CHEMOSPHERE
·
2023
·
IF 8.8
Langrun Song,Jun Nan,Bohan Liu,Fangmin Wu
Excessive phosphorus in water causes environmental security problems like eutrophication . Advanced two-dimensional material MXene has attracted raising attention in aquatic adsorption, while lack of selectivity and difficult recovery limit its application in phosphate removal . In this study, Ti 3 C 2 -MXene embedded zirconium-crosslinked SA (MX-ZrSA) beads were synthesized and their phosphate adsorption performance under different conditions was assessed. Investigations using SEM/EDS, XRD, BET, TGA and contact angle meter reveal that the addition of Ti 3 C 2 -MXene enhanced the thermal stability, mechanical strength, hydrophilicity, and formed loose network-like mesoporous inner structure with large surface area. The theoretical maximum adsorption capacity was 492.55 mg P/g and was well fitted by Freundlich and optimized Langmuir models. The Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analysis showed that chemisorption was involved, and the formation of Zr–O–P and Ti–O–P complexes accounted for high selectivity and affinity to phosphate. The adsorption experiments in real waters and lab-scale continuous flow Anaerobic-Anoxic-Oxic reactor further indicated the application potential of MX-ZrSA beads. Our study will provide insight into MXene and SA aerogel synergistic adsorption of aquatic contaminants and help with the removal and recovery of finite phosphorus resource.
研究领域:
环境科学
·
材料科学
·
水处理
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yunlai Zhang,Yan Zhang,Mengqi Jian,Ying Pei,Jie Liu,Xuejing Zheng,Keyong Tang
In this work, carboxymethylated curdlan (CMCD) was utilized as a capping and stabilizing agent for the green synthesis of silver nanoparticles. Subsequently, quaternized curdlan (QCD) was introduced as the second capping layer through electrostatic attraction, leading to the preparation of double-capped silver nanoparticles (AgNPs@CQ). The successful synthesis of silver nanoparticles was characterized using UV–vis, FTIR, XRD, TEM, and DLS. AgNPs@CQ were incorporated into gelatin and a AgNPs@CQ/Gel composite hydrogel was obtained. The incorporation of AgNPs@CQ imparts excellent antibacterial properties to the composite hydrogel, thereby enhancing its antimicrobial efficacy. The presence of double-capping layers significantly retards the release rate of silver, contributing to prolonged antimicrobial activity. The MTT and live/dead fluorescence staining results demonstrate that the gelatin hydrogel incorporating double-capped AgNPs exhibits enhanced cell viability compared to the one incorporating single-capped AgNPs. Additionally, the composite hydrogel exhibits remarkable mechanical strength and adhesive performance. The AgNPs@CQ/Gel composite hydrogel demonstrates a cost-effective and facile preparation, showing significant potential in the field of dressings.
研究领域:
材料科学
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纳米技术
·
生物医学工程
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science of Advanced Materials
·
2022
·Vol. 14
·期 10
·1589-1598
·
IF 1.067
Jin Hong,Wu Yali,Li Yanzhong
Adsorption method has attracted extensive attention in heavy metal wastewater treatment due to its low cost, abundant sources, and simple operation. Kaolin is utilized as raw material, waterborne polyurethane is utilized as dispersion medium, and dimethyl sulfoxide (DMSO) is utilized
as intercalation agent, to prepare intercalation polymerization modified kaolin material (KBEP). It is then characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), thermogravimetry (TG), and other methods. The polymer is utilized
for static adsorption of Cu2+ and Pb2+, and the kinetic analysis of the adsorption process is carried out. The results show that the layer spacing of kaolin increases substantially (from 0.69 nm to 0.81 nm) after modification. When the content of kaolin is less than 1.7%,
kaolin exists in intercalation or stripping state in waterborne polyurethane matrix. When the content of kaolin is higher than 1.7%, kaolin can exist in the form of agglomeration with waterborne polyurethane matrix. Compared with pure polyurethane, the composite’s thermal stability is
improved, and the maximum thermal weight loss of the hard section is increased by 50 °C. When kaolin content is 2.5%, the temperature of the hardness and the fastest thermal decomposition rate of the soft section increases by 30 °C and 26 °C, respectively. The adsorption test reveals
that the Cu2+ elimination rate reaches 93.7% when the addition amount of the prepared material reaches 1.5 g/L. When the addition amount of the prepared material reaches 0.6 g/L, the Pb2+ elimination rate reaches 95.8%. With the increase of the dosage of kaolin composite,
the adsorbability of the polymer to the two metal ions decreases gradually. Kinetic experiments show that the adsorption of Cu2+ and Pb2+ is in line with the pseudo-second-order kinetic (PSOK) equation. The adsorbability of Cu2+ and Pb2+ is 75.3
mg/g and 268.6 mg/g, respectively. The adsorption way is mainly chemical adsorption.
