RESOURCES CONSERVATION AND RECYCLING
·
2021
·
IF 10.204
Liming Yang,Genping Yi,Bo Wang,Penghui Shao,Yufa Feng,Yanbiao Liu,Kai Yu,Fuqiang Liu,Lingling Liu,Xubiao Luo,Shenglian Luo
Simultaneous recovery and value-added conversion of hazardous heavy metal ions from complex wastewater sources is of great significance yet challenging. Herein, we demonstrate that highly toxic antimonite Sb(III) could be effectively recovered from antimony (Sb) mine flotation wastewater and converted into high-value-added metallic Sb using a novel facile atomic H* enhanced electrochemical reduction avenue coupled with thermal reduction by H 2 gas. The high production of atomic H* generated from the electrochemical cathode with an optimum reduction potential of –1.2 V vs . Ag/AgCl, which is lower than the Sb(III) reduction potential of –1.0 V, might be attributable to the superior Sb recovery capabilities. Furthermore, the metallic Sb concentration at –1.2 V was 14.43 times greater than at –1.0 V due to the strong reductivity of atomic H*. In addition, Sb(III) removal efficiency was found to be as high as 98.52%, with a metallic Sb recovery rate of up to 1.67 mg min –1 . The efficiency of Sb(III) recovery was demonstrated throughout a wide pH range, with metallic Sb being the main product, independent of the presence of multiple coexisting ions. Economic analysis also indicated that treating Sb mine flotation wastewater per ton may yield a net profit of $40.09. This research contributes to the advancement of an atomic H* enhanced electrochemical technology for high-valued heavy metal recovery from complex heavy metal-polluted wastewater.
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高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 50
·期 3
·1060-1068
·
IF 4.174
Run-Ze Yuan,Peng-Fei Cui,Shu-Ting Guo,Guo-Xin Jin
Herein, we describe the synthesis of tetraphenylphosphonium o-carboranyl dithiocarboxylate (Ligand 1) and methyldithiocarboxyl-o-carborane (Ligand 2). The complexes [Cp*M(o-C2B10H11CS2)Cl] (M = Ir (3); Rh (4)) and [Cp*M(o-C2B10H11CS2)2] (M = Ir (5); Rh (6)) have been synthesized based on Ligand 1. The selective B–H bond activation of Ligand 2 has also been explored, leading to the synthesis of the B–H activated complex [Cp*Ir(o-C2B10H10CS2CH3)Cl] (7) and four of its substituted derivatives (8, 9, 10 and 11). All of these compounds have been characterised through single-crystal X-ray diffraction, NMR, IR spectroscopy and elemental analysis.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Zhuo Zhang,Xiaoming Duan,Baofu Qiu,Zhihua Yang,Delong Cai,Peigang He,Dechang Jia,Yu Zhou
Textured hexagonal boron nitride (h-BN) matrix composite ceramics were prepared by hot pressing using 3Y 2 O 3 -5Al 2 O 3 (mole ratio of 3:5) and 3Y 2 O 3 -5Al 2 O 3 -4MgO (mole ratio of 3:5:4) as liquid phase sintering additives, respectively. During the sintering process with liquid phase environments, platelike h-BN grains were rotated to be perpendicular to the sintering pressure, forming the preferred orientation with the c -axis parallel to the sintering pressure. Both h-BN matrix ceramic specimens show significant texture microstructures and anisotropic mechanical and thermal properties. The h-BN matrix ceramics prepared with 3Y 2 O 3 -5Al 2 O 3 -4MgO possess higher texture degree and better mechanical properties. While the anisotropy of thermal conductivities of that prepared with 3Y 2 O 3 -5Al 2 O 3 is more significant. The phase compositions and degree of grain orientation are the key factors that affect their anisotropic properties.
