CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Junkai Hao,Hanning Song,Shuo Sun,Jing Feng,Hongben Zhang,Xuewan Zhang,Xuejiao Ren,Zhengquan Yan,Lei Hu
To improve the sensitivity and selectivity for S 2− and Fe 2+ detection in complex agricultural products, ultra-small nano CeO 2 /CuO doped carboxylated chitosan fibers (CeO 2 /CuO CCF) was constructed under microwave-assisted conditions. Not only did CeO 2 /CuO CCF possess suitable BET specific surface area, superior stability and synergistic-enhancement oxidase-like activity, trace S 2− or Fe 2+ could selectively change its oxidase-like activity accompanying with visible color changes. Under the optimized conditions, there express specific double ratiometric colorimetric linear relationships between lg( A 729 / A 343 )/lg( A 415/ A 343 ) and c S 2− or c Fe 2+ with large linear ranges. When applied for visual monitoring of S 2− and Fe 2+ in real agricultural products, the detection limits were low to 3.5 × 10 −9 mol·L −1 and 9.4 × 10 −8 mol·L −1 respectively, far below the permitted values in drinking water by World Health Organization. The mechanisms for synergistic-enhancement oxidase-like activity for CeO 2 /CuO CCF to selectively recognize S 2− and Fe 2+ were proposed. This work will provide an efficient way for visual monitoring of multiple analytes in complex agricultural products.
研究领域:
材料科学
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环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Xiaojie Lin,Xiaoxiang Zhou,Li Zhao,Jie Zhou,Hailiang Ni,Ke Huang,Yi Zhang,Xue Jiang,Xiaoli Xiong,Huimin Yu
In this work, a portable and 3D printing sulfur speciation analysis device was constructed, which effectively integrated with a vapor generation system, a microplasma chamber and a colorimetric unit. Point discharge microplasma was used for highly efficient oxidation of gaseous H 2 S to SO 2 , thus the simple and time-saving nonchromatographic speciation analysis of S 2− and SO 3 2 − was achieved by simply adjusting the plasma “on” or “off”. In this process, S 2− were converted to volatile H 2 S by acidification reaction and then oxidized to SO 2 by microplasma, prior to a specific discoloring reaction with yellow fluorescein derivative, which effectively alleviated the interference from sample matrix and further improved the analytical sensitivity. The absorbance value of fluorescein derivative at 482 nm was used for quantitative analysis of S 2− and SO 3 2 − . Under optimal conditions, the detection limit was calculated to be 6.22 μmol L −1 for both analytes in the concentration range of 30–210 μmol L −1 , while 60 μmol L −1 analytes were recognizable by the naked eye. The whole 3D-printed device was miniaturized, portable and easy to operate, with fast response time (<1 min), which was only the size of an adult's palm and equipped with one 3.7 V lithium battery for power. This method has been successfully utilized to field analysis of toxic S 2− and SO 3 2 − in real environmental water samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2016
·
IF 4.035
Haiyang Liu,Bibo Zhang,Chunyan Tan,Feng Liu,Jiakun Cao,Ying Tan,Yuyang Jiang
A simple Schiff base (BMSA) prepared from salicylaldehyde and 2-(1H-benzo[ d ]imidazol-2-yl)aniline was evaluated as an efficient fluorescent chemosensor for the selective recognition of Al 3+ and Cu 2+ over other common metal ions . This sensor could detect Al3 + in CH 3 OH/PBS with distinct emission red-shift (the detection limit 0.31 μM)and Cu 2+ in CH 3 OH/Tris-HCL (the detection limit 0.54 μM) with obvious fluorescence quenching . The obtained BMSA-Al 3+ and BMSA-Cu 2+ complexes could act as cascade sensors for detecting F − and S 2− , respectively. The recognizing behavior of BMSA toward Al 3+ and Cu 2+ has been investigated in detail through Job's Plot, FT-IR NMR , and HRMS analysis. Moreover, this chemosensor was verified to be of low cytotoxicity and good imaging characteristics for the detection of Al 3 + and Cu 2+ , and further for the recognition of F − and S 2− in living cells, suggesting that BMSA was proved to be a useful tool for tracking Al3 + /Cu 2+ and F − /S 2− ions in vivo .
