SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Zhuoyu Bu,Minhui Hou,Zihao Li,Zhujun Dong,Lusha Zeng,Peng Zhang,Guangyu Wu,Xiang Li,Ying Zhang,Yuwei Pan
Boron was used as an environmentally friendly and efficient reductant to accelerate the recycle of Fe 2+ enhancing peroxymonosulfate (PMS) activation for sulfamethazine (SMT) degradation. The SMT removal was only 28.1% within 30 min in Fe 2+ /PMS system while SMT removal could reach to 98.9% within only 3 min in Boron/Fe 2+ /PMS (B/Fe 2+ /PMS). Electron paramagnetic resonance spectroscopy (EPR) tests, quantitative detection and radical quenching experiments illustrated that OH and SO 4 − played important role and Fe(IV), 1 O 2 and O 2 − also participated in SMT removal. The addition of boron could enhance the role of OH and SO 4 − in SMT removal in Fe 2+ /PMS system. X-ray photoelectron spectroscopy (XPS), electrochemical tests and density functional theory (DFT) calculation were conducted to confirm the mechanism of boron for accelerating the recycle of Fe 2+ . Possible SMT degradation pathway was proposed. B/Fe 2+ /PMS process could efficiently remove SMT at low Fe 2+ dosage and neutral pH. B/Fe 2+ /PMS system also exhibited a superior resistance to inorganic ions and nature organic matters. Moreover, B/Fe 2+ /PMS system had good applicability to different pollutants, excellent reusability for antibiotics removal, and efficient performance for removing antibiotics in nature fresh water. The results compared with others’ works also demonstrated the present study process was a promising strategy for antibiotics removal.
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ACS Applied Nano Materials
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2022
·
IF 6.14
Ze-Wei Ma,Wen-Rong Li,Jing-Yue Zhang,Wen-Xin Yang,Shaozao Tan,Ji-Ye Cai,Sui-Ping Deng
Effective photosensitizers (PSs) are at the heart of the key role of photo-driven antibacterial therapy. However, relative high temperature required for bactericidal activity, stimulating at multiple wavelengths, and multi-step synthesis of the photothermal and photodynamic agents challenge their applications in antibacterial treatment. In this study, silver nanoparticles (AgNPs) functionalized by kaempferol (Kae) are implanted into Prussian blue (PB) to construct photo-responsive nanocubes (AgPB) by a simple synthetic process. The as-synthesized AgPB nanocomposites were found to have an average size of ∼140 nm, and the particle size range of the loaded-AgNPs was 5–15 nm. The structure of AgPB was characterized, and the photothermal and photodynamic evaluation of antibacterial activity of AgPB was investigated under single 808 nm near-infrared (NIR) light. By adjusting the doping ratio of AgNPs, the band gap can be tuned from 2.78 to 2.56 eV to further enhance the photothermal conversion of AgPB and its ability to generate reactive oxygen species (ROS). When compared with AgPB without NIR illumination, in vitro antibacterial studies by usingEscherichia coliandStaphylococcus aureusshowed that AgPB under 808 nm NIR light could rapidly heat up to 50 °C, enhance the formation of ROS, and promote the ion release amount of Fe2+, Fe3+, and Ag+ to increase oxidative stress, leading to inhibition of bacterial proliferation significantly. BothE. coliandS. aureuswere completely killed within 10 min. Moreover, the biofilm formation was remarkably inhibited, and the eradication ratio againstE. coliandS. aureusbiofilms was 69.73 and 60.01%, respectively. In addition, the hemolytic activity test proved that AgPB had good biocompatibility. The results showed that AgPB with triple bactericidal modalities could expand the application of PSs and serve as a promising nanocomposite for antibacterial therapy.
