BIOMATERIALS
·
2025
·
IF 12.9
Yuping Zhang,Jianqi Deng,Mingbin Lang,Gang Shu,Jinbin Pan,Cai Zhang,Ran Cheng,Shao-Kai Sun
High atomic number elements-based X-ray computed tomography (CT) contrast agents offer a promising solution to address the inherent deficiencies of FDA-approved iodine contrast agents. However, they face substantial challenges in balancing imaging performance, safety, and large-scale production for clinical translation. Herein, inspired by the history of clinical gadolinium- and iodine-based contrast agents, we report a large-scale approach for synthesizing non-ionic bismuth (Bi) chelate for high-performance CT imaging in vivo . Bi-HPDO3A can be easily obtained from low-cost precursor within 4 steps at 6 g-scale. The non-ionic macrocyclic structure endows it with low osmolality, low viscosity, high stability, good renal clearable capability and biocompatibility. Additionally, Bi-HPDO3A realizes superior imaging performance across various in vivo applications, including gastrointestinal imaging, renal imaging, and computed tomography angiography (CTA). Especially, Bi-HPDO3A exhibits superior spectral imaging capability owing to the high K-edge of element Bi, achieving metal artifact-free CTA in vivo . The proposed Bi-HPDO3A that balances overall performance can serve as a high-performance CT contrast agent with potential for clinical translation.
研究领域:
医学影像学
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放射医学
·
药学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2020
·
IF 5.065
Yajing Pan,Xiao Sun,Man Qi,Ru Qin,Xiangjing Che,Yongqiang Zhang
The growing demand for vanadium and molybdenum in the high-tech industry has spurred researches into recycling from a variety of sources. A green and simple process for separation of vanadium and molybdenum was proposed by aqueous two-phase systems consisting of non-ionic surfactants (triblock copolymer, L35; octaphenyl polyoxyethylene, Triton X-100 and polyethylene glycol , PEG2000) and sodium sulfate without any extractant. The effects of aqueous pH, temperature, vanadium and molybdenum concentration，and different surfactants on separation performance of vanadium and molybdenum were systematically studied. The results indicated that the extraction rate of molybdenum and vanadium increased from 73% to 92% and from 11% to 30%, respectively, with increasing aqueous pH from 0.6 to 0.9. The extraction rate of vanadium decreased and the extraction rate of molybdenum increased with increasing temperature from 313.15 K to 343.15 K. Furthermore, with strengthening of molybdenum concentration from 1 g/L to 10 g/L and vanadium concentration from 1 g/L to 5 g/L, the extraction rate of vanadium and molybdenum increased. The sequence on separation efficiency of both metals is L35, Triton X-100 and PEG2000 from high to low. The extraction rate of molybdenum reached 91% and the extraction rate of vanadium was below 18% and the separation factor of both metals was above 47 under the optimal conditions of aqueous pH of 0.70–0.75 and extracting temperature of 343.15 K for L35 + Na 2 SO 4 + H 2 O aqueous two-phase system. It has obvious advantages in terms of safety production, environmental protection compared with traditional organic solvent extraction method .
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2014
·Vol. 161
·期 4
·D190
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IF 2.859
Hanyong Hua,Wenjing Wang,Xiumin Shi,Yanfeng He
The effect of intermolecular interaction of Phthalic acid (PA) and nonionic surfactants on electrodeposition was studied and the electrodeposition of tin was used as a model system. The CV curve of the electrolyte in the presence of a combination of PA and Triton X-100 (TX100) indicates that a relatively compact adlayer forms on the electrode surface and the electrodeposition of tin is inhibited very well. It is expected that the aromatic character of the hydrophobic moiety of both TX100 and PA enhance the binding interaction and the blocking effect is governed by the intermolecular interaction between PA and TX100. Scanning electron microscopic (SEM) image shows that a smooth, regular and compact deposit was obtained from the electrolyte with both PA and TX100. A relatively low carbon content of the deposit indicates that the incorporation of the additive in a deposit is strongly controlled in the presence of both PA and TX100. The possible explanation for the reduced incorporation may be proposed as the formation of the linkage of the molecules caused by intermolecular interaction between PA and TX100.
