SCIENCE OF THE TOTAL ENVIRONMENT
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2020
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IF 6.551
Jiehan Duan,Jie Han,Siu Gin Cheung,Richard Kong Yuen Chong,Chui-Man Lo,Fred Wang-Fat Lee,Steven Jing-Liang Xu,Yang Yang,Nora Fung-yee Tam,Hai-Chao Zhou
Microplastic pollution is common in marine and coastal ecosystems, especially in mangrove wetlands. However, factors affecting the distribution of microplastics, such as plants, have not been sufficiently studied. We investigated the effect of different plant species on the distribution of sediment microplastics in two Nature Reserves in South China, viz. Futian Mangrove and Mai Po Mangrove. In Futian Mangrove, the abundance of total microplastics among three monospecific mangrove stands dominated by Sonneratia caseolaris , Kandelia obovata , and Sonneratia apetala was similar. The abundance of microplastics in the mudflat was similar to that in the forest interior, except for the fact that more fiber was found in the mudflat than in the interior of Sonneratia apetala. This suggested that the dense pneumatophores at the fringe prevented fibers from entering the mangrove forest . The significant positive dependence (p < 0.05) between the density of Sonneratia pneumatophores and the abundance of fibers highlighted the importance of pneumatophores. The abundance of total microplastics, predominantly in the form of fibers, in sediments at the forest fringe (2835 ± 713 items/kg d.w. and 2070 ± 224 items/kg d.w. in Futian and Mai Po, respectively) was higher than that in the forest interior and mudflat. There was no difference between the two latter locations in both mangroves, which demonstrated the significance of the fringe effect. This paper reports for the first time that the spatial distribution of microplastics in mangrove sediments was affected by plant species, which provides useful information for environmental processes of microplastics in coastal wetlands.
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高影响因子
Journal of Materials Chemistry A
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2021
·Vol. 10
·期 6
·2907-2916
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IF 12.732
Qiyu Wang,Xiangqun Xu,Bo Hong,Maohui Bai,Jie Li,Zhian Zhang,Yanqing Lai
Quasi-solid-state lithium metal batteries hold great potential for use in next generation energy systems due to their high energy capacity and safety. However, these systems still suffer from incompatible interphases and limited cycling performance due to Li dendrite growth. Considering this, nonpolar triallyl cyanurate with a ring-centred –CN coupled structure with pentaerythritol tetraacrylate as a cross-linking agents was applied in the in situ synthesis of gel polymer electrolyte (GPE). The GPE displays high ionic conductivity (7.93 mS cm−1) at room temperature and high stability towards a Li metal anode. Furthermore, the micro-electric field created by triallyl cyanurate (TAC) after polymerization provides uniform adsorption sites for Li+ flow and induces even distribution, which ensures a long cycling life (700 cycles) with a capacity retention of 80.6% for a LiFePO4|GPE|Li battery at 1C. The design of the polymer skeleton provides new insights into solid-state battery optimization different from the intrinsic properties of the electrolyte. This polymeric electrolyte also allows for new opportunities to practically manufacture lithium metal batteries.
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International Journal of Nanomedicine
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2013
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IF 3.463
Yijun Wu,Jing Yao,Jianping Zhou,Fatima Zohra Dahmani
For nearly a decade, thermoresponsive ophthalmic in situ gels have been recognized as an interesting and promising ocular topical delivery vehicle for lipophilic drugs. In this study, a series of thermosensitive copolymers, hyaluronic acid-g-poly(N-isopropylacrylamide) (HA-g-PNIPAAm), was synthesized, by coupling carboxylic end-capped PNIPAAm to aminated hyaluronic acid through amide bond linkages, and was used as a potential carrier for the topical ocular administration of cyclosporine A (CyA). The lower critical solution temperature of HA-g-PNIPAAm59 in aqueous solutions was measured as 32.7°C, which was not significantly affected by the polymer concentration. Moreover, HA-g-PNIPAAm59 microgels showed a high drug loading efficiency (73.92%) and a controlled release profile that are necessary for biomedical application. Transmission electron microscopy (TEM) and atomic force microscopy (AFM) observations showed that HA-g-PNIPAAm microgels were spherical in shape with homogeneous size. Based on the result of the eye irritation test, the HA-g-PNIPAAm microgels formulation was shown to be safe and nonirritant for rabbit eyes. In addition, HA-g-PNIPAAm microgels achieved significantly higher CyA concentration levels in rabbit corneas (1455.8 ng/g of tissue) than both castor oil formulation and commercial CyA eye drops. Therefore, these newly described thermoresponsive HA-g-PNIPAAm microgels demonstrated attractive properties to serve as pharmaceutical delivery vehicles for a variety of ophthalmic applications.
