BIOELECTROCHEMISTRY
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2013
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IF 3.947
Ying Zhang,Xuejing Wang,Lei Wang,Miao Yu,Xiaojun Han
The baicalin and baicalein are the major flavonoids found in Radix Scutellariae , an essential herb in traditional Chinese medicine for thousands of years. The interactions of the baicalin and baicalein with lipid bilayer membranes were studied using cyclic voltammetry and UV–Vis spectroscopy. The thickness d of supported bilayer lipid membranes was calculated as d = 4.59(± 0.36) nm using AC impedance spectroscopy . The baicalein interacted with egg PC bilayer membranes in a dose-dependent manner. The responses of K 3 Fe(CN) 6 on lipid bilayer membrane modified Pt electrode linearly increased in a concentration range of baicalein from 6.25 μM to 25 μM with a detection limit of 0.1 μM and current-concentration sensitivity of 0.11(± 0.01) μA/μM, and then reached a plateau from 25 μM to 50 μM. However the baicalin showed much weaker interactions with egg PC bilayer membranes. UV–Vis spectroscopy also confirmed that the baicalein could interact with egg PC membranes noticeably, but the interaction of baicalin with membranes was hard to be detected. The results provide useful information on understanding the mechanism of action of Radix Scutellariae in vivo.
研究领域:
药理学
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生物化学
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DOI
PubMed
高影响因子
DYES AND PIGMENTS
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2016
·
IF 4.055
Chenglong Wang,Lili Wang,Yi Huang,Xuying Nan,Qinguo Fan,Jianzhong Shao
A novel reactive organic pigment complex was prepared by 3-(Trimethoxysilyl) propyl methacrylate encapsulated on the surface of the organic pigment. The preparation conditions of the reactive organic pigment complex were optimized and the properties were characterized by FT-IR, DLS and UV–vis. The reactive organic pigment complex was used in blue-light curable pigment inks. The results showed that the photo-polymerization performance of the novel blue light curable pigment ink system was markedly increased in comparison with conventional pigment-based ink systems. The physical shielding effect of pigment particles on photo-polymerization performance can be reduced by increasing the photoinitiator concentration and irradiation intensities. The colorfastness to crocking of printed fabric was remarkably improved. However, the particle size of reactive organic pigment complex was slightly increased.
研究领域:
材料科学
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化学
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纺织工程
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印刷技术
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DOI
高影响因子
Optoelectronics Letters
·
2014
·Vol. 10
·期 3
·164-167
·
IF 0
Yang Ai-ling,Li Shun-pin,Wang Yu-jin,Bao Xi-chang,Yang Ren-qiang
By adjusting pH values of reactant system, the mass ratio of stabilizer/water and aging temperature, size controllable spherical silver nanoparticles (NPs) were synthesized. The properties of silver NPs are characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and ultraviolet visible (UV-VIS) absorption spectra. Within the pH values of 7.0–11.0, the aging temperature of 80 °C is better to improve silver NPs in shape to nearly sphere, concentrate size distribution and reduce aggregation than the aging temperature of 25 °C. The shape and dispersibility of silver NPs are the best when the pH of the reactant system is within 7.0–8.0. With pH of 7.5, aging at 80 °C, and stabilizer/water mass ratio of 1%, the spherical silver NPs with sizes of 50–70 nm were synthesized. The results are promising to be used to synthesize core/shell NPs when silver NPs are as core.
研究领域:
纳米技术
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材料科学
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化学
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DOI
Materials Today Communications
·
2023
·
IF 3.8
Yuchun Ji,Zhengde Li,Laiping Zhang,Jilin Wang,Wenbiao Li,Wenzhuo Chen,Guoyuan Zheng,Fei Long,Zhengguang Zou
In this paper, a novel boron nitride hollow microtube (BNHM) structure by annealing assisted high-pressure etching method. The products were characterized by XRD , FTIR, Raman, XPS , SEM, TEM, TGA , BET, UV–vis, and PL. The result shows that the sample displayed a one-dimensional hollow tube structure directionally covered with nanosheets . The average inner diameter of the hollow tube is 1 µm with a length of 2–4.5 µm. And the wall thickness of the hollow tube structure is about 100 nm. In addition, the band gap value of the sample is 5.51 eV presenting the strongest absorption peak at 225 nm. The specific surface area of the sample is 272.6 m 2 ·g −1 , showing good adsorption efficiency on Congo red (absorbed 75% in 5 min). Meanwhile, the possible growth mechanism of BNHM is also discussed.