研究领域:
电化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Kaibo Huang,Jiahao Liang,Chad T. Jafvert,Qiuyue Li,Sishuo Chen,Xueqin Tao,Mengyao Zou,Zhi Dang,Guining Lu
The effects of ferric iron on the photo-treatment of simulated BDE-47 (2,2′,4,4′- tetrabromodiphenyl ether)-Brij35 (Polyoxyethylene lauryl ether) washing waste were studied to evaluate the influences of ferric iron on BDE-47 removal and Brij35 recovery. The results show that Fe 3+ accelerated BDE-47 degradation at lower concentrations (<0.5 mM) but attenuated it at higher concentrations (0.5–5 mM) and that Brij35 loss was increased with increasing Fe 3+ . These results likely are caused by changes in the rate of •OH production due to the ferric ion, association of Fe 3+ and electron transfer from Brij35, and light attenuation at high concentration. The BDE-47 and Brij35 had different degradation rates at different pH values and at different dissolved oxygen concentrations. The BDE-47 products were identified by gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS). The results indicated that BDE-47 transformed into mainly lower-brominated products, a few bromodibenzofurans, some rearrangement products, and some hydroxylated polybrominated diphenyl ethers . A series of Brij35 oxidization products were detected by ultra-performance liquid chromatography-high resolution mass spectrometry (UPLC-HRMS), including hydroxylation products, carboxylation products, and some hydrophilic chain-breaking products. Brij35 was mainly oxidized by Fe 3+ and/or reactive oxygen species (ROS) with the final products of CO 2 and H 2 O. The iron ions apparently cycled from ferric to ferrous ions in the micelles such that the Fe 3+ -Brij35 complex dominated the main redox reaction, leading to both BDE-47 and Brij35 degradation. It appears that in any applied soil washing system, the ferric ions in the washing waste need to be removed because of the adverse effects on BDE-47 removal and eluate reuse.
研究领域:
环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
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2024
·
IF 7.7
Yiming Wang,Fangwei Hou,Yining Gai,Xu Pan,Zongshan Zhao,Yaru Li
Microplastics (MPs) recycling, a promising approach to tackle its pollution, faces significant challenges due to the lack of effective separation methods. Herein, the optimized density separation accompanied with nonionic surfactants was employed to purify single MPs species from mixed systems. By adjusting the flotation fluid density, the single MPs can be separated from their mixtures in equal proportions (e.x., 97 ± 2% pure polyethylene terephthalate (PET) was extracted from polystyrene (PS)/PET mixed system). Under the optimized density separation conditions, nonionic surfactants of Tween 20 (TW20) enhanced the purity of the separated MPs for all MPs mixture systems (from 69%-85% to 76%–96%). The enhanced separations can be mainly attributed to adsorption of surfactant onto the surface of MPs which would alter hydrophilic and hydrophobic properties of MPs. But anionic surfactants could reduce or promote the separated efficiencies of MPs (e.x., the purity of separated polyvinylchloride increased by 4.8% in Thermoplastic polyurethanes/polyvinylchloride group by added sodium dodecyl benzene sulfonate, and the purity of PS decreased by 8.3% in PS/PET group in presence of hexadecyl trimethyl ammonium bromide). The efficient separations have also been obtained in simulated environmental aqueous experiments where TW20 promoted the separated purity of PET from 83.4% to 91.8% in the PS/PET group, consistent with the separation effect in the laboratory environment. This paper provided a convenient and cost-effective method to separate mixed MPs to high-purity MPs, which would be improve the quality of plastic recycling.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Electrocatalysis
·
2023
·
IF 3.1
Hu Xuemei,Zhou Jianping,Bao Jianqin,Zhang Yadong,Qiao Junqiang
In this work, hierarchical Cu 2 ZnSnS 4 electrocatalysts with different morphologies and stoichiometries were synthesized via the hydrothermal method and their electrocatalytic performances in hydrogen evolution reaction were evaluated. The morphologies of Cu 2 ZnSnS 4 electrocatalysts were modulated by adjusting the content of surfactants during the hydrothermal process. The stoichiometries of as-prepared Cu 2 ZnSnS 4 were found to be Cu 2 Zn 0.8 Sn 0.7 S 2.9 , Cu 2 Zn 0.7 Sn 1.2 S 4.7 and Cu 2 Zn 0.5 Sn 0.7 S 3.2 for the absence of surfactant and the addition of polyethylene glycol-(400) (PEG 400) and octylphenol polyoxyethyleneether-10 (OP 10) respectively. The Cu 2 ZnSnS 4 synthesized with the addition of PEG 400 displayed superior electrocatalytic activity in acid medium with an overpotential of 295 mV obtained at 10 mA cm − 2 and a Tafel slope of 133 mV dec − 1 . This work reveals that the stoichiometry and microstructure of Cu 2 ZnSnS 4 are critically important for its electrocatalytic activity while have less impact on the electrocatalytic durability, and provides useful information to explore the utilization of chalcogenides as the attractive electrocatalysts.
