JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Hui Shao,Bingqiao Yang,Huihua Luo,Ruiqi Ge,Jie Wu
In this study, N-OSS combined with DDA was examined as an novel collector. The collecting performances and their synergetic interaction mechanisms were investigated comprehensively. The micro-flotation results illustrated N-OSS/DDA exhibited excellent selectivity on separation without pre-activation. Contact angle tests revealed N-OSS/DDA could selectively enhance the hydrophobicity of spodumene, whereas, they barely affected that of albite. FTIR, SEM-EDS and Zeta potential revealed N-OSS/DDA might co-adsorb on spodumene surface rather than that of albite. XPS analysis and DFT calculations inferred the O 1 2p orbitals of -COO- within N-OSS could bond with Al 3s orbitals and the -NH 3 + groups of DDA adsorbed onto spodumene surface via hydrogen bonding and electrostatic attraction. Meanwhile, the hydrogen bonding between N-OSS and DDA promoted the co-adsorption on spodumene surface. While N-OSS/DDA weakly adsorbed on albite surface through physical adsorption. N-OSS/DDA exhibited outstanding floatability, which maybe a good substitute for conventional collectors in future.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2014
·
IF 1.714
An Liu,Min-qiang Fan,Pan-pan Fan
In this study, a modification of oil assisted flotation processes of quartz particles has been proposed, which is based on introduction of miscible Dodecylamine (DDA)-Kerosene as collector with DDA cationic surfactant coated on kerosene to the hydrophilic quartz particles in the pulp. The property of miscible DDA–Kerosene emulsion was investigated. Due to the adsorption of DDA at kerosene/water interface, a smaller and uniform kerosene emulsion formed. Addition of cationic surfactant to the kerosene emulsion changed the zeta potential value from negative to positive, which resulted in enhancing the adhesion of the oil droplets to negatively charged quartz. The results showed that agglomeration and flotation process can be realized simultaneously with DDA–Kerosene. The agglomeration of fine quartz minerals in the presence of miscible DDA–Kerosene led to the formation of very large compact agglomerates resulting in increasing hydrophobicity of the particles and inducing a higher probability of collision and adhesion to air bubble. Experimental data indicated that miscible DDA–Kerosene had better selectivity and stronger collectability to quartz than DDA–HCl, which can be used as an efficient collector in the reverse flotation of magnetic separation concentrate of TISCO. At the same DDA dosage (60 g/t), separation efficiency got to 18.53% when using DDA–HCl as collector; while a better result was obtained with DDA–Kerosene, the efficiency of separation reached 59.07% which was identical with 120 g/t DDA–HCl.
研究领域:
矿物加工工程
·
表面与界面化学
·
胶体与界面科学
·
资源综合利用
·
浮选药剂
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Xuesong Jiang,Jifei Sun,Boyuan Ban,Ling Wang,Linhua Hu,Jian Chen
This study investigates the novel application of polyetheramine (PEA) as an eco-friendly collector for quartz-mica flotation separation under pH-neutral conditions, focusing on its flotation behavior, adsorption mechanisms, and separation efficacy compared to the conventional dodecylamine (DDA). The single mineral flotation demonstrated the superior selectivity of PEA, achieving an 87 % flotation recovery differential (93 % for quartz vs. 6 % for mica), significantly outperforming the 26 % differential of DDA. The mixed minerals (mass ratio: Quartz/Mica = 2/1) flotation shows that PEA can effectively separate the quartz and the mica. Composition analysis shows that the flotation product phase composition is consistent with the single mineral. The quartz content in the 2nd froth product reaches 95.88 % (78.86 % recovery). The mica content in the sink product reaches 71.19 % (91.09 % recovery). Adsorption test analysis indicates that PEA and DDA are mainly adsorbed on minerals by electrostatic adsorption through the ─NH 3 + group. DFT calculations show that the difference in PEA adsorption energy between the quartz and the mica surfaces is 1.52 eV (DDA is only 0.2 eV). Based on the above results we analyzed the adsorption and separation mechanisms. The findings establish PEA as a sustainable alternative to conventional pH-dependent collectors, eliminating acid/alkali consumption while maintaining high separation efficiency.