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Desalination and Water Treatment
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2024
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IF 1
Zongbao Yao,Changhui Wang,Na Song,Chunliu Wang,Helong Jiang
Anoxic ferric iron-dependent ammonium oxidation (Feammox) is a novel biological nitrogen removal process that oxidizes ammonium to NO 2 – , NO 3 – or N 2 using ferric iron as the electron acceptor. In this study, the Feammox process was successfully developed in a biofilm reactor using sponge iron as a Fe source feeding ammonium-containing aerobic water. The results showed that NH 4 + was oxidized to NO 3 – by Feammox. During 300 d of operation, the bioreactor demonstrated an average NH 4 + oxidation efficiency and rate of 42.3% and 32.2 mg N L –1 d –1 , respectively. Sponge iron was oxidized to ferric by dissolved oxygen (DO) in the influent and provided ferric and anaerobic conditions for Feammox. Only a small proportion of the generated NO 3 – was reduced to N 2 by nitrate-dependent Fe(II) oxidation causing nitrogen removal in the Feammox biofilm reactor. A distinct inhibition of Feammox was observed when DO increase to 1.0 mg L –1 . Microbiological composition analysis of the Feammox biomass showed that the dominant iron-reducing bacteria were Geobacter spp., Fervidicella, and Geothrix, which may contribute to Feammox. This study provides information on the process development of Feammox.
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ACS Applied Materials & Interfaces
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2023
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IF 9.5
Qiang Shen,Dongyu Jiang,Shiyu Cao,Xinqi Lu,Chong Mao,Xiaobing Dai,Fei Chen
High Li+ conductivity, good interfacial compatibility, and nano-scale particle size have always been essential conditions for selecting inorganic fillers in high-performance composite solid electrolytes. In this study, non-milled in situ LLZO fillers with nanosize was synthesized via the sol–gel method by rapid heating sintering, which resulted in more surface defects and fewer impurities in LLZO. Compared with milled LLZO fillers, these non-milled LLZO fillers with more surface defects and fewer impurities can effectively reduce the crystallinity of PEO and agglomeration in PEO, which can form composite electrolytes with high Li+ conductivity. Most importantly, the discharge capacity of the 7.5% non-milled LLZO–PEO-based LiFePO4/Li battery is about 135.5 mA h g–1 at 1C and 60 °C. After 100 cycles, the discharge specific capacity remains at 99%. It is worth noting that nano-sized non-milled LLZO will improve the discharge capacity of LiFePO4/Li batteries to 122.1 mA h g–1 at 0.2C and 30 °C.
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INORGANIC CHEMISTRY
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2024
·
IF 4.3
Keke Hou,Chenjie Lou,Mingxue Tang,Hujun Cao,Laijun Liu,Jungu Xu
Ruddlesden–Popper (RP)-structured materials based on transition metals with a variable valence, such as Fe, Mn, Ni, and so on, have been well documented for their potential of being used as electrodes in solid-oxide fuel cells. However, RP materials with pure or dominant ionic conduction are rare. Here, a series of Zr-based RP materials Sr3Zr2–xMxO7–0.5x (M = Ga, Y, In) with electrical conductivity as high as 3.25 × 10–3 S cm–1 at 900 °C in air was reported, which represents the highest conductivity for the Zr-based RP materials and is comparable to that of the recently reported In-based RP oxide-ion conductors, such as NdBaInO4-based and La2BaIn2O7-based materials. Under low oxygen partial pressure (pO2), the doped samples show pure ionic conducting behaviors without n-type electronic conductivity. The defect formation energies, local structure around the oxygen vacancies, and oxide-ion-conducting mechanism of the acceptor-doped Sr3Zr2O7-based materials were studied for the first time. The results revealed a two-dimensional oxide ion migration characteristic within the perovskite slabs. This work therefore provides a good reference for developing new oxide-ion conductors in the Zr-based RP-structured materials.