研究领域:
环境科学
·
材料科学
·
化学工程
·
废水处理
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 52
·期 1
·547-558
·
IF 2.047
Zhou Jian,Ren Sili
The phosphor-converted white light-emitting diode (WLED) has received tremendous attention as a promising alternative to traditional light sources in lighting and displays. Herein, a novel broadband red emitter Ca 2 Sr(PO 4 ) 2 :Mn 2+ was successfully designed and synthesized based on the Sr-alloying and Mn-doping of Ca 3 (PO 4 ) 2 . The phase purity of the materials was verified by x-ray diffraction (XRD) analyses, while a scanning electron microscope (SEM) coupled with an energy-dispersive spectrometer (EDS) was employed to confirm the uniform dopant distribution. XRD Rietveld refinements were further performed to clarify the site occupation of alloying Sr and the Mn dopants. Effective site engineering confined the Mn dopants in a highly symmetric Ca5 site and excluded the immersion of Sr, leading to an extraordinarily long fluorescence lifetime. Density functional theory (DFT) simulations also revealed the good potential of the materials as host matrices for activators such as Mn 2+ . Finally, Ca 2 Sr(PO 4 ) 2 :Mn 2+ was used to fabricate a WLED prototype based on a near-ultraviolet (n-UV) commercial LED chip, which realized a warm white-light emission and high color rendering index (Ra) of 82.9. This WLED was able to survive the long-term stability test while maintaining high luminous efficacy of ~ 60 lm/W within 20 h, showing its great potential in practical applications.
研究领域:
材料科学
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光电技术
·
照明技术
·
固体物理
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jiangxue An,Li Li,Yaping Ding,Weijuan Hu,Dingding Duan,Huan Lu,Daixin Ye,Xiaoli Zhu,Hongxia Chen
A novel electrochemical sensor based on molecularly imprinted polymer (MIP) and iron metal-organic frameworks was fabricated for highly sensitive detection of melamine (MEL) in this work. MIL-53(Fe), a kind of iron metal-organic frameworks, was prepared by a simple solvothermal method . The molecularly imprinted polymer films with specific recognition sites were synthesized by electropolymerization using methacrylic acid (MAA) as functional monomers interacted with MEL as templates. MIL-53(Fe) was characterized by XRD and FT-IR. The morphology of the MIP modified electrode was characterized by scanning electron microscopy. Under the optimal conditions, the molecularly imprinted electrochemical sensor (MIECS) shows a wide linear range of 10 −11 M to 10 −6 M for MEL with a detection limit (3σ) as low as 8.21 × 10 −12 M. Moreover, the MIP sensor shows high selectivity for melamine, good reproducibility and stability. The MIECS has been applied to the real detection of melamine in liquid milk samples with satisfying results.
研究领域:
分析化学
·
材料科学
·
电化学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 4
·2040-2046
·
IF 3.361
Yang Liu,Xin Liang,Jie Zhang,Jimmy Yun,Zuobo Yang
In this study, monodispersed NiRu nanocrystals with a diameter of 3 nm were synthesized at 90 °C via a tuning hot-inject method to lower the temperature of the organic phase synthesis of monodispersed nanomaterials. The key factor for the nanocrystalline formation of NiRu alloy nanocrystals was summarized in detail. Simultaneously, the synergistic effect of Ni and Ru in CO2 methanation was explored. Doping trace Ru can significantly improve the conversion rate of CO2 methanation and CH4 selectivity. The underlying mechanism was studied in detail via X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), temperature-programmed hydrogen reduction (H2-TPR) and desorption (H2-TPD) tests, and temperature-programmed desorption of CO2 (CO2-TPD). This study gives out a new way for the general synthesis of monodisperse nickel-based nanocrystals and provides a reference for the development and application of monodispersed nanoparticles for CO2 methanation.
