Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xinyan Wang,Yuting Zhang,Jian Zhang,Chengpeng Shao,Jiaxing Yang,Yuning Zhang,Ruoyi Li,Zheng Xing
In this study, a Z-type heterojunction photocatalyst CoWO 4 /CS/BiOCl-10 was constructed by hydrothermal synthesis for the efficient removal of norfloxacin (NOR) contaminants in water. X-ray photoelectron spectroscopy (XPS) combined with Fourier transform infrared spectroscopy (FT-IR) confirmed that the hydroxyl group in the chitosan (CS) molecule was bonded with the oxygen atom on the surface of CoWO 4 through hydrogen bonding to form a directional charge transport channel, which greatly improved the photocatalytic degradation efficiency of CoWO 4 /CS/BiOCl-10, and the degradation rate was as high as 98.30 % within 90 min under 300 W xenon lamp irradiation. Optoelectronic measurements show that the interfacial potential difference drives electrons to migrate along the Z-path. Density functional theory (DFT) and liquid chromatography-mass spectrometry (LC-MS) were used to identify intermediates in the NOR degradation process, revealing the degradation pathway of NOR through piperazine ring cleavage and defluorination. The kinetics of NOR degradation intermediates were revealed using two-dimensional correlation spectroscopy (2DCOS) techniques. Rice seed germination experiments have shown that the degraded NOR solution is virtually non-toxic, greatly reducing the environmental impact. This study provides a new strategy for the development of efficient photocatalytic systems through the synergistic regulation mechanism of hydrogen bonding and heterojunction.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiaomin Feng,Huijin Xu,Lingling Bai,Jiyuan Yang,Wenge Yang,Yonghong Hu
In this study, astragalus polysaccharide / hydroxypropyl-β-cyclodextrin (APS@HP-β-CD) was efficiently loaded into polycaprolactone/chitosan (PCL/CS) by electrospinning and encapsulation techniques. Then, using Span80 as an emulsifier, PCL/CS/APS@HP-β-CD nanofibers were produced through electrospinning of water-in-oil emulsions. The physicochemical and antimicrobial properties of the nanofibrous materials were subsequently evaluated in vitro. Compared with the PCL/CS nanofiber membranes (PC membrane) without added active substances, the tensile test showed that the flexibility of the PCL/CS/APS@HP-β-CD nanofiber membrane (PCA membrane) was significantly enhanced. The thermodynamic test results show that the thermal stability of the PCA membrane is enhanced. The results of 1 H NMR, FTIR, and XRD showed that APS was successfully encapsulated in HP-β-CD. The biodegradation test results showed that the PC and PCA nanofiber membranes had no pollution to the environment and could biodegrade. In addition, PCA membranes exhibited strong antibacterial activity against both Gram-positive and Gram-negative bacteria as well as outstanding free radical scavenging capacity. The APS release mechanism was determined through the Higuchi and Korsmeyer-Peppas kinetic models. Among all the PCA nanofiber membranes, the APS release was more consistent with the Korsmeyer-Peppas kinetic model, and the transport mechanism was Fickian diffusion. Finally, this study also optimized the experimental protocol by introducing carboxymethyl groups to modify PCL/CS nanofiber membranes by chemical grafting. In conclusion, the PCA nanofibrous membranes prepared in this study have a strong potential to become wound dressings.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2020
·
IF 2.69
Juan Wu,Xi Wang,Binglong Zhu,Qinting He,Fang Ren,Fei Tong,Wei Jiang,Xianghong He
Cancer is one of the biggest killers threat to human life and health and is still difficult to treat mainly due to the lack of targeted drug delivery stages and limitations associated with delivering drugs to targeted cancer tissues. The goal of this work was to develop a magnetic, pH-sensitive formulation for targeted delivery of chemotherapeutic agents to cancer cells. Then the functional drug delivery system (Fe3O4@CS/PEG-DOX) was synthesized by the layer-by-layer (LbL) self-assembly technique. And the drug loading content is calculated to be 19.1%. In addition, the Fe3O4@CS/PEG-DOX exhibited excellent pH-sensitivity, 73.1% DOX was released within 48 h at pH 4.0. Furthermore, all the release behaviors fit the Higuchi model very well and the dissolution of CS/PEG layers played a key role on DOX release from Fe3O4@CS/PEG-DOX. The results of toxicity analysis in human liver hepatocellular carcinoma cells (HepG2) revealed that Fe3O4@CS/PEG-DOX exhibited high anti-tumor activity, while the Fe3O4@CS/PEG nanocomposites were practically non-toxic. Therefore, all the results demonstrated that the Fe3O4@CS/PEG-DOX could have an important impact on the development of targeted intracellular delivery nanodevices for cancer therapy.