研究领域:
材料科学
·
电催化
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Xianglei Han,Zhi Wang,Jixiao Wang
The development of highly selective polyamide (PA) membranes is critical for improving the quality and efficiency of the reverse osmosis (RO) process. However, the preparation of highly selective RO membranes exhibits some limitations, such as low efficiency and complex preparation process. Herein, RO membranes with high selectivity were prepared by adding Tween 80, a nonionic surfactant , to an organic phase. The state of Tween 80 in the organic phase and its function in the interfacial polymerization process were thoroughly discussed based on the detailed characterization of the organic phase solution and membrane. Furthermore, the optimization of the Tween 80 concentration, organic phase temperature, organic solvent type, and heat treatment temperature enabled the preparation of a membrane with high rejection (99.61%), high water flux (40.28 L m −2 h −1 ), and high stability. Compared with the virgin membrane, the selectivity of the optimized membrane increased by 136% and its permeability decreased by only 23%. In summary, the nonionic surfactant Tween 80 reacted with trimesoyl chloride (TMC) in the developed membrane preparation method to produce a new product TW-TMC, exhibiting a dual role of a surfactant and a co-monomer in the interfacial polymerization process, thereby regulating the formation and stacking of PA molecules.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Yunhao Li,Shuhao Wang,Hengyu Li,Guodong Kang,Yang Sun,Haijun Yu,Yan Jin,Yiming Cao
The enhancement in selectivity of nanofiltration (NF) membranes is of great significance for extending the application areas and improving the process economy, especially for the separation of monovalent/divalent ions. The characteristics of moderately increased pore size, fewer nonselective defects and a more uniform structure are conducive to NF membrane exhibiting higher rejection of divalent ions but lower rejection of monovalent ions. Nonylphenol polyoxyethylene ether (NP-10) was introduced in interfacial polymerization process in this study to optimize the microstructure and surface properties of polyamide (PA) layer to manufacture highly selective NF membranes. The hydrophobic benzene ring and aliphatic chain in NP-10 could form a local space that restricted the interfacial polymerization reaction on the side of the oil phase, thereby appropriately increasing the pore size of the PA layer. It was advantageous to the permeation of water molecules and monovalent ions with a smaller radius. The long hydrophilic oxyethylene group as a guide could facilitate the uniform diffusion of the monomer to the water/hexane interface. NP-10 as an amphiphilic substance would form a self-assembled network at the water/hexane interface, which was expected to optimize the distribution of aqueous amine monomers at the phase interface . Meanwhile, introducing NP-10 can form a stable interface and reduce the interface disturbance, thus inhibiting the formation of non-selective macropores (or “defects”) in PA layer, which could improve the separation selectivity of monovalent/divalent ions. In addition, the hydrophilicity and electronegativity were also enhanced. The results showed that the MWCO of NF membrane increased from 210.1 Da (TFC-0) to 269.6 Da (TFC-0.25), and the average pore radius increased from 0.248 nm to 0.276 nm. The water flux of optimized membrane was doubled compared to the control membrane. Most important, the optimized exhibited higher rejection of divalent Na 2 SO 4 (from 98.07% to 99.43%), and meanwhile lower rejection of monovalent NaCl (from 54.07% to 27.52%). NaCl/Na 2 SO 4 separation factor reached up to 130.53, which was about four times of TFC-0 membrane.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2016
·
IF 3.698
Zhen Yang,Kexin Ren,Eric Guibal,Shuying Jia,Jiachun Shen,Xuntong Zhang,Weiben Yang
A flocculation method was used for the removal of trace nonylphenol (NP) from synthetic surface water containing natural organic matters (humic acid, HA) and suspended inorganic particles (kaolin). A polymeric flocculant (CMCND), with enhanced cationic property and unique switchable hydrophobic/hydrophilic characteristic, was specially designed for this application. CMCND showed a high efficiency for trace NP removal, turbidity and UV 254 abatements: under optimized conditions (pH: 4; T: 35 °C; dosage: 40 mg/L), the removal of NP reached up to 79%. By using dosage-pH flocculation diagrams and correlation analyses as tools, kaolin and HA were found to exert synergistic effects on NP removal, with the aid of CMCND; the synergistic effect of HA is higher due to π-π stacking. Zeta potential-dosage profiles clearly demonstrated charge neutralization predominated at pH 4, due to the strong cationic groups in the flocculant. Floc size monitoring displayed that the delayed phase transformation process (from hydrophilicity to hydrophobicity) of CMCND at 35 °C enhanced NP removal. In addition, spectral analyses clarified the interactions among CMCND, NP, kaolin and HA: charge attraction and hydrophobic interaction between CMCND and NP played the key roles. The findings are of significance for removing endocrine-disrupting chemicals in environmental remediation.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2018
·
IF 3.306
An Chen,Shao-Wei Li,Dian Jing,Jian-Hong Xu
Non-ionic surfactants are widely used in many industrial applications such as detergents, oil recovery, and mineral flotation techniques. Non-ionic surfactants readily adsorb onto the oil-water interface, although they cannot dissociate in solutions like ionic surfactants can. Nonetheless, the electrostatic double-layer (EDL) repulsive force between oil drops coated with the non-ionic surfactant can still provide stability against coalescence. In this work, the interaction forces between two tetradecane drops with diameter of 6.5 µm were measured in the presence of the non-ionic fluorocarbon-based surfactant FS-30 in various salt solutions using optical tweezers. The measured force curves were consistent with the presence of a surface charge, even though the surfactant was non-ionic in nature. The results clearly show that the EDL repulsive force is gradually screened with increasing salt concentration. It was also found that the EDL repulsive force was significantly screened in the divalent cation salt solutions (Ca 2+ , Ba 2+ ) in comparison to in the monovalent cation salt solutions (Na + ). In addition, the absolute value of the measured zeta potential ( − ξ ) of emulsified tetradecane drops gradually decreased with increasing FS-30 concentration. In all experimental processes, the emulsified tetradecane drops coated with FS-30 were stable against coalescence. These findings have significant implications for the stability of emulsions used in the food, cosmetic, and detergent industries.
