JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Yue Zhao,Mingya Wang,Junli Shi,Mingfeng Han,Yuqi Wu,Shengling Li,Linxiu Zhao,Duanlin Cao
In this paper, a fluorescent probe methyl( E )-2-(3-(benzo[ d ]thiazol-2-yl)-2‑hydroxy -5-methylbenzylidene) hydrazine-1-carboxylate ( DYH ) based on benzothiazole was designed and synthesized. The characterization involved NMR, HRMS, and crystal structure analysis. In case of the existence of other competing cations, the probe DYH showed high-affinity for Cu 2+ , and the resultant DYH Cu 2+ showed exceptional capacity to recognize S 2− in CH 3 CN/HEPES (7/3, v/v, HEPES 0.1 M, pH = 7.3). The detection limits of DYH for Cu 2+ and DYH Cu 2+ for S 2− were 0.56 μM and 0.67 μM, respectively. It was determined that the binding stoichiometry between the DYH and Cu 2+ , as well as DYH Cu 2+ and S 2− , was 1:1 according to the job's curve. The pH of the probe and complex was stable between 4 and 10. Colorimetric experiments of the probe DYH were conducted using test paper as a carrier. Additionally, DYH was used for fluorescence imaging of Cu 2+ and S 2− in Hela cells with poor cellular toxicity and good cell permeability.
研究领域:
分析化学
·
生物医学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 9
·6869-6878
·
IF 3.708
Li Wenfeng,Ma Hengchang,Lu con,Ma Yuan,Qi Chunxuan,Zhang Zhonwei,Yang Zengming,Cao Haiying,Lei ziqiang
A novel triphenylamine-based fluorescent sensor tris((4-amino)phenylduryl)amine (m-TAPA) for Fe3+/Cu2+ ion has been developed. m-TAPA shows high selectivity and sensitivity toward Fe3+/Cu2+ over alkali and transition metal ions in aqueous solution. The possible mechanism of fluorescence quenching was that Fe3+/Cu2+ can be captured by the NH2 groups of m-TAPA to form non-fluorescent complexes, resulting in strong quenching. The detection limits of Fe3+ and Cu2+ were calculated to be 230 nM and 620 nM, respectively. Furthermore, fluorescent test strips have been prepared for convenient detection of Fe3+ and Cu2+ ions in environmental water samples, even in drinking water.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zihao Lin,Yajing Guo,Jiang Bai,Aijun Hong,Changcun Li,Yanli Wu,Fangfang Kong,Qiang Xiao
Improving the thermoelectric performance and service stability is essential for the effective use of cuprous selenide (Cu2–xSe). In this study, hexagonal boron nitride (h-BN) was incorporated into nano-Cu2–xSe, with the goal of enhancing thermoelectric performance and service stability. It was found that Cu2–xSe-0.005 wt % BN showed a higher thermoelectric figure of merit (zT) value (∼1.76 at 923 K), which was 11% greater than that of pure Cu2–xSe, mainly due to a significant reduction in lattice thermal conductivity (kL) to about 50% (0.13 W m–1 K–1). Additionally, the formation of an ion-blocking interface by hexagonal boron nitride effectively shortens the migration path of Cu+ ions, improving service stability while maintaining the contribution of Cu+ transitions to thermal conductivity. Finally, an increase in hardness of ∼11.1% was observed, reaching 0.7 GPa in Cu2–xSe-0.02 wt % BN. This research is a feasible approach to improving the service stability of Cu2–xSe.