研究领域:
生物化学
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分析化学
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细胞生物学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2018
·
IF 2.88
Hao Fang,Peng-Cheng Huang,Fang-Ying Wu
In this work, a simple and easily synthesized Schiff-based derivative colorimetric and fluorescent sensor ( 1 ), 4-dimethylamino-benzoic acid (2-imidazole formaldehyde)-hydrazide, was obtained for the detection of Cu 2+ and S 2− . The compound 1 exhibited dual spectral responses to Cu 2+ , that is, vivid color change and fluorescence enhancement in the presence of Cu 2+ . The detection limits were valued as 0.46 μM and 15 nM according to absorption and fluorescent response, respectively. Both of them are below the World Health Organization (WHO) guidelines for drinking water (31.5 μM). In addition, the ensemble ( 1-Cu 2+ ) selectively and sensitively detected a low concentration of S 2− . As the addition of S 2− instantly removed Cu 2+ from the ensemble ( 1-Cu 2+ ) resulting in a color change from yellow to colorless and a “turn-off” fluorescent response. The detection limit for S 2− was estimated as 0.12 μM (from fluorescent method) and 0.68 μM (from absorption method), respectively, each of which was also lower than the maximum allowable level of S 2− (15 μM) in drinking water defined by the WHO. The binding process was confirmed via UV–vis absorption, fluorescence measurements, 1 H NMR, mass spectroscopy and density functional theory calculation. What's more, successful practical application of test paper is used to inspect the S 2− which means the convenient and rapid assay in real samples can be achieved.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 40
·5329-5340
·
IF 3.1
Yixuan Yao,Fudong Zeng,Liangqiang Wu,Shuo Xing,Qingbiao Yang,Yaoxian Li
We have successfully synthesized a near-infrared fluorescent probe for the continuous detection of copper and sulfur ions. The probe has good selectivity and anti-interference ability against Cu2+ and S2−. The results show that after adding Cu2+ to the DL solution of the near-infrared fluorescent probe, Cu2+ forms a [DL + Cu2+] complex with the probe, which leads to fluorescence quenching due to the paramagnetism of Cu2+. The probe can be used for the quantitative detection of Cu2+ with a detection limit of 1.26 × 10−9 M. According to the Job's plot curve the binding stoichiometry between DL and Cu2+ is 1 : 1. Subsequently, S2− was added to the [DL + Cu2+] solution, because the precipitation dissolution equilibrium constant of CuS was Ksp = 1.27 × 10−36, so the binding capacity between Cu2+ and S2− was stronger, CuS precipitation was formed, and red fluorescence was re-released, and the quantitative detection of S2− was realized, and the detection limit was 3.50 × 10−8 M. Through bacterial imaging experiments, we found that the probe can accomplish the fluorescence imaging experiments of Staphylococcus aureus, indicating that the probe has good biopenetration and biocompatibility, and has application prospects in bioimaging and environmental monitoring. In addition, the probe DL has good suitability for Cu2+ and S2− detection in real samples.