研究领域:
化学工程
·
界面科学
·
胶体科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Yang Zhen,Zhuo Ning,Zhang Shaopeng,Dong Yayi,Zhang Xuntong,Shen Jiachun,Yang Weiben,Wang Yuping,Chen Jianqiang
A pH- and temperature-responsive magnetic adsorbent [poly(N-isopropylacrylamide) grafted chitosan/Fe3O4 composite particles, CN-MCP], was synthesized for the removal of the endocrine-disrupting chemical nonylphenol. According to the structural characteristics (changeable surface-charge and hydrophilic/hydrophobic properties) of the targeted contaminant, CN-MCP was designed owning special structure (pH- and temperature-responsiveness for the changeable surface-charge and adjustable hydrophilic/hydrophobic properties, respectively). Compared to chitosan magnetic composite particles without grafting modification (CS-MCP) and several other reported adsorbents, CN-MCP exhibited relatively high adsorption capacity for nonylphenol under corresponding optimal conditions (123 mg/g at pH 9 and 20 °C; 116 mg/g at pH 5 and 40 °C). Meanwhile, high selectivity of the novel adsorbent in selective adsorption of nonylphenol from bisolute solution of nonylphenol and phenol was found. Effects of grafting ratio of the grafted polymer branches and coexisting inorganic salts on the adsorption were systematically investigated. Moreover, CN-MCP demonstrated desired reusability during 20 times of adsorption–desorption recycling. The high adsorption capacity, high selectivity, and desired reusability aforementioned revealed the significant application potential of CN-MCP in the removal of NP. On the basis of the adsorption behaviors, isotherms equilibrium, thermodynamics and kinetics studies, and instrumental analyses including X-ray photoelectron spectroscopy, BET specific surface area, zeta potential, and static water contact angle measurements, distinct adsorption mechanisms were found under various conditions: charge attraction between CN-MCP and the contaminant, as well as binding between polymeric branches of CN-MCP and nonyls, contributed to the adsorption at pH 9 and 20 °C; whereas hydrophobic interaction between CN-MCP and nonylphenol played a dominant role at pH 5 and 40 °C. The current study provided a strategy for the structural design of adsorbents according to the features of targeted emerging contaminants, and the continuity of the work was discussed and proposed.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Chao Song,Tong Wang,Xiaohuan Sun,Yimin Hu,Lei Fan,Rong Guo
The lamellar liquid crystal (LLCS) system constructed by surfactant aggregation was demonstrated to exhibit superior tribological properties due to its unique lamellar structure and creep recovery properties. However, the lubrication performance of this kind of liquid crystal system was greatly hindered by its soft nature. Emerging as two-dimensional material, MXene has been promising candidate in tribology on account of its unique layer structure and versatile composition . Taking account of the above fact, herein, nonionic surfactant polyoxyethylene lauryl ether (Brij30), MXene (Ti 3 C 2 T x ), and H 2 O were employed to construct a triple-component composite LLCS system and the related tribological properties were systematically investigated. The results demonstrated that the lubrication performance of the liquid crystal system formed in the presence of Ti 3 C 2 T x was significantly improved compared with that of Brij30/H 2 O LLCS. The average friction coefficient of the composite LLCS system was in the range of 0.1155–0.1266, and the best lubrication performance was achieved when the Ti 3 C 2 T x content was kept as 6 mg/mL. MXene is also able to achieve good dispersion in liquid crystal systems. The enhanced lubrication performance of the composite LLCS system was mainly due to the synergistic effect of MXene nanosheets and LLCS. In addition, the iron oxides generated by the reaction during the friction process also promote lubrication. It is believed that the current work provides an alternative method for the development of MXene/LLCS-lubricating materials.
研究领域:
材料科学
·
摩擦学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）