JOURNAL OF HAZARDOUS MATERIALS
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2025
·
IF 11.3
Xia Li,Jie Song,Yanji Jiang,Huimin Sun,Xianqiang Yin
Aniline compounds (ACs) and microplastics (MPs) are emerging contaminants that frequently co-occur in industrial wastewater and soil-groundwater systems. However, their co-transport mechanisms and in particular the role of MPs as carriers to enhance ACs transport remain unclear. This study employs adsorption and column experiments to systematically analyze the adsorption characteristics and mechanisms of polyacrylonitrile microplastics (PANMPs) for aniline and p-chloroaniline. It also examines the effects of key parameters, such as flow rates, pH, and IS, on the transport behavior of ACs in the presence of MPs, thereby offering new insights into their environmental fate. The adsorption experiments revealed that the adsorption of MPs onto ACs follows a multilayer physical adsorption mechanism, with enhanced adsorption capacity observed at lower pH and higher ionic strength (IS). Column transport experiments demonstrated that PANMPs significantly promote ACs migration. Notably, pH and IS modulated the co-transport behavior by altering the adsorption affinity between MPs and ACs, thereby enhancing the disparity in their transport behavior. Furthermore, the greater mobility of PANMPs with increasing flow rates led to a greater extent of ACs transport in the sand column. These findings are of great significance for understanding the transport behavior and fate of MPs and ACs in soil-groundwater.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2025
·
IF 6.3
Yulong Luo,Pan Chen,Hanyu Jin,Shiyi Zhao,Zhenzhen Huang
Background The presence of antibiotics like tetracycline (TC) in aquatic environments poses serious risks to ecosystems and public health, primarily by contributing to antibiotic resistance. As a response to this challenge, biochar-based adsorbents have gained attention for their sustainability and efficiency. Methods This study introduces sulfur and nitrogen co-doped modified sludge biochar (NSBC), synthesized using thiourea, urea, and ammonium bisulfate, as a novel adsorbent for TC removal. Its performance was compared to unmodified sludge biochar (SBC), sulfur-doped (SSBC), and nitrogen-doped (NBC) variants. NSBC showed superior adsorption capacity (83.01 mg/g) and removal efficiency (83.01 %). Key parameters—temperature, dosage, and pH—were optimized, with pH 5 and elevated temperature yielding the best results. Adsorption followed a pseudo-second-order kinetic model and fit best with the Freundlich and Sips isotherms, indicating chemisorption on a heterogeneous surface. Significant Findings NSBC demonstrated enhanced affinity for TC due to its surface characteristics, confirmed by electrostatic potential and HOMO-LUMO analyses, which showed active electron-donating and accepting regions. These findings highlight NSBC as a promising, low-cost, and sustainable option for antibiotic removal in water treatment, offering a viable solution to mitigate pharmaceutical pollution in aquatic systems.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Lu Wen,Chaojie Li,Houqun Xiao,Huazhou Hu,Chaobin Lai,Luocai Yi,Qingjun Chen
The ZrCo alloy stands out as one of the most promising candidates for hydrogen isotope storage materials in nuclear fusion, owing to its extremely low equilibrium hydrogen pressure (10 −3 Pa, 20 ℃). However, ZrCo experiences severe disproportionation reactions during dehydrogenation/hydrogenation processes, which lead to significant performance degradation. To address this, we have introduced V and Ti into the ZrCo alloy, resulting in the Zr 0.8 V x Ti 0.2-x Co (x = 0–0.15) series. Our research indicates that the addition of V and Ti reduces the lattice parameters, thereby increasing the platform pressure for hydrogen desorption and decreasing the enthalpy and entropy of the desorption reaction. This modification allows for a lower desorption temperature and enhances the alloy's resistance to hydrogen-induced degradation. Remarkably, the hydrogen storage capacity of the Zr 0.8 V x Ti 0.2-x Co(x = 0–0.15) alloys remains stable after 19 h of desorption. Furthermore, the Zr 0.8 V 0.05 Ti 0.15 Co alloy demonstrates exceptional cycling stability, retaining over 99 % of its hydrogen storage capacity after 50 cycles. First-principles calculations have clarified the adsorption energies of hydrogen at different binding sites, revealing the following order of stability: E b(Ti-V) < E b(Zr-Ti) < E b(V-Zr) < E b(Zr-Zr) . The hydrogen absorption and desorption kinetics of the Zr 0.8 V x Ti 0.2-x Co alloys follow the trend: Zr 0.8 V 0.15 Ti 0.05 Co > Zr 0.8 V 0.1 Ti 0.1 Co > Zr 0.8 V 0.05 Ti 0.15 Co > ZrCo, indicating optimized performance with the introduction of V and Ti. This study not only provides a viable solution to the disproportionation issue in ZrCo alloys but also offers valuable insights into the design of high-performance hydrogen isotope storage materials for nuclear fusion applications.
