International Journal of Minerals Metallurgy and Materials
·
2026
·Vol. 33
·期 8
·2541-2552
·
IF 8.8
Wei Xinlei,Sun Yongsheng,Wei Xiaotong,Gao Peng
Malachite, a typical copper oxide ore, exhibits strong hydrophilicity; therefore, it also exhibits poor flotation recovery. In this study, sulfidation roasting was applied as a pretreatment strategy to improve the flotation efficiency of malachite. Pyrite was used as the sulfidation agent during roasting, the feasibility of which was verified using thermodynamic calculations. Microflotation experiments demonstrate that the flotation recovery of malachite increased by nearly 70% compared with that of the untreated sample. X-ray diffraction analysis indicates that the malachite decomposed into CuO during roasting and mainly formed CuS and Cu 2 S after sulfidation. This result was further supported by X-ray photoelectron spectroscopic analysis, which revealed the presence of S (S 2− , S
2− 2
, and S
2− n
) and Cu (Cu + and Cu 2+ ) species in different oxidation states on the surfaces of the roasted sample, as well as a notable decrease in oxygen content. In addition, the formation of copper sulfides disrupted the original porous structure, which led to a decrease in internal pore size. The contact angle increased from 43.71° to 89.29° after sulfidation roasting, indicating that the hydrophobicity of malachite improved markedly. Zeta potential results further indicate that the surface electronegativity increased owing to the adsorption of S species. Overall, sulfidation roasting using pyrite improved the floatability of malachite by generating hydrophobic copper sulfides on the mineral surfaces, thereby demonstrating its potential as an effective pretreatment for copper oxide ores.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaopei Li,Peng Lu,Zhaoyang Liu,Ziang Wen,Xiangyu Li,Chufan Wang,Wanjun Jin,Bin Zhou,Ningping Huang,Meijuan Song,Xiaowei Wang
Effective therapies for myocardial infarction (MI) are essential in lowering associated mortality rates. While hydrogel-based patch therapy has shown promise in improving post-MI cardiac function; it falls short in terms of mature stimulation and lacks the necessary combination of conductive, mechanical, and anisotropic cues for optimal efficacy. In this study, we developed an anisotropic hydrogel by incorporating polydopamine-reduced graphene oxide-ferric oxide (PDA-rGO-Fe 3 O 4 ) nanohybrids into gelatin methacrylate (GelMA) hydrogels under a direct current-driven magnetic field. Cardiomyocytes (CMs) cultured on anisotropic hydrogels demonstrated oriented growth and exhibited symmetrical contraction-relaxation behaviors, surpassing the performance of cells cultured on pure GelMA and isotropic ones. Moreover, both external electrical and alternating magnetic field stimulations enhanced sarcomere functionality, gap junction protein expression, and electrophysiological activities in CMs within the anisotropic hydrogel group. In an acute MI rat model, the application of the anisotropic hydrogel patch significantly improved cardiac function, mitigated adverse left ventricular (LV) dilation and remodeling, reduced infarct size, increased LV wall thickness, promoted angiomyogenesis, and preserved the structural and connected features between CMs. Overall, our findings highlight the potential of electromagnetic, conductive, and anisotropic GelMA-based hydrogels as scaffolds for mimicking the natural functional myocardium layer and developing effective cardiac patches.
