JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Dadao Wang,Jian Li,Zhifeng Xu,Yeran Zhu,Guoxin Chen
To improve the visible light utilization and adsorption capacity for combined pollutants (Tetracycline and Cu 2+ ), novel flower-like BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 composite has been successfully synthesized for the first time via a simple two-step process, surfactant-free hydrothermal route and solvothermal method . The crystal structures, chemical compositions , morphologies, optical and photocatalytic properties of the as-prepared samples were characterized by the techniques of XRD , XPS, SEM, HRTEM , BET, UV–vis DRS, and Photocurrent tests (PT). The synthetic sample with 4:1:20 (S5) mass ratio of BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 possessed the highest adsorption capacity and photocatalytic performance simultaneously in all of the as-prepared composites. Adsorption experiment (model 1 and model 2) suggested that there was not only competitive adsorption but also synergistic adsorption mechanisms between Cu 2+ and TC. Compared to pure BiVO 4 , and BiVO 4 /Bi 2 Ti 2 O 7 , BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 displayed more superior photodegradation efficiency with 97.22% removal of TC (10 mg/L) in 60 min, where the optimal conditions were catalyst dosage 1.00 g/L and initial pH at 6.0. In addition, radical trapping experiments revealed that the photo-induced active species superoxide radical ( O 2 − ) and holes (h + ) were the predominant active species in the photocatalytic system. These features demonstrate that the BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 has great application potential for combined pollutants’ removal from water.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Jun Zhang,Tingyang Xing,Min Zhang,Yunlong Zhou
Surface-enhanced Raman scattering (SERS) techniques benefit from the development of various substrates ranging from noble metal to semiconductor materials. Semiconductor substrates have been assumed to construct more specific structures and designable surface chemistry than noble metal substrates. Therefore, the development of semiconductor substrates may lead to the selective recognition of target molecules, more stable SERS spectra, and even low-cost fabrication of SERS substrates. In this paper, we disclose semiconductor supernanoparticles formed by a self-limiting assembly process with stable properties, easy scale-up fabrication, and high SERS enhancement. The detected concentration of analytes reaches as low as 10 −8 M. The built-in hotspots and self-doping in suprananoparticles provide strong electromagnetic enhancement, and the molecular resonance and charge transfer with the target molecule contribute to chemical enhancement. Discrete dipole approximation simulation was used to further confirm the SERS enhancement mechanism. Cu 2-x S supernanoparticles paved a new way to construct novel semiconductors with SERS activity.
研究领域:
材料科学
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分析化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2016
·Vol. 4
·期 23
·4119-4129
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IF 4.872
Xiaolong Liu,Xinyi Lin,Ming Wu,Ruhui Lin,Buhong Li,Jingfeng Liu
Considerable efforts have been made to incorporate both diagnostic and therapeutic functions into a single nanoplatform for biomedical applications. Herein, we report the synthesis and characterization of magnetite-loaded polymeric micelles (referred as SCDP-LA) for targeted magnetic resonance imaging (MRI) and photothermal therapy of hepatocellular carcinoma (HCC), by using an amphiphilic biocompatible polymer of lactobionic acid-modified 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polyethylene glycol)-2000] (DSPE-PEG-LA) for the micelle formation. A cluster of SPION@Cu2−xS is densely encapsulated inside the hydrophobic core of the micelles, which offers both highly sensitive MRI and an excellent photothermal effect. The LA-modified PEG outlayer makes this micelle stable in aqueous solution. Due to the targeting ligand of LA, the SCDP-LA clusters could be selectively internalized into the hepatocellular cell line (HepG2 cells) but not into HeLa cells. In addition, the targeted ability of the SCDP-LA aqueous solution was further confirmed by enhanced MRI with a shorter T2 relaxation time in HepG2 cells. Meanwhile, it also demonstrates excellent performance to produce significantly enhanced local photothermal killing efficiency against HepG2 cells under NIR laser irradiation. In summary, the present multifunctional nanoplatform based on SPION@Cu2−xS nanoclusters will be a promising theranostic platform for targeted MRI-guided photothermal therapy.