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Journal of Analysis and Testing
·
2022
·Vol. 6
·期 2
·111-119
·
IF 0
Guo Xin,Deng Xin-Chun,Zhang Ya-Qing,Luo Qin,Zhu Xiao-Kang,Song Yang,Song Er-Qun
Rapid and accurate detection of pathogenic bacteria of Staphylococcus aureus ( S. aureus ) is of importance in the field of clinical research and practical application. Herein, we report a magnetic relaxation switching (MRS)-based strategy for detecting S. aureus in complex samples via the assistance of signal amplification system of liposome. In this design, vancomycin (Van) modified 200 nm magnetic beads (MB 200 -Van) and biotinylated immunoglobulin (Biotin-IgG) were employed as capture probes for S. aureus which following labelled by biotinylated liposomes loading with glucose molecule (Biotin-liposome@Glu, BLGs) based on the affinity of biotin with streptavidin. The released glucose molecules combining with glucose oxidase generated Fe 3+ , causing transverse relaxation time ( T 2 ) signal change. The combination of dual recognition of S. aureus , liposome assisted signal amplification, and the MRS-based assay achieved direct and specific detection of S. aureus in blood and abscess samples. The as-proposed method for S. aureus assay in this study shows potential application for infectious diagnosis in clinical.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
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IF 4.3
Yanan Zhao,Xinxin Ji,Jiamin Liang,Yue Gao,Huan Xing,Yuxin Song,Juan Hou,Guang Yang
Herein, fluorescent N-doped carbon dots (N-CDs) were obtained using hydrothermal treatment of polyethyleneimine and melamine . The N-CDs exhibit nanoscale structure, good water solubility, photostability and excellent fluorescence property with a high fluorescence quantum yield of 26 %. The as-prepared N-CDs were selected for the detection of Fe 3+ with a fluorescence “OFF-ON” strategy by the mechanism of internal filtration effect (IFE). A good linear relationship can be observed for the concentration of Fe 3+ from 0 to 500 μM, and the calculated detection limit (LOD) for Fe 3+ was 0.88 μM (3σ/slope). Meanwhile, the N-CDs based sensor can be utilized for tracing Fe 3+ in real water samples. In addition, the quenched fluorescence can be recovered with the treatment of l-cysteine, and thus can be designed for quantitative determination of l-cysteine with a fluorescent “ON-OFF-ON” switch. Moreover, a set of resettable, multireadout logic gate operations including OR and AND have been realized for the N-CDs.
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JOURNAL OF NANOPARTICLE RESEARCH
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2021
·Vol. 23
·期 4
·1-13
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IF 2.253
Liang Caimei,Hu Xiaoxi,Wang Yun,Zhang Yanjun,Fu Guo,Li Chunxing
Carbon quantum dots surface doped with nitrogen (N-CQDs) were synthesized with quantum yield (24.9–66.4%) via an easy hydrothermal route while using citric acid as a precursor for carbon and varying concentrations of DL-Alaninol as the dopant. The as-prepared N-CQDs with adjustable fluorescence emission transformed from weak excitation-dependent to excitation-dependent and then to excitation-independent. After a detailed characterization and investigation, the N-CQDs were found to have a uniform particle size (1.76–3.07 nm) and good monodispersion. They were bearing similar functional groups on their surfaces but with different contents. The N/C ratio of N-CQDs increased gradually with the increasing contents of dopant, while the O/C ratio gradually decreased. The photoluminescence (PL) of (N-CQDs) has been explained by a proposed PL mechanism that involved quantum size effect and the energy levels by the surface state. When further investigated as a fluorescent probe for Fe 3+ ion detection, the synthesized N-CQDs were found to be selectively and sensitively detecting Fe 3+ ions. The N-CQD-based fluorescent probe was capable of detecting in a wider linear detection range and lower limits of detection (LODs). Graphical abstract
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MOLECULES
·
2021
·Vol. 26
·期 8
·2115
·
IF 4.412
Jiayong Huang,Zhenshuo Yan,Peiling Qiu,Yufeng Mo,Qizhen Cao,Qiuhong Li,Lini Huo,Lichun Zhao