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Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 47
·11372-11383
·
IF 7
Luxing Wei,Yuan Li,Xiaoyong Qiu,Xiaolai Zhang,Xiaoyu Song,Yunpeng Zhao,Qing Yu,Jinlong Shao,Shaohua Ge,Jun Huang
Developing underwater stable and durable hydrogel coatings with drag-reducing, drug release, and antibacterial properties is essential for lots of biomedical applications. However, most hydrogel coatings cannot meet the requirement of underwater stability and versatility, which severely limits their widespread use. In this work, an underwater stable, durable and substrate-independent gelatin composite hydrogel (GMP) coating is developed through covalent crosslinks, where a silane coupling agent with an unsaturated double bond is grafted onto a substrate of co-deposited polydopamine and polyethylenimine. GMP coating can be easily coated onto various medical device surfaces, such as artificial joints, catheters, tracheal tubes and titanium alloys, showing excellent structural stability and mechanical tunability under extreme conditions of ultrasonic treatment for 1 h (400 W of ultrasonic power) or underwater shearing for 14 days (400 rpm). Besides, friction experiment reveals that GMP coating exhibits good lubrication properties (coefficient of friction < 0.003). The drug-loading and bacterial inhibition ring tests show that the GMP coating has a tunable drug release ability with the final releasing ratios of 70–95% by changing the content of poly (ethylene glycol) diacrylate. This work offers a scalable approach of fabricating bio-functional and stable hydrogel coatings, which can be potentially used in biomedical applications.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zihao Gao,Yongjun Jiang,Zheyi Sun,Bin Shao,Rongting Ma,Zhonghao Jia,Lihui Zhou,Sheng Dai,Jun Hu
Integrated CO 2 capture and conversion (iCCC) technology has been recognized as the most efficient technology for Carbon Capture, Utilization, and Storage (CCUS). However, its industrialization is hindered by some unsolved engineering problems. Typically, sulfur impurities in most industrial flue gas will have significant poisoning effects on the process. Herein, we report integrations of SO 2 removal, CO 2 capture and conversion (iSCCC) at an isothermal intermediate temperature in a two-fixed-bed column system. By rationally developing the SO 2 adsorbent pellets of ZnO-CaO, the CO 2 adsorbent pellets of AMS-MgO, and the methanation catalyst pellets of Ni-La/Al 2 O 3 , each individual unit is optimized. Specifically, the in-situ dynamic structure evolution observed by the atmospheric aberration-corrected scanning transmission electron microscopy as well as the theoretical dynamics calculation provide an in-depth understanding of the CO 2 desorption performance changing with the temperature on the AMS-MgO pellets, which builds a bridge for a successful 99.3 % CO 2 methanation efficiency. As a result, the matched iSCCC process demonstrates exceptional performance from simulated flue gas containing 1000 ppm SO 2 and 20 vol% CO 2 , with full desulfurization and decarbonation and a CO 2 conversion efficiency of 93.6 % after 20 cycles isothermally at 400 °C, superior to all the reported performance so far as we know, providing a promising route to practical large-scale iSCCC towards carbon neutrality.
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BIOMATERIALS
·
2023
·
IF 14
Bohong Yu,Yubo Liu,Yingxi Zhang,Linyi Xu,Kai Jin,Andi Sun,Xiuli Zhao,Yongjun Wang,Hongzhuo Liu
Mitochondrial dysfunction plays a major role in driving acute kidney injury (AKI) via alteration in energy and oxygen supply, which creates further ROS and inflammatory responses. However, mitochondrial targeting medicine in recovering AKI is challenging. Herein, we conjugated SS31, a mitochondria-targeted antioxidant tetrapeptide connecting a cleavable linker to rapamycin (Rapa), which provided specific interaction with FK506-binding protein (FKBP) in the RBCs . Once entering the bloodstream, SS31-Rapa could be directed to the intracellular space of RBCs, allowing the slow diffusion of the conjugate to tissues via the concentration gradient . The new RBC hitchhiking strategy enables the encapsulation of conjugate into RBC via a less traumatic and more natural and permissive manner, resulting in prolonging the t 1/2 of SS31 by 6.9 folds. SS31-Rapa underwent the direct cellular uptake, instead of the lysosomal pathway, released SS31 in response to activated caspase-3 stimulation in apoptotic cells, favoring the mitochondrial accumulation of SS31. Combined with autophagy induction associated with Rapa, a single dose of SS31-Rapa can effectively reverse cisplatin and ischemia reperfusion-induced AKI. This work thus highlights a simple and effective RBC hitchhiking strategy and a clinically translatable platform technology to improve the outcome of other mitochondrial dysfunctional related diseases.
