MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Yijie Wang,Xudong Wu,Dan Chen,Linqian Hou,Dezhi Yang,Hong Li,Yaling Yang
The rapid and sensitive detection of glyphosate herbicide in agricultural products is urgent need. Herein, we develop a photosensitive Fe 3 O v -Mo/P nanozyme with defect-rich rough surface by the co-precipitation method. In particular, the Fe 3 O v -Mo/P nanozyme with high-percentage oxygen vacancy (OV) defects and rough surface exhibited superior peroxidase (POD)-like activity and kinetics. More intriguingly, Fe 3 O v -Mo/P nanozyme with strong optical absorption in near-infrared (NIR) region showed excellent light-promoted POD-like activity. It was found that the defect-rich rough surface is conducive to the adsorption of glyphosate to inhibit the POD-like activity of Fe 3 O v -Mo/P. Under near-infrared laser irradiation, the inhibitory effect of glyphosate on the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by Fe 3 O v -Mo/P was increased by 2.64 times. A colorimetric platform was developed for the detection of glyphosate with a low detection limit of 0.032 mg L -1 and good selectivity. The method was used to determine the residual glyphosate in coffee, and the recovery efficiency was between 91.20–104.00 %. This work that combines the advantage of defect engineering and NIR provides a strategy for developing high-active nanozyme in pesticide assay.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2024
·
IF 2.7
Yufei Lei,Qi Li,Qian Li,Dongxiu He,Jinhua Xue,Lifu Liao,Jikai Wang,Xilin Xiao
In this paper, nitrogen-doped carbon dots (NCDs) were synthesized via a facile hydrothermal method using gum arabic (GA) and tris(hydroxymethyl)methyl aminomethane (tris) as precursors. The resultant NCDs show uniform size distribution and stable optical performance. Then a fluorescent signal quenching probe based on NCDs was proposed for the quantitative detection of mercury ions (Hg2+). The developed fluorescent nanoprobe based on NCDs demonstrated a good linear relationship in the range of 10 to 120 μM (R2 = 0.99265) for toxic mercury(II), with a detection limit of 4.87 μM. Additionally, the present assay system could be efficiently used for the detection of Hg2+ in real water samples with a satisfactory recovery rate (96.11–104.04%). The metal-free NCDs, which exhibited little cytotoxicity, were successfully applied to in vitro fluorescence imaging of human triple negative breast cancer (TNBC) cells, achieving visualization of Hg2+ in cells. With good water solubility and biocompatibility, the nitrogen-doped carbon dots synthesized by this economical and ecologically friendly process are suitable for use in analytical testing and biological research.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yang Yuan,Hui Jia,Jibao Liu,Fei Gao,Xu Zhu,Zihan An,Jie Wang
The development of new low-cost, highly selective and efficient methods for the separation and detection of heavy metal ions in aqueous environments is of great importance for water safety and biological health. In this study, a novel ion separation membrane was prepared for the separation of copper ions in cadmium ion detection solution. Compared with the commercial membrane, the ion mobility was increased by 64.02 %, and further separated by selective complexation of thiacalix[4]arene-p-tetrasulfonate (TCAS), and the separation factor for Cu/Cd reached 34.66. This allowed Cd to be detected preferentially, and reduced the interference of other ions in the detection. The joint electric field environment was regulated to separate the organics and reduce the interference to the detection. The sensing performance was enhanced by modifying the screen-printed electrodes. The proposed sensing platform allows for simultaneous pre-processing and detection and has a detection limit of 0.19 μg-L −1 (S/N = 3) for Cd 2+ .