研究领域:
生物医学工程
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肿瘤学
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DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Yu-Jie Xi,Zi-Rong Zhou,Haris Niamat,Jianmin Chen,Feng Wang
In this study, a novel CdSe@PEI-PVP luminescent hydrogel was constructed by using MPA-CdSe quantum dots (QDs) as a single emitter and hydrogen bond cross-linking network between highly branched polyethyleneimine (PEI) and polyvinylpyrrolidone (PVP) as a hydrogel skeleton, in which PEI also works as a passivation ligand for MPA-CdSe quantum dots. Utilizing the dual emission of MPA-CdSe quantum dots and adjusting the surface state of MPA-CdSe with PEI and Cd 2+ , CdSe@PEI-PVP hydrogel can emit bright white light as a whole. Furthermore, CdSe@PEI-PVP shows specific recognition for Cu 2+ , luminescent color changes from bright white to orange when Cu 2+ is added, which enables CdSe@PEI-PVP hydrogel to serve as a fluorescent probe for ion detection. The luminescent hydrogel has great self-healing ability and reversible morphological thermal responsiveness, existing as a white luminescent hydrogel at room temperatures and transforming into a pale green luminescent solution at high temperatures.
研究领域:
材料科学
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分析化学
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环境科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Dongxu Zhang,Yanhong Liu,Baodong Mao,Haitao Li,Tianyao Jiang,Dongqi Zhang,Weixuan Dong,Weidong Shi
Electrochemical nitrogen reduction reaction (NRR) is considered as one of the most promising methods for NH3 synthesis under room temperature and ambient pressure. A grand challenge of NRR is the development of efficient electrocatalysts, for which the delicate nanostructuring of catalysts plays an important role. Herein, a series of Fe-doped Cu2–xS quantum dots (QDs) are synthesized with multiple active sites and interface engineering, in which the double-phase heterostructure plays a key role for boosting NRR activity. The yield of NH3 was obviously improved with the increase of Fe content from 0 to 3% but started to decrease with Fe from 3 to 9%. The optimized Fe3%–Cu2–xS QDs show an outstanding NH3 yield of 26.4 μg h–1 mg–1cat at −0.7 V (vs the reversible hydrogen electrode), which is 5 times higher than that of Cu2–xS QDs. More importantly, we observed that the highest NRR activity in Fe3%–Cu2–xS QDs was ascribed to the formation of an inherent double-phase heterostructure of Cu2–xS/Cu5FeS4, whereas the complete conversion to single-phase Cu5FeS4 with increased Fe doping (9%) resulted in the activity decrease. Further, N2 temperature-programmed desorption and electrochemical impedance spectra characterizations confirm the stronger chemical adsorption of N2 and faster charge transfer in the Cu2–xS/Cu5FeS4 QDs. A plausible mechanism was proposed for the double-phase Cu2–xS/Cu5FeS4 heterostructure, where the interface provides efficient charge transfer and more active sites of Cu, Fe, and S for the synergetic adsorption and activation of N2. Our work provides a simple strategy for the design of NRR electrocatalysts, which may also bring new inspiration for the preparation of the inherent double-phase heterostructure within other doped QDs.