研究领域:
材料科学
·
热电材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2018
·
IF 4.667
Xiaoyan Zhang,Jinfei Zhou,Da-Peng Yang,Shaoyun Chen,Jiale Huang,Zibiao Li
Diatom frustules with hierarchical structures have been widely investigated in many fields due to their unique optical features, excellent mechanical resistance and extraordinarily intricate pore patterns. Herein, Cu 2-x S modified diatomite has been successfully fabricated for the first time via a mild method at room temperature. The Cu 2-x S nanoparticles with diameters of 50–100 nm were uniformly distributed on the diatomite. The as-prepared Cu 2-x S-diatomite (Cu 2-x S-DE) exhibits excellent photocatalytic degradation efficiencies for MB and MO, which reach to 99.1% and 96.9% respectively in 40 min under the irradiation of UV–vis light with 20 mg photocatalyst. The degradation mechanism of the organic pollutant over the Cu 2-x S-DE/H 2 O 2 reaction system was also proposed. This work provides an effective strategy to design and prepare of the diatom-based nanomaterials with efficient photocatalytic degradation activity, which is of great value for the environmental applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2024
·Vol. 26
·期 5
·1-13
·
IF 2.1
Sun Guohao,Hu Peixin,Lu Hechao,He Qinting,Ren Fang,Wu Juan,Jiang Wei
This study focuses on the synthesis and characterization of recyclable nano-adsorbents of magnetic nanocomposites (Fe 3 O 4 @ZnO-RGO). The Fe 3 O 4 nanoparticles were used as magnetic responders, ZnO coated on the surface of Fe 3 O 4 not only captured Cu 2+ but also prevented the oxidation of Fe 3 O 4 , and reduced graphene oxide (RGO) acted as Fe 3 O 4 @ZnO carrying platform could effectively adsorb Cu 2+ . The physical and chemical performance characterization suggested that the nano-adsorbents had stable structure, good hydrophilicity, and magnetic properties. Furthermore, the research results on adsorption performance indicated that the Fe 3 O 4 @ZnO-RGO had high adsorption properties for Cu 2+ , and the adsorption rate could reach more than 98%. The adsorption process conformed to the Langmuir model and second-order adsorption kinetics, and the adsorption of Cu 2+ was mainly chemisorption, accompanied by physical adsorption. In addition, because of the special magnetic response performance, Fe 3 O 4 @ZnO-RGO could be quickly separated from the solutions for cyclic adsorption so as to avoid secondary pollution. This provided a valuable idea for the effective development of clean and efficient Cu 2+ adsorbents, and the Fe 3 O 4 @ZnO-RGO had great application potential in the field of Cu 2+ wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2016
·Vol. 408
·期 30
·8771-8778
·
IF 3.125
Zhang Fang Fang,Zou Hong Yan,Lan Jing,Wang Hong,Huang Cheng Zhi
It is very important to be able to accurately and rapidly measure the cholesterol level in the human body, as cholesterol is associated with various diseases, such as Alzheimer’s disease. In this work, a novel method of detecting cholesterol using chemiluminescence (CL) based on a newly prepared semiconductor catalyst, Cu 2− x
Se nanoparticles (Cu 2− x
Se NPs), was developed. It was found that the Cu 2− x
Se NPs strongly enhanced the CL signal by producing a large number of reactive oxygen species (ROS) in the luminol–Cu 2− x
Se NPs system. Based on the UV-vis-NIR absorption spectra, zeta potential, CL spectrum, and an investigation of the ROS, a possible mechanism for the CL was proposed. This CL-based method was successfully applied to determine cholesterol. It was found that the enhanced CL was proportional to the concentration of cholesterol over the range of 82 nM to 1.96 μM with a detection limit of 0.062 nM, and that added cholesterol was successfully detected in human serum with a mean recovery of 97 %.
研究领域:
医学诊断
·
生物化学
·
纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 34
·4183-4188
·
IF 2.073
Renjun Wang,Xiaolu Yan,Jing Sun,Xiao Wang,Xian-En Zhao,Wei Liu,Shuyun Zhu
In this contribution, DNA-templated silver nanoclusters (DNA-AgNCs) were successfully utilized as novel fluorescent probes for the detection of quinolones for the first time. The as-prepared DNA-AgNCs exhibited strong emission at 596 nm, which could be quenched by Cu2+ ions. The addition of quinolones caused restoration of fluorescence intensity of the DNA-AgNCs–Cu2+ system. This detection protocol exhibited excellent sensitivities for four kinds of quinolones. For instance, the linear ranges were from 20 to 100 nM for nalidixic acid with the limit of detection (LOD) 2.0 nM, from 5 to 120 nM for cinoxacin with the LOD 1.2 nM, from 5 to 100 nM for ciprofloxacin with the LOD 1.0 nM, and from 1 to 60 nM for moxifloxacin with the LOD 96 pM, respectively. Benefiting from high sensitivity, satisfactory recoveries were obtained for trace detection of quinolones in real samples, such as tablets and human urine.
研究领域:
分析化学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
He Li,Jiali Jiang,Jianxing Huang,Yunhui Wang,Yueying Peng,Yiyong Zhang,Bing-Joe Hwang,Jinbao Zhao
In this study, one-dimensional Cu2–xSe nanorods synthesized by a simple water evaporation-induced self-assembly approach are served as the anode material for Na-ion batteries for the first time. Cu2–xSe electrodes express outstanding electrochemical properties. The initial discharge capacity is 149.3 mA h g–1 at a current density of 100 mA g–1, and the discharge capacity can remain at 106.2 mA h g–1 after 400 cycles. Even at a high current density of 2000 mA g–1, the discharge capacity of the Cu2–xSe electrode still remains at 62.8 mA h g–1, showing excellent rate performance. Owing to the excellent electronic conductivity and one-dimensional structure of Cu2–xSe, the Cu2–xSe electrodes manifest fast Na+ ion diffusion rate. Moreover, detailed Na+ insertion/extraction mechanism is further investigated by ex situ measurements and theoretical calculations.
