Nanoscale
·
2018
·Vol. 10
·期 34
·15932-15937
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IF 7.233
Feng Wang,Jian Lin,Hongye Wang,Shansheng Yu,Xiaoqiang Cui,Asghar Ali,Tao Wu,Yang Liu
Herein, the ECL behaviors of precise mono-Cu+ ion doped Cd–In–S supertetrahedral chalcogenide nanoclusters (Cu@CdInS NCs) were investigated, and the effect of mono-Cu+ ions at the vacancy site of NCs on ECL emission performance was also elucidated. Precise mono-Cu+ ion doping not only induced new ECL emission at 596 nm with enhanced efficiency as high as 21.72% relative to [Ru(bpy)3]2+, but also improved acid tolerance of the ECL performances of NCs. In addition, a simple, fast and label-free dopamine ECL sensor with excellent selectivity was achieved.
研究领域:
分析化学
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纳米技术
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电化学
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 26
·39638-39648
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IF 5.19
Liu Suo,Wu Dingsheng,Hu Jinyan,Zhao Lingling,Zhao Lei,Yang Maohuan,Feng Quan
It is necessary to effectively separate photocatalytic materials from water bodies and reuse catalysts for industrial wastewater treatment. Herein, a novel nanofiber membrane with enhanced light absorption and reusability of photocatalytic materials was prepared. The three-dimensional porous structure of the nanofibers helps the photocatalyst efficiently degrade pollutants. Specifically, a high-efficiency photocatalyst carrier with a nanofiber structure (PAN/PU/β-CD@Ag nanofiber membrane) was prepared by electrospinning and a simple silver plating process, and then ZnO NPs were synthesized in situ on the nanofiber membrane during the hydrothermal process. Under visible-light irradiation, the ZnO-loaded PAN/PU/β-CD@Ag nanofiber membranes exhibited excellent photocatalytic performance for the degradation of methylene blue (MB, 71.5%) and tetracycline hydrochloride (TCH, 70.5%). Additionally, a possible pathway of charge migration in this system was proposed. This design may provide a new idea for the preparation of visible-light photocatalytic nanofiber membranes and their treatments of wastewater containing dyes and hormones.
研究领域:
材料科学
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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
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Liubing Kong,Ying Gan,Tao Liang,Longjie Zhong,Yuxiang Pan,Dmitry Kirsanov,Andrey Legin,Hao Wan,Ping Wang
As a powerful tool for medical diagnosis and bioanalysis , conventional optical spectrometers are generally expensive, bulky and always require an accompanying data processing device. In this work, we developed a novel smartphone-based CD-spectrometer (SCDS) for high sensitive and ultra-portable colorimetric analysis , with the advantage of cost-effective and simplicity. The distance between the light source and slit, the structure of SCDS and the parameters of camera in the smartphone were all optimized to ensure the best analytical performance. Besides, the SCDS employed HSV color model and utilized the overall intensity calculated by summing V-value of adjacent position for the absorbance measurement. In this way the errors caused by the low resolution of CD-grating can effectively be eliminated to promote the sensitivity of the SCDS. The performance of the SCDS was first validated for colorimetric detection of BSA with a detection limit of 0.0073 mg/mL, which is superior compared to that of the microtiter plate reader (MTPR). Moreover, by combining with 3,3′,5,5′-tetramethylbenzidine-manganese dioxide (TMB-MnO 2 ) nanosheets reaction, a high sensitive and specific system for ascorbic acid detection was established. The SCDS gives a detection range from 0.6250 μM to 40 μM with a detection limit of 0.4946 μM for AA detection. Compared to other studies, the SCDS features wide detection range and very low detection limit with low cost instrument. Therefore, the SCDS will be an ideal and promising colorimetric system for point-of-care (POC) application in food security, disease diagnosis and environmental monitoring.
