CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Qiqi Zhou,Qi Chen,Wangjie Xu,Feng Wang,Xiaoqing Du,Yufan Zhou,Yulin Zhan,Man Jiang
Carbon electrode material is crucial for the development of electric double-layered supercapacitor in clean energy storage and rechargeable aspects. Although lignin consists the promising biomass based carbon resource for containing higher carbon atom ratio than 60 %, it is still the difficult challenge to precisely tailoring the porous structure characteristics and surface property to facilitate the electrolyte penetration and rapid ion transportation. Herein, the lignin nanotubes (LNT) were successfully synthesized in a convenient molecular self-assembly way, which were subsequently carbonized and activated, with introduction of melamine as nitrogen doping agent, into hetero-atom doped lignin carbon nanotubes (LCNT) as electrode material for supercapacitor. The resultant LCNT exhibit excellent pore structure , and high degree of graphitization. At a current density of 0.5 A/g, the as high specific capacitance as 391.4 F/g was achieved. Furthermore, under symmetric double-layered capacitor electrode systems, the as prepared N, S co-doped LCNT electrode demonstrated a specific capacitance of 28.6 F/g at a high current density of 20 A/g, which presented a practically applicable energy storage efficiency. It has convincingly demonstrate the substantial potential of LCNT as biomass derived carbon materials for electrochemical energy storage devices, positioning them as a promising and competitive candidate for electrode materials.
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Materials Chemistry Frontiers
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2024
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IF 6
Mohit Kumar,Bhimanaboina Ramulu,Jae Su Yu
To produce clean and green hydrogen energy from electrolytic water, better electrocatalytic materials need to be developed. Herein, we reported the development of a Ti3C2 MXene@Ni/Co sulfide hybrid material for the use in hydrogen evolution reaction (HER) process, which is effective and stable. The shape of metal sulfide and its interactions with Ti3C2 MXene caused electronic coupling. This increased both the exposed metal sulfide's active edge sites and the charge-transfer speed. When compared with pure MXene and Ti3C2 MXene@NiS nanostructure, Ti3C2 MXene@Co4S3 exhibited outstanding electrocatalytic activity and stability in the HER process. The unique properties of the skeletal structure and the robust interface interaction between Co4S3 and MXene are responsible for the superior performance of Ti3C2 MXene@Co4S3 in the HER process. Our research offers a practical method to synthesize specialized nanostructures for electrocatalysis, electronics, and other applications.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Zhaoxia Liu,Lili Zhao,Wangwang Tao,Rui Chen,Yu Zhou,Hongxiang Chen,Hongye Yan,Xinghua Liao
In order to obtain a kind of anticancer drug delivery carriers with good stability in blood circulation, high cellular uptake, and controlled drug release ability, folate-modified polyurethane with disulfide bonds and amino groups (FPUSN) and polyurethane with carboxyl groups (PUC) were respectively synthesized. FPUSN and PUC could co-assemble in water to form nanomicelles (FPUSN/PUC) via electrostatic interaction. When the mass ratio of FPUSN to PUC was 12, FPUSN/PUC-12 micelles had obvious negative-to-positive charge-reversal property with decreasing pH from 7.4 to 5.0. Doxorubicin-loaded micelles (FPUSN/PUC-12@DOX) with negative charges showed excellent stability under simulated normal physiological condition. However, the charge-reversal happened at pH 6.5 and positive charges increased with the pH decrease. When the glutathione concentration was 10 mM, the structure of FPUSN/PUC-12@DOX micelles was broken. So FPUSN/PUC-12@DOX micelles exhibited significant acid/reduction-sensitive drug release properties and then DOX could be rapidly released in simulated tumor intracellular environment. Cellular experimental results demonstrated that FPUSN/PUC-12 micelles could enhance cellular uptake under acid condition and FPUSN/PUC-12@DOX micelles had better anti-proliferation effect against HGC-27 cells at pH 6.5 than that at pH 7.4 owing to multi-responsive synergistic effects. Therefore, FPUSN/PUC micelles will have great application potential as drug delivery carriers for enhancing anticancer efficacy.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Jie Dang,Yijie Wu,Zepeng Lv,Xuewei Lv
Tungsten carbides , which can be widely used as cutting and drilling tools, chemical catalysts and aerospace coatings, have attracted widespread attentions. The present work reported a simple method to prepare tungsten carbides by using WO 2 as the raw materials and CO as the reduction and carbonization agent. It was found that at lower and moderate temperatures, all the final product was WC, while at higher temperatures, the final products were W 2 C or W. The reduction and carbonization mechanism was also studied theoretically and experimentally. WO 2 was reduced and carburized to WC in one step at lower temperatures; WO 2 was first reduced and carburized to W 2 C and then to WC at moderate temperatures; while at higher temperatures, WO 2 was first reduced to metallic W and then carbonized to WC or W 2 C, but with the temperature increasing, the carbonization became difficult and required much higher CO content.
