JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Boqiang Gao,Qianqian Chang,Zhonghua Xi,Mayyada M.H. El-Sayed,Tamer Shoeib,Hu Yang
In this study, two environmentally-friendly macroscopically formal (PVF) composited sponges (PL and PLS) functionalized with lignin and lignosulfonate, respectively, were fabricated by a one-step mechanical foaming method. PLS, obtained with the fed mass ratio of 0.3:1 lignosulfonate to PVF in the preparation process, possessed a large specific surface area of approximately 22.396 m 2 /g, a three-dimensional skeleton structure with a skeletal density of 3.236 g/cm 3 , and 0.338 mmol/g of acidic oxygen-containing groups. Thus, it showed a high adsorption capacity of 0.16–0.24 mmol/g in removing seven antibiotics, of the popular fluoroquinolones (FQs) family from water. The contributions of hydrogen bonding, electrostatic attraction (EA) and π-π electron donor-acceptor interaction to the adsorption of FQs onto the PL and PLS sponges were analyzed systematically by investigating the pH dependence of the adsorption capacity, and the changes in adsorption of two sub structural analogs of FQs as molecular probes, and by performing theoretical calculations. The EA between the acidic oxygen-containing groups on the sponges and the amino groups of FQs played a dominant role in adsorption in near neutral conditions, leading to a superior adsorption performance for PLS. Overall, the composited sponges have the advantages of simple production, environmental-friendliness, convenient recycle, and low cost, which renders them potentially viable in treating real wastewater containing FQs.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xiaoqing Liu,Guangshe Li,Dan Zhang,Lingshen Meng,Baoyun Li,Liping Li
Li 3 VO 4 is one of the most promising candidates for high performance lithium-ion batteries due to its high specific capacity and excellent ionic conductivity , while its practical applications are hindered, because of its inferior rate capability. Herein, we adopted an anionic doping strategy to improve electronic conductivity, cycling stability and accelerate electrochemical kinetics. A series of F − doped Li 3 VO 4 samples were synthesized by a modified sol-gel method for the first time. F − doping led to the appearance of oxygen vacancies and reduced band gap, which effectively improve electronic conductivity. Complete structural rearrangement and optimized SEI layers also occurred during cycling, beneficial for stable lifetime. As a consequence, long cycle life (cycling 1100 loops at 500 mA g −1 except for the first 5 loops at 100 mA g −1 ) and optimized rate capability (255 mA h g −1 at 1000 mA g −1 ) were achieved for 5 at% F doping, which are superior to those for undoped samples. This work demonstrates that anion doping is a feasible strategy to accelerate electrons/ions transfer and improve cycling stability of Li 3 VO 4 .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 49
·38810-38817
·
IF 3.84
Yeping Li,Jingbo Xu,Yun Xu,Liying Huang,Junli Wang,Xiaonong Cheng
The objective of the study is to describe a new approach of combining quantum dots into chitosan as an anti-cancer drug carrier. Novel chitosan–ZnSe/ZnS (CS–ZnSe/ZnS) nanoparticles were synthesized by a one-step ionic gelation technique, with ZnSe/ZnS quantum dots (ZnSe/ZnS QDs) as cross-linking agent and for fluorescent labeling. The approach not only avoids the use of emulsifiers and chemical cross-linking agents but also prevents the possibility of damage to drugs. The fluorescent CS–ZnSe/ZnS nanoparticles were about 100–500 nm in size and stable in a physiological environment. Low cytotoxicity was ensured by investigation with mouse lung carcinoma cells. The cell viability remained 99% when the concentration of CS–ZnSe/ZnS nanoparticles increased to 200 μg mL−1. In the in vitro drug release experiment, 5-fluorouracil (5-Fu) loaded within CS–ZnSe/ZnS nanoparticles had more preferable sustained-release performance and longer equilibrium time compared with that of the pure 5-Fu. The fluorescent CS–ZnSe/ZnS nanoparticles are expected to be used for biological fluorescent labeling and drug carriers.