A new coumarin-acridone fluorescent probe S was designed and synthesized, and the structure was confirmed with1H/13C NMR spectrometry, single-crystal X-ray diffraction, and high-resolution mass spectrometry. This probe has high sensitivity and selectivity for Fe3+over other testing metal ions at 420 or 436 nm in acetonitrile–MOPS (3-Morpholinopropanesulfonic Acid) buffer solution (20.0 μM, pH = 6.9, 8:2 (v/v)). Under physiological conditions, the probe displayed satisfying time stability with a detection limit of 1.77 µM. In addition, probe S was successfully used to detect intracellular iron changes through a fluorescence-off mode, and the imaging results of cells and zebrafish confirmed their low cytotoxicity and satisfactory cell membrane permeability, as well as their potential biological applications.Keywords:Fe3+detection;bioimaging;coumarin-acridone compound
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PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2021
·
IF 5.268
Wen Luo,Huaxiao Liu,Xuan Liu,Lixiao Liu,Wenbo Zhao
MXene quantum dots have attracted much attention due to their great optical performance and excellent water solubility. Glutathione (GSH) plays a key role in living cells. In this study, a biocompatibility nanoprobe was prepared for detecting intracellular GSH based on MXene N-Ti 3 C 2 quantum dots (N-Ti 3 C 2 QDs). The N-Ti 3 C 2 QDs act as the fluorescence reporters and the ferric iron (Fe 3+ ) as the quenchers based on nonradiative electron-hole annihilation. When Fe 3+ encounters the amino group of N-Ti 3 C 2 QDs, the electrons of N-Ti 3 C 2 QDs in the excited state will transfer to the half-filled 3d orbitals of Fe 3+ , leading to the fluorescence quenching of N-Ti 3 C 2 QDs. When the N-Ti 3 C 2 QDs/Fe 3+ nanoprobe acts on the cancer cell MCF-7, the abundant GSH in the cancer cells can reduce Fe 3+ to Fe 2+ , which will restore the fluorescence of N-Ti 3 C 2 QDs. The N-Ti 3 C 2 QDs/Fe 3+ nanoprobe displays a high sensitivity for GSH with a detection limit of 0.17 μM in range of 0.5−100 μM. It becomes a promising probe for detecting and showing cellular imaging of GSH in MCF-7 cells. The N-Ti 3 C 2 QDs/Fe 3+ nanoprobe might provide a new way for imaging-guided precision cancer diagnosis.
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高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Qingxiao An,Qinlu Lin,Xiaohui Huang,Rongju Zhou,Xin Guo,Weizhen Xu,Suyan Wang,Dong Xu,Huan-Tsung Chang
Preparation of carbon dots (C dots) with strong emission at long wavelengths is an ongoing goal to their advanced applications, especially in bioanalysis. For sensing Fe 3+ and ascorbic acid (AA), we prepared C dots with a large Stokes shift using o- phenylenediamine (OPD) as the carbon source through an electrochemical method . During the electrolysis, OPD undergoes polymerization, carbonization , and passivation at the platinum anode to form C dots. These C dots were characterized by UV–Vis spectroscopy, transmission electron microscopy , Raman spectroscopy , X-ray photoelectron spectroscopy (XPS), and FT-IR spectroscopy. They are composed of C, N, O, H elements, having a maximum of emission at 570 nm and a supreme excitation at 261 nm, with a Stokes shift of 309 nm. A new emission at 350 nm emerged with their exposure to Fe 3+ and the intensity rises upon increasing Fe 3+ , while the emission intensity at 570 nm decreases. Thus, dissimilar to the usual quenching strategy, a novel ratiometric fluorescent sensor based on the fluorescence intensity ratio (F 350 /F 570 ) of the C dots at 350 nm and 570 nm has been developed for quantitation of Fe 3+ with a limit of detection (LOD) of 0.16 μM and high selectivity toward Fe 3+ against K + , Cu 2+ , and Fe 2+ . With evidence of decreased C–N C and C–O/N–O in XPS and increased content of C O/N O and N–H, we suggested the complexation of Fe 3+ with the surface groups led to the changes in chemical bonds accounting for their optical property variation. Furthermore, AA can quench the fluorescence of C dots at 570 nm and Fe 3+ -treated C dots (incubated with 50 μM Fe 3+ ) at 350 nm by a static mechanism. Accordingly, two assays toward AA were developed with LODs of 0.12 μM and 0.32 μM by using C dots and Fe 3+ -treated C dots, respectively. Especially, both AA assays exhibited excellent selectivity under various substances including those with strong reducing ability such as pyrogallic acid, sodium citrate, tea polyphenol, and dithiothreitol. The applications of the assays were validated with the quantitation of Fe 3+ in urine and AA in beverages. Electrochemical method is a significant approach to develop novel C dots even using the same carbon sources as in other methods.