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Journal of the American Chemical Society
·
2023
·
IF 15
Zhi-Zheng Wu,Xiao-Long Zhang,Peng-Peng Yang,Zhuang-Zhuang Niu,Fei-Yue Gao,Yu-Cai Zhang,Li-Ping Chi,Shu-Ping Sun,Jing-Wen DuanMu,Pu-Gan Lu,Ye-Cheng Li,Min-Rui Gao
Carbon–carbon coupling electrochemistry on a conventional copper (Cu) catalyst still undergoes low selectivity among many different multicarbon (C2+) chemicals, posing a grand challenge to achieve a single C2+ product. Here, we demonstrate a laser irradiation synthesis of a gerhardtite mineral, Cu2(OH)3NO3, as a catalyst precursor to make a Cu catalyst with abundant stacking faults under reducing conditions. Such structural perturbation modulates electronic microenvironments of Cu, leading to improved d-electron back-donation to the antibonding orbital of *CO intermediates and thus strengthening *CO adsorption. With increased *CO coverage on the defect-rich Cu, we report an acetate selectivity of 56 ± 2% (compared to 31 ± 1% for conventional Cu) and a partial current density of 222 ± 7 mA per square centimeter in CO electroreduction. When run at 400 mA per square centimeter for 40 h in a flow reactor, this catalyst produces 68.3 mmol of acetate throughout. This work highlights the value of a Cu-containing mineral phase in accessing suitable structures for improved selectivity to a single desired C2+ product.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jundan Tang,Lihua Shen,Kunpeng Zhao,Jiaming Peng,Qili Chen,Chunxia Yu,Yuangang Li,Azhar Abbas,Shan Wang,Zhifang Liu
Nanomaterials-based gas sensors are conducive to online, real-time monitoring and large-scale production due to their simplicity, low energy consumption and miniaturization. Conventional nanomaterial-based (metal oxide semiconductor or two-dimensional nanomaterials) gas sensors are less sensitive (ppm-ppb level). So, it is significantly meaningful to develop new gas-sensing materials. Herein, Ag@sulfur nanosheets (S-NSs) nanocomposite-based sensor is explored for ultrasensitive detection of NH 3 in dry air at room temperature at parts per trillion (ppt) level. Introducing Ag nanoparticles (NPs) on S-NSs, improved electrical conductivity and created more effective adsorption sites, leading to a high response rate of 1.92 for 3 ppt NH 3 . The developed Ag@ S-NSs sensor showed a linear response to NH 3 in the range of 3–70 ppt with correlation coefficient of 0.996. Moreover, the developed Ag@S-NSs sensor showed fast response and recovery time (28/7 s) to NH 3 . The probable sensing mechanism is supposed that the polarization-induction of NH 3 changed of electronic energy level of Ag@S-NSs, and the changed energy is at approximately the same energy level of the Ag@S-NSs itself. Thus, a response signal caused by NH 3 with low concentration can also be felt by Ag@S-NSs sensing materials itself.
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ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2023
·
IF 2.9
Feng Qing,Yang Jing,Dou Mingyuan,Zou Shuai,Wei Lixia,Huang Fuchuan
To achieve the goal of developing high-performance lubricant additives for industrial lubrication. Herein, tetradecylphosphonic acid (TDPA) modified Ti 3 C 2 T X and graphene oxide (GO) were used as nanohybrid lubricant additives in the polyalphaolefins base oil (PAO6). The high-speed reciprocating friction and wear test shows that TDPA–Ti 3 C 2 /GO is an efficient friction-reduction and antiwear additive. The base oil mixed with 0.05 wt%TDPA–Ti 3 C 2 /0.05 wt% GO exhibits the lowest coefficient of friction (COF) and wear rate with the value of 0.09 and 4.4 × 10 –6 mm 3 /Nm, decreased by 54.5 and 90.0% compared with pure PAO6 oil, respectively. Detailed characterization analysis shows that the tribological film of the modified TDPA–Ti 3 C 2 /GO nanohybrids oil-lubricated surface was mainly composed of PAO6, TDPA, GO, and iron oxide. This indicates that the friction-reduction and antiwear mechanism of TDPA–Ti 3 C 2 /GO in base oil lies in the adsorption of the two nanomaterials and the formation of a self-lubricating film on the rubbing interface. This study provides a new approach to the design of nanohybrid lubricant additives and creates new prospects for the application of nanomaterials in tribology.