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高影响因子
PROGRESS IN ORGANIC COATINGS
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2017
·
IF 2.858
Fei Gao,Jiancheng Cao,Qibo Wang,Ren Liu,Shengwen Zhang,Jingcheng Liu,Xiaoya Liu
A series of ultraviolet (UV)-curable self-healing polyurethane (PU) oligomers were synthesized by incorporating different contents of 2-ureido-4[1H]-pyrimidone and polycarbonate diols (PCDL) with different molecular weights at the end of PU chains. The structure of the oligomers were determined through Nuclear magnetic resonance ( 1 H NMR) and Fourier transform infrared spectroscopy. The PU oligomers were used to produce UV-curable self-healing coatings, the properties of which were investigated and the properties of the coatings with different functionality were studied. The results revealed that the performance of the coating was higher when a higher molecular weight of PCDL was used and With functionality increasing, the crosslinking density of the coating ascends, resulting in higher self-healing temperature and upper pendulum hardness and gloss of the coating. To balance the self-healing ability and mechanical properties of the coating, a series of coating formulations were designed by adding different types and amounts of active diluents. Double bond conversion, thermostability, and self-healing ability were investigated to determine the effect of active diluents on coating performance. The results demonstrated that the resultant coating have excellent adhesion, gloss, and thermostability. Coatings prepared used all types of active diluents had favorable self-healing ability, except for that prepared using 2-acryloyloxymethyl-2-ethyltrimethylene diacrylate. Excellent self-healing and mechanical properties were obtained when 20 w.t.% of triethoxylated trimethylolpropane triacrylate was used.
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高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jian-Min Li
The author reports an anthracene vapor-assisted transport growth (∼4.8% in yield) of freestanding atomically thin pristine two-dimensional (2D) hexagonal boron nitride (h-BN) nanoplates directly from bulk powders. A room-temperature dilute magnetism was first observed in the pyrolytic 2D [0001] h-BN nanoplates, which is attributed to the missing N atom numbers (NN) or existence of a nitrogen-vacancy (Nv) with volume fraction ∼1.46%. Upon the postannealing in ammonia, the unsupported ammoniated 2D h-BN nanoplates showed an enhanced robust ferrimagnetism with the effective magnetic moment as high as 0.024 μB/per N, and Néel temperature at 174.9 K. At 295 K, a symmetric electron paramagnetic resonance peak signal was experimentally measured at g ∼ 2.1267, revealing the presence of an unpaired electron trapped at a B atom site in B-rich h-BN. As a promising 2D dilute magnetic semiconductor candidate, our finding favors the ammoniated atom-thin h-BN nanoplate for realization of spintronic nanodevices operating at room temperature.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jie Zhou,Siyuan Jin,Ruizhi Wu,Xiaochun Ma,Mengyao Pang,Zhe Yu,Guixiang Wang,Jinghuai Zhang,Boris Krit,Sergey Betsofen,Vitalii Neshchimenko,Buzikov Ruslan,Min Qiu,Yurong Yang,Jiaming Chen
Microarc oxidation (MAO) coatings incorporating hexagonal boron nitride (h-BN) nanoparticles were synthesized on Mg-Li alloys. The effects of h-BN nanoparticle concentration on the structure, phase composition, and tribological properties of the MAO coatings were systematically investigated. The results indicate that the addition of h-BN nanoparticles induces the formation of protrusions on the coating surface, varied in size and distribution with the concentration of h-BN particles. The protrusions are advantageous for enhancing the wear resistance of the coating, owing to the effective reduction of the contact area and the lubricating impact of the released h-BN particles during wear. The thickness and hardness of the coating contained h-BN particles are significantly elevated. At an optimal h-BN concentration of 7 g/L, the composite coating exhibits the lowest average coefficient of friction (COF = 0.59) and the minimum wear rate (W = 2.6 × 10 −6 mm 3 /N·m), thereby demonstrating superior tribological performance.
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高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2025
·Vol. 58
·期 20
·205501
·
IF 3.2
Fan Li,Chuansheng Zhang,Yi Luo,Xiaoxiao Kong,Cheng Zhang,Boxue Du,Tao Shao
Hexagonal boron nitride (h-BN) has emerged as a critical thermal management material in electrical insulation systems due to its superior thermal conductivity and dielectric properties. Nevertheless, suboptimal filler-matrix interfacial compatibility hinders both thermal conductivity enhancement and dielectric performance in composites. This study introduces an innovative plasma bubble treatment strategy, utilizing the discharge within bubbles to simultaneously achieve h-BN exfoliation and surface hydroxylation. By producing plasma in a 3% H2O2 solution with Ar/O2 mixed gas, hydroxyl groups are successfully grafted onto h-BN surfaces. This surface modification improves the silane grafting efficiency with KH560, resulting in improved filler dispersion within the epoxy resin (EP) and the introduction of deep charge traps in interfacial regions. Under 9.77 W discharge power, composites containing 20 wt% h-BN treated for 10 min exhibits optimal performance characteristics. The modified composite attains a 327% thermal conductivity of pure EP while showing superior dielectric properties with a 12.4% increase in breakdown strength relative to untreated composite. These findings present an effective surface engineering approach for developing high-performance polymer composites for electrical insulation applications.
