Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Yongchuan Wu,Jitao Chen,Zhongmin Liu,Ping Na,Zhibin Zhang
Removing trace radioactive 137 Cs from aquatic system is still a challenge. Herein, Zirconium Titanium Phosphate (ZTP) was prepared and utilized for Cs removal from seawater. The structure and morphology of ZTP were systematically characterized. ZTP exhibited typical feature of tetravalent metal acid, and the surface was pocked with abundant hydroxyl groups which can reacted with H 2 O to form exchangeable protons. Bench-scale to pilot-scale adsorption was carried out to assess Cs removal capacity and rate. ZTP showed a good adsorption performance for Cs + especially at trace concentration (500 ppb) and the removal rate in deionized water and seawater were 98.8 % and 83.9 %, respectively. Radioactive experiments were conducted to test the selective removal of 137 Cs + and the removal rates reached 98.3 %. Slurry-bed adsorption device was designed and used as the pilot-scale equipment. The removal rate was as high as 92.7 % after 12 cycles, indicated that ZTP is one of the promising adsorbents in industrial application. Pyridine adsorption IR spectra indicated that surface of ZTP was riddled with Brønsted and Lewis acid sites, and the protons at the Brønsted acid site exchanged with Cs + . This work will provide reference for the treatment of large-scale Cs-contaminated wastewater.
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ChemElectroChem
·
2022
·Vol. 9
·期 10
·e202200237
·
IF 4.782
Xiaoxiao Chen,Pu Li,Chen Luo,Chaobiao Huang
Graphical Detection mechanism of PEC sensor for detecting xanthine based on photocurrent signal changes caused by hydrogen peroxide reduction catalyzed by copper nanoclusters A photoelectrochemical (PEC) sensor combining chitosan-coated and glutathione-protected copper nanocluster (CS−GSH−CuNCs) with peroxidase-like activity and xanthine oxidase (XAO) was developed for rapid detection of xanthine. Firstly, CS−GSH−CuNCs was prepared by glutathione (GSH) reduction using chitosan (CS) as protective agent, and then was modified on titanium dioxide nanoparticles (TiO 2 NPs)/ITO electrode which was prepared by sintering titanium dioxide (TiO 2 ) on the ITO electrode surface by high temperature calcination. After excited by light at 350 nm, the photoinduced electrons from the lowest unoccupied molecular orbital (LUMO) of CS−GSH−CuNCs were transferred to the conduction band of TiO 2 , which resulted in spatial separation of electron-hole and enhancement of photocurrent signal. XAO oxidizes xanthine to produce hydrogen peroxide (H 2 O 2 ). Part of the photoinduced electrons from CS−GSH−CuNCs transferred and catalyzed the reduction of H 2 O 2 , resulting in the reduction of the photocurrent. Under optimal conditions, the PEC sensor exhibits good sensitivity and reproducibility with the limit of detection (LOD) of 6.6 nmol ⋅ L −1 and a relative standard deviation of 3.5 % for 10 replicate detections of 1.00 μmol ⋅ L −1 xanthine and the linear range of 0.04–90.0 μmol ⋅ L −1 for xanthine. Furthermore, the PEC sensor presents nice selectivity owing to its enzyme-like activity and was successfully applied to human urine, indicating its great potential for real sample analysis.
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Polymers
·
2023
·Vol. 15
·期 20
·4144
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IF 5
Yisu Wang,Yan Wang,Shuai Qiu,Chongyang Wang,Hong Zhang,Jing Guo,Shengfa Wang,Huixia Ma
Chitosan/Hydroxyapatite composites, enriched with relatively active -NH2and -OH groups, have emerged as promising adsorbents for heavy metal removal. In this study, we harnessed the potential of CS/HAP composites by developing monolithic PLA@CS/HAP filters utilizing 3D printing and freeze-drying techniques. These filters possess both macroscopic and microscopic porous structures, endowing them with exceptional capabilities for removing heavy metals from water. The adsorption properties of CS/HAP composites were explored by varying the dosage, duration, and initial concentrations of copper ions. The maximum adsorption capacity for Cu2+was determined to be approximately 119+/−1 mg/g at the natural pH and 298 K. Notably, the monolithic PLA@CS/HAP filters demonstrated remarkable efficiency in the removal of copper ions, with 90% of copper ions effectively removed within a mere 2-h period in a cyclic adsorption experiment. Furthermore, the PLA@CS/HAP filters exhibited a robust dynamic Cu2+removal capacity (80.8% or even better in less than 35 min) in a dynamic adsorption experiment. Importantly, all materials employed in this study were environmentally friendly. In summary, the PLA@CS/HAP filter offers advantages such as ease of preparation, eco-friendliness, versatility, and broad applicability in diverse wastewater treatment scenarios, thereby presenting a significant potential for practical implementation.Keywords:chitosan;hydroxyapatite;3D printing;adsorption
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 15
·6895-6903
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IF 3.591
Mingqian Wang,Haomiao Zhu,Jian Shen
