic mechanism of oxygen-terminated TiB 2 NSs and strong reduction ability of DA toward oxTMB. The sensing platform has a linear detection range of 0.1–8 μM with the detection limit (LOD) of 0.025 μM (3 σ / S ) and the quantification (LOQ) limit of 0.083 μM (10 σ / S ). Notably, oxygen-terminated TiB 2 NSs retained their high oxidase-like catalytic activity in the diluted real samples, highlighting their potential for biosensing applications.
研究领域:
纳米技术
·
生物分析
·
酶模拟
·
传感器
·
神经化学
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产品关联
DOI
PubMed
高影响因子
Acta Biomaterialia
·
2018
·
IF 6.383
Xiaozhi Ren,Yiming Han,Jie Wang,Yuqi Jiang,Zhengfang Yi,He Xu,Qinfei Ke
A chronic wound in diabetic patients is usually characterized by poor angiogenesis and delayed wound closure. The exploration of efficient strategy to significantly improve angiogenesis in the diabetic wound bed and thereby accelerate wound healing is still a significant challenge. Herein, we reported a kind of aligned porous poly ( l -lactic acid) (P l LA) electrospun fibrous membranes containing dimethyloxalylglycine (DMOG)-loaded mesoporous silica nanoparticles (DS) for diabetic wound healing. The P l LA electrospun fibers aligned in a single direction and there were ellipse-shaped nano-pores in situ generated onto the surface of fibers, while the DS were well distributed in the fibers and the DMOG as well as Si ion could be controlled released from the nanopores on the fibers. The in vitro results revealed that the aligned porous composite membranes (DS-PL) could stimulate the proliferation, migration and angiogenesis-related gene expression of human umbilical vein endothelial cells (HUVECs) compared with the pure P l LA membranes. The in vivo study further demonstrated that the prepared DS-PL membranes significantly improved neo-vascularization, re-epithelialization and collagen formation as well as inhibited inflammatory reaction in the diabetic wound bed, which eventually stimulated the healing of the diabetic wound. Collectively, these results suggest that the combination of hierarchical structures (nanopores on the aligned fibers) with the controllable released DMOG drugs as well as Si ions from the membranes, which could create a synergetic effect on the rapid stimulation of angiogenesis in the diabetic wound bed, is a potential novel therapeutic strategy for highly efficient diabetic wound healing. Statement of Significance A chronic wound in diabetic patients is usually characterized by the poor angiogenesis and the delayed wound closure. The main innovation of this study is to design a new kind of skin tissue engineered scaffold, aligned porous poly ( l -lactic acid) (P l LA) electrospun membranes containing dimethyloxalylglycine (DMOG)-loaded mesoporous silica nanoparticles (DS), which could significantly improve angiogenesis in the diabetic wound bed and thereby accelerate diabetic wound healing. The results revealed that the electrospun fibers with ellipse-shaped nano-pores on the surface were aligned in a single direction, while there were DS particles distributed in the fibers and the DMOG as well as Si ions could be controllably released from the nanopores on the fibers. The in vitro studies demonstrated that the hierarchical nanostructures (nanopores on the aligned fibers) and the controllable released chemical active agents (DMOG drugs and Si ions) from the DS-PL membranes could exert a synergistic effect on inducing the endothelial cell proliferation , migration and differentiation. Above all, the scaffolds distinctly induced the angiogenesis, collagen deposition and re-epithelialization as well as inhibited inflammation reaction in the wound sites, which eventually stimulated the healing of diabetic wounds in vivo . The significance of the current study is that the combination of the hierarchical aligned porous nanofibrous structure with DMOG-loaded MSNs incorporated in electrospun fibers may suggest a high-efficiency strategy for chronic wound healing.
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PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 51
·45475-45481
·
IF 3.289
Yi Yang,Kang Shen,Jun-zhong Lin,Yong Zhou,Qiao-yun Liu,Cheng Hang,Hani Nasser Abdelhamid,Zhen-qin Zhang,Hong Chen
A novel zinc-based luminescent metal–organic framework (Zn-MOF) has been successfully constructed based on a designed flexible and electron-rich N-involved linker (HL = 4-(bis(4-(pyridin-4-yl)phenyl)amino)benzoic acid). The framework of this Zn-MOF exhibits a 2-fold interpenetrated network which is composed of (3,3)-c sheets. The Zn-MOF has a strong solid state emission at 512 nm. The luminescence signal of the Zn-MOF can be quenched efficiently by trace amounts of electron-deficient nitroaromatics, especially 2,4,6-trinitrophenol (TNP). The quenching constant (Ksv) for TNP is 2.11 × 104 M−1, indicating that this framework can be employed as an excellent chemical sensor for identifying and quantifying TNP. This work highlights a strategy for designing a N-involved π-electron-rich enhanced ligand with nucleophilic properties for MOF-based materials as sensors. It also paves the way toward exploring other more efficient MOF materials as sensors for determining electron-deficient nitroaromatics.
研究领域:
材料科学
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化学传感
·
分子设计
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DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 35
·10429-10435
·
IF 0
Peng Yan,Lei Lu,Xiao-min Liu,Yin Cao,Zhi-peng Zhang,Hui Yang,Xiao-dong Shen
A novel, economic and scalable method is proposed in this context using an impinging jet reactor to continuously precipitate FePO4 (FP) nanoparticles with high purity. The LiFePO4/C (LFP/C) nano-composites synthesized from the FP, lithium and carbon sources show fast charge capability and excellent power performance. The generated FP and LFP/C are characterized with X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and inductively coupled plasma (ICP) spectrometry. The LFP/C nano-composites are cycled at various C-rates to explore the electrochemical performance. When the pH of the working solution is 1.3, the molar ratio of Fe to P equals 1 in the obtained amorphous FP. In addition, the precipitation mechanism is discussed. Compared to the amorphous FP, the hexagonal FP obtained after calcining the former one is preferred to synthesize high power LFP/C. It is proved that 2 mol% excess LiOH is needed to compensate for the possible loss of Li during calcination. With 4.4 wt% of in situ carbon coating, the LFP/C nano-composites exhibit 145 mA h g−1 at 10 C (1.7 A g−1, 6 min) charge (without floating charge) and discharge, without obvious capacity loss up to 100 cycles, which is among the best high power performances reported so far. This strategy offers an inexpensive and easy control method to mass-produce high quality LFP/C nano-composites which might be suitable for powering hybrid electric vehicles and plug-in hybrid electric vehicles.
研究领域:
材料科学
·
电化学
·
能源技术
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产品关联
DOI
危险品化学品经营许可证（带存储）