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.
研究领域:
环境科学
·
纳米技术
·
材料科学
·
辐射化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Nuanfei Zhu,Kuijing Yuan,Dinghui Xiong,Fengxiang Ai,Kun Zeng,Biying Zhao,Zhen Zhang,Hongjun Zhao
Dietary intake is an important exposure pathway of environmental bisphenols including bisphenol S (BPS, a typical emerging organic pollutant). However, available data on the occurrence and risk assessment of BPS in food samples are limited due to the lack of high-throughput analytical methods. Herein, based on H 2 O 2 inducing fluorescence turn-off signals, a sensitive and high-throughput fluorescence enzyme-linked immunosorbent assay (FELISA) was developed for BPS investigation in beverages. In this system, the fluorescence of copper nanoclusters in ZIF-8 (CuNCs-CS@ZIF-8) could be quenched with the presence of H 2 O 2 owing to the strong oxidation, being served as signal amplification in FELISA. Meanwhile, the aggregation-induced emission (AIE) fluorescence enhancement of CuNCs-CS through the conformational locking of ZIF-8 provided an effective strategy to overcome the intrinsic limitations of FELISA including high background, serious fluorescence quenching in the detection of real samples. Thus, the integration of AIE building blocks into porous ZIF-8 showed obvious advantages in enhancing the analytical performance of FELISA. Under optimized conditions, satisfactory results with good accuracy were achieved in this proposed FELISA, which was applied for the systematic investigation of BPS in foods and further health risk assessments. The results after 100 beverages analysis displayed an average detection frequency of 55%, and the detected concentration of BPS ranged from below the limit of quantification (LOQ) to 12.08 ng/mL with a mean value of 1.717 ng/mL. Besides, the estimated daily intake (EDI) of BPS was calculated to be 0.05449–4.483 ng/kg-bw/day, in which milk–tea drinks contributed to the majority of BPS daily intake (mean EDI = 4.483 ng/kg-bw/day). And the hazard quotient (HQ) according to EDI values indicated that BPS exposure in beverages might not make a considerable impact on human health.
研究领域:
环境科学
·
食品科学
·
免疫学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Yu-Heng Mao,Ang-Xin Song,Long-Qing Li,Yan Yang,Zhong-Ping Yao,Jian-Yong Wu
This work was to examine the impact of power ultrasound (US) on the molecular properties of a high-molecular weight (MW) exopolysaccharide (EPS) from the Cs-HK1 medicinal fungus and the utilization, and prebiotic function of the US-treated EPS fractions in human fecal microflora in vitro . The US treatment caused notable reduction of intrinsic viscosity, average MW and aggregate size of EPS in water but no significant changes in the molecular structure. The US-treated EPS fractions were consumed more rapidly by the fecal microflora, resulting in a higher total level of short chain fatty acids. They also affected the relative abundance in the microflora more beneficially than the original EPS. The results suggest that power US is effective for modifying and improving the prebiotic properties of high-MW polysaccharides.
研究领域:
食品科学
·
微生物学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Qiuping Fu,Jie Lou,Hui Yuan,Rongbin Zhang,Chunmei Zhang,Changli Mo,Jun Luo,Lei Zha,Pan Wu
ZIF-67@CS composites were prepared by in-situ growth method. The phase and structure of ZIF-67@CS composite were characterized by X-ray powder diffraction (XRD) and fourier transform infrared spectroscopy (FT-IR). The morphology of the materials was characterized by field emission scanning electron microscope (SEM). X-ray photoelectron spectroscopy (XPS) measurements demonstrated the existence of Pb(II) after the adsorption process of composite materials. The adsorption of Pb(II) by composite material conforms to Langmuir model, the theoretical maximum adsorption capacity is 505.051 mg/g. The pseudo-second-order kinetic model can well describe the adsorption kinetic process.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Ying Cheng,Bing-Yue Fan,Yu-Ling Qi,Guo-Zhi Han
Among the nuclides in radioactive wastewater, strontium (90Sr) is a highly toxic water-soluble fission product, which will be extremely harmful to the ecological environment and consequently bring great risk to human health. Therefore, the removal of the strontium element from the aquatic environment is increasingly attracting the attention of the scientific community. In this paper, using poly(vinyl alcohol) (PVA) and chitosan (CS) as raw materials and glutaraldehyde as a cross-linking agent, a kind of interpenetrating PVA/CS hydrogel microsphere was prepared by a facile reversed-phase emulsion method. On this basis, the mechanical strength and stability of the hydrogel microspheres were further enhanced by a freezing–thawing technique. It was discovered that synthetic hydrogel microspheres can effectively remove Sr2+ ions from radioactive wastewater. The influences of the mass ratio of PVA to CS, initial concentrations of Sr2+, pH value, and adsorption times, along with competitive metal ions and nuclides, on the adsorption performance of the hydrogel microspheres were further systematically investigated. Especially, it was found that the freezing–thawing process significantly improved the adsorption capacity of the hydrogel microspheres for strontium ions, and the maximum adsorption capacity of the PVA/CS hydrogel microspheres for Sr2+ was as high as 205.45 mg/g, which was superior to the results of most similar adsorbents at present. Especially, the PVA/CS hydrogel microspheres still maintained satisfactory adsorption capacity and a high degree of sphericity after seven cycles. Furthermore, through the analysis of kinetics and thermodynamics of the adsorption process, a plausible adsorption mechanism was proposed, which will be helpful for designing and constructing adsorbents to remove radioactive ions from aquatic environments.