研究领域:
材料科学
·
催化
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2015
·
IF 6.196
Hao Wu,Wenyuan Yi,Zhe Chen,Haitao Wang,Qiangguo Du
Janus graphene oxide (GO) nanosheets functionalized by amino-containing chemicals were prepared via Pickering emulsion template. A wax-in-water Pickering emulsion was used to mask one side of GO nanosheets in order to achieve asymmetric chemical functionalization. Janus particles were obtained by removing the oil phase. The successful reaction of epoxy groups on the surface of GO with amino-containing chemicals was confirmed by Fourier transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA). The asymmetric surface structure of Janus GO nanosheets was detected by atomic force microscope (AFM) and X-ray diffraction (XRD). The efficient stabilization of an oil-in-water Pickering emulsion by Janus GO was proved. Polymer microspheres fabricated by using Janus GO as Pickering stabilizer had a more hydrophilic surface compared with those stabilized by symmetrically modified GO.
研究领域:
材料科学
·
化学
·
纳米技术
·
胶体科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 26
·期 1
·215-226
·
IF 2.8
Zhang Juan,Khan Muhammad Asim,Xia Mingzhu,Abdo Abdelnasir Mahmoud,Lei Wu,Liao Chuan,Wang Fengyun
A highly resourceful, eco-friendly, and recyclable magnetic adsorbent based on montmorillonite (CoFe 2 O 4 /MMT) was fabricated via a facile hydrothermal method to harvest tetracycline (TC) and ciprofloxacin (CIP) from pollutant water. The prepared adsorbent was characterized by XRD, FT-IR, SEM, and VSM methods to comprehend its structure, morphology, and magnetism. Effects of experimental parameters including solution pH, adsorption time, initial concentration, and ion strength were studied in details. The experimental adsorption data of TC and CIP fitted into pseudo-second-order kinetic model and Langmuir isotherm, respectively. The maximum adsorptions of TC and CIP could reach up to 240.91 and 224.00 mg/g. The thermodynamic study indicates that the adsorption process is spontaneous. In addition, the antibiotics can be further degraded under visible light environment and the magnetic sorbent can also be thermally regenerated.
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研究领域:
环境科学
·
材料科学
·
化学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Minjie Xu,Xianglin Liu,Guiyao Song,Yingying Cai,Bianfang Shi,Yitao Liu,Xiaoxu Ding,Zixu Yang,Pengfei Tian,Chenxi Cao,Jing Xu
Different iron species exhibit distinct activity and selectivity in CO 2 hydrogenation reaction. Herein, by controlling calcination temperature, Fe-Al interaction in Na promoted Fe-Al catalysts has been regulated, which further leads to various compositions of iron oxide (FeO x ) and iron carbides (Fe 7 C 3 and Fe 5 C 2 ) after CO activation and CO 2 hydrogenation reaction. The phase compositions and structures of Fe-Al catalysts are carefully distinguished by multiple characterizations, including XRD, XPS, MES and TEM, and the reactivity of different phases is studied with the combination of experiments (kinetics, TP and in situ DRIFTS) and Density Functional Theory (DFT) calculations. Our FeAl350 with the highest FeC x content shows the highest CO 2 conversion of 48.2% and the lowest CO selectivity of 10.1%, and FeAl900 with the highest Fe 5 C 2 / FeC x ratio presents the highest C 5+ selectivity of 44.6%. Finally, a correlation between different compositions of iron species with the activity and selectivity of Fe-based for CO 2 hydrogenation to olefins was established.