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Surfaces and Interfaces
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2024
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IF 5.7
Hongjie Ding,Dasai Ban,Cong Wang,Huali Nie,Jiaxing Huang
The Kirschner wire (K-wire) is a versatile and effective external fixator in orthopedic surgery. However, a recognized challenge associated with the use of K-wires is the potential for bacterial migration and subsequent infection as the wire passes through the skin and penetrates the bone. In this study, we developed a straightforward method for depositing antibacterial ions on K-wires by redox-assisted co-deposition. This method offers several advantages over conventional coating techniques , including uniformity, high coverage, strong adhesion , and scalability. As a result, K-wires treated with this method have a rapid and long-lasting antimicrobial effect. Both in vitro and in vivo experiments have demonstrated that these antimicrobial K-wires have an excellent bacterial elimination . The results of this study provide new opportunities for the application of robust and multifunctional antibacterial coating materials on implantable devices with great potential in the fields of orthopedics, transplantation and surgery.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2024
·Vol. 107
·期 5
·3577-3586
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IF 3.5
Peng Wei,Shixin Zhao,Lei Zhuang,Hulei Yu,Yexia Qin,Yanhui Chu
The synthesis of high-quality nanopowders is crucial to developing high-performance, high-entropy rare-earth silicates (HERESs). Herein, we report the synthesis of HERES nanopowders, including high-entropy rare-earth monosilicates (HEREMs) and high-entropy rare-earth disilicates (HEREDs), via a simple chemical co-precipitation method for the first time. By rationally optimizing the synthesis conditions, monoclinic HEREM nanopowders can be well synthesized with highly uniform element distributions. The formation of HEREM nanoparticles is governed by the production of the precursor from the co-precipitation reactions between rare-earth hydroxide and silicic acid at the atomic scale, followed by the dehydration of precursor skeletons. Furthermore, the validation of using this approach to prepare HERED nanopowders is also confirmed. This research will open up a new research area in synthesizing HERES nanopowders.
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VACUUM
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2024
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IF 3.8
Xiaoying Yu,Chunhong Gao,Jinjia Liu,Jiang Wang,Meilin Jia,Gala Sa,Aiju Xu
Photocatalytic technology has good stability and ecological friendliness which is used to treat organic pollutants in wastewater. In this paper, TiO 2 , 1.5%V–TiO 2 and N, V co-doped TiO 2 were synthesized by hydrothermal method for photocatalytic degradation of tetracycline. Meanwhile, XRD , HRTEM , SEM, FT-IR, XPS, UV–Vis DRS , PL and electrochemistry tests were used to characterize the catalysts. The results showed that the appropriate amount of N, V co-doped can cause structural changes of TiO 2 . The co-doped of N and V enhanced the photocurrent response of TiO 2 , increased the specific surface area, reduced the band gap, and improved the efficiency of photodegradation of tetracycline. Accordingly, the tetracycline photocatalytic degradation path was proposed. 6%N-1.5%V–TiO 2 completely degraded tetracycline into CO 2 , H 2 O and NO 3 − . The calculation results show that an appropriate amount of N, V co-doped TiO 2 decreased bandgap, improved the optical absorption performance of TiO 2 . This work demonstrated the potential of N, V co-doped to design efficient photocatalysts .
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POLYMER COMPOSITES
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2024
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IF 4.8
Zhou Xu,Xiuying Qiao,Kang Sun,Yujie Chen,Hezhou Liu
Great environmental and economic benefits can be achieved by utilizing the agricultural residue corn stover (CS) to prepare the biodegradable poly(butylene adipate-co-terephthalate) (PBAT) composites. However, CS contains polarized hydroxyl groups from its main component cellulose, thus leading to its poor wetting by hydrophobic PBAT. It is of great significance to promote the compatibility between CS and PBAT for the improvement of interfacial interactions and composite performance, but the compatibilizer modified CS/PBAT biocomposites have been rarely mentioned until now. In this study, polyethylene glycol (PEG), glycidyl methacylate (GMA), and ethylene vinyl alcohol copolymer (EVOH) were chosen to investigate the compatibilizer effect on the morphology, microstructure, thermal properties, mechanical strength, and water absorption capacity of the biodegradable CS/PBAT composites. The results reveal that the incorporated compatibilizers obviously improve the interface adhesion between CS and PBAT by reducing the hydrophilicity of CS surface. The enhanced interfacial bonding interactions effectively promote the crystallinity and mechanical strength of the CS/PBAT composites, but the initial degradation temperature and hydrophilicity of compatibilizers themselves also remarkably influence the composites’ thermostability and water absorption. Highlights The agricultural residue corn stover (CS) was used to reinforce PBAT. Effects of three different compatibilizers on the composites were studied. Compatibilizer improves the interface adhesion between CS and PBAT. Compatibilizer promotes crystallinity and mechanical strength of composites. The stability and hydrophilicity of compatibilizer affect those of composite.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Guangcai Ma,Wenbin Li,Fei Wang,Lunyong Zhang,Bin Chen,Xiujun Yu,Wenqing Hu,Ting Ding,Baiyang Zhou,Zhuo Zhang
As an intriguing strategy for massive hydrogen production, photoelectrochemical (PEC) seawater splitting compels the anode to be highly hypochlorite-resistant. Inspired by algae, we designed a robust photoelectrocatalyst that WO 3 nanorods (NRs) are covered by N/W co-doped (Co, Ni, W)O x N y nanosheets (NSs). The NSs expose (111) faces and are decorated by (Co, Ni)WO 4 nanoparticles. DFT calculations reveal that Co and Ni atoms on the (111) surface of N/W co-doped NSs are more likely to adsorb OH - , while W atoms are more favorable to adsorb Cl - . Secondly, the lattice distortion and multi-crystal phases of NSs are triggered by doped W atoms, and the evacuation of 5d electrons makes W atoms as donor centers, leading to enhanced catalytic activity of CoNi atoms and corrosion resistance to Cl - . Furthermore, the N atoms expand the valence band of CoNiO x and elevate the conduction band of (Co, Ni)WO 4 , facilitating more electrons to participate in PEC reaction and the realization of seawater full-splitting. Resultantly, the N/W co-doped (Co, Ni, W)O x N y /WO 3 hetero-NRs (HNRs) demonstrate a PEC current density about 0.35 mA/cm 2 at 1.23 V RHE with durability over 100 hours in seawater. This work provides a practical strategy towards the durable PEC anode for seawater splitting.