Designing antibacterial nanomaterials with outstanding antibacterial effects has great practical significance. In this work, we developed a facile therapy tool that used CuS nanoparticles to modify graphite oxide (GO) sheets to form CuS@GO nanocomposites (NCs). At the same time, molecular dynamics simulation proved that compared with pure GO, the addition of PEG can effectively disperse GO and facilitate the enrichment of CuS on the GO surface. Then, a CuS@GO–CS hydrogel was prepared by electrostatic interaction between the CuS@GO NCs and CS hydrogel and the inherent antibacterial properties of the CS hydrogel were investigated. Meanwhile, the CuS@GO–CS hydrogel showed enhanced photothermal antibacterial properties to effectively prevent the bacteria. In vitro experiments indicated that a CS hydrogel has a certain antibacterial effect on Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). Moreover, the CuS@GO NCs have excellent photothermal properties, and the CuS@GO NCs loaded into CS hydrogel significantly enhanced the antibacterial efficacy for S. aureus and E. coli under near-infrared (NIR) laser irradiation. Taken together, the antibacterial CuS@GO–CS hydrogel with good antibacterial properties offers significant promise as an antibacterial nanomaterial for enhanced photothermal antibacterial therapy.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2018
·Vol. 316
·期 1
·209-219
·
IF 1.181
Chang Shuquan,Chang Ling,Han Wei,Li Zheng,Dai Yaodong,Zhang Haiqian
Novel Prussian blue/natural porous framework nanocomposites (PB@Apple, PB@Corn stalk and PB@Pomelo peel) were successfully produced in aqueous solution via an in situ γ radiation method. They have layered porous structure with 70–100 nm irregular PB, regular polygonous porous structure with 50–70 nm cubic PB and hierarchical porous structure with 10–20 nm spherical PB, respectively. They exhibit good Cs + adsorption properties and have maximal Cs + adsorption capacities of 67.3, 62.1 and 83.8 mg g −1 , which can be used to treat radioactive wastewater. This production method is simple, efficient and environmental-friendly.
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Nano Research
·
2024
·
IF 9.5
Yang Xingru,Sheng Yuhang,Zhang Linglong,Yang Lun,Xing Fangjian,Di Yunsong,Liu Cihui,Hu Fengrui,Yang Xifeng,Yang Guofeng,Liu Yushen,Gan Zhixing
Luminescent materials with multi-emission features are difficult to be replicated, which are highly desirable for advanced anti-counterfeiting. Here, we report the pioneering synthesis of Mn 2+ /Yb 3+ /Er 3+ tri-doped Cs 2 Ag 0.8 Na 0.2 InCl 6 double perovskites (MYE-DP), which exhibit photoluminescence (PL) covering from visible to near-infrared (NIR). The PL colors under excitations of 254 and 365 nm are notably different due to the changed relative emission intensities of self-trapped excitons (STEs) and Mn 2+ d–d transition. Moreover, under the excitation of a NIR laser, the MYE-DP exhibits upconversion (UC) emissions of Mn 2+ and Er 3+ . After ceasing the excitation, the long-lived trapped electrons can be thermally released to Mn 2+ and Er 3+ ions, resulting in both visible and NIR afterglow. Based on multi-modal emissions of the MYE-DP, we demonstrate a five-level anti-counterfeiting strategy, which significantly increases the anti-counterfeiting security. In addition, this work provides valuable insights into the energy transfer between STEs, Mn 2+ , Ln 3+ , and traps, laying a solid foundation for future development of new lead-free perovskites.
研究领域:
材料科学
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光学
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化学
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物理学
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Nanoscale
·
2025
·
IF 5.1
Han Li,Shanshan Yu,Handong Jin,Zikun Jin,Wei Qian,Wanshun Yang,Shihe Yang
Direct conversion X-ray detectors based on metal halide perovskites (MHPs), notably CsPbBr₃, promise high performance but suffer from detrimental dark currents and ion migration. Engineering stable and effective electrode interfaces remains a critical bottleneck. This work introduces a quantum dot (QD)-assisted hot-pressing strategy enabling precise control over the interfacial electric field (IEF) through tailored CsPbBr₃/Cs₄PbBr₆ heterojunctions. Synergistic QDs precursor defect engineering and controlled QD nanocrystals secondary growth during hot-pressing facilitate the formation of heterostructures with tunable phase composition at the interface. Optimized devices feature a thick (101 µm), large-grained (26 µm) orthorhombic CsPbBr₃ absorber integrated with an underlying hexagonal Cs₄PbBr₆ layer. Kelvin probe force microscopy (KPFM) directly verifies a built-in potential step (~21 mV) at the interface, establishing an IEF that cooperates with the Type-II band alignment to effectively suppress dark current injection, restrict ion migration, and promote efficient charge separation. Consequently, the engineered detectors demonstrate an outstandingly low dark current density (0.1 nA cm⁻² at 1 V/mm). The device exhibits dramatically improved carrier transport with an 8-fold enhancement in carrier lifetime (from 1.6 s to 12 s), and clinches a high X-ray sensitivity of 12910 μC Gyair⁻¹ cm⁻² (at 85 V/mm), yet still maintaining the ultra-low dark current baseline. When integrated with a 256 × 256 pixel TFT board, a large area X-ray imaging detector was created, which delivered high resolution and high contrast images for various fine industrial products.