研究领域:
材料科学
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电化学
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催化科学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2019
·Vol. 26
·期 10
·10174-10187
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IF 2.914
Ren Hong-shan,Cao Zhan-fang,Wen Xin,Wang Shuai,Zhong Hong,Wu Zai-Kun
In this paper, a magnetic nano-Fe 3 O 4 /triethanolamine/GO composite (TEA-GO-FE) was prepared by using graphene oxide (GO), triethanolamine (TEA), and ferric chloride. The result indicates that triethanolamine acted as an important role for the growing of Fe 3 O 4 and adsorption ability of composite material. The synthesis mechanism of TEA-GO-FE was investigated through the medium of SEM-EDS, XRD, FT-IR, and TEM. The characterization results indicated Fe 3 O 4 nanoparticles have been successfully loaded on the surface of graphene oxide and they were encapsulated by TEA and have excellent stability. According to the results of XRD, the general particle size of Fe 3 O 4 on TEA-GO-FE was 27.5 nm. In order to understand the adsorption properties of TEA-GO-FE for Pb 2+ and Cu 2+ , this article uses a static adsorption study method. The optimized adsorption conditions are as follows: pH = 5.0, temperature is 293.15 K, and the ion concentration is 100 mg/L. Under the optimized prerequisites, the adsorption capacities of Pb 2+ and Cu 2+ were 121.5 mg/g and 68.7 mg/g, separately. Through thermodynamic as well as kinetic studies, the adsorption process of Pb 2+ and Cu 2+ on TEA-GO-FE is a self-heating process.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2023
·
IF 6
Ying-Peng Zhang,Wei-Ya Niu,Yun-Shang Yang,Zu-Feng Zhang,Yi-Zhen Yuan,Hui-Chen Guo,Hong-Rui Zhang
A smart low-molecular-mass organic gelator based on naphthalene-pyrazoline has been designed and synthesized. The gelator G can form a thermo reversible stable gel in tert -butanol, cyclohexane, cyclohexanol, and DMSO through self-assembly, it emits blue and yellow-green fluorescence under ultraviolet radiation. Notably, it has multiple stimulus responses of light, heat, shock and ion. In addition, it could act as an efficient fluorescent probe for the selective sensing of Cu 2+ in the solution containing water. The detection limit of Cu 2+ in THF deionized aqueous solution (V:V = 9:1) is 5.65 × 10 −8 M. The complex ratio of G to Cu 2+ is 1:1. In addition, the G has good biocompatibility in living cells.
研究领域:
化学
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材料科学
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分析化学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2021
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IF 3.08
Yue Li,Linna Guo,Tiesheng Li,Bowen Yang
The ultra-small Lu6O5F8: 1%Er3+/10%Yb3+ up-conversion nanoparticles (UCNPs) were prepared via a co-precipitation method and used for detection of metal ions . Compared with other metal ions (Na+, Mg2+, Al3+, Fe2+, Co2+, Cd2+, etc), the up-conversion luminescence (UCL) intensity was reduced by 90% in the presence of Cu2+. Moreover, Strong quenching (65%) of the emission was observed upon the addition of Cu2+ in the concentration range of 0–10 μM. Meanwhile, the Cu2+ luminescence quenching mechanism was studied in detail. Under the 980 nm (1550 nm) excitation, the red UCL intensity of (Lu0.79Y0.1)6O5F8: 1%Er3+/10%Yb3+ and (Lu0.85Gd0.04)6O5F8: 1%Er3+/10%Yb3+ UCNPs enhanced about 4.67 (19.3) times and 3.95 (8.89) times than that of Y3+, Gd3+-absent samples, respectively. The temperature-sensing effect of Lu6O5F8: 1%Er3+/10%Yb3+ was also studied in detail, including not only this thermally coupled level (Er3+ 2H11/2, 4S3/2), but also the non-thermally coupled levels (Er3+ 2H11/2, 4F7/2). The absolute (S a ) and relative sensitivity (S r ) of Lu6O5F8: 1%Er3+/10%Yb3+ based on non-thermally coupled levels is much higher than that based on thermally coupled levels in the 293–473 K range. The maximum S a and S r is 0.087 and 0.0185 K −1 at 293 K. These meaningful results indicate that Lu6O5F8: 1%Er3+/10%Yb3+ materials have broad prospects in UCL multifunctional applications.
研究领域:
材料科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Chenglu Zhang,Shiru Nie,Libo Shang,Chang Liu,Yanpeng Zhang,Yang Zhang,Jinghao Guo
A dual responsive and “turn-on” fluorescent probe NapL with large Stokes shift (115 nm) and large fluorescence emission (585 nm) was designed, synthesized and investigated. NapL has high selective and suitable sensitive (LOD = 82.6 nM) towards Cu 2+ over a wide pH range (7.4–12.1) through a fluorescence “turn-on” mechanism and with rapid response to Cu 2+ (30 s) in complex environments. Furthermore, NapL is sensitive toward pH changes within range (7.4–2.1) with obvious "turn - on" effect (about 37- fold). The sensitive detection characteristics of Cu 2+ can be ascribed to the coordination performance of N and O atoms to Cu 2+ , whereas pH responsiveness is ascribed to the protonation of imino group. NapL has been made into convenient and low-cost pH test strip for detecting pH range (7.4–2.1), and it has also been successfully used for the detection of Cu 2+ in MCF-7 breast cancer cells under neutral conditions.