研究领域:
材料科学
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纳米技术
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化学
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表面科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2017
·
IF 6.065
Yannan Chen,Gangqiang Zhu,Mirabbos Hojamberdiev,Jianzhi Gao,Runliang Zhu,Chenghui Wang,Xiumei Wei,Peng Liu
Ag 2 O nanoparticles-loaded Bi 5 O 7 I microspheres forming a three dimensional Ag 2 O/Bi 5 O 7 I p – n heterojunction photocatalyst with wide-spectrum response were synthesized in this study. The results of transmission electron microscopy observations revealed that the Ag 2 O nanoparticles with the diameter of ca. 10–20 nm were distributed on the surfaces of Bi 5 O 7 I nanosheets. The as-synthesized Ag 2 O/Bi 5 O 7 I exhibited an excellent wide-spectrum response to wavelengths ranging from ultraviolet (UV) to near-infrared (NIR), indicating its potential for effective utilization of solar energy. Compared with pure Bi 5 O 7 I, the Ag 2 O/Bi 5 O 7 I composite also demonstrated excellent photocatalytic activity for the degradation of Bisphenol A and phenol in aqueous solution under visible LED light irradiation. Among samples, the 20% Ag 2 O/Bi 5 O 7 I composite photocatalyst showed the highest photocatalytic activity for the degradation of Bisphenol A and phenol in aqueous solution. In addition, the 20% Ag 2 O/Bi 5 O 7 I composite also exhibited a photocatalytic activity for the degradation of Bisphenol A under NIR light irradiation. The improved photocatalytic activity is attributed to the formation of a p - n heterojunction between Ag 2 O and Bi 5 O 7 I, allowing the efficient utilization of solar energy (from UV to NIR) and high separation efficiency of photogenerated electron-hole pairs. The present work is desirable to explore a possible avenue for the full utilization of solar energy.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
·
IF 3.232
Lijuan Huang,Longyan Xiang,Yan Zhang,Yongan Wang,Zhiyong Nie
The simultaneous detection of K + and Tl + can serve as a toxicological diagnostic tool for thallium poisoning. Colorimetric-reaction-based nanoprobes have emerged as promising sensors for the rapid and ultrasensitive detection of molecular species in simple systems. However, the development of viable screening tools for multicomponent analysis in complex systems remains challenging owing to interference from coexisting materials in the media. Herein, a simple chemical sensor array based on the peroxidase-like activity of gold nanoparticles modified with single-stranded DNA (AuNPs-ssDNA) and chemometrics was developed for the simultaneous detection of K + and Tl + in aqueous solutions and serum. The use of a K + adapter conferred high selectivity to the developed method. Optimized AuNPs-ssDNAs were used to construct a sensor array, which together with chemometrics provided fingerprints that can facilitate the simultaneous analysis of multiple components. The developed colorimetric reaction in combination with the chemometrics assay was directly used as a biosensor array, which exhibited detection limits of 107.33 nM for K + and 19.26 nM for Tl + . The developed method could potentially serve as a diagnostic technique for investigating thallium poisoning and toxicology.