研究领域:
医学诊断
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生物分析
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分析化学
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即时检测
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环境监测
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食品安全
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产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2022
·
IF 13.4
Mengmeng Wu,Erping Bi,Binghua Li
Soil colloids can affect the cotransport of nanoparticles and pollutants. In this study, the influencing mechanisms of organic fulvic acid (FA) and inorganic montmorillonite colloid (MONT) on the cotransport of nHAP and Cd(II) were investigated. Column experiments combined with Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, attachment efficiency calculation and two-site kinetic retention model were applied to study the mechanisms. Results showed that the co-existence of FA or MONT made the transport of nHAP improved by 58–75% and 33–59%, respectively. Both of them could improve the stability of nHAP particles and enhance electrostatic repulsion between nHAP particles and sand. Retention of nHAP in the sand was mainly caused by secondary energy minimum and physical straining. The co-existence of FA or MONT changed the amount of adsorbed species of Cd(II) and decreased the retardation effect of nHAP on Cd(II) transport. With increasing FA concentration, soluble FA·Cd and suspended nHAP·FA·Cd complexes in the system increased. Transport of soluble Cd(II) and total Cd(II) were strengthened due to the concentration effect of FA and the improved stability of nHAP particles. With increasing MONT concentration, the amount of soluble Cd(II) decreased, but that of colloidal Cd(II) (nHAP·Cd and MONT·Cd) increased. Due to the stronger effect of colloidal Cd(II) change than that of the soluble Cd(II) change, the transport of total Cd(II) was improved by 34–57%. The findings of this study can help to understand the fate of nanoparticles and Cd(II) in natural water and soil.
研究领域:
环境科学
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土壤化学
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胶体科学
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水质
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DOI
PubMed
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2018
·Vol. 215
·期 11
·1700905
·
IF 1.795
Shuping Deng,Decong Li,Liping Zheng,Yu Tang,Zhong Chen,Luqi Sun,Wenting Liu,Lanxian Shen,Shukang Deng
In this work, the effect of Cd and Sn atoms partly substitution for Zn on among crystal growth, thermal stability, mechanical, and electrical transport property in β-Zn 4 Sb 3 is reported. In a series of samples prepared from the atomic ratios of Zn:Sb:Cd:Sn = 4.4:3: x :3 ( x = 0.2, 0.4, 0.6, and 0.8). Carrier concentration of all samples varies from 4.52 × 10 19 to 6.42 × 10 19 cm −3 as carrier mobility changes from 58.27 to 67.93 cm 2 V −1 s −1 at room temperature. As a result, electrical transport properties of the samples are optimized by Cd Sn co-doped. The experimental density of all the samples varies from 6.26 × 10 3 to 6.34 × 10 3 kg m −3 consistent with the theoretical value. The weight loss and melting point of the sample are determined to discuss thermal stability in the heating process in air, indicating that the single crystals β-Zn 4 Sb 3 possess an excellent thermal stability and it is practical importance in the TE application at high temperature. Consequently, the maximal power factor of 1.70 × 10 −3 W m −1 K −2 is achieved at 540 K for the sample with initial Cd content x = 0.2, which is enhanced by 40% compared with the single-doping system in β-Zn 4 Sb 3 .
研究领域:
材料科学
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热电材料
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固体物理
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无机化学
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功能材料
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2023
·
IF 5.2
Shanshan He,Shengle Kang,Lan Zhang,Xiang Dong,Yan Zhao,Fangfang Li,Qihong Cen
Sodalite is a common zeolite , which is often discarded or ignored due to its small pore size and poor adsorption capacity. In this study, two sodalite type materials , CSF-S and N-CSF-S, were synthesized using cellulose superfine fiber (CSF) as template. Its unique scaly structure not only enhances its adsorption capacity for Cd (II), but also improves its adsorption efficiency. At 298 K and the initial Cd (II) concentration of 100 mg/L, the adsorption equilibrium of CSF-S was achieved within 30 min, which is 98% shorter than that of traditional sodalite. The adsorption of Cd (II) by CSF-S and N-CSF-S is an endothermic process and at 298 K the adsorption capacity could be as high as 260.1 and 284.1 mg/L, respectively, which were 1.9 and 2.0 times of the original sodalite, far higher than the reported similar adsorbents, and competitive to over other types of adsorbents. In addition, with low zero points of charge CSF-S (pH zpc around 1) and N-CSF-S (pH zpc around 3) can effectively remove Cd(II) over a wide pH range, superior to most zeolitic sorbent materials. Therefore, this work proposes a simple and cost-effective synthesis method for the sodalite type sorbents with high Cd(II) adsorption capacity and rapid adsorption rate, and also provides some basis for the study of heavy metal adsorption materials in aqueous systems.