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Energy & Environmental Materials
·
2024
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IF 13
Shuai Cao,Wenzhuo Wu,Chaozhong Liu,Leqian Song,Qun Xu,Huacheng Zhang,Yanli Zhao
The development of active water oxidation catalysts for water splitting has stimulated considerable interest. Herein, the design and building of single atom Co sites using a supramolecular tailoring strategy are reported, that is, the introduction of pillar[4]arene[1]quinone (P4A1Q) permits mononuclear Co species stereoelectronically assembled on MoS 2 matrix to construct an atomically dispersed MoS 2 @Co catalyst with modulated local electronic structure, definite chemical environment and enhanced oxygen evolution reaction performance. Theoretical calculations indicate that immsobilized single-Co sites exhibit an optimized adsorption capability of oxygen-containing intermediates, endowing the catalyst an excellent electrocatalytic oxygen evolution reaction activity, with a low overpotential of 370 mV at 10 mA cm −2 and a small Tafel slope of 90 mV dec −1 . The extendable potential of this strategy to other electrocatalysts such as MoS 2 @Ni and MoS 2 @Zn, and other applications such as the hydrogen evolution reaction was also demonstrated. This study affords new insights into the rational design of single metal atom systems with enhanced electrocatalytic performance.
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BIOMATERIALS
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2024
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IF 12.8
Xinyuan Yang,Weimin Nie,Chong Wang,Zhonglin Fang,Luoran Shang
Probiotic-based therapies have shown great potential in the prevention and treatment of many diseases by positively regulating intestinal flora homeostasis. However, the efficacy of oral probiotics is severely limited due to the loss of bioactivity, short intestinal retention time, and insufficient therapeutic effect. Here, based on droplet microfluidics, we developed a hydrogel microsphere with colonic targeting and mucoadhesive capabilities as a multifunctional delivery platform, which can be used for co-delivery of probiotics ( Escherichia coli Nissle 1917, EcN) and auxiliary molecules (indole-3-propionic acid, IPA), achieving synergistic therapeutic effects. In vivo studies shown that the integrated multifunctional microspheres can significantly reduce intestinal inflammation, repair intestinal barrier function, enhance probiotic colonization in the intestine, and modulate disordered intestinal flora, demonstrating enhanced therapeutic effects in a mouse model of colitis. This work reveals that microfluidic-based smart droplet microspheres can provide a versatile platform for advanced microbial therapies.
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ACS Applied Materials & Interfaces
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2019
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IF 8.456
Guoxiong Dai,Qingyi Xie,Chunfeng Ma,Guangzhao Zhang
Polymer resins are critical for marine anti-biofouling coatings. In this study, degradable poly(ester-co-acrylate) with antifoulant pendant groups has been prepared by the radical ring-opening polymerization of 2-methylene-1,3-dioxepane, methyl methacrylate, and N-methacryloyloxy methyl benzoisothiazolinone. Such a polymer containing main-chain esters can hydrolytically and enzymatically degrade. Both degradation rates increase with main-chain ester content. Moreover, since the antifoulant groups are chemically grafted to the degradable main chain, their release can be controlled by the degradation besides the hydrolysis of side groups. Our study shows that the copolymer coating is efficient in inhibiting the accumulation of marine bacterial biofilm of Pseudomonas sp. and diatom Navicular incerta. Marine field test reveals that the copolymer has excellent efficiency in preventing biofouling for more than 6 months.