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高影响因子
Energy Storage Materials
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2018
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IF 0
Long Chen,Li–Zhen Fan
Replacement of solid polymer electrolyte (SPE) to routine liquid electrolyte is highly desirable for high-energy-density lithium sulfur batteries due to its low volatility, high safety and the ability to suppress shuttle effect. Herein, a polymer-in-salt polysiloxane SPE was fabricated with bi-grafted polysiloxane copolymer , lithium bis(trifluoromethanesulfonyl)imide and poly(vinylidene fluoride), which shows higher ionic conductivity (7.8 × 10 -4 S cm -1 at 25 °C). To obtain the satisfactory ionic conductivity and high mechanical property of solid electrolyte simultaneously, cellulose acetate matrix was combined as a rigid substrate to prepare composite polymer electrolyte (CPE) that possesses high ionic conductivity (4.0 × 10 -4 S cm -1 ), enhanced mechanical strength (6.8 MPa), wide electrochemical stability window (4.7 V vs . Li + /Li), and high ion transference number (0.52) at ambient temperature. In addition, the CPE effectively inhibits the growth of lithium dendrites and diffusion of polysulfides . The assembled lithium sulfur battery with CPE exhibits good room-temperature cycling performance at 1C, which indicates that such polymer-in-salt polysiloxane based composite electrolyte membranes can be applied to ambient temperature all-solid-state lithium sulfur batteries .
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Journal of Materials Chemistry C
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2023
·Vol. 11
·期 17
·5846-5856
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IF 6.4
Shuangshuang Shi,Hao Lv,Yingchao Ge,Yingying Wang,Shu Xu,Chong Geng
A nanocomposite of perovskite nanocrystals (PNCs) with polymethyl methacrylate (PMMA) provides excellent color quality and processibility for application in wide color-gamut display devices. However, the agglomeration and fluorescent quenching of PNCs in PMMA impeded the development of high-performance PNCs–PMMA film. Here, we report the one-pot synthesis of CsPbBr3 PNCs in methyl methacrylate (MMA) that enables the direct fabrication of bright and durable PNC–PMMA films. The study of growth kinetics reveals that the weak polarity and low viscosity of MMA are important characteristics that promote rapid nucleation and ripening of PNCs at low temperatures. An amine-rich environment and an appropriate precursor concentration are also essential for controlling the isotropic growth and structure of the PNCs. The optimized method offers an attractive route for growing PNCs in a controlled manner, resulting in PNC–MMA with a high photoluminescence quantum yield of 85% and a narrow emission linewidth of 20 nm. An efficient PNC–PMMA thin film was fabricated by the UV-curing of the PNC–MMA solution and tested as a light-conversion layer in an LCD backlight module that showed largely improved optical performance and stability. This route provides a facile and green approach for the fabrication of high-quality PNC–PMMA nanocomposites that will have great potential for display backlighting and other optoelectronic applications.
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高影响因子
Journal of Materials Chemistry C
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2019
·Vol. 7
·期 44
·13811-13817
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IF 6.641
Tianhui Wang,Taizhong Xiao,Youzhun Fan,Fangyu He,Yongjin Li,Yuehong Peng,Qi Wang,Zhaoyi Yin,Zhengwen Yang,Jianbei Qiu,Zhiguo Song
A heating-induced monotonous increase in the Yb3+ excited state (2F5/2) lifetimes is found in Yb3+ single doped Bi7F11O5 nanocrystals, possibly due to the thermal-enhanced photocarrier separation in polarized layered semiconductors with spontaneous internal electric fields. This unique phenomenon is evaluated for its thermometric performance in terms of lifetime luminescence thermometry, and the maximum absolute/relative temperature sensitivity (Sa/Sr) reaches as high as 0.65 μs K−1/0.24% K−1 in biological temperature regions. The results of this work can offer great potential for lifetime luminescence thermometry in biological areas and provide ideas for designing efficient photonic and photoelectric thermal devices.