研究领域:
材料科学
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半导体物理
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辐射探测
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纳米结构与器件
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光电功能材料
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医学成像
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工业无损检测
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Nana Tang,Shuting Shi,Chuanqin Zhou,Jianhua Ding,Aiting Chen,Quanguo He,Wu Wang
The misuse of the antibiotic ampicillin (AMP) has led to the presence of antibiotic residues in related products, which enter the human body through the ecological or food chain to produce a variety of toxic side effects. There is an urgent need to develop enzyme-based assays with higher specificity to determine antibiotic residues in food. Hereby, bismuth tungstate (Bi 2 WO 6 ) was synthesized using a simple hydrothermal and calcination process. Carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) were mixed with Bi 2 WO 6 by ultrasonication to form composite as modifier on glassy carbon electrode (GCE) surface. Meanwhile, metal β-lactamases (MBLs) were mixed with chitosan to be immobilized on it to obtain the MBLs/CS/Bi 2 WO 6 /MWCNTs-COOH/GCE. Under the optimal conditions, differential pulse voltammetry (DPV) was used for the quantitative detection of AMP. The experimental results showed that the peak currents were linearly correlated with the concentrations of AMP (0.0007–0.05 μM) and (0.1–10 µM) (R 2 = 0.9965 and 0.9956), and the detection limit was 0.17 nM (S/N = 3). The method has good repeatability, reproducibility, stability and immunity to interference, and can be applied to the highly sensitive detection of AMP in real samples with recoveries of 92.4–96.8 % and 94.3–103.0 %.
研究领域:
生物传感
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电化学分析
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食品检测
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高影响因子
International Journal of Nanomedicine
·
2024
·
IF 6.6
Jianmei Lu,Yongzhu Zeng,Huashuai Zhong,Wei Guo,Yuyan Zhang,Wanting Mai,Yucui Qin,Xiaodan Su,Bo Zhang,Weisen Wu,Yu Zhu,Qiujie Huang,Yong Ye
Background and Purpose Nitidine chloride (NC) is a botanical drug renowned for its potent anti-inflammatory, antimalarial, and hepatocellular carcinoma-inhibiting properties; however, its limited solubility poses challenges to its development and application. To address this issue, we have devised a colon-targeted delivery system (NC-CS/PT-NPs) aimed at modulating the dysbiosis of the gut microbiota by augmenting the interaction between NC and the intestinal microbiota, thereby exerting an effect against nonalcoholic fatty liver disease.Methods The NC-CS/PT-NPs were synthesized using the ion gel method. Subsequently, the particle size distribution, morphology, drug loading efficiency, and release behavior of the NC-CS/PT-NPs were characterized. Furthermore, the impact of NC-CS/PT-NPs on non-alcoholic fatty liver disease (NAFLD) induced by a high-fat diet (HFD) in mice was investigated through serum biochemical analysis, ELISA, and histochemical staining. Additionally, the influence of NC-CS/PT-NPs on intestinal microbiota was analyzed using 16S rDNA gene sequencing.Results The nanoparticles prepared in this study have an average particle size of (255.9±5.10) nm, with an encapsulation rate of (72.83±2.13) % and a drug loading of (4.65±0.44) %. In vitro release experiments demonstrated that the cumulative release rate in the stomach and small intestine was lower than 22.0%, while it reached 66.75% in the colon. In vivo experiments conducted on HFD-induced NAFLD mice showed that treatment with NC-CS/PT-NPs inhibited weight gain, decreased serum aspartate aminotransferase (AST), Alanine aminotransferase (ALT) and lipid levels, improved liver and intestinal inflammation, and altered the diversity of gut microbiota in mice.Conclusion This study provides new evidence for the treatment of NAFLD through the regulation of gut microbiota using active ingredients from traditional Chinese medicine.