研究领域:
生物材料学
·
纳米医学
·
药剂学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 90
·48931-48937
·
IF 3.708
Jianhua Qiu,Xuyang Zhou,Qianqian Mo,Fang Liu,Liping Jiang
Polymer brushes have been used as supports for the immobilization of Keggin-type polyoxometalates (POMs) catalysts on poly(vinylidene fluoride) (PVDF) membranes by electrostatic-assembly. The poly(4-vinylpyridine) (P4VP) polymers are effectively grafted from PVDF membranes via surface-initiated atom transfer radical polymerization with activators generated by electron transfer (SI-AGET ATRP), and the P4VP-grafted PVDF membranes are characterized via ATR-FTIR, XPS, SEM, and AFM. Subsequently, the quaternization of the P4VP brushes process creates a membrane with a positive charge. The pendant pyridine and pyridinium groups facilitate the electrostatic assembly of POMs onto the P4VP-grafted membrane, thereby fabricating a well-designed membrane with potential catalytic applications. Therefore, such systems are interesting candidates for the heterogenization of POMs onto polymer-grafted membranes.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Coatings
·
2021
·Vol. 11
·期 6
·663
·
IF 2.881
Xiaoye Huang,Ruobing Yu
Superhydrophobic surfaces possess low mechanical strength, and can be easily contaminated by fluids with low surface tension, such as oil; this hinders their practical applications. In this study, fluorinated epoxy was prepared through the thiol-ene click reaction at first. The superhydrophobic surface with high oil-repellency was prepared by the addition of unmodified nano-SiO2and micron-SiO2to the fluorinated epoxy. The effect of the ratio of micro- and nano-silica particles on the morphology and wettability of the coating was investigated. It was shown that a re-entrant structure appears and FEP-S coating has good liquid repellency when the amounts of nano-SiO2and micro-SiO2are equal. The contact angles of the FEP-S coating (coating with the best liquid repellent performance) for water, glycerol, ethylene glycol, and diiodomethane were 158.6° ± 1.1°, 152.4° ± 0.9°, 153.4° ± 1.3°, and 140.7° ± 0.9°, respectively. In addition, the superhydrophobic coatings possess excellent mechanical and chemical durability, excellent performance in self-cleaning, corrosion resistance, and anti-icing properties. The preparation method of superhydrophobic coating is relatively simple; therefore, it has a wide range of applications and can also be applied to various substrates.Keywords:superhydrophobic;oleophobic;click chemistry;silica;fluorinated epoxy
研究领域:
材料科学
·
表面化学
·
涂层技术
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Huang Zhang,Peng Wang,Lin Shi,Jianliang Xue,Aiping Liang,Di Zhang
The adsorption of ofloxacin (OFL) on oxidized activated carbon (AC) and carbon nanotube (CNT) are compared, focusing on the differences in carbon structures. Chemical oxidation of carbonaceous materials inhibited OFL adsorption to AC, but enhanced their adsorption to CNT. The higher number of oxygen-containing functional groups facilitated the interaction of the material with water molecules, causing the blockage of AC inner pore. However, the dispersion of oxidized CNT enhanced due to its increased hydrophilicity, resulting in the exposure of some new adsorption sites, as identified by the 1 H NMR relaxometry measurement. The adsorption kinetics of OFL on AC indicated that the contributions of slow adsorption and equilibrium time increased after AC oxidation. However, the equilibrium time of the fast adsorption of OFL on CNT shortened after CNT oxidation. These results indicated that the pore of AC was blocked by water cluster and the accessibility of adsorption sites on oxidized CNT was enhanced due to dispersion. This study emphasizes that the structural differences among carbonaceous materials control the oxidation effects on their adsorption characteristics for OFL.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Shengkai Yang,Kelei Zhuo,Zezhong Zhang,Jianming Liu,Guangyue Bai,Jianji Wang