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Mingtao Tan,Hong Jiang,Rusong Chai,Miao Fan,Zengting Niu,Guotong Sun,Shanchun Yan,Dun Jiang
Heavy metal pollutants are important abiotic environmental factors affecting pest habitats. In this study, Cd pre-exposure significantly increased the tolerance of Lymantria dispar larvae to β-cypermethrin, but did not significantly alter their tolerance to λ-cyhalothrin and bifenthrin. The activation of P450 by Cd exposure is the key mechanism that induces insecticide cross-tolerance in L. dispar larvae. Both before and after β-cypermethrin treatment, Cd exposure significantly increased the expression of CYP6AB224 and CYP6AB226 in L. dispar larvae. Silencing CYP6AB224 and CYP6AB226 reduced the tolerance of Cd-treated L. dispar larvae to β-cypermethrin. Transgenic CYP6AB224 and CYP6AB226 genes significantly increased the tolerance of Drosophila and Sf 9 cells to β-cypermethrin, and the recombinant proteins of both genes could significantly metabolise β-cypermethrin. Cd exposure significantly increased the expression of CnCC and Maf . CnCC was found to be a key transcription factor regulating CYP6AB224 - and CYP6AB226 -activated insecticide cross-tolerance in Cd-treated larvae. Decreasing reactive oxygen species (ROS) levels in the Cd-treated larvae or increasing ROS levels in the untreated larvae reduced or enhanced the expression of CnCC , CYP6AB224 and CYP6AB226 and β-cypermethrin tolerance in L. dispar larvae, respectively. Collectively, Cd exposure confers β-cypermethrin tolerance in L. dispar larvae through the ROS/ CnCC signalling pathway-mediated P450 detoxification. Environmental Implication Heavy metals have been reported to produce cross-tolerance in agricultural insects to insecticides. The growing demand for chemical pest control necessitates expanding research on the widespread occurrence of cross-tolerance to insecticides among pests, particularly forest pests, in areas polluted with heavy metals. In this study, Cd pre-exposure enhanced the cross-tolerance of Lymantria dispar larvae to β-cypermethrin. Cd pre-exposure activated the P450 detoxification system of L. dispar larvae. CYP6AB224 and CYP6AB226 were key detoxify genes to the formation of cross-tolerance. ROS-CnCC signaling pathway was proved to be responsible for activation of detoxify genes.
研究领域:
环境科学
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昆虫学
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分子生物学
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毒理学
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DOI
PubMed
高影响因子
Molecular Medicine Reports
·
2017
·Vol. 16
·期 2
·1383-1388
·
IF 1.692
Tao Liu,Xidong Wu,Yigang Wang,Xiongjun Hou,Gang Jiang,Ting Wu,Huifen Xie,Minqiang Xie
The co-delivery of a drug and a target gene has become a primary strategy in cancer therapy. Based on our previous study, a synthesized star‑shaped co‑polymer consisting of β‑cyclodextrin (CD) and a poly(L‑lysine) dendron (PLLD) was used to co-deliver docetaxel (DOC) and matrix metalloproteinase 9 (MMP‑9) small interfering RNA, via CD‑PLLD/DOC/MMP‑9 complexes, into mice implanted with HNE‑1 human nasopharyngeal carcinoma (NPC) tumor cells in vivo. Unlike the commonly used amphiphilic co‑polymer micelles, the obtained CD derivative may be used directly for a combined delivery of nucleic acid and hydrophobic DOC without a complicated micellization process. In vivo assays demonstrated that CD‑PLLD/DOC/MMP‑9 inhibited HNE‑1 tumor growth and decreased proliferating cell nuclear antigen expression levels, indicating a potential strategy for NPC therapy. In addition, the distribution of DOC and MMP‑9 was investigated; CD‑PLLD/DOC/MMP‑9 complexes were phagocytized in reticuloendothelial systems, including the liver and spleen, which requires further study. Furthermore, the complexes did not cross the blood‑brain barrier due to their large molecular size, suggesting they may be relatively safe. Additionally, the complexes mediated increased DOC concentrations with prolonged blood circulation and EGFP expression in HNE‑1 tumors. These results suggest the future potential application of CD-PLLD/DOC/MMP-9 for NPC therapy.