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高影响因子
Scientific Reports
·
2026
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IF 4.9
Liu Ying,Chen Ningning,Xie Zhengkun,Huo Tingting,Wang Weijia
Conventional cholesterol liposomes have poor stability, rapid clearance, and toxicity. This study used Rg3 to replace cholesterol for constructing curcumin-loaded liposomes (PCRL) and evaluated their potential for enhanced hepatocellular carcinoma therapy. Curcumin-loaded liposomes were prepared with Rg3 (PCRL) and cholesterol (PCCL) via thin-film hydration. Physicochemical properties, protein corona, in vitro behavior, in vivo tumor targeting, antitumor efficacy, and biosafety were assessed in H22 tumor-bearing mice. PCRL exhibited smaller particle size, superior storage/plasma stability, and comparable membrane packing to PCCL. Protein corona analysis showed reduced adsorption of immunoglobulin-like and complement proteins, prolonging blood circulation > 24 h and enhancing tumor accumulation. In vitro, PCRL showed good biocompatibility, reduced curcumin cytotoxicity, enhanced cellular uptake, and the slowest drug release. In vivo imaging demonstrated stronger and more persistent tumor fluorescence with lower liver/spleen retention. PCRL significantly inhibited tumor growth. Safety assessment revealed low hemolysis, no hepatorenal toxicity, normal spleen index, and good body weight tolerance. Curcumin-loaded liposomes with Rg3 substituting cholesterol maintain membrane integrity while prolonging circulation, improving tumor targeting/efficacy, and enhancing biosafety, offering a promising strategy for next-generation stealth liposomal delivery systems.
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高影响因子
ACS Sustainable Chemistry & Engineering
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2017
·
IF 5.951
Liang Qi,Guangyin Ji,Zhigang Luo,Zhigang Xiao,Qingyu Yang
In this work, an enhanced starch-dissolving room-temperature ionic liquid 1-hydroxypropyl-3-methylimidazolium acetate ([C3OHmim]Ac) was tailor-made to serve as the polar phase in the formation of [C3OHmim]Ac/TX-100 + 1-butanol/cyclohexane (IL/O) microemulsion. Its superior solubility to starch was verified by the polarized-light microscope and turbidity test. Furthermore, a pseudoternary phase diagram, conductivity measurement, and dynamic light scattering (DLS) were used to analyze the phase behavior and microregion of IL/O microemulsion. On this basis starch nanoparticles with a mean diameter of 86.69 nm were successfully prepared in this novel IL/O microemulsion with octenyl succinic anhydride (OSA) maize starch as the raw material and epichlorohydrin as a cross-linker through microemulsion cross-linking reaction. For starch nanoparticles, Fourier transform infrared spectroscopy (FTIR) data demonstrated the formation of ester bonds, and cross-linking reaction in starch molecules and X-ray diffraction (XRD) disclosed the destruction of the crystal structure. In addition, scanning electron microscopy (SEM) intuitively revealed that OSA-modified starch nanoparticles possessed good dispersibility, nanoscaled size, and a relatively concentrated size distribution. Finally, drug loading and releasing properties of starch nanoparticles were investigated with indomethacin as a drug model.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2026
·
IF 10.6
Hongmei Deng,Wenkang Peng,Haitao Sun,Haiyi Chen,Yu Liu,Zhiqiang Yu,Tangfu Xiao,Jun Luo
CFC-SBA was used as novel binding agent in the DGT configuration. • In situ monitoring Tl in AMD-impacted environments with CFC-SBA-DGT. • CFC-SBA-DGT analysis was independent of pH (2–12) and ionic strength (1–500 mmol L −1 ). • The proposed DGT is a robust tool for measuring Tl in groundwater and surface water. Thallium (Tl) contamination in groundwater and surface water poses serious ecological and human health risks. This study developed a diffusive gradients in thin-films (DGT) technique using a copper(II) ferrocyanide-functionalized mesoporous silica (CFC-SBA) binding gel for in situ measurement of DGT-labile Tl in acid mine drainage (AMD)-impacted waters. The CFC-SBA gel achieved near-quantitative elution with 5 mol L −1 HNO 3 and had a binding capacity of 48.2 μg cm −2 . Diffusion coefficients in agarose gel at 25 °C were 15.30 × 10 −6 cm 2 s −1 for Tl(I) and 8.01 × 10 −6 cm 2 s −1 for Tl(III). Laboratory tests supported Tl(I) measurement across pH 2–12 and Tl(III) measurement across pH 2–7. Performance was independent of ionic strength (1.0–500 mmol L −1 NaNO 3 ), and dissolved organic matter (0–30 mg L −1 humic acid). Method detection limits were 2.2 ng L −1 for Tl(I) and 3.2 ng L −1 for Tl(III), and the gel remained stable after 240 days of controlled storage. The method was further validated in quiescent solutions mimicking groundwater conditions. Field deployments at five AMD-impacted sites (24–72 h) demonstrated the feasibility of measuring DGT-labile Tl. Relative to TP-DGT, CFC-SBA-DGT showed an advantage under the strongly acidic and high-ionic-strength conditions tested, but the comparison does not demonstrate universal analytical superiority. Download: Download high-res image (225KB) Download: Download full-size image
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