The low yield of graphene in the sonication-assisted aqueous-phase exfoliation is one of the challenges to its large-scale production in industry. Here, we report that hydrothermal exfoliation of graphite into graphene in NaF and polyether F127 (F127) solution can achieve a high concentration (0.55 mg mL–1) or yield (8.2%) of graphene in a low-cost, environmentally friendly manner. The defect of as-exfoliated graphene is comparable to that produced by the sonication-assisted exfoliation. In the exfoliation process, NaF and F127 are regarded as the intercalator and stabilizer. The thermal motion of H2O and F–/Na+ ion pairs, Brownian motion of graphite particles, and thermally agitation of graphite interlayers are the main driving force for exfoliating graphite. In addition, as filler of epoxy resin (EP), the graphene can enhance considerably the anticorrosion performance of EP coating. The hydrothermal exfoliation in NaF and F127 solution provides a new choice for the large-scale production of graphene.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Suya Zhou,Shuo Yang,Xinwei Ding,Yuchong Lai,Huagui Nie,Yonggui Zhang,Dan Chan,Huan Duan,Shaoming Huang,Zhi Yang
The sluggish reaction kinetics at the cathode/electrolyte interface of lithium–sulfur (Li–S) batteries limits their commercialization. Herein, we show that a dual-regulation system of iron phthalocyanine (FePc) and octafluoronaphthalene (OFN) decorated on graphene (Gh), denoted as Gh/FePc+OFN, accelerates the interfacial reaction kinetics of lithium polysulfides (LiPSs). Multiple in situ spectroscopy techniques and ex situ X-ray photoelectron spectroscopy combined with density functional theory calculations demonstrate that FePc acts as an efficient anchor and scissor for the LiPSs through Fe···S coordination, mainly facilitating their liquid–liquid transformation, whereas OFN enables Li-bond interaction with the LiPSs, accelerating the kinetics of the liquid–solid nucleation and growth of Li2S. This dual-regulation system promotes the smooth conversion reaction of sulfur, thereby improving the battery performance. A Gh/FePc+OFN-based Li–S cathode delivered an ultrahigh initial capacity of 1604 mAh g–1 at 0.2 C, with an ultralow capacity decay rate of 0.055% per cycle at 1 C over 1000 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yuhui Li,Meina Guo,Nan Zhao,Hailing Jiang,Fengping Zhou,Wuming Xie,Weihua Zhang
Spent pot-lining (SPL) and red mud (RM) are significant industrial solid wastes generated from the aluminum industry, holding valuable potential as secondary resources. This study addresses the pressing challenges of mitigating fluoride emissions resulting from the pyrometallurgical process of SPL and recovering iron (Fe) components from RM. To achieve these objectives, a synergetic reduction-stabilization process via co-calcination was proposed. During co-calcination, the carbonaceous content of SPL acts as a reducing agent, facilitating the reduction of Fe oxides in RM to magnetite (Fe 3 O 4 ). The recovered Fe 3 O 4 was efficiently separated through magnetic separation with 66.9% recovery efficiency. Additionally, the co-calcination process synergistically stabilizes fluoride emissions from SPL due to the presence of calcium oxide (CaO) in RM. This results in fluoride emissions reacting with CaO to form insoluble fluorite (CaF 2 ), leading to significantly reduced fluoride leaching concentrations (18.3 mg L −1 ), well below national recommended standards (100 mg L −1 ). Mineral transformations revealed that Na 3 AlF 6 from SPL decomposed into NaF, AlF 3 , and HF, with subsequent reactions with CaO leading to CaF 2 formation. The selectivity of element combinations among Ca-Fe-F-O can be attributed to the distinct ionic potentials in the HF-CaO-Fe 2 O 3 -C system, where CaF 2 arose from a hard acid (Ca(II))-hard base (F - ) interaction, and Fe 2 O 3 reduction was influenced by the weaker bonding between soft base O 2- and borderline acid Fe(III)/Fe(II) repulsion, according to the Hard-Soft Acid-Base (HSAB) theory. This proposed synergistic utilization approach not only detoxifies harmful fluoride emissions but also offers a sustainable method for Fe recovery, holding significant potential for environmental and economic benefits in the context of aluminum industry waste management practices.