研究领域:
肿瘤学
·
药学
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分子生物学
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癌症治疗
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Mengmeng Wu,Limei Mo,Erping Bi
Natural colloids can influence the binding mechanisms between nano-hydroxyapatite (nHAP) and Cd(II). In this study, the effects of organic and inorganic natural colloids on Cd(II) sorption onto nHAP were compared. Different experimental approaches combined with the additivity model and the Extended-Derjaguin-Landau-Verwey–Overbeek model were used to quantify the distribution of Cd(II) in the systems of nHAP and natural colloid, and the interaction energy between particles. The results showed that both fulvic acid (FA) and montmorillonite colloid (MONT) had the promotion and inhibition effects on Cd(II) sorption onto nHAP. Coexistence of FA or MONT could stabilize nHAP particles. FA could adsorb onto nHAP particle surface via carboxylic and phenolic groups, which increased nHAP electronegativity and formed steric resistance effect. Coexistence of MONT mainly increased nHAP electronegativity. These effects prevented the reduction of the specific surface area of nHAP particles and increased the Cd(II) sorption onto nHAP. However, the inhibition effect on Cd(II) sorption was enhanced with increasing concentration of FA or MONT because more soluble FA-Cd or suspended MONT-Cd complexes formed in the system. In nHAP-FA-Cd systems, the Cd(II) sorption onto FA was well predicted but that onto solid phase was underestimated by the additivity model. In nHAP-MONT-Cd systems, Cd(II) sorbed onto mixtures of nHAP and MONT was well described by the additive model. The findings of this study can help to understand the fate of Cd(II) in natural water and soil.
研究领域:
环境化学
·
胶体科学
·
水土科学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2022
·
IF 6.556
Xuemei Ma,Jiayi Yu,Lin Wei,Qian Zhao,Liyong Ren,Zhiyong Hu
Simultaneous selective determination of Fe (Ⅱ) and Fe (Ⅲ) is of great significance to the study of iron ion tracking and release of iron supplement in gastric fluid. In this paper, a composite material (N-CQDs/AgNPs/β-CD) was prepared by a one-pot method. The various characterizations confirmed the silver nanoparticles (AgNPs) grew in situ on the surface of nitrogen-doped carbon quantum dots (N-CQDs), and the β-cyclodextrin (β-CD) and AgNPs linked together by Ag–O bonds finally presented gourd-like nanoparticles on the surface of N-CQDs. Then, N-CQDs/AgNPs/β-CD modified glassy carbon electrode (GCE) was applied to detect Fe(II) and Fe(III) simultaneously. The cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results confirmed that N-CQDs/AgNPs/β-CD enhanced electrode performances because of the synergistic effect between N-CQDs, AgNPs and β-CD. The sensor was successfully applied for the determination by differential pulse voltammetry (DPV) of Fe(II) and Fe(III) released from four iron supplementations in simulated gastric fluid (SGF).
研究领域:
分析化学
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生物医学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Xubing Sun,Jianfa Zhu,Qiuyue Gu,Yaohui You
To introduce carboxyl groups on the surface of chitin and improve the adsorption performance of Cd(II) from aqueous solution, chitin was modified by 2, 2, 6, 6-tetramethylpiperidine-1-oxyl radical (TEMPO) with hypochlorite (NaClO) and sodium bromide (NaBr). Structure characterization demonstrated the carboxyl groups were successfully introduced on the surface of chitin. Batch experiments with various parameters of the content of carboxyl group, pH, contact time, initial concentration of Cd(II) and ionic strength on the adsorption performance were investigated. The surface-modified chitin exhibited enhancement for the Cd(II) adsorption capacity than original chitin. The Cd(II) adsorbed on carboxylated chitin increased rapidly in the first 30 min and reached equilibrium within 120 min. The dynamic data followed the pseudo-second-order kinetic model . Both Frendlich and Langmuir isotherm models fitted well to the equilibrium data and the maximum adsorption capacity calculated from Langmuir model was about 207.9 mg/g at 298 K. The adsorption of Cd(II) tended to increase with an increase of pH varying from 2.0 to 5.0, but decrease with an increase of ionic strength. The Cd(II) removal mechanism on carboxylated chitin was mainly through electrostatic interaction to form outer-sphere complexes and ion exchange.
研究领域:
环境化学
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材料科学
·
水处理
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Zexuan Sui,Yan Sun,Yue Jing,Ci Wang,Yao Zhu,Sen Qian,Jing Ren,Jianzhong Zhang
We report the first study on in-situ co-growth of biphasic CsPbBr 3 and Zn-Cd-S quantum dots (QDs) in borosilicate glass , and provide explicitly evidence of their morphology and nanoscale distribution. Such biphasic QDs co-doped nano-glass composites show unique green and red dual-band emissions. By changing the thermal heating scheme, the fluorescence intensity ratio (FIR) and thus the apparent color can be widely adjusted. The FIR can be also fine-tuned simply by varying the excitation wavelength. Based on the FIR, a self-calibrated X-rays dosimeter is constructed, which also possesses a good thermal stability. Although the X-rays induced scintillation weakening occurs, it can be readily recovered by post-thermal-annealing.
研究领域:
材料科学
·
纳米技术
·
光学
·
辐射检测
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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）