研究领域:
分析化学
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毒理学
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环境科学
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纳米技术
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Lijuan Chen,Yulin Xu,Yufei Fang,Xiaoyang Qu,Zhiying Yu,Ling Dong,Jianbo Chen
Red yeast rice (RYR) is a traditional fermented product produced by cultivating rice with the filamentous fungus Monascus purpureus . It has been widely utilized in East Asia both as a natural food colorant and as a lipid-lowering herb. Rapid quality assessment is critical for the production, transaction and utilization of RYR. Since empirical evidence suggests that the chromatic properties of RYR correlate closely with its quality, UV–Vis spectrophotometric analysis at specific wavelengths has become a common proxy for rapid quality evaluation of RYR. However, there has been no universal consensus on the selection of these wavelengths. In this study, an active pharmaceutical ingredient (API)-correlated wavelength selection strategy was proposed to ensure analytical accuracy and biological interpretability of the selected UV–Vis wavelengths for the rapid quality assessment of RYR. Integrated bioinformatic analysis confirmed that Monascus pigments (e.g., monascin, rubropunctatin, rubropunctamine) and monacolin K were the dominant pharmacologically active components of RYR. Notably, both the profiles and concentrations of these pigments varied significantly across RYR samples from different manufacturers. Through systematic correlation analysis and principal component analysis (PCA), three optimal characteristic wavelengths were identified: 570 nm (associated with monascin and rubropunctamine), 450 nm (associated with rubropunctatin), and 230 nm (roughly associated with monacolin K). This work not only establishes chemically rational, API-informed UV–Vis wavelengths for standardized RYR quality assessment, but also offers a transferable methodological framework for the rapid quality control of other pigment-rich fermented products.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Han Wu,Yu Wang,Duan Jiang,Xiaomin Chen,Jingping Tan,Zhenlin Xu,Hongtao Lei,Xiangmei Li
Background Mercury is one of the most toxic heavy metal contaminants that can be harmful to human health through the food chain. Recently, the colorimetric detection of heavy metals based on nanozyme catalytic activity has received extensive interest due to the simplicity, signal visibility and suitability for in situ detection. However, the majority of these nanozymes that can be utilized for detecting mercury with high synthesis temperature and complicated synthesis methods, which limited their practical application. Results In this work, flower-like ZnO@Pt composites were simply synthesized at room temperature , the flower-like structure and the high electron mobility of ZnO endow ZnO@Pt with stronger peroxidase-like activity. Consequently, dual-mode (UV–vis and smartphone) colorimetric sensors were designed to detect Hg 2+ . In UV–vis mode, the Hg 2+ concentration linear range was 10–400 nM, and the limit of detection (LOD) was 0.54 nM. In smartphone mode, the Hg 2+ concentration linear range was 50–1250 nM, and the LOD was 29.8 nM. A parallel analysis in 3 real water samples was confirmed by ICP-MS, the results showed good correlations (R 2 > 0.98), indicating the practical reliability of these sensors. Significance The novel flower-like ZnO@Pt composites with high stability, catalytic activity and Hg 2+ response were simply synthesized at room temperature, simplifying the synthesis steps and reducing costs. The sensitivity of the developed colorimetric sensor in UV–vis mode was 3–145 times higher than that of the similar methods. The colorimetric sensor in smartphone mode broadened the detection range and improved the portability of Hg 2+ detection. Thus, the dual-mode (UV–vis and smartphone) colorimetric sensors providing new detection modes for rapid monitoring of Hg 2+ in environmental water.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2016
·
IF 2.653
Kangming Xiong,Caixia Yin,Jianbin Chao,Yongbin Zhang,Fangjun Huo
In this work, two high selective and sensitive fluorescent probes for ClO − , 7-Hydroxycoumarin and 4-Hydroxycoumarin were designed. The reaction mechanism that we speculated was the oxidized ring opening reaction and hydrolysis. The detection could be realized in quasi-aqueous phase and the detection limits of probe [7] and probe [4] for ClO − were found to be 56.8 nM and 70.5 nM. Furthermore, the probes can be used to cell imagings.