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ACS Applied Nano Materials
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2024
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IF 5.3
Yaohua Gu,Jiping Han,Ni Zhang,Weisong Yan,Yue Guo,Huiyi Tan,Changyi Yang,Fuke Wang,Huiqin Yao
Nanozyme possess the advantages of high enzyme simulation activity, low cost, and excellent stability. As a substitute for natural enzymes, nanozyme have demonstrated significant potential in various fields. In this study, a bimetallic organometallic framework Cu@Co-MOFs was synthesized via the hydrothermal method using terephthalic acid (H2BDC) as a ligand and characterized. Cu@Co-MOFs exhibits outstanding peroxidase activity (POD) by catalyzing the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) and other color-developing substrates through •OH formation. A simple, rapid, and reliable colorimetric method for quantitatively detecting glutathione (GSH) was developed based on the Pod-like activity of Cu@Co-MOFs. The linear range of this method was 1–1200 μM with a detection limit of 0.72 μM. This work not only proposes a bimetallic organic framework with high POD as a straightforward and practical platform for visually detecting GSH but also provides a strategy to enhance the performance of nanomaterials.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Zhaoqian Zhang,Hongxia An,Qiaoxia Hu,Junping Miao,Genghao Gong,Yunxia Hu
Dopamine-assisted co-deposition is a promising approach for preparing nanofiltration (NF) membranes due to its simplicity, controllability, and versatility. However, limited research has been conducted on the functionalization and membrane formation mechanism of polydopamine (PDA) co-deposition membranes. In this study, lysozyme (Lys) was selected as one model protein and co-deposited with dopamine to prepare antibacterial NF membranes. The effects of the mass ratio of PDA/Lys and deposition time on the selective layer structure and membrane performance, and membrane-forming mechanism were systematically investigated. Results prove that addition of lysozyme into a dopamine solution promotes the rapid formation of a dense selective layer, and the maximum density of the PDA/Lys co-deposition layer reaches 1.53 g·cm −3 with the optimal 1:0.50 mass ratio of dopamine and lysozyme, and the resulting membranes have the effective pore size of 1.5 nm in diameter. The optimal PDA/Lys membranes can achieve high methyl blue (MB) rejection (98.2 %) and low salt rejection (13.1 % for NaCl) while maintaining high water permeance (42.4 L·m −2 ·h −1 ·bar −1 ) and demonstrating excellent long-term operational stability. Moreover, the NF membranes made from co-deposition of PDA and Lys exhibited outstanding antibacterial properties with 92 % bacterial-killing efficiency. Our work provides a simple method for utilizing functional proteins to prepare antibacterial NF membranes, and offers new insights into the membrane-forming mechanism of dopamine-assisted co-deposition membranes.
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CERAMICS INTERNATIONAL
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2011
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IF 1.472
Xinghong Zhang,Yang Hou,Ping Hu,Wenbo Han,Junting Luo
The dispersion and co-dispersion behavior of ZrB 2 and SiC nanopowders in ethanol solution was studied by sedimentation test, particle size measurement and transmission electron microscope (TEM) analysis. The dispersion behavior of ZrB 2 and SiC nanopowders in ethanol solution was strongly dependent on the pH values, types and amounts of dispersant. PEI was found to be effective for the dispersion of both ZrB 2 and SiC nanopowders in ethanol solution. With the addition of PEI, the isoelectric points of ZrB 2 and SiC nanopowders in ethanol solution were at pH 10 and pH 9.5, and shift to pH 13 and pH 12.3, respectively. The stability of ZrB 2 suspension increased with the dispersant content increasing until reached 0.7 wt% and well-dispersed SiC slurry can be obtained with more than 2.5 wt% PEI. The suitable pH value for the dispersion of ZrB 2 and SiC nanopowders should be lower than 12 and 10, respectively. The well co-dispersed ZrB 2 and SiC nanocomposite powders can be achieved by using 1 wt% or more PEI below pH 10.
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