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zhaohui Fei,Chi Jiang,Qunwei Tang,Yingfei Hou
To solve the scarcity of fresh water, reverse osmosis (RO) technology for seawater desalination and wastewater reuse has been developed rapidly. However, the performance of RO is limited by poor selectivity towards certain harmful small molecule constituents (e.g., boron in seawater and N-nitrosodimethylamine in wastewater) and the permeability-selectivity trade-off. Herein, a metal polyphenol network interlayer including both hydrophobic zone and monomer adsorption zone is proposed to optimize interfacial polymerization (IP) process for fabrication of RO membrane . This heterogeneous characteristic is endowed by well-chosen phenol (i.e. TTSBI) and metal (Ni). The physicochemical properties of the substrate are also optimized. An ultra-selective RO membrane with thinner separation layer, higher crosslinking degree and larger surface area is obtained. The RO membranes exhibit separation performance beyond the upper selectivity limit for NaCl and hazardous small molecules. The membrane water permeance is 3.50 L m −2 h −1 bar −1 while the NaCl rejection is 99.5 %. Meanwhile, the mechanism of the interlayer influencing IP process is investigated by combining molecular simulation and experimental methods. Our work provides a novel design direction of substrate used for fabricating RO membrane with outstanding performance.
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高影响因子
Journal of Biomedical Nanotechnology
·
2017
·Vol. 13
·期 12
·1631-1646
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IF 4.521
Wang Jiao,Liu Qiang,Yang Linnan,Xia Xiaofei,Zhu Rongrong,Chen Shengguang,Wang Mei,Cheng Liming,Wu Xianzheng,Wang Shilong
Cervical cancer is the fourth most common cancer in women worldwide, and existing treatments cause severe side effects and great burdens. Thus, the development of safe, inexpensive therapeutic agents is necessary. Curcumin (Cur), a well-known natural product, exerts promising anti-cancer
activities against various cancer types. However, its therapeutic efficacy is severely restrained due to rapid degradation, poor aqueous solubility, and low bioavailability. The objective of this study was to investigate the therapeutic potential of novel curcumin-loaded TPGS/F127/P123 mixed
polymeric micelles (Cur@NPT100) for cervical cancer treatment. The Cur@NPT100 exhibited an average size of approximately 19 nm, a zeta potential of around –4 mV, a drug loading of 8.18 ± 0.36%, and an encapsulation efficiency of 79.38 ± 4.65%. Unlike free Cur, Cur@NPT100
are readily dispersed in aqueous medium, showing enhanced stability and a sustained release profile over a 6-day period. In vitro cell culture experiments revealed that TPGS/F127/P123 mixed polymeric micelles (NPT100) based nanocarriers substantially promoted the selective cellular
uptake of Cur into HeLa cells rather than by non-cancerous NIH3T3 cells, inducing higher cytotoxicity and greater apoptosis and significantly increasing the percentage of cells arrested at the G2/M phase of the cell cycle. Additionally, the Cur@NPT100 facilitated more Cur accumulation in the
mitochondria and decreased the mitochondrial membrane potential. In addition, western blot assays demonstrated that Cur@NPT100 were more potent than free Cur at activating the mitochondria-mediated apoptosis pathway. In vivo results further confirmed that Cur@NPT100 exhibited a much higher
antitumor efficacy than free Cur and had excellent biocompatibility. In conclusion, Cur@NPT100 might be an effective therapeutic agent for cervical cancer.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 9
·6562-6573
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IF 2.993
Jia Zhengfeng,Li Haoqi,Zhao Yao,Dikin Dmitriy A.,Ni Junjie,Zhao Limin,Zhen Jinming,Ge Bo,Shao Xin,Ren Fei