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DOI
高影响因子
Separations
·
2026
·Vol. 13
·期 9
·254
·
IF 3.5
Shanmei Li,Mingxuan Li,Jianping Meng,Ligang Yu
Rapid and accurate quantification of residual guar gum in bauxite slurry flocculation is a critical bottleneck for closed-loop control of flocculant dosage. In this study, we systematically compared the anti-interference performance of the two UV-Vis spectrophotometer approaches, the single-wavelength absorbance method (A263) and the peak-trough difference method (ΔA), in complex slurry matrices. Our results revealed that the two methods respond differently to pH and salt concentration variations, leading to the proposal of a dual-mode synergistic detection strategy. The A263method provides quantification under the specific conditions tested within the ranges of pH 3.0–8.0 and CaCl2concentration below 4.5 mmol/L. Beyond these boundaries, deviations from the Beer-Lambert law occurred, attributable to conformational transitions or salting-out aggregation of the polymer chains. In contrast, the ΔA method partially mitigated background drift through differential calculation and exhibited a more stable signal trend than A263across the tested ranges (pH 2.0–11.0, CaCl20–18 mmol/L), suggesting its potential utility as a semi-quantitative indicator in challenging matrices. However, its quantitative precision was constrained by small absolute signal values and systematic dependence on pH and salt conditions. Based on these findings, we propose a synergistic strategy-preferring the A263method under routine conditions while recommending the ΔA method for high-salinity or wide-pH scenarios- and accordingly define the preliminary applicability boundaries based on signal response observations at a single concentration. Flocculation–sedimentation tests confirmed that the method successfully determined the optimum dosage (5.0 g/kg dry slurry), at which the residual concentration in the supernatant correlated negatively with the sedimentation rate (R2> 0.95). The supernatant matrix after sedimentation (pH ≈ 7.1, low ionic strength) fell exactly within the safe window. This work provides a methodological reference for spectrophotometric quantification of trace organics in turbid, saline, and pH-variable slurry systems, and lays an analytical foundation for intelligent dosage control in bauxite slurry dewatering.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Binhong Yu,Ziyan Chen,Zhiyuan Sun,Chengjun Yu,Zhenni Lu,Songshan Zeng
Hydroxypropyl cellulose (HPC) forms semi-transparent cholesteric liquid crystals (CLCs) under lyotropic conditions, exhibiting concentration- and temperature-dependent structural colors, covering the spectral region from ultraviolet (UV) to near-infrared (NIR). Notably, HPC CLCs exhibit a milky-white color against a white background owing to the incoherent scattering. Inspired by basal melanin-mediated color saturation between blue and white Steller's jay feathers, black backgrounds significantly enhance the saturation of structural colors by suppressing multiple incoherent scattering. Leveraging this mechanism, we propose a facile three-dimensional (3D) integration method for fabricating thermoresponsive and extreme-condition-resistance devices, composed of HPC CLCs with structural colors and thermochromic powders (TCPs) with a color switch between black and white. A single device displays color transitions among black, blue, green, red, and white, resulting from the synergistic effects of helical pitch modulation and dynamic incoherent scattering upon temperature stimuli. Intriguingly, coupling conductive carbon-oil substrates with hybrids enables electrothermal multicolor displays through Joule heating effects. Furthermore, the devised hybrids show great potential in anti-counterfeiting, smart labeling, camouflage, and information encryption through programmable TCP patterning beneath HPC CLCs. This work pioneers a new paradigm for synergistic integration of stimuli-responsive photonic crystals with adaptive absorbers, enabling scalable fabrication of color-switchable devices with customized control capabilities.
研究领域:
材料科学
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高分子科学
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光学
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光子学
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热致变色
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软物质物理
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纳米技术
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显示技术
·
安全技术
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiaolong Li,Yulu Tang,Jundi Wan,Yahui Zhang,Dongjun Lv,Mingyuan Guo,Yongning Ma,Yuhao Yang
UV–vis–NIR photodetectors are of great importance to extensive applications, while they are limited by the low photon utilization and narrow light response range inherent in a single material. To overcome these limitations, we propose the construction of heterojunction photosensitive materials featuring a hollow structure. In this study, Y-type titanylphthalocyanine nanoparticles (Y-TiOPc NPs) and hollow ZnS nanotubes (ZnS NTs) are employed to fabricate a bulk heterojunction photosensitive material (Y-TiOPc NPs:ZnS NTs). This composite material exhibits a significant cavity enhancement effect, resulting from multiple light reflections and outstanding light absorption spanning from 365 to 1060 nm. The photodetector based on Y-TiOPc NPs:ZnS NTs (referred to as Y:ZT-PD) demonstrates remarkable photodetection capabilities, including photomultiplication phenomena. Specifically, it achieves a high external quantum efficiency of 24042%, an impressive photoresponsivity (R) of 101967 mA/W, and an excellent specific detectivity (D*) of 1.56 × 1012 Jones at 0.01 mW/cm2. Additionally, the multiperiod time-resolved photocurrent response curves exhibit rapid and stable responses across different wavelengths. Characterization results indicate that these exceptional performances primarily arise from the cavity enhancement effect of ZnS NTs and the hole-injection effect resulting from interfacial trapped electrons. Consequently, the outstanding performance, coupled with the broad spectral range and stability, positions the hollow bulk heterojunction as a promising material for the next generation of broadband photodetectors.
研究领域:
材料科学
·
光电子学
·
纳米技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）