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2026
·
IF 30.5
Wenbin Wang,Hongyu Zhang,Miao Guo,Chaoqun Li,Xian Zhou,Guanglin Xia,Xuebin Yu
Solvation sheath rearrangement is recognized as a key strategy for modifying electrolytes to enhance the kinetics of magnesium batteries. However, its fundamental mechanism diverges significantly from that in Li-ion batteries and remains inadequately understood. Herein, we elucidate the principle that solvation tuning essentially determines the distribution of reductive electrons, whose accumulation on ether molecules directly leads to challenging reorganization and severe solvent decomposition. To address this, a series of organic monoamine salts are designed as additives to capture and stabilize the reductive electrons in the solvation sheath, and screening guidelines are proposed to promote the kinetics and reversibility of Mg plating/stripping. Accordingly, we demonstrate an Mg pouch cell with ultrahigh power density (50C, 13 mA cm−2, 16.02 kW kg−1 based on the cathode), surpassing the power densities reported in all previous studies. This work offers new insights into solvation tuning strategies that are crucial in designing high-power-density Mg batteries.
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2026
·
IF 6.3
Xiaoqi Ban,Jin Yao,Wanzhong Yin,Wenju Sun,Taozhong Zhang,Chao Yin,Weifan Du,Junfeng Wang,Yulian Wang
Background The efficient separation of smithsonite from quartz remains a key bottleneck in the valorization of oxidized zinc ores. Conventional sulfidization flotation suffers from high reagent consumption, complex procedures, and elevated costs, highlighting the urgent need for novel processes and selective collectors for effective desilication and purification. Methods Microflotation experiments, zeta potential measurements, surface wettability analyses, FTIR, XPS, AFM, and ToF-SIMS were employed to investigate the flotation selectivity and interfacial interaction mechanisms of N-hexadecyl-N-methylpiperidinium bromide (HMPB) in the reverse flotation desilication of smithsonite. Findings Outstanding separation performance was achieved at pH 7.0 with an HMPB dosage of 7.5 mg/L, yielding a zinc concentrate grade of 47.01% and a recovery of 93.69%. The ζ-potential, wettability, FTIR, and XPS analyses confirmed that HMPB selectively interact with oxygen sites on quartz via synergistic electrostatic and hydrogen-bonding interactions, significantly increasing surface potential, hydrophobicity, and adhesion work, while showing negligible influence on smithsonite. Furthermore, AFM and ToF-SIMS analyses revealed the formation of a continuous HMPB adsorption layer exclusively on the quartz surface, where the distribution of organic fragments strongly correlates with Si rather than Zn, confirming the pronounced selectivity of HMPB for quartz and its effectiveness in sustainable desilication and purification.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Zhiyuan Ren,Bin Li,Yufeng Wu,Hui Liu,Feng Guo,Shaonan Tian,Jun Yang
Upcycling e-waste to enable efficient catalyst synthesis offers a sustainable pathway for solid waste management and the advancement of green catalysis. However, reconciling high catalytic performance with e-waste-derived materials remains challenging. Here, we report a low-cost, defect-engineered InOOH electrocatalyst derived from electronic waste (ew-InOOH/Vo-Sn), which is modulated through Sn incorporation and oxygen vacancy (Vo) engineering using In-dodecylamine (In-DDA) complexes derived from spent liquid crystal display panels (s-LCD), for the electrochemical CO 2 reduction reaction (eCO 2 RR). The material was rationally synthesized through theory-guided optimization of InOOH via Sn-incorporation and vacancy engineering, combined with the utilization of In-DDA complexes obtained from s-LCD leachates using a thiol-assisted wet-chemical strategy. At −0.97 V vs RHE, the ew-InOOH/Vo-Sn delivered a high formate Faradaic efficiency (FE formate ) of 92.8%, closely approaching that of the corresponding sample prepared from pure metal-salt precursors (ms-InOOH/Vo-Sn, 94.5%) under identical synthetic conditions, and comparable to the majority of In-based eCO 2 RR catalysts reported in the literature. Mechanistic insights reveal that Sn-incorporation stabilizes Vo in InOOH and synergistically alters the electronic states of neighboring In atoms, which strengthens CO 2 adsorption while optimizing the adsorption energetics of *OCHO and H* intermediates. Our findings demonstrate a sustainable pathway to design In-based electrocatalysts from electronic-waste, integrating resource recycling with energy conversion.