研究领域:
分析化学
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生物医学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food & Function
·
2020
·Vol. 11
·期 12
·10568-10579
·
IF 4.171
Jing Xu,Shan Jin,Fei Gan,Hui Xiong,Zhinan Mei,Yu Chen,Guangzhong Yang
The fruits of Garcinia xanthochymus can be eaten raw or processed into jams, preserves and vinegar. They provide not only vitamin and protein nutrients, but also pharmacologically active compounds, among which polycyclic polyprenylated acylphloroglucinols (PPAPs) are a major class. According to the literature, PPAPs exhibited good anti-cancer effects. This study investigated the antitumor effects and the underlying mechanism of S1 (the regioisomeric mixture of xanthochymol and guttiferone E) and S2 (the regioisomeric mixture of isoxanthochymol and cycloxanthochymol) isolated from the fruits of G. xanthochymus. In an H22 allograft mouse model, S1 and S2 could suppress the liver tumor growth and phosphorylation of STAT3. Computational modeling showed that S1 and S2 could form hydrogen bonds with the SH2 domain of STAT3. In HepG2 and MCF-7 cell lines, S1 and S2 downregulated the expression of p-STAT3Tyr705. Moreover, S1 and S2 inhibited the phosphorylation of JAK2 and Src, which are the upstream kinases of STAT3, and the expression of various STAT3-regulated genes, including anti-apoptotic (Bcl-XL, Mcl-1 and survivin), proliferative (cyclin D1) and angiogenic (VEGF) genes. As a result, S1 and S2 arrested the cell cycle and induced cell apoptosis, which were proved by the activation of cleaved caspase-3 and caspase-8. These results demonstrated that S1 and S2 from G. xanthochymus exhibited antitumor effects through the inactivation of STAT3, and could be promising candidates for cancer treatment.
研究领域:
药理学
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肿瘤学
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分子生物学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 62
·35939-35947
·
IF 3.049
Chunyan Dai,Linhua Zhu,Guangying Chen,David M. Haddleton
Hydroxyapatite (HAP) is a widely used biomaterial for bone tissue substitution due to its chemical similarity with the natural bone. Defect-related luminescent HAP materials have the same chemical composition as normal HAP and excellent biocompatibility. However, only few works have focused on the defect-related luminescent HAP materials on bone regeneration. In this work, we systematically investigated the bone regeneration pathway induced by nanostructured particles using defect-related luminescent hydroxyapatite (S2) materials. We monitored the subcellular distribution and location of S2 during osteoblast differentiation with the property of defect-related luminescence. Nano-scale S2 could be internalized by osteoblasts (OBs) via caveolae-mediated endocytosis and macropinocytosis. S2 incorporated into the lysosomes dissolved and released calcium ions for the formation of mineralized nodules. Extracellular S2 also promoted bone regeneration as a nucleation site. Taken together, the physical properties of hydroxyapatite control the bone regeneration pathway in osteoblasts.
研究领域:
生物材料科学
·
组织工程
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细胞生物学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Technological Sciences
·
2023
·Vol. 66
·期 7
·2059-2068
·
IF 4.6
Gao Ling,Xie YuLin,Tong Yan,Xu Miao,You JiaLe,Wei HuiPing,Yu XiangXiang,Xu SiQi,Zhang Yi,Che Yong,Tang Ya,Suzuki Kota,Kanno Ryoji,Zhao GuoWei
Argyrodites, Li 6 PS 5 X ( X =Cl, Br, I), have piqued the interest of researchers by offering promising lithium ionic conductivity for their application in all-solid-state batteries (ASSBs). However, other than Li 6 PS 5 Cl (651Cl) and Li 6 PS 5 Br (651Br), Li 6 PS 5 I (651I) shows poor ionic conductivity (10 −7 S cm −1 at 298 K). Herein, we present Al-doped 651I with I − /S 2− site disordering to lower activation energy ( E a ) and improve ionic conductivity. They formed argyrodite-type solid solutions with a composition of (Li 6−3 x Al x )PS 5 I in 0⩽ x ⩽0.10, and structural analysis revealed that Al 3+ is located at Li sites. Also, the Al-doped samples contained anion I − /S 2− site disorders in the crystal structures and smaller lattice parameters