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高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 15
·3401-3411
·
IF 6.331
Ming Wang,Miao Li,Yunli Wang,Yiran Shao,Yingchun Zhu,Shiping Yang
Hydroxyapatite (HA) has attracted wide attention for medical application due to its biocompatibility and bioactivity. However, the infection problems of HA remain among the leading reasons for implantation failure. Thus, it is urgent to endow HA biomaterials with antibacterial activity. Herein, the high antibacterial activity was achieved by introducing trace Mn3+ and H vacancy couples in HA through a facile heat-treatment strategy in air. The theoretical results indicated that Mn3+ was preferentially substituted for the Ca(2) site in the HA structure with a charge-compensating H vacancy appearing at the adjacent OH− site. The antibacterial tests showed that Mn-HA possessed antibacterial activity towards both E. coli and S. aureus with trace Mn content at the ppm level, and implied that Mn3+ and centers may play an important role in the antibacterial process. The Mn3+ and couples in Mn-HA, serving as oxidative and reductive centers respectively, could then collectively participate in the CoQ/CoQH2 redox cycling and synergistically facilitate the accumulation of CoQ˙− and ROS radicals. This enhanced ROS production was the main factor to endow Mn-HA with efficient antibacterial activity. Moreover, the in vitro bioactivity assay showed that Mn-HA materials exhibited enhanced osteogenic activity and good biocompatibility. Therefore, this work not only provides a feasible method to control the oxidation state of Mn elements in HA, but also proposes a novel trace Mn3+-doped HA for potential applications in tissue engineering.
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PubMed
高影响因子
ChemSusChem
·
2022
·Vol. 15
·期 24
·e202201554
·
IF 9.14
Yuanjun Zhao,Yanyang Qin,Xinyu Da,Xianjun Weng,Yiyang Gao,Guoxin Gao,Yaqiong Su,Shujiang Ding
Due to the unique safety qualities, solid composite polymer electrolyte (SCPE) has achieved considerable attentions to fabricate high-energy-density lithium metal batteries, but its overall performance still has to be improved. Herein, a high lithium salt content poly(vinylidene fluoride) (PVDF)-based SCPE was developed, enhanced by hexagonal boron nitride (h-BN) nanosheets, presenting perfect electrochemical performance, fast ion transport, and efficient inhibition of lithium dendrite growth. The optimized SCPE (PVDF-L70-B5) could deliver high ionic conductivity (2.98×10 −4 S cm −1 ), ultra-high Li + ion transfer number (0.62), wide electrochemical stability window (5.24 V), and strong mechanical strength (3.45 MPa) at room temperature. Density functional theory calculation further confirmed that the presence of h-BN could promote the dissociation of bis(trifluoromethanesulfonyl)imide lithium (LiTFSI) and the rapid transfer of Li + ions. As a result, the assembled symmetric Li/Li battery and asymmetric Li/LiFePO 4 battery using PVDF-L70-B5 SCPEs both exhibited high reversible capacity, long-term cycle stability, and high-rate performance when cycled at 60 or 30 °C. The designed SCPEs will open up a new route to synthesize solid-state lithium batteries with high energy density and high safety. Graphical Polymer electrolyte : High lithium salt content poly(vinylidene fluoride)-based solid composite polymer electrolyte enhanced by hexagonal boron nitride nanosheets is prepared, which presents perfect electrochemical performance, fast ion transport, and efficient inhibition of lithium dendrite growth.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2017
·
IF 2.714
Jingwen Song,Kai Ma,Tifeng Jiao,Ruirui Xing,Lexin Zhang,Jingxin Zhou,Qiuming Peng
Graphene oxide (GO)-based nanocomposite films via facile and appropriate self-assembly methods have demonstrated many potential applications in wide fields. This study demonstrates a facile and clean route to prepare graphene oxide-dye composite films using Langmuir-Blodgett (LB) technique at room temperature. By electrostatic interaction between cationic dye molecules and negatively charged GO sheets as well as π-π interactions, GO-dye composite LB films were formed spontaneously. As a soft platform for dye molecules, GO sheets induce dye molecules to self-assemble and form highly ordered structures containing H-aggregates and/or J-aggregates. The morphological characterization results show the formation of GO-dye composite films with smooth and dense surfaces. And the spectral results reveal that dye molecules stack in well-organized aggregates on the surface of GO sheets corresponding to monomers in bulk solution. The present research work about GO-dye composite films by LB method may provide new clues to prepare organized composite films and demonstrate potential applications in many fields.