In this study, copper (Cu)/polydopamine (PDA) composite was fabricated by vacuum hot-press sintering of micrometer-sized Cu particles covered with PDA film tailored at the nanometer scale thickness. The resultant compacts exhibited much higher electrical conductivity than the uncoated counterparts. Analyses of sintered samples using scanning and transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy revealed the conversion of PDA into carbonized PDA (cPDA). The increased mass density and grain growth are likely responsible for improved electrical conductivity of the composite material.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 7
·5954-5960
·
IF 2.324
Wang Yan,Wang Yishu,Han Jing,Tan Shihai,Guo Fu
Sn grain orientation in solder matrix has recently been considered as one of the principal failure contributions in lead-free solder joints. Since β -Sn exhibits high anisotropy, the differences of electromigration behavior of solder joints with various grain orientations are dramatic. With different angle ( θ ) between the c -axis of Sn grain and the direction of electron flow, the solder joints often demonstrate varying degrees of electromigration-induced damage. The present investigation illustrated significant differences in microstructural features on the surface of Cu reinforced composite solder joints, even with similar angle θ . Two Cu particles reinforced Sn 3.5 Ag composite solder joints with the similar angle θ of 35° and 40° were selected to investigate the effects of Sn grain c -axis on electromigration under high current stressing for 528 h. A large number of Cu 6 Sn 5 compounds were observed and occupied nearly the whole surface with clear polarization effect in one sample. In contrast, very few Cu 6 Sn 5 were found on the surface of the solder matrix in the other sample after current stressing, and the Cu 6 Sn 5 which was formed after reflow disappeared with subsequent current stressing. Even though polarization effect was not obvious, and the cathode interfacial dissolution was observed on such sample. Systematic study revealed that the angle θ alone was not a sole factor to determine the electromigration damage. It has to be considered along with the coordinate system containing the orientation of the c -axis of the Sn grain, a more dominative factor for the diffusing species.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 10
·7793-7808
·
IF 2.993
Dong Chundong,Zhang Manxin,Xiang Tengfei,Yang Ling,Chan Wenming,Li Cheng
This work creatively utilized the pH-dependent electrostatic interactions between L-valine (L-Val) and halloysite nanotubes (HNTs) to fabricate pH-responsive anticorrosion materials and compared with 2-mercaptobenzothiazole (MBT)-loaded HNTs, which were assembled via layer-by-layer (LbL) self-assembly. These two methods can achieve controlled release of inhibitors and self-healing performance. However, the loading capacity of L-Val-loaded HNTs is higher than that of MBT’s. There are 12 and 7 wt%, respectively. The pH-responsive release property was systematically evaluated by ultraviolet–visible (UV/Vis) spectrophotometry measurement. It demonstrates that 98% of adsorbed L-Val molecules released from HNTs within 300 min at pH 10 while the loaded MBT needs 120 h to achieve the equal ratio. Moreover, the difference of the release rate has a significant impact on the artificial crossed scratch experiment and shows a great performance gap in photographs. By comparing electrochemical impedance spectroscopy (EIS) data of three epoxy coatings, it can be seen that the epoxy coating, which was mixed with L-Val-loaded HNTs, shows a better anticorrosion ability than the epoxy coating contains MBT-loaded HNTs after immersion in 3.5 wt% sodium chloride solution for 96 h. Crucially, the pH-responsive anticorrosion material we fabricated can offer a rapid self-healing performance when the coating damaged by mechanical scratch via visual test and atomic absorption spectroscopy.