研究领域:
催化
·
化学工程
·
材料科学
·
环境化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Yuping Li,Ping Xiang,Haotian Chen,Yuan Zhou
The discharge of dye wastewater threatens the ecology and biological health. Adsorption technology is the preferred treatment method and absorbent is core. In this study, a high-performance ZIF-8@ZIF-67 adsorbent was synthesized by epitaxial growth . XRD and TEM demonstrated the successful synthesis of the core-shell ZIF-8@ZIF-67 and BET showed that the specific surface area, pore volume and diameter of ZIF-8@ZIF-67 were 1518.75 m 2 /g, 0.65 cm 3 /g and 1.71 nm, respectively, with microporous being the predominant. The optimum adsorption conditions for the adsorption of Direct Blue-86 by ZIF-8@ZIF-67 were an initial concentration of 150 mg/g, a ZIF-8@ZIF-67 dosage of 5 mg, and a pH of 8, and the adsorption capacity at this condition was 301.69 mg/g. The mechanism of adsorption on Direct Blue-86 has been speculated to be electrostatic interaction , hydrogen bonding , Lewis acid-base interaction, π-π stacking and coordination. The kinetics of adsorption of Reactive Yellow and Congo Red in the two-component system were both consistent with the pseudo-second-order kinetic models , with chemisorption being the rate-controlling step and the adsorption rates of Reactive Yellow and Congo Red were both higher than that of one-component system. Meanwhile, they were more consistent with the Langmuir monolayer adsorption models, with maximum adsorption capacities of 261.10 mg/g and 291.55 mg/g, respectively, a decrease of 56.66% and 54.52% compared to that in the one-component system.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shoulu Yang,Zhongwei Wang,Zhu Liu,Yiqiang Wu
In this work, we present a simple and effective approach to enhance the fire safety and anti-corrosion performance of wood by forming in-situ self-assembled amphiphilic Ag-PW nanospheres (NSP) at room temperature. The morphology and acid capacity of the NSP were optimized by changing the ratio of phosphotungstic acid (HPW) and silver nitrate. The Ag-PW NSP were successfully integrated into the bulk of the wood, resulting in a durable treatment with minimal leaching. Comprehensive characterization techniques, including FTIR, XPS, XRD, SEM, TEM, and nitrogen adsorption–desorption analysis, confirmed the in-situ formation of Ag-PW NSP in the wood. The treatment exhibited low-leaching properties with only 5.89% of Ag-PW1a leaching out. The treated wood demonstrated excellent flame-retardant (FR) properties, as evidenced by a limiting oxygen index value > 28% and easy passage of the UL-94 test, with the formation of a high-density char layer. The flammable pyrolysis products released during combustion were found to be significantly altered, with a change in the depolymerization route of conversion of LGO under acid conditions to HMF, which was verified by DFT calculations. The treated wood also exhibited outstanding anti-corrosion properties, with a mass loss rate of less than 1%, compared to at least 32.3% for bare wood after the anti-white or brown-rot fungus tests. Moreover, the treated wood samples maintained their excellent FR properties even after leaching. Our study provides valuable insights for the rational design of nano-material additives for wood protection, thereby improving the usage of wood resources while mitigating health and environmental hazards.
研究领域:
材料科学
·
化学
·
木材科学与技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 16
·13730-13745
·
IF 2.22
Gao Rongli,Qin Xiaofeng,Duan Honglin,Wu Heng,Xu Ruicheng,Zhang Qianwei,Zhang Shilong,Li Zhengdong
0.8BaTiO 3 -0.2BiAlO 3 /Co 0.8 Cu 0.2 Fe 2 O 4 composite ceramics with a molar ratio of 6:1 were prepared by hydrothermal method combined with solid-state method, and effects of the sintered temperature and time on the microstructure, dielectric, ferroelectric, and magnetic properties were investigated. XRD result indicates that the composite ceramics show bi-phase structure, and the secondary phase is indexed as Ba 3 Fe 32 O 51 , and proves that we can change the sintered temperature and sintered time to adjust the crystallinity of the composite ceramics and the concentration of impurities. The surface is relatively uniform except for few pores, and the grain size of ferromagnetic phase increases as the function of temperature and time. The dielectric dispersion of composite ceramics is obtained, and the character comes from inhomogeneous structure and Maxwell–Wagner type interfacial polarization. The two peaks of dielectric constant are obtained, and the composite ceramics (1200 °C/4 h) show high dielectric constant and loss due to the interface effect, and this result is confirmed by the AC conductively. The relaxation result is different from the ferroelectric phase, and this may be caused by the thermally activated, the grain size of ferroelectric phase, impurity phase, pore, and defect of composite ceramics. The ferromagnetic result refers that the sintered temperature has obvious influence on the coercive force by the grain size and magnetic anisotropy.
研究领域:
材料科学
·
陶瓷
·
电气工程
·
物理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）