研究领域:
环境科学
·
材料科学
·
核废物处理
·
水污染控制
·
吸附技术
✓ 已验证
产品关联
DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2022
·Vol. 39
·期 9
·2200073
·
IF 3.467
Hengbin Mao,Lei Wang,Junhui Li,Xin Jiang,Shiwei Xue,Mingliang Li,Jinpeng Zhu,Bingbing Fan,Tingting Xu,Gang Shao,Hongliang Xu,Hailong Wang,Rui Zhang,Hongxia Lu
All-inorganic perovskite nanocrystals (NCs) have been widely used in many fields due to their excellent photoelectric properties. However, the instability of their structure and the high lead content need to be solved. Herein, the concept of “High-entropy” is introduced into NCs to prepare High-entropy perovskite Cs(Pb 1/3 Mn 1/3 Ni 1/3 )Br 3 NCs by high-energy ball milling method. The effects of milling time and doping ratio of B-site elements on the structure and performance of perovskite NCs are studied. It is found that Mn 2+ and Ni 2+ successfully enter the lattice of Pb 2+ to form “High-entropy” perovskite NCs. In addition, compared with Cs(Pb 0.72 Mn 0.14 Ni 0.14 )Br 3 NCs, Cs(Pb 1/3 Mn 1/3 Ni 1/3 )Br 3 NCs have greater luminous intensity and stability, which because of the enhancement of band gap and valence bonds. Furthermore, photoluminescence intensity at 515 nm increase obviously when Cs(Pb 1/3 Mn 1/3 Ni 1/3 )Br 3 NCs are heated at 120 °C. This is due to the lattice distortion effect brought about by ion doping. This study is expected to provide an effective way for synthesis and stability of all-inorganic perovskite NCs doped with more kinds of different ions. Moreover, it also lays the foundation for the introduction of “High-entropy” into perovskite functional ceramics.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Chenxi Feng,Junyang Liu,Kai Zhao,Lei Wang,Zengxi Li,Guoliang Zhang,Chunshan Li
Methyl methacrylate (MMA) synthesis via aldol condensation of methyl propionate with formaldehyde over Cs-based supported catalysts is intensively investigated, while the effect of their pore structures on catalytic performance still lacks in-depth understanding. Herein, series of Cs-Zr/SiO 2 catalysts with different pore structures were prepared for this aldol condensation. The physicochemical characteristics of as-prepared Cs-Zr/SiO 2 catalysts were characterized using physical N 2 adsorption–desorption isotherms and CO 2 -/NH 3 -TPD. In addition, the impact of pore structure on mass transfer, adsorption, and desorption of reactants and products was studied through in situ DRIFTS. The results show that the acid and base site densities elevated with the increasing pore volume. The mass transfer of reactants and products could be promoted with increasing pore size, while their adsorption energies exhibited a volcanic trend. As a result, the Cs-Zr/SiO 2 catalysts having average pore diameter of 12-18 nm and acid-base balance was considered as the optimal candidate for MMA production.
研究领域:
催化化学
·
材料科学
✓ 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.
研究领域:
材料科学
·
药物递送
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2013
·
IF 1.7
Chen Chen,Chunmei Gao,Mingzhu Liu,Shaoyu Lǚ,Chuanming Yu,Sheng Ma,Junyan Wang,Guijia Cui
Cationic polymers have been widely used as drug delivery systems. Herein, an oxidized sodium alginate/chitosan (OSA/CS) core–shell microgel was prepared via water-in-oil emulsion method. Morphological properties of the resulting microgel were determined by transmission electron microscopy, hydrodynamic diameter of the microgel was characterized by dynamic light scattering. The objective of this work was to achieve the colon-specific delivery of an antiulcerative colitis drug using a fully nontoxic carrier. 5-aminosalicylic acid (5-ASA) was chosen as a model drug, which is rapidly absorbed before entering the colon, thus it is necessary to develop a colon-specific delivery system for it. The in vitro drug release profile was established in buffer solutions with 0.1 M HCl/NaCl (pH 1.2) and 0.1 M phosphate buffered saline (pH 7.4) at 37 °C. The results indicated that this OSA/CS core–shell microgel inhibited the release of 5-ASA in stomach to a certain extent and is degradable in physiological conditions. Due to the excellent biocompatible nature of CS and OSA, this core–shell microgel has good biocompatibility and may have potential applications in oral controlled drug delivery systems.