研究领域:
药学
·
纳米技术
·
癌症研究
·
药物递送系统
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Yumiao Niu,Yan Xiao,Yidan Chen,Chu Chu,Daqing Yang,Ying Wang,Bing-Bing Zhang
The disulfide dianion [S2]2–, as an important structural motif in sulfides, can incorporate isolated S2– to form homoatomic heteroleptic polyhedra [MSx(S2)y]. However, the sulfides that contain [MSx(S2)y] units have been rarely reported and have not been systematically investigated as infrared (IR) nonlinear optical (NLO) materials. It is verified in this work that the homoatomic heteroleptic coordination strategy enhances local structural asymmetry, leading to improved optical anisotropy and NLO performance. Three compounds, namely, ANb2PS10(A = K,Rb,Cs), were identified and prepared. They exhibit a large phase-matchable second-harmonic generation (SHG) response, with KNb2PS10, RbNb2PS10, and CsNb2PS10 showing the effects of 1.5, 2.2, and 1.8 (×AgGaS2@2090 nm), respectively, and large birefringence (Δn = 0.39@546 nm) with KNb2PS10 as a representative. The first-principles calculations indicate that [Nb2S4(S2)4]8– units play a dominant role in inducing strong SHG responses and large birefringence. By validating the homoatomic heteroleptic coordination strategy, this work opens avenues for the design of advanced optical materials.
研究领域:
材料科学
·
光学材料
·
无机化学
·
非线性光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Technological Sciences
·
2026
·Vol. 69
·期 4
·1420501
·
IF 5.1
Zhang Mingdong,Zhang Yan,Yuan Aocheng,Feng Meiling,Mu Jingli
Metal sulfide ion exchangers (MSIEs) are promising for radioactive wastewater treatment due to their soft S 2− -containing frameworks and ion-exchange capabilities. However, their fine powder form and susceptibility to competing ions limit practical application in complex water matrices. Herein, we developed a novel MSIE-based composite, K 2 ZnSn 2 S 6 nanosheets/cationic polyacrylamide (KZTS-NS/CPAM) flocs, integrated with an improved accumulative countercurrent adsorption (iACA) process for effective Cs + , Sr 2+ , and Co 2+ removal. The composite flocs exhibited good settling performance, achieving complete sedimentation within 40 s. Their maximum adsorption capacities ( q m ) reached 106.7, 43.54, and 40.54 mg/g for Cs + , Sr 2+ , and Co 2+ , respectively, close to or even higher than those of KZTS-NS. The adsorption kinetics were rapid, reaching equilibrium within 40 min. Furthermore, the flocs showed broad pH tolerance (removal efficiencies ⩾86.93% for Cs + at pH 4–11, ⩾95.10% for Sr 2+ at pH 3–12, and ⩾96.17% for Co 2+ at pH 1–8) and ultrahigh selectivity for Co 2+ (distribution coefficients up to 6.63×10 6 mL/g under competitive conditions). When integrated with the iACA process, >93% of Cs + and >99% of Sr 2+ and Co 2+ were removed from tap water. Notably, 93.76% of Co 2+ was removed from seawater without microfiltration, benefiting from both the composite’s strong selectivity and excellent settling behavior. The average turbidity of the effluents was as low as 28.6 NTU. Thus, no additional solid-liquid separation step was needed. Mechanistic studies confirmed three key pathways: (1) ion exchange between Cs + /Sr 2+ /Co 2+ and interlayer K + in KZTS-NS; (2) amide complexation by CPAM for Sr 2+ and Co 2+ ; and (3) surface precipitation for Co 2+ forming Co 1.2 Zn 2.8 S 4 . Overall, this material-process integration provides an innovative strategy for radionuclide remediation in actual and high-salinity water environments, offering new insights into the design of processable composite adsorbents and advanced treatment processes.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Uddin Shahab,Ullah Inam,Liu Yiyao,Bai Lu,Duan Jiangong,Yue Zhaorong,Hui Li,Wang Xin,Li Yang,Jingli Zhu,Li Hongyu
Periodontitis is a progressive disease that is difficult to diagnose and treat. This causes pain, chewing difficulty, and ultimately teeth exfoliation, caused by harmful oral biofilms. The need for a rapid method for sample enrichment is essential for accurate diagnosis due to the presence of pathogenic bacteria in saliva at low concentrations. Novel vancomycin-grafted chitosan-coated magnetic nanocarriers (Vm-CS-MNCs) were made in this study. They effectively capture and extract DNA from gram-positive bacteria in saliva for PCR gene-sensing. The purpose of chitosan coating was to enhance biocompatibility and water solubility, while vancomycin acts as a universal probe to selectively target gram-positive bacteria ( Staphylococcus aureus ATCC 29213) . X-ray photoelectron spectroscopy, FTIR, XRD, and energy-dispersive X-ray spectroscopy were used to validate the successful coating of chitosan and grafting of vancomycin onto magnetic nanocarriers. Significantly, Vm-CS-MNCs achieved a capture efficiency of over 95% at bacterial concentration as low as 10^1 CFU/mL within 20 min of enrichment. Finally, when coupled with PCR, Vm-CS-MNCs demonstrated significant pre-concentration ability for S. aureus in saliva, reducing the limit of detection (LOD) to 10 CFU/mL. This signifies a 1,000-times enhancement in diagnostic sensitivity as compared to PCR without pre-concentration. The bacterial capture ability of these nanocarriers enabled a highly sensitive pathogen gene-sensing method. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xinpeng Gao,Yuxian Liu,Ying Han,Jing Zhang,Jiwen Guan,Fengping Xiao,Peng Hu,Jiao Gao,Yubao Chen