✓ 已验证
产品关联
DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2026
·Vol. 12
·期 8
·4330-4341
·
IF 6
Sun Yikun,Li Mingjun,Hao GuiPeng,Yang Zhen,Yang Lei
Postoperative re-tear remains a prevalent challenge in rotator cuff repair. To address this, we developed a bioactive glass composite rotator cuff patch (BCP) with heterogeneous structural design to promote tendon−bone interface regeneration. The BCP features an outer barrier of hydrophobic poly (lactic acid) (PLA) electrospun membrane, which prevents infiltration of inflammatory fibrotic tissue. The inner structure, fabricated via a dual-nozzle 3D printing strategy, comprises gelatin methacryloyl (GelMA) hydrogel layers differentially loaded with zinc-doped (ZnBG) or strontium-doped (SrBG) bioactive glass, targeting the tendon and bone regions, respectively. Bioactive glass enables sustained ion release within the physiological environment, establishing distinct ionic microenvironments across the tissue interface. In vitro , ZnBG-released ions significantly promoted the proliferation and migration of tendon-derived stem cells, upregulated mature tendon matrix expression, and inhibited fibrotic scarring. Conversely, SrBG-released ions enhanced the osteogenic differentiation and mineralization potential of bone marrow mesenchymal stem cells. In vivo evaluation further demonstrated that the BCP effectively facilitated organized collagen regeneration and improved the quality of its integration with bone. Additionally, the BCP favorably modulated the local immune microenvironment toward a reparative phenotype. In summary, this study presents an innovative biomaterial strategy for achieving comprehensive structural and functional regeneration of the tendon−bone interface following rotator cuff injury.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2026
·Vol. 37
·期 7
·e70673
·
IF 3.8
Bochao Pan,Jingyuan Xu,Donglin Tang
Biobased fibers have gradually gained attention with the development of fiber industry due to the characteristics of renewability and environmentally friendliness. For polyureas derived from urea and biobased diamine, the excellent properties such as high strength, high toughness, and rapid crystallization, offer them great potential in the construction and application of fiber materials. It is in this work aiming at constructing high-performance polyurea fibers, taking the problems of poor pulverizability and high melt viscosity into account. A three-step process, including prepolymerization, reactive extrusion, and drawing, was proposed and accomplished to conduct fiber formation for the polyurea. Prepolymerization was carried out via melting polycondensation from urea and 1,10-diaminodecane. The oligomer obtained was then able to be crushed into particles for extrusion. The reactive extrusion in which chain extension took place was conducive to increasing the molecular weight ( M n = 23.2 kg/mol). The obtained fiber was then further drawn at 160°C to increase the crystallinity and as a result, to increase the strength. A reorganization of crystal structure for the drawn yarn can be observed and improved crystallinity was detected. The tensile strength is found to be increased from 45 to 600 MPa after drawing, while the modulus is found to be from 1.1 to 5.9 GPa. It is concluded that the difficulties in the processing and formation of polyurea fiber have been solved in this study. Such technique developed here expands the application fields of polyurea materials and provides a new option for the development of high-performance biobased fibers.
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2026
·
IF 6.9
Qi Cheng,Sheng Liu,Shiyong Zhang,Guangyi Liu
Background In mixed anionic-cationic collector systems, sodium hexametaphosphate (SHMP) is commonly required as a depressant to realize the flotation separation of lepidolite from albite and quartz. However, its effect mechanism to the flotation performance of anionic-cationic collector is unclear. Methods Micro-flotation, contact angle, Zeta potential, adsorption capacity, optical microscopy, FTIR, in-situ AFM imaging and AFM force measurements were employed to investigate the flotation performance and the adsorption mechanism of SHMP and dodecylamine (DDA) + sodium lauryl sulfate (SLS) on lepidolite, albite and quartz. Significant Findings With 5.0×10 −5 mol/L SHMP pre-addition, DDA+SLS achieved 90.01% Li 2 O recovery with 4.04% Li 2 O grade from an artificial ternary mixture of 1.83% Li 2 O at pH∼7.0, DDA: SLS molar ratio = 2: 1 and C DDA +C SLS =1.5×10 −4 mol/L. SHMP adsorbed on albite and quartz by the hydrogen bonds between P-OH/P-O − groups of SHMP and Si-O − /Si-OH and Al-O − /Al-OH sites on albite as well as Si-O − /Si-OH sites on quartz. With SHMP+DDA+SLS addition, SHMP-DDA and SLS-DDA complexes formed and adsorbed onto lepidolite basal planes through the hydrophobic interactions, whereas no adsorption occurred on albite and quartz due to the absent hydrophobic interactions. This differential adsorption generated the distinct surface wettability, enabling the selective lepidolite recovery.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2026
·
IF 14.1
Wei Zou,Qing Wu,Jiawei Lin,Kunchen Li,Yulong Ying,Josep Puigmartí‐Luis,Salvador Pané,Sheng Wang