研究领域:
分析化学
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生物医学
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材料科学
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DOI
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 34
·4376-4381
·
IF 2.378
Hong Yan Zou,Fang Fang Zhang,Qing Juan Guo,Tong Yang,Cheng Zhi Huang
The sensitive and rapid quantification of lysozymes (Lys) is a critical goal in clinical practice. Herein, a novel, label-free and sensitive turn ON–OFF chemiluminescent (CL) probe for Lys was developed based on modulating the biocatalytic ability of the Cu2−xSe nanoparticles. The synthesized Cu2−xSe nanoparticles could significantly enhance the chemiluminescence signal of the luminol–H2O2 system owing to their high copper deficiency, where a very bright blue CL emission was directly observed by the naked eye in darkness and it could last for a long period of up to 36 minutes. However, Lys could induce the aggregation of the Cu2−xSe nanoparticles due to the electrostatic attraction, which could be monitored by SEM and dark-field imaging. The aggregated Cu2−xSe nanoparticles with lower copper deficiency density could suppress their catalytic ability and turn off the chemiluminescence of luminol–H2O2. The established ON–OFF CL strategy exhibited a selective response to protein Lys and showed a quantitative relationship between the changes in the CL signals and the concentration of Lys over a wide range of 0.5–5000 ng mL−1, with a low detection limit of 0.36 ng mL−1. This study provides a promising strategy for detecting biomolecules by exploiting their specific interactions with nanomaterials.
研究领域:
分析化学
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生物医学
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纳米材料科学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Yuting Yan,Fangfang Zhou,Qian Wang,Yue Huang
In this work, a sensitive electrochemical biosensor is developed for the detection of quinolones based on Cu 2+ -modulated signal amplification. In the presence of target quinolones, the formation of quinolones-Cu 2+ complex inhibits the activity of Cu 2+ -specific DNAzyme. As a result, the intact substrate DNA probe of Cu 2+ -specific DNAzyme is reserved to trigger the hybridization chain reaction, forming long dsDNA nanowires on the surface of the electrode and finally generating a significant amplification of electrochemical signal positively correlated with the concentration of target quinolones. Benefiting from the Cu 2+ -modulated signal amplification, a good linear relationship between the electrochemical signal and the logarithm of ciprofloxacin concentration can be obtained in the range from 0.1 ng mL −1 to 200 ng mL −1 , and the limit of detection is low to 0.052 ng mL −1 . With the advantages of simple operation, high sensitivity and specificity, the electrochemical biosensor has been utilized to assay ciprofloxacin in real foodstuff samples, exhibiting satisfactory analytical performance and showing latent practicability in food safety detection.
研究领域:
分析化学
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食品科学
·
生物医学工程
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产品关联
DOI
高影响因子
Polymer-Plastics Technology and Materials
·
2019
·
IF 0
Ying Pan,Hongting Zhao
In this study, flexible polyurethane foam (FPUF) was modified with bio-based coatings composed of polyethylenimine (PEI) and alginate (ALG), fabricated by layer-by-layer (LbL) self-assembly. LbL self-assembled coatings modified FPUFs were studied for their potentials for removing Cu2+ ions from aqueous solutions by using batch adsorption technique, as a function of assembled bilayers number, pH value, carrier amount and adsorption time. The maximum adsorption capacity of the modified FPUF was shown to be 54 mg/g for Cu2+. Results suggested that the LbL self-assembly could potentially be a promising cost-effective technique for fabricating advanced adsorbent materials for removing pollutants from wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
危险品化学品经营许可证（带存储）