than the non-doped samples. Impedance spectroscopy measurements indicated that Al-doping reduced the ionic diffusion barrier, E a , and increased the ionic conductivity to 10 −5 S cm −1 ; the (Li 5.7 Al 0.1 )PS 5 I had the highest ionic conductivity in the studied system, at 2.6×10 −5 S cm −1 . In a lab-scale ASSB, with (Li 5.7 Al 0.1 )PS 5 I functioned as a solid electrolyte, demonstrating the characteristics of a pure ionic conductor with negligible electronic conductivity. The evaluated ionic conduction is due to decreased Li + content and I − /S 2− disorder formation. Li-site cation doping enables an in-depth understanding of the structure and provides an additional approach to designing better-performing SEs in the argyrodite system.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Guobin Mao,Yuan Zeng,Chunmin Qiu,Guangmiao Ding,Leyao Li,Lixin Ma,Junbiao Dai,Wen Yin,Yingxin Ma
Accurately monitoring the freshness of high-protein foods has significant implications for both food safety and public welfare. Since a large amount of hydrogen sulfide (H 2 S) is produced during spoilage-related processes, abnormal H 2 S levels are often considered an important indicator of food spoilage. Therefore, we synthesized novel nanoparticles (NPs) containing Silicon (Si) dots and CdTe quantum dots to accurately assess the amount of sulfide ions (S 2− ) and thus the quality of high-protein foods in the early stage of storage. As the concentration of S 2− increased, the fluorescence intensity of Si/CdTe NPs at λ em = 488 nm increased, while the fluorescence intensity at λ em = 620 nm was quenched. The fluorescence intensity ratio (F 620 /F 488 ) was negatively linearly correlated to S 2− concentrations in the range of 1–20 μM, with a detection limit of 0.3 μM. Furthermore, to achieve portable detection, we mixed Si/CdTe NPs with sodium carboxymethyl cellulose to prepare effective visual fluorescent sensing paper chips, which exhibited ideal porous structure, good particle dispersion, and excellent fluorescence properties. Incubating the paper chips with high-protein foods allowed for accurate monitoring of food freshness during storage. Therefore, this approach provided a reliable and portable method to determine H 2 S concentration using a novel concept to ensure the freshness and safety of high-protein foods.
研究领域:
食品科学
·
分析化学
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材料科学
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生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2025
·
IF 12.1
Yan Wang,Zhiyu Zhou,Xiaofan Zhang,Zheng Liu,Huifang Lv,Xianghu Huo,Chunming Gao,Bing-Ni Gu,Yang Zhao,Zexiang Chen,Ruxiang Xu,Yu-Lun Chueh
Multicomponent transition metal heterostructures is constructed through a heteroatomic doping method sandwiched by the dual carbon layers. The promising strategy combines iron and manganese ions into a novel Fe 2.57 Mn 0.43 O 4 heterostructure on the surface of the rGO nanosheets, followed by sulfur-doping and calcination processes to achieve S 2− -doped-rGO@Fe 2.57 Mn 0.43 O 4 @C heterostructure. Note that S 2− -doped Fe 2.57 Mn 0.43 O 4 nanorods encapsulated by the carbon coating layers on the rGO nanosheets as the backbone are expected to restrict nanorods from collapsing during the charge–discharge processes. The S 2− -doping in heterostructures can build stabilized solid electrolyte interphase on or near the surface of the Fe 2.57 Mn 0.43 O 4 nanorods. Moreover, Mn heteroatomic doping can optimize the crystalline structure of the Fe 2.57 Mn 0.43 O 4 . The exposed active sites and kinetics of S 2− -doped-rGO@Fe 2.57 Mn 0.43 O 4 @C heterostructure are significantly improved. As a result, the as-assembled batteries can achieve a high capacitance of 1410 F g −1 at 1 A g −1 with a high capacitance retention of 75% at 16 A g −1 . Furthermore, the batteries are guaranteed a prolonged cycle life of 1000 cycles with 92.3% capacitance retention. The as-assembled NiAl-LDH (Ni-Al layered double hydroxide)//S 2− -doped-rGO@Fe 2.57 Mn 0.43 O 4 @C battery leads to excellent electrochemical properties (65.4 Wh kg −1 at 763.2 W kg −1 , 9925.8 W kg −1 at a 43.9 Wh kg −1 ).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）