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高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Xiaoshuo Zhang,Chunhua Li,Sheliang Zhao,Huiyun Pang,Yong Han,Xueli Luo,Wenzhi Tang,Zhonghong Li
Novel S-doped silicon quantum dots (S-SiQDs) were prepared by l -cysteine doped silicon quantum dots (SiQDs) for fluorescent detecting Fe 3+ in water. The as-prepared S-SiQDs sensor with an average diameter of 4.77 nm possessed richness of –NH 2 , endowing good water solubility and strong blue fluorescence. The quantum yield (QY) of ~66% was abtained when S-SiQDs exited at 345 nm. The synergistic effect of electron transfer that the electron of –NH 2 on S-SiQDs surface transfer to 3d unoccupied obrials of Fe 3+ , inner filter effectaccounted for fluorescence quenching. The probe possessed a relative wide liner range from 1 μmol/L to 20 μmol/L with the limit of detection (LOD) of 0.21 μmol/L to detecte Fe 3+ . The as-prepared S-SiQDs sensor could sensitively and selectively detect Fe 3+ in real water samples with satisfied recoveries of 90%–106%, which presented its potential applicability in the environmental fields.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
·
IF 3.99
Ning Wu,Hao Guo,Xiaoqiong Wang,Lei Sun,Tingting Zhang,Liping Peng,Wu Yang
This paper studies the application of lanthanide metal-organic frameworks (Ln-MOFs) in fluorescence detection . The europium-based metal-organic frameworks (Eu-MOFs) are synthesized by a facile solvothermal method , and then the as-prepared MOF were further characterized by PXRD , FT-IR, TG, EDS, SEM, UV–vis spectra and fluorescence spectroscopy. The results demonstrate that Eu-MOF exhibits an intense red fluorescence, which can be readily observed by naked eye in solid state, good structural stability and fluorescence stability in aqueous solution or other organic solvents , especially high selectivity and sensitivity to Fe 3+ and benzaldehyde and the visible color change by the naked eye under UV-light. This luminescent MOF can be used to detect Fe 3+ and benzaldehyde in an aqueous environment with low detection limits of 0.027 μM for Fe 3+ and 0.011 μM for benzaldehyde.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2020
·
IF 5.774
Dapeng Liu,Yongliang Chen,Toan Trong Tran,Ganwei Zhang
Non-polyamide (non-PA) thin-film composite nanofiltration (TFC-NF) membranes have received tremendous attention in recent years, but their development is strongly hindered by the complicated fabrication process and the trade-off between permeability and selectivity. Here, we report a highly perm-selective non-PA TFC-NF membrane through 2-minute rapid assembly of tannic acid (TA) on hydrolyzed polyacrylonitrile (PAN) substrate via Fe 3+ intermediated regulation and coordination. The optimized membrane with a molecular weight cut off of ~390 Da showed high rejections for salts in a sequence of Na 2 SO 4 (90.2%) > MgSO 4 (83.4%) > NaCl (50.0%) > MgCl 2 (35.2%) and desirable rejections for organic pollutants (e.g. >99.0% dyes, 92.2% streptomycin and 81.8% chloramphenicol) while maintaining a pure water permeability of as high as 13.6 L·m −2 ·h −1 ·bar −1 , which clearly outperforms the reported non-PA membranes. In addition, the assembled TFC membrane showed excellent antifouling performance and reasonable structural stability against operation pressure and solution alkalinity. These results are highly promising and indicate a great potential for the membrane to be used in practical nanofiltration application, e.g. water purification and wastewater reclamation. Our work outlines the production of novel high-performance non-PA membrane with a fast fabrication process in a green chemistry context.
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JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Bo Chen,Yangrui Cao,Huinan Zhao,Fengxia Long,Xiang Feng,Juan Li,Xuejun Pan
Herein, a novel Fe 3+ -stabilized magnetic polydopamine composite (Fe 3 O 4 /PDA-Fe 3+ ) was facilely constructed, systematically characterized, and subsequently applied for the first time as a versatile adsorbent for treatment of Methylene blue (MB) in complex wastewater. Results showed that as-prepared material had prominent adsorption ability toward MB in its single dye solution over a wide pH range (3–10) with q max value of 608.8 mg/g at 318 K. More interestingly, MB could be selectively captured by resulting adsorbent from mixed dye solutions (MB-cationic dye and MB-anionic dye) and complex aqueous solution with high ionic strength up to 0.5 mol/L NaCl. It was eventually revealed that the enhanced and selective adsorption of MB by as-resultant adsorbent was due to the synergistic effects between multiple uptake mechanisms. What's more, its adsorption efficiency toward MB in simulated wastewater still maintained higher than 80 % of its original uptake performance after several runs of adsorption-desorption. Additionally, it exhibited more superior uptake performance toward MB than commercial powder activated carbon (PAC) in column adsorption system. Thus, the outstanding sorption ability, unique capture selectivity, as well as excellent stability and recyclability for model wastewater endow it a promising candidate adsorbent for selective adsorption and separation of MB from complex wastewater.
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高影响因子
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