研究领域:
材料科学
·
纳米科技
·
表面化学
·
胶体与界面科学
·
功能薄膜
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高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2022
·Vol. 20
·期 1
·1-16
·
IF 9.429
Liu Jie,Hu Xiaochun,Feng Lei,Lin Yun,Liang Shujing,Zhu Zhounan,Shi Shuo,Dong Chunyan
Background Non-redundant properties such as hypoxia and acidosis promote tumor metabolic adaptation and limit anti-cancer therapies. The key to the adaptation of tumor cells to hypoxia is the transcriptional and stable expression of hypoxia-inducible factor-1 alpha (HIF-1α). The phosphorylation-activated tumorigenic signal PI3K/AKT/mTOR advances the production of downstream HIF-1α to adapt to tumor hypoxia. Studies have elucidated that acid favors inhibition of mTOR signal. Nonetheless, carbonic anhydrase IX (CAIX), overexpressed on membranes of hypoxia tumor cells with pH-regulatory effects, attenuates intracellular acidity, which is unfavorable for mTOR inhibition. Herein, a drug delivery nanoplatform equipped with dual PI3K/mTOR inhibitor Dactolisib (NVP-BEZ235, BEZ235) and CAIX inhibitor 4‐(2‐aminoethyl) benzene sulfonamide (ABS) was designed to mitigate hypoxic adaptation and improve breast cancer treatment. Results ABS and PEG-NH 2 were successfully modified on the surface of hollow polydopamine (HPDA), while BEZ235 and Chlorin e6 (Ce6) were effectively loaded with the interior of HPDA to form HPDA-ABS/PEG-BEZ235/Ce6 (H-APBC) nanoparticles. The release of BEZ235 from H-APBC in acid microenvironment could mitigate PI3K/mTOR signal and resist HIF-1α-dependent tumor hypoxia adaptation. More importantly, ABS modified on the surface of H-APBC could augment intracellular acids and enhances the mTOR inhibition. The nanoplatform combined with phototherapy inhibited orthotopic breast cancer growth while reducing spontaneous lung metastasis, angiogenesis, based on altering the microenvironment adapted to hypoxia and extracellular acidosis. Conclusion Taken together, compared with free BEZ235 and ABS, the nanoplatform exhibited remarkable anti-tumor efficiency, reduced hypoxia adaptation, mitigated off-tumor toxicity of BEZ235 and solved the limited bioavailability of BEZ235 caused by weak solubility. Graphical Abstract
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PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2017
·
IF 4.075
Zheng Su,Hua Wang,Xianzhu Ye,Konghu Tian,Weiqi Huang,Yulan Guo,Jing He,Xingyou Tian
Thermally conductive poly (2-ethylhexyl acrylate) (P2EHA)/functionalized graphene/h-boron nitride composites materials were fabricated by colloid blending and self-assembly approach. Here, self-assembly technology has been used to achieve the facile surface modification of hexagonal boron nitride (h-BN) microplatelets by forming a functionalized graphene (f-G) sheets on its surface via π-π interaction. The polar functionality on the graphene surface allowed the permeation of the polymer matrix through the secondary interaction between them, increasing the content of this hybridized filler in composite. The effective and successful fabrication of f-G@h-BN microplates have been confirmed by SEM, Raman spectroscopy , XRD , and TGA investigations. The self-alignment 2D stacked fillers result in higher in-plane thermal conductivities and excellent electrical insulation of the composites. In addition to the good adhesive properties , the procedure is environment-friendly, easy operation, and potential for the practical application in large scale.
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高影响因子
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