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高影响因子
FOOD AND AGRICULTURAL IMMUNOLOGY
·
2018
·
IF 2.568
Zhi-Li Xiao,Wei Tian,Zhen-Lin Xu,Yuan-Ming Sun
In this study, we develop a sensitive indirect competitive chemiluminescent enzyme immunoassay (ic-CLEIA) to detect cadmium (Cd) in cereals. A luminol-hydrogen peroxide chemiluminescence system catalysed by horseradish peroxidase (HRP) was used as the signal detecting system. The method showed a half-maximal inhibition concentration (IC50) of 0.5 ng/mL and a limit of determination (LOD) of 0.06 ng/mL. The assay indicated an effective linear range from 0.16 to 1.56 ng/mL. There were no obvious cross-reactivities with other metal ions, including Hg2+, Pb2+, As2+, Ag+, Fe3+, Cu2+, Cr2+, Au3+, Ca2+, Mg2+, Mn2+ and Zn2+. Recovery rates ranged from 79.2% to 120.0% for rice, maize, wheat, brown rice and glutinous rice samples. Twenty-five practical cereal samples were analysed, and the comparative analysis of the results showed a strong correlation (r = 0.984) between the CLEIA and the GFAAS methods. The results indicated that the ic-CLEIA developed was acceptable to screen for cadmium in cereal samples.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 14
·1703369
·
IF 13.325
Youchen Gu,Heping Shen,Chen Ye,Xuezeng Dai,Qian Cui,Jianbao Li,Feng Hao,Xiaojing Hao,Hong Lin
The thin-film photovoltaic material Cu 2 ZnSnS 4 (CZTS) has drawn worldwide attention in recent years due to its earth-abundant, nontoxic element constitution, and remarkable photovoltaic performance. Although state-of-the-art power conversion efficiency is achieved by hydrazine-based methods, effort to fabricate such devices in a high throughput, environmental-friendly way is still highlydesired. Here a hydrazine-free all-solution-processed CZTS solar cell with Na 2 S self-depleted back contact modification layer for the first time is demonstrated, using a ball-milled CZTS as light absorber, low-temperature solution-processed ZnO electron-transport layer as well as silver-nanowire transparent electrode. The inserting of Na 2 S self-depleted layer is proven to effectively stabilize the CZTS/Mo interface by eliminating a detrimental phase segregation reaction between CZTS and Mo-coated soda lime glass, thus leading to a better crystallinity of CZTS light absorbing layer, enhanced carrier transportation at CZTS/Mo interface as well as a smaller series resistance. Furthermore, the self-depletion feature of the Na 2 S modification layer also averts hole-transportation barrier within the devices. The results show the vital importance of interfacial engineering for these CZST devices and the Na 2 S interface layer can be extended to other optoelectronic devices using Mo contact.
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ACS Nano
·
2024
·
IF 15.8
Kuo Wang,Yajie Luo,Hongtu Zhan,Xiao-Xia Liu,Xiaoqi Sun
Zn metal anodes experience dendritic growth and hydrogen evolution reactions (HER) in aqueous batteries. Herein, we propose an interface regulation strategy with a trace (1.4 × 10–4 mol kg–1) all-in-one epicatechin (EC) electrolyte additive to solve the above issues and reveal the roles of individual functional groups. By the disassembly of EC into simple molecules combined with entire molecule investigations, we show that phenol and ether sites preferentially anchor on the Zn surface, while the hydroxyl group pointing outward enters Zn2+ solvation shells at the interface. It modifies the following desolvation path, which not only enables uniform deposition with the thermodynamically favored plate morphology but also inhibits HER. With these synergistic effects of trace EC additive, the lifespan of symmetric cells extends to 8.5 times that of the baseline ZnSO4 electrolyte. The capacity retention of Zn//MnO2 full batteries with N/P = 3 also increases from 59.1 to 85.6% after 500 cycles.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Jiankang Li,Liuquan Lin,Sen Zhou,Xiaoming Yang
Room-temperature phosphorescence carbon dots (CDs) show the highlighted advantages in chemical sensing and bioimaging owing to its long lifetime, however, acquiring the efficient phosphorescence of carbon dots is still encountering difficulty due to the spin prohibition. Here, we synthesized one type of CDs through one-step hydrothermal method. To be specific, the CDs displayed the blue fluorescence in aqueous, and emitted the bright green phosphorescence when being coated on the filter paper. Importantly, introducing coumarin to the CDs resulted in the distinct quenching of both its fluorescence and phosphorescence. Based on this phenomenon, we successfully established a dual-channel detection of coumarin. The fluorescence detection channel exhibited a linear range of 5–350 μM with a detection limit of 0.196 μM, while the phosphorescence detection channel achieved a linear range of 50–1000 μM with a detection limit of 0.268 μM. The further investigation revealed that IFE and SQE were mainly responsible for the fluorescence quenching of CDs, while the phosphorescence quenching was originated from the increased energy gap between the singlet and triplet states (ΔE ST ) of CDs, thus obstructing the ISC process. Moreover, we employed the CDs as the phosphorescent ink for anti-counterfeiting.
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高影响因子
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