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Advanced Materials Interfaces
·
2023
·Vol. 10
·期 35
·2300235
·
IF 5.4
Mingyang Liu,Guangyao Zhao,Cheng Yang,Han Wang,Jing Cheng
Laser-inducing provides a cost-effective, easily-manufacturable, and environment-friendly approach to directly transfer carbon-rich polymers into graphene materials, which attracts attention from various fields, such as sensors, electrocatalysts, micro-supercapacitors, etc. Laser-induced graphene (LIG) benefits from the intrinsic properties of graphene, for example, high conductivity, high electroactivity, and high specific area. In this work the potential of laser-induced graphene in constructing an enzymatic electrochemical biosensing interface is evaluated. Here, a laminar-structured laser-induced graphene material is fabricated by laser engraving with polyimide. After deposition of the electron mediator ferrocene, a conjugated enzyme complex of bovine serum albumin-glucose oxidase (BSA-GOx) is modified on the laser-induced graphene by cross-linking. The fabricated glucose oxidase/ferrocene/LIG (GOx/Fc/LIG) biosensor achieves high sensitivity of 11.3 µA mM −1 cm −2 ), wide linear range of 0–11 mM, and low detection of limit of 0.04 µM. The LIG electrodes exhibit high flexibility with bending angle as high as 60° without observed conductivity change. The repeatability and robustness of the developed LIG biosensor in detection of real serum samples empower it with great potential in clinical implementation in the future.
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Journal of Energy Storage
·
2023
·
IF 9.4
Jiahui Hu,Wu Tang,Yan Hong,Bangshuai Wei,Shan Jia,Meichen Guo,Chenbin Tang,Xuesong He,Cong Fan
A non-flammable potassium-ion battery is constructed by using an advanced n-type organic cathode called 2PTCDA@C and K-metal anode in triethyl phosphate electrolyte, which can show the peak discharge capacity of 125 mAh g −1 cathode in 1.5–3.5 V and stably run for 100 cycles.
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Soft Matter
·
2023
·Vol. 19
·期 38
·7370-7378
·
IF 3.4
Qinghao Guo,Wenguang Yang,Huibin Liu,Wenhao Wang,Zhixing Ge,Zheng Yuan
Taking inspiration from the locomotor behaviors of a butterfly, we have developed an underwater soft robot that imitates its movements. This biomimetic robot is constructed using a deformable photo-responsive material that exhibits high biological compatibility and impressive deformation capabilities in response to external stimuli. First, we investigate composite materials consisting of poly-N-isopropylacrylamide (PNIPAM) and multi-walled carbon nanotubes (MWCNTs). Then, using photocuring printing technology, we successfully fabricate a biomimetic butterfly soft robot utilizing these composite materials. The robot is driven by visible light, enabling it to achieve periodic wing movement and fly upward at an average speed of 3.63 mm s−1. In addition, the robot achieves additional functionalities such as flying over obstacles and carrying small objects during the ascending flight. These outcomes have a significant impact on the advancement of flexible biomimetic robots and offer valuable insights for the research of biomimetic robots driven by visible light.
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JOURNAL OF SURFACTANTS AND DETERGENTS
·
2023
·
IF 1.6
Yuhui Wei,Xuejiao Cao,Xue Ling,Zhaowei Su,Zihao Wan,Kaixuan Liu,Chuchu Shemin,Wei Pan
To develop an environment-friendly detergent for textile relics adsorbing soil/rust stains, the relationship between surfactant types and concentrations, the nature of additives and the type of textile (e.g., cotton, linen, silk or wool) were systematically investigated. Results showed that the detergent formulations of sodium montmorillonite (5 g/L) as additives were overall the best options for soil stains removal on textile relics. Specifically, the most suitable surfactant for cotton, linen, silk and wool textiles relics adsorbing soil stains was rhamnolipid (8 g/L), tea saponin (6 g/L), tea saponin (8 g/L), alkyl glycosides (10 g/L), respectively. The detergent formulations of ascorbic acid (5 g/L) as additives were more beneficial for rust stains peeling-off from the surface of the textile relics regardless of the type of surfactant and textile relics. But the optimal surfactants for different textiles relics were different. In detail, the most suitable surfactants for cotton, linen, silk and wool textiles relics adsorbing rust stains were separately rhamnolipid (10 g/L), Tea saponin (8 g/L), Tea saponin (6 g/L), Alkyl glycosides (6 g/L). This indicated that the washing effect of detergent formulation was related to the types of stains and textile relics' fiber. These findings not only demonstrated the necessity for developing detergent formulations for different textile relics, but also illustrated the complexity and diversity of the textile relics' stain-washing work. Moreover, this work also assists understanding of the washing mechanism of textile relics and help the department of textile relics protection to properly wash textile relics and extend the life of textile relics.
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