研究领域:
环境科学
·
冶金工程
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2016
·Vol. 99
·期 5
·1498-1503
·
IF 2.787
Baoyan Chai,Luyuan Hao,Xiaojian Mao,Xin Xu,Xiaokai Li,Benxue Jiang,Long Zhang
Strontium fluorapatite particles with tunable morphologies and geometries were successfully synthesized via a precipitation system by adjusting the pH value and temperature. Several analysis techniques were used to investigate and characterize the particles. The surface energy was calculated using first-principle calculations based on density functional theory. Capsule-like nanosized primary grains with axial growth directions parallel to the c -axis were synthesized at higher pH values, resulting from the difference in surface energy for the different planes of the Sr 5 (PO 4 ) 3 F lattice. Bundle-like clusters were obtained at a pH value of ~7, which was attributed to a combination of the difference in surface energy and the phenomenon of heterogeneous nucleation occurring at low degrees of supersaturation. The study determined the approaches necessary to manufacture Sr 5 (PO 4 ) 3 F powders with specific characteristics for different applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Separations
·
2021
·Vol. 8
·期 6
·72
·
IF 2.777
Xiqiang Liu,Hui Zhang,Yunlong Liu
Apatite is an important carrier of rare earth elements (REEs) and phosphorite is a potential REEs resource. However, the influence of hydrothermal fluids on the migration and enrichment of REE in apatite remains controversial. The experimental study of the interaction between REE-bearing fluid and apatite is one of the essential ways to understand the chemical behavior of rare earth elements in apatite. In this study, we conducted the fluid–mineral reaction experimental study (at 400 °C, 50 MPa and 4–16 wt %) between high lanthanum (La) content hydrothermal solution and low REE content to reveal the influence of different salinities on the diffusion of rare earth elements in fluorapatite. Based on in situ geochemical analyses of experimental products, we show that the diffusion coefficients of La in fluorapatite are between 3.24 × 10−15and 5.88 × 10−15m2/s. The salinity of the fluid has a great influence on the diffusion coefficient, with the increase of salinity, the diffusion coefficient increase.Keywords:water–mineral reaction;fluorapatite;lanthanum;diffusion
研究领域:
地质学
·
地球化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yuanjing Wang,Yayun Zhou,Hong Ming,Yifei Zhao,Enhai Song,Qinyuan Zhang
Mn4+ non-equivalent doped fluorides with high color purity red emission and relatively short decay time are crucial for wide color gamut displays and emerging applications, whereas the low quantum efficiency (QE) restrains their further applications. Herein, the luminescence of Mn4+ non-equivalent doped fluoride K2NaAlF6:Mn4+ (KNAF:Mn4+) is significantly enhanced via a heterovalent co-doping strategy, where the luminescence intensity is obviously increased by ∼85%, but the decay time is almost unchanged. The experimental characterization and density functional theory (DFT) calculations provide an understanding of the luminescence enhancement mechanism of heterovalent co-doping, which is enabled by simultaneously improving the stability of Mn4+ and reducing the number of quenching centers (defects and impurities). Combining the short-decay-time (τ = 4.03 ms) emission KNAF:Mn4+, Mg2+ and long-decay-time (τ = 9.23 ms) emission K2SiF6:Mn4+, a novel monochromatic multiplexing mode in the millisecond order is presented, which can be decoded not only in high-efficiency by a digital camera but also with a high security. This work provides a new optical multiplexing for the information security applications and also inspires the design of high-efficiency Mn4+-activated luminescent materials.
研究领域:
材料科学
·
光学
·
信息科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）