Room-temperature sodium–sulfur (RT Na-S) batteries are promising candidates for large-scale grid energy storage applications due to the abundant availability of sodium resources and their low acquisition cost. However, the shuttling effect of long-chain sodium polysulfides severely degrades the cycle stability of RT Na-S batteries. In this study, a biomass-derived (corn-straw) porous carbon material with self-doped nitrogen and oxygen atoms was fabricated as a sulfur host (denoted as NOC). Sulfur was subsequently loaded covalently via the vapor-infiltration method to form the cathode material for RT Na-S batteries. Owing to the high cellulose content in corn-straw, the derived NOC composite exhibits excellent electrical conductivity and large pores, which facilitate Na + transport and accommodate the volume expansion of active sulfur during cycling. More importantly, theoretical calculation reveals that compared to pure carbon matrices, the N and O dopants make carbon become unsaturated, increasing the electron density distribution and enhancing bonding ability to form C S bonds. When used as a cathode, in-situ Raman and ex-situ XRD measurements confirm that covalently bonded sulfur inhibits the shuttle effect by directly forming Na 2 S during the reduction reaction. Consequently, the NOC/S cathode delivers superior electrochemical performances with excellent cycle stability. This study introduces an innovative approach to developing advanced RT Na-S batteries by utilizing cost-effective carbon materials derived from biomass.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Qin Liu,Ying Leng,Hui Sun
Hydrogen evolution reaction (HER) of water is currently one of the most potential ‘green hydrogen’ production technology to alleviate the energy scarcity and environmental contamination. In this study, ultrafine platinum/nickel bimetallic nanoparticles loaded porous carbon nanocomposite, noted as PtNi/Cs, is facilely prepared by employing the precipitation polymerization of a poly (amic acid) (PAA), which shows superior catalytic performance toward HER. The synthesis of PAA is achieved via a stepwise polymerization of 4,6-diaminino-2-mercaptopyrimidine and pyromellitic dianhydride at room temperature , and the porous precursor is formed during the polymerization. Upon pyrolysis of the precursor in an inert atmosphere , carbon nanoaggregates with inherited porosity are fabricated. Ultrafine PtNi bimetallic nanoparticles with size of 3.3 ± 0.7 nm can be efficiently deposited, exhibiting an overpotential of 26.4 mV at 10 mA cm −2 and a mass activity of 2.92 A mg Pt −1 , superior than commercial Pt/C of 36.8 mV. The excellent HER performance can be attributed to the formation of ultrafine PtNi bimetallic nanoparticles and the electron transfer from PtNi to the nitrogen atoms on the carbon support.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能量转换
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Chunyan Zhang,Shuan Zhang,Yilei Jia,Yueyun Li,Ping Wang,Qing Liu,Zhen Xu,Xinjin Li,Yunhui Dong
An ultrasensitive sandwich-type electrochemical immunosensor was designed by using gold nanoparticles (Au NPs) as the substrate material and microporous carbon spheres (CS) loading silver nanoparticles (Ag NPs) spaced Hemin/reduced graphene oxide (Hemin/rGO) porous composite materials (Ag NPs@CS-Hemin/rGO) as the detection antibodies (Ab 2 ) label for detecting carcinoembryonic antigen (CEA). The Au NPs with good electrical conductivity and biocompatibility could accelerate the electron transfer on the electrode interface and enhance the load capacity of capture antibodies (Ab 1 ). Hemin is peroxidase-like substance which has excellent catalytic ability for H 2 O 2 reduction but easy to molecular aggregation and oxidative self-destruction. Reduced graphene oxide (rGO) is a good supporting material for Hemin to mitigate this disadvantage. CS loading Ag NPs (Ag NPs@CS) as the spacer inserts into Hemin/rGO sheet can overcome the irreversible stacking of rGO, and form complex porous structure which exposes more active sites of Hemin. Moreover, Ag NPs loaded on CS also has catalytic ability for H 2 O 2 reduction. Thus the Ag NPs@CS-Hemin/rGO used as the Ab 2 label has a large working surface area and high utilization rate, which heightens the catalytic ability for H 2 O 2 reduction to amplify the current signal effectually. The current signal and the logarithm of CEA concentration presented a wide linear response range of 20 fg/mL to 200 ng/mL, and the detection limit of CEA was 6.7 fg/mL. Furthermore, the designed immunosensor exhibited a good reproducibility, selectivity and stability, which confirms a broad development prospect when applying it in early clinical detection.