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SURFACE ENGINEERING
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2020
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IF 2.433
Zhen He,Di Cao,Fangcheng Cao,Shengping Zhang,Yuxin Wang
The effects of heat treatment on the properties of electrodeposited Co–P–TiO2 nanocomposite coatings were systematically investigated. The TiO2 nanoparticles-reinforced Co–P–TiO2 nanocomposites were heat-treated at different temperatures. Thermal analysis was conducted to characterize the structural transitions. The phase constituents and surface morphology of nanocomposites were identified. The mechanical properties including microhardness and wear tests were examined, and the electrochemical behaviour of Co–P–TiO2 was determined. At the increasing heating temperature, the structure of Co–P–TiO2 was gradually changed from amorphous into crystalline, with its surface morphology being smoother. Proper heat treatment can significantly improve the mechanical properties and corrosion resistance of coatings. When Co–P–TiO2 coating was heat-treated at 350°C, a smooth and flat surface morphology was obtained and optimal physicochemical performance among the examined coatings was achieved.
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FUEL
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2020
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IF 5.578
Jing Gu,Honggang Fan,Yazhuo Wang,Yuyuan Zhang,Haoran Yuan,Yong Chen
The thermal weight-loss characteristics and product distribution of the co-pyrolysis between xylan from corn cob (XC) and high-density polyethylene (HP) were investigated by thermogravimetry coupled with fourier transform infrared spectroscopy and mass spectrometry (TG-FTIR-MS) and pyrolysis gas chromatography/mass spectroscopy (Py-GC/MS). Moreover, the synergistic effects in the co-pyrolysis process were explored. The co-pyrolysis of XC and HP occurs in two stages. The first stage (220–350 °C) was the decomposition of XC, and the second stage (440–525 °C) was mainly attributed to the decomposition of HP. Co-pyrolysis caused the blends to decompose more easily. The synergistic effect was confirmed during the co-pyrolysis process. The co-pyrolysis process promoted the release of hydrocarbons (CH 4 , C 2 H 2 , C 2 H 6 , C 3 H 6 , and C 3 H 8 ) and aldehyde derivatives (CH 3 CHO and CHO + ) and decreased the production of H 2 and H 2 O. Moreover, co-pyrolysis suppressed the generation of CO 2 only when the content of HP was 75%. The Py-GC/MS results showed that the yield of oxygen-containing compounds decreased, and the yield of alkenes and alkanes increased. The increase in alkenes was greatest when the ratio of XC to HP was 1:3. This phenomenon could be attributed to the release of hydrogen radicals from mono-molecular and bi-molecular dehydrogenation reactions during the decomposition of HP. Thus, HP could be a hydrogen donor, providing hydrogen for xylan-derived oxygenates, which served as acceptors. A reaction mechanism for the co-pyrolysis of XC and HP was also proposed.
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CERAMICS INTERNATIONAL
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2023
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IF 5.2
Haiyan Wang,Renzhong Xue,Xiang Zhu,Mengxin Ning,Haidan Liu
Improving energy storage density and efficiency of antiferroelectric materials could promote their use within energy storage field, particularly in the context of pulsed power sources. In this study, Sm and Hf co-doped silver niobate (AgNbO 3 ; AN) ceramics were prepared using traditional solid-state method. Comprehensive analysis of crystal structure, microstructure, defects, absorbance, and energy storage performance of the material was conducted. Results reveal that co-doping increased the concentration of cation vacancies and band gap, decreased the M 1 –M 2 and M 2 –M 3 phase transition temperatures, and enhanced the antiferroelectric phase stability and energy storage performance. The (Ag 0.955 Sm 0.015 )(Nb 0.95 Hf 0.05 )O 3 ceramic exhibited energy storage density of 5.35 J/cm 3 and energy storage efficiency of 73% at electric field ( E ) of 295 kV/cm, demonstrating significant improvement. The (Ag 0.955 Sm 0.015 )(Nb 0.95 Hf 0.05 )O 3 ceramic exhibited excellent thermal stability (<5% in the range of 25 °C-125 °C) and frequency stability (<3% in the range of 1–100 Hz under E = 290 kV/cm). Additionally, the (Ag 0.955 Sm 0.015 )(Nb 0.95 Hf 0.05 )O 3 ceramic exhibited ultrahigh discharge speed (∼18 μs) and high discharge energy density (4.9 J/cm 3 ). These advantages make these ceramics promising materials for energy storage applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
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IF 5.091
Mingsheng Luo,Shun Xu,Qingyang Gu,Zuoxing Di,Qinglong Liu,Zhijun Zhao
Layered double hydroxides (LDHs) were innovatively employed in this study as catalyst for synthesis gas conversion to chemicals, such as oxygenates. Cobalt-aluminium layered double hydroxides (Co-Al LDHs) was prepared at different temperatures. and lactate was successfully intercalated into the LDHs by ion-exchange method and then the material was further delaminated in water at ambient temperature. The samples were characterized by SEM, TEM and AFM, and separately dispersed nanosheets can be clearly observed. The prepared lamellas were applied in aqueous-phase synthesis gas conversion reaction. The catalysts generated a superior activity of 0.055–0.675 mol CO · mol Co - 1 · h - 1 and greater oxygenated product (acetaldehyde) selectivity (S Oxy = 75–88%) than conventional cobalt Fisher-Tropsch (FT) synthesis catalysts. Ammonium ion showed some effect of the selectivity of the acetaldehyde. The original research results suggested a promising application of the mono-dispersed ultrathin cobalt-bearing LDHs nanosheets in the aqueous phase syngas conversion to valuable oxygenate products.