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
RSC Advances
·
2015
·Vol. 6
·期 4
·2678-2686
·
IF 3.84
Chunzhen Fan,Kan Li,Yalin Wang,Xufang Qian,Jinping Jia
Magnetic chitosan beads (MCBs) synthesized through a common embedding method and crosslinked with glutaraldehyde were studied for the adsorption of Cu2+ in aqueous solution. MCBs were investigated by means of hysteresis curves, thermo-magnetization curves, TGA, FTIR and XRD. Kinetic, isothermal and thermodynamic studies were applied to investigate the adsorption of Cu2+ by the MCBs. The effects of the pH value and the coexisting ions on the adsorption of Cu2+ were explored. Subsequently, the stability of the MCBs including the adsorption capacity (Qe) and the saturated magnetization (Ms) stability was investigated under various conditions. Simultaneously, FTIR and XRD were utilized to further analyze the change in the MCBs in the stability studies. The results suggested that the MCBs showed good stability without a significant loss in Qe and Ms after regeneration from five sequential cycles. The MCBs presented excellent storage stability while stored in a drying vessel for ten months. For thermal stability, the Qe and Ms of the MCBs presented similar variations after being heated in the atmosphere and in a vacuum at different temperatures for 30 h. The Qe changed slightly after being heated at 50 and 100 °C, and decreased sharply at 150 and 200 °C. The magnetization was stable in the lower temperature range (50–150 °C) and increased slightly at 200 °C. Different magnetic fields had little effect on the stability of the MCBs.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 7
·5426-5429
·
IF 1.339
Yang Peilun,Zhu Baocun,Zhao Jie,Yu Haiqin,Yan Liangguo,Wei Qin,Du Bin
Currently, growing attention has been paid to the sensitive determination and removal of Cu2+ because excessive levels of Cu2+ could do harm to organisms. Herein, a novel diethanolamine-modified magnetic fluorescent Fe3O4@ZnS nanoparticle
(MFNP) for simultaneous detection and removal of Cu2+ was designed and synthesized through dithiocarbamate linkage strategy. The characterization of MFNP was confirmed by transmission electron microscope (TEM), infrared (IR) and emission spectra. The results showed
that MFNP could quantificationally detect Cu2+ with high sensitivity and selectivity under a broad pH range (pH 4.5–9). The removal of Cu2+ was achieved by the aggregation-induced sedimentation (AIS) strategy and by external magnetic field.
研究领域:
分析化学
·
环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Congcong Wei,Dazhong Zhong,Dandan Li,Genyan Hao,Guang Liu,Jinping Li,Qiang Zhao
Hydrogen production from electrolyzed water is a mature technology and has great development prospects in terms of energy conversion and utilization. However, the kinetically sluggish oxygen-evolution reaction becomes the limiting step in the electrolysis of water . Copper-based materials have been reported as a good choice to catalyze the oxygen evolution reaction , but their performance is poor. We describe a Cu 2-x Se@CuO/copper foam core–shell structure from the in situ electrochemical oxidation of Cu 2 Se/copper foam to promote the oxygen-evolution reaction performance. The presence of a semi-metallic Cu 2-x Se core and nanostructured CuO shell at a current density of 10 mA cm −2 requires a low overpotential of 253 mV. The Tafel slope was only 73 mV dec −1 . The preparation of Cu 2-x Se@CuO on three-dimensional copper foam facilitates the reaction.
研究领域:
材料科学
·
能源转换与存储
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 1
·160
·
IF 5.719
Rongrong Si,Yehong Chen,Daiqi Wang,Dongmei Yu,Qijun Ding,Ronggang Li,Chaojun Wu
In the present study, carboxymethyl cellulose nanofibrils (CMCNFs) with different carboxyl content (0.99–2.01 mmol/g) were prepared via controlling the ratio of monochloroacetic acid (MCA) and sodium hydroxide to Eucalyptus bleached pulp (EBP). CMCFs-PEI aerogels were obtained using the crosslinking reaction of polyethyleneimine (PEI) and CMCNFs with the aid of glutaraldehyde (GA). The effects of pH, contact time, temperature, and initial Cu2+concentration on the Cu2+removal performance of CMCNFs-PEI aerogels was highlighted. Experimental data showed that the maximum adsorption capacity of CMCNF30-PEI for Cu2+was 380.03 ± 23 mg/g, and the adsorption results were consistent with Langmuir isotherm (R2> 0.99). The theoretical maximum adsorption capacity was 616.48 mg/g. After being treated with 0.05 M EDTA solution, the aerogel retained an 85% removal performance after three adsorption–desorption cycles. X-ray photoelectron spectroscopy (XPS) results demonstrated that complexation was the main Cu2+adsorption mechanism. The excellent Cu2+adsorption capacity of CMCNFs-PEI aerogels provided another avenue for the utilization of cellulose nanofibrils in the wastewater treatment field.Keywords:carboxymethylation;cellulose nanofibrils;aerogel;adsorption
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 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）