研究领域:
生物医学工程
·
分析化学
·
纳米技术
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2021
·
IF 4.076
Xiaoya Weng,Chensheng Lin,Guang Peng,Huixin Fan,Xin Zhao,Kaichuang Chen,Min Luo,Ning Ye
The first tellurium(II) thiourea sulfate semiorganic nonlinear optical (NLO) material, Te(CS(NH2)2)4SO4·2H2O, was successfully obtained using the slow evaporation technique. The structure of this metal-free crystal featured three types of NLO-active units, namely CS(NH2)2, (SO4)2–, and (TeS4)6–, which synergistically contributed to its moderate second harmonic generation response (2.4 × KDP@1064 nm) and large birefringence (0.210@546.1 nm). Remarkably, this is the first example in which the quadrangular (TeS4)6– groups significantly contributed to the SHG effect and birefringence, and the first principles calculations revealed its special mechanism of NLO activity. These findings highlighted the exploration of semiorganic NLO materials and provide new opportunities for the discovery of new NLO crystals.
研究领域:
晶体学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiashuo Hu,Chengwang Zhao,Yanxiao Si,Chen Hong,Yi Xing,Yijie Wang,Wei Ling,Weibo Feng,Lihui Feng
In light of the depletion of fossil resources, global warming, and other energy and environmental challenges, the utilization of biomass as an energy storage solution holds tremendous promise. In this research, Chitosan (CS)/CH 3 COOH/(CH 3 COO) 2 Zn hydrogels were produced through a cross-linking process that involves both ionic bonding and hydrogen bonding. Subsequently, CS carbon aerogels with extremely fine microporous structures were manufactured via freeze-drying, carbonization , and activation processes utilizing the Zn-Zn system. The dehydrating agent and activator used was ZnCl 2, whereas in situ doping of Zn 2+ in the carbon precursor functioned as an activation assistant. The activated CS carbon aerogel ACS-Zn20-700 prepared at 700 °C had a specific surface area of 857.47 m 2 /g, a microporous ratio of 89.44%, a pyridine-N content of 35.58%. The distribution of micropores and ultrafine pores facilitates effective connection and ion transport at the electrode–electrolyte interface, leading to an increase in the number of active sites in carbon materials and ultimately improving their specific capacitance. Nitrogen-containing groups also provided additional pseudocapacitance. In a three-electrode system, ACS-Zn20-700 obtained a specific capacitance of 380.8F/g at the current density of 0.5 A/g. The ACS-Zn20-700 supercapacitor in the two-electrode system had an energy density of 12.8 kW h −1 (at 125 W kg −1 ) and a capacitance retention rate of 85.27% (at 10,000 cycles). The findings of this work serve as a useful reference for the development of environmentally friendly biomass-derived carbon aerogel materials as potential candidates for supercapacitor electrode applications.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Wen Zhang,Hongming Liu,Li Yan,Xi Mei,Zikang Hou
Developing of the multifunctional polymeric carrier for controlled drug release is still one of most challenging task. In this work, a pH-responsive dual drug delivery system was designed and prepared based on the zeolitic imidazolate framework-8 (ZIF-8). The poly(lactic acid)/chitosan (PLA/CS) core-shell nanofiber membranes by emulsion electrospinning, which the hydrophilic drug (Astragalus Polysacharin, APS) was encapsulated in the CS core and the hydrophobic drug (Camptothecin, CPT) was loaded into the PLA shell, respectively. Subsequently, ZIF-8 nanoparticles served as the protective layer were immobilized on the surface of PLA/CS to form multi-structural PLA/CS@ZIF-8 nanofiber membranes. In vitro drug release of nanofiber membranes were studied in the acidic and neutral medium, respectively. The results were that the hydrophilicity and surface roughness of nanofiber membranes rose with increasing of 2-MIM concentrations. The nanofiber membranes also had excellent pH-responsive and controlled release property. Furthermore, the drug release of PLA/CS@ZIF-8 for either APS or CPT were all carried out in a coexisting manner of diffusion and skeleton corrosion. In addition, in vitro cytotoxicity assay indicated nanofiber membranes with good cytocompatibility. Therefore, the multi-structured PLA/CS@ZIF-8 nanofiber membranes has been used as a potential pH-responsive dual drug release system.
✓ 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）