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Journal of Materials Chemistry A
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2015
·Vol. 3
·期 19
·10353-10359
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IF 7.443
Mengzhu Li,Yuxia Pan,Xiaoyu Guo,Yinhua Liang,Yiping Wu,Ying Wen,Haifeng Yang
ssDNA was employed to readily disperse reduced graphene oxide (RGO) to form ssDNA–RGO composites, which could be used as a superior support to expediently electrodeposit Pt to synthesize ssDNA–RGO/cotton-flower-like-Pt nanocomposites (ssDNA–RGO/cf-Pt). The formation of cotton-flower-like-Pt clusters was due to the assistance of nitrogen atoms and phosphate groups in ssDNA. The catalytic activity of the ssDNA–RGO/cf-Pt nanocomposite for methanol oxidation was 2.5 fold of RGO/Pt and 3.8 fold of commercial Pt NPs. The outstanding catalytic activity of this novel catalyst was attributed to the very large surface of the highly conductive ssDNA–RGO and cotton-flower-like-Pt clusters with an open structure. The latter was beneficial for mass transfer. In addition, the excellent ability of the ssDNA–RGO/cf-Pt nanocomposite against CO poisoning was found and the anti-poisoning ratio (If/Ib) of ssDNA–RGO/cf-Pt was 1.75 fold larger than those of RGO/Pt and commercial Pt NPs. The elevated oxidation of CO in the adsorption state may be due to ssDNA providing abundant oxygen groups as well as the residual oxygen species in the RGO. A possible mechanism for the improved catalytic activity and CO tolerance was deduced according to UV-visible, Raman, scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV) results.
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Nanoscale
·
2021
·Vol. 13
·期 30
·13065-13071
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IF 7.79
Kun Wang,Yongyuan Hu,Jian Pei,Fengyang Jing,Zhongzheng Qin,Huabin Kong,Jinli Wang,Yumin Zhou,Gang Chen
High-capacity Co2VO4 has become a potential anode material for lithium-ion batteries (LIBs), benefiting from its lower output voltage during cycling than other cobalt vanadates. However, the application of this new conversion-type electrode is still hampered by its inherent large volume variation and poor kinetics. Here, a 2D–2D heterostructure building strategy has been developed to enhance the electrode performance of Co2VO4 through construction of Co/Co2VO4 nanocomposites converted from the in situ phase separation of Co2V2O7·3.3H2O nanosheets. Co/Co2VO4 based on face-to-face contact exhibits the optimized stacking configuration, where Co nanocrystals give gaps of several nanometers between stacked Co2VO4 nanosheets, enabling full contact with the electrolyte, a shorter transport path of lithium ions and more reactive sites. With this design, Co/Co2VO4 anodes deliver outstanding reversible capacity (750 mA h g−1 at 1 A g−1) with ultrahigh capacity retention rate, and excellent cycle stability at high rate (520 mA h g−1 at 5 A g−1 retained after 400 cycles). An “active center's charge transfer—capacity compensation” model was proposed based on capacity analysis, XPS depth analysis and HRTEM observation to uncover the fundamental reason of the excellent cycle performance. This in situ 2D–2D heterostructure constructing strategy may open up the possibility for designing high-performance LIBs.
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