Micro‐ and nanomotors (MNMs) promise impact in the areas of environmental remediation and biomedicine, but reliable three‐dimensional (3D) control remains challenging. Conventional bubble‐propelled MNMs can move in 3D, yet their trajectories are stochastic and energy‐inefficient. Here we introduce a buoyancy‐regulated strategy inspired by cyanobacteria‐like microvesicles. We engineer sodium‐alginate (SA)hydrogel magnetic micromotors (SA/Cu‐TiO 2 /Fe 3 O 4 ), in which Cu‐TiO 2 is derived from the Ti‐based metal–organic framework MIL‐125(Ti v ), yielding a porous and defect‐rich photocatalyst with uniformly distributed Cu sites for enhanced H 2 O 2 decomposition and photocatalytic activity compared with pristine TiO 2 . Upon illumination, Cu‐TiO 2 catalyzes H 2 O 2 decomposition to generate O 2 pockets that are retained within the elastic, semipermeable alginate matrix, enabling programmable flotation and precise control of vertical ( Z ‐axis) position as part of full 3D navigation. We analyze the energetics and cross‐scale mass‐transport mechanisms governing this buoyancy control, and we demonstrate guided 3D motion through a maze via magnetic steering. In model turbid water, the micromotors achieve high removal performance across diverse organic contaminants. This bioinspired platform provides a prototype and motion‐control paradigm for 3D‐motile MNMs, advancing practical remediation in aquatic environments. In this work, cyanobacteria‐inspired sodium alginate (SA)/Cu‐TiO 2 /Fe 3 O 4 hydrogel micromotors generate and encapsulate O 2 microvesicles upon light irradiation, enabling buoyancy‐mediated Z ‐axis upward migration and surface enrichment at the light‐exposed water‐air surface. The synergistic combination of intensified light harvesting, efficient transmembrane pollutant diffusion, and concurrent photocatalytic/Fenton‐like reactive oxygen species (ROS) generation endows the micromotors with outstanding degradation capacity toward various organic pollutants, paving a feasible pathway for practical remediation of turbid, complicated wastewater systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Wenzheng Nie,Ruikuan Xie,Tiyao Ren,Huihui Bao,Linglan Men,Yongyu Pang,Guoliang Chai,Changlei Xia,Huan Xie
The renewable energy powered electrochemical CO 2 reduction (ECO 2 R) to the value-added chemicals is not only conducive to store intermittent renewable energy but also to reduce CO 2 emission, leading to a carbon neutral society. Herein, novel SnO nanodisks have been developed for highly selective formate production by ECO 2 R. The Faraday efficiencies of formate on SnO nanodisks all exceed 90% with the partial current density of formate ranging from 9.0 to 300.4 mA cm -2 , which is one of the widest potential range for highly selective formate production. In addition, the energy efficiency of formate production reaches 61% in a gas diffusion full cell. Electrochemical tests indicate that the morphology and the electronic structure of SnO nanodisks both contribute to the weakening of the binding of *CO 2 − intermediate. The density functional theory simulations indicate that the Sn 2+ sites weaken the binding of *OCHO intermediate than Sn 0 and Sn 4+ sites. The decreased binding property of *CO 2 − and *OCHO intermediates on SnO nanodisks promotes their protonation and the desorption of formate, thus reducing the overpotential for formate production and boosting the kinetics for ECO 2 R.
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Xueming Yin,Jin Yao,Bin Yang,Wanzhong Yin,Ningbo Song,Yu Xie,Jiayi Liu
The dissolution of complex silicate minerals has a significant influence on the flotation of quartz, but its effect and mechanism have not been clarified. In this work, the inhibition effect and mechanism of actinolite on quartz flotation using dodecylamine (DDA) as a collector were investigated via micro-flotation, mineral dissolution, adsorption tests, wrapping angle tests, Atomic Force Microscope (AFM) measurement, Fourier Transform Infrared Spectroscopy (FTIR), zeta potential characterization, contact angle tests, X-ray Photoelectron Spectroscopy (XPS) analyses, and solution chemistry calculation. Micro-flotation tests showed that actinolite adversely affected the flotation of quartz and the unfavorable effect increases with decreasing particle size and increasing content. The results of the surface analysis showed that the dissolved metal ions (i.e., Ca 2+ , Mg 2+ , and Fe 3+ ) from actinolite can be adsorbed on the quartz surface, hindering the adsorption of DDA on the quartz surface, reducing the hydrophobicity of the quartz surface, and thus decreasing the recovery of quartz. In addition, in the system of actinolite-quartz, the adsorption of DDA on actinolite and quartz is competitive, and the adsorption of more DDA on the surface of actinolite, which has a larger specific surface area, will weaken the adsorption of DDA on the surface of quartz and hinder the attachment of quartz particles on the surface of bubbles, thus inhibiting the flotation of quartz. In summary, the inhibition of quartz flotation by actinolite arises from a combination of metal ions dissolved in actinolite adsorbed on the quartz surface and competition between actinolite and quartz for adsorbed DDA.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）