研究领域:
药学
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生物技术
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胃肠病学
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代谢学
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PubMed
高影响因子
FERROELECTRICS
·
2024
·
IF 0.6
Chenghong Huang,Xiaorong Huang,Qi Yin,Xuehan Hu,Ying Fang,Hongjie Chen,Lin Zhang,Kang Yang,Hao Li,Fang Yang,Xiaoling Lu,Zeng Yang
Chitosan (CS) is lack of applications in pharmaceutical industry due to its lower compression density and instability during tablet process. This study mainly focus on the synthesis of ethyl vanillin incorporated CS(EV/CS) via Schiff base reaction and the evaluation of application as pharmaceutic excipient. Results of FT-IR showed that there is a typical amide peak in EV/CS that the 1640 cm−1 can be attributed to –C = N– bond and 1518 cm−1 can be attributed to backbone of benzene but not in CS raw material. Compared with the control, XRD of EV/CS have additional 2θ angle of 44°, 64° and 77° diffraction peaks except that the 2θ = 20° of EV is still existed. More slower weight loss of EV/CS than that of CS in the range of 248–760 °C is also demonstrated by TGA analysis. 1H NMR indicated there are intrinsic 7.5 and 7.1 ppm as well as emerging 4.2 ppm of chemical shift in EV/CS. The physical finger spectra from twelve indexes of EV/CS powder denotes quite differences in compressibility, fluidity and stability with that of CS. 5% content EV/CS of designed formulation can at most decrease the friability and disintegration time of the compressed tablet. In conclusion, the developed EV/CS is inclined to suitable for tablet as an excipient.
研究领域:
药学
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材料科学
·
化学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Nana Tang,Aiting Chen,Yanping Wei,Shuting Shi,Chuanqin Zhou,Quanguo He,Jun Liu
Acyclovir (Acyclovir, ACV) is an antiviral drug which, despite its favorable safety profile, can have systemic adverse effects, following improper use. This study prepared a clay-like two-dimensional transition metal carbide Ti 3 C 2 by etching Ti 3 AlC 2 with LiF and HCl. Carboxylated multi walled carbon nanotubes (Carboxylated multi-walled carbon nanotubes , MWCNTs-COOH) were combined with Ti 3 C 2 using chitosan (Chitosan, CS) as solvent and ultrasonic treatment . The nanocomposite was then modified onto the surface of a glassy carbon electrode (Glassy carbon electrode, GCE) to develop an electrochemical sensor for the detection of ACV. The Ti 3 C 2 -CS-MWCNTs-COOH/GCE nanocomposite was characterized by X-ray diffractometry (X-ray diffractometry, XRD), scanning electron microscope (Scanning electron microscope，SEM), and cyclic voltammetry (Cyclic voltammetry，CV), as well as the electrochemical impedance method (Electrochemical impedance，EIS). The successful preparation of Ti 3 C 2 -CS-MWCNTs-COOH, and the good electrochemical performance of the electrode were verified. Linear scanning voltammetry (Linear scan voltammetry，LSV) was used to quantify the ACV. The linear range of the method is wider than other works (0.05 ∼ 20.0 and 20.0 ∼ 500.0 μM), with a low detection limit (0.088 μM). The sensor achieves sensitive detection of ACV and can be used for the analysis of ACV in pharmaceutical and urine dosage forms , with recoveries of 95.5∼97.6% and 95.6∼97.5%, respectively. For the first time, this sensor utilizes clay-like Ti 3 C 2 with a larger specific surface area in combination with MWCNTs-COOH for ACV detection, which exhibits excellent immunity to interference, repeatability, reproducibility, and stability. This method provides a rapid and sensitive method for the determination of ACV, and lays foundations for developing miniaturized field rapid test detectors.
研究领域:
药理学
·
分析化学
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高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Xuehua Dong,Ying Long,Xiaoyu Zhao,Ling Huang,Hongmei Zeng,Zhien Lin,Xin Wang,Guohong Zou
Two new antimony fluoride sulfates named A6Sb4F12(SO4)3 (A = Rb, Cs) with unique crown-like clusters have been successfully synthesized by introducing Sb3+ with a stereochemically active lone pair in the sulfate system through a facile hydrothermal method. The structure regulation induced by the cation sizes results in the symmetry difference in these two title compounds, i.e., Rb6Sb4F12(SO4)3 crystallizing in the polar noncentrosymmetric (NCS) space group of P3 and Cs6Sb4F12(SO4)3 in the centrosymmetric (CS) space group of P1̅. Detailed characterizations, including XRD, thermal behaviors, optical properties, and the theoretical calculations, for these two compounds have been performed. The discovery of the unique crown-like clusters observed in A6Sb4F12(SO4)3 (A = Rb, Cs) enriches the diversity of structures for antimony sulfates systems. Simultaneously, a summary and comparison for all reported antimony halide sulfates has been made to illustrate the synergistic effect of the stoichiometric ratio and cation sizes on the macroscopic centricity and the framework structure, which will guide the systematical discovery of antimony(III)-based functional materials in future.
研究领域:
无机化学
·
材料科学
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高影响因子
危险品化学品经营许可证（带存储）