研究领域:
药剂学
·
生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jinchang Zhang,Xuefeng Cheng,Jicai Jiang,Apiladda Pattanateeradetch,Shuai Shi,Chanat Chokejaroenrat,Qingfeng Xu,Jianmei Lu
Selective enrichment of cesium ions (Cs+) at ultralow concentrations is essential for resource recovery and radioactive waste disposal, yet efficient adsorbents are lacking. Herein, we reported a Prussian blue analogue (K2Cu3(Fe(CN)6)2, Cu-PBA) decorated on MXene nanosheets by in situ fabrication, forming a composite material termed PMX, for enhanced adsorption of Cs+ in acidic solutions and seawater. The stable, negatively charged MXene effectively anchors Cu2+ precursors and promotes Cs+ adsorption. The synergistic interaction between MXene and the in situ-synthesized Cu-PBA significantly enhances the adsorption performance and water stability of PMX in both acidic solutions and seawater. PMX achieves rapid adsorption equilibrium within 5 min, with a high adsorption capacity of 408.2 mg/g at pH 1, surpassing conventional adsorbents. Moreover, PMX shows excellent Cs+ selectivity (Kd = 68,361.7 mL/g), cycle stability, and notable anti-irradiation ability, demonstrating superior efficiency in Cs+ enrichment from complex matrices. The adsorption mechanism involves electrostatic attraction and K+/Cs+ ion exchange, facilitated by MXene’s functional groups and the Cu-PBA structure. These findings underscore the excellent potential of PMX as an efficient adsorbent for resource enrichment and the removal of radioactive elements such as Cs+.
研究领域:
材料科学
·
环境科学
·
核化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 4
Xu Nan,Qiu Guo-Fang,Jin Li-Ping,Ji Chen-Peng,Gu Cong-Ke,He Ling-Xin,Guo Wen-Wen
In this study, a novel CS@SA@ZIF-67 core-shell nano-hybrid was synthesized using zeolitic imidazole framework-67 (ZIF-67) as a template and CS@SA@ZIF-67 as a modifier. Then, flame-retardant nanocomposites (EP/CS@SA@ZIF-67) were obtained by combining the hybrid with epoxy resins. The microstructure and morphology of CS@SA@ZIF-67 and the residual chars were explored using Fourier transform infrared (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD), and the effect of the obtained hybrid materials on the fire performance of the epoxy resins was characterized. Compared with the flame retardant system composed of ZIF-67 and pure EP, the hybrid flame retardant composites exhibited low total heat release and smoke production. The thermogravimetric analysis (TGA) results showed that the maximum thermal decomposition temperature of the EP/CS@SA@ZIF-67 based composite coating was stabilized at the highest value (378.2 and 563.9 °C) so that the introduction of CS@SA@ZIF-67 could improve the thermal properties of the EP/CS@SA@ZIF-67 composites to a certain extent. Meanwhile, the cone test results indicated that the peak heat release rate pHRR of the CS@SA@ZIF-67 filled EP composite was reduced by 18.43% compared to that of pure EP, implying enhanced flame retardancy. The enhanced thermal stability and flame retardancy of the CS@SA@ZIF-67 composites were mainly ascribed to the catalytic effect and carbonization ability of CS@SA@ZIF-67.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 30
·e55692
·
IF 2.7
Yang Meng,Mengke Shi,Wenbo Feng,Lingji Zhang,Hongzhong Zhang,Xiaojing Zhang
This study prepares a series of hollow-structured CS/SA/POSS composite gel spheres with a diameter of ~2.5 mm by using hydrophilic Janus-type polyhedral oligomeric silsesquioxane (AS-POSS) as a crosslinking agent in combination with sodium alginate and chitosan via electrostatic adsorption/free radical polymerization. As the content of POSS increases, the wall thickness of the gel spheres also increases from 20 to 30 μm, leading to a more compact and smooth wall structure in the polymerized CS/SA/POSS composite gel spheres. Additionally, the introduction and polymerization of POSS significantly enhance the stability, drug loading rate, and entrapment rate of the gel spheres, providing them with improved drug release capabilities. For hydrophilic drug doxorubicin, the loading rate and encapsulation rate reach 41.2% and 79.9%, respectively, while for the hydrophobic drug ibuprofen, they are 14.7% and 76.3%. Compared to some previously reported drug-loaded gel materials, the gels prepared in this study demonstrate relatively higher drug loading performance. Thus, these hollow-structured CS/SA/POSS composite gel spheres hold promise